{
 "slug": "dallas-tx",
 "place": {
  "name": "Dallas",
  "state": "TX",
  "census_name": "Dallas city",
  "census_geoid": "4819000",
  "lat": 32.79333,
  "lon": -96.76651,
  "station_distance_km": 26.3
 },
 "station": {
  "id": "USW00003927",
  "name": "DALLAS FT WORTH AP, TX US",
  "lat": 32.8978,
  "lon": -97.0189,
  "elevation_m": 170.7,
  "elevation_ft": 560,
  "source_urls": {
   "monthly": "https://www.ncei.noaa.gov/data/normals-monthly/1991-2020/access/USW00003927.csv",
   "annual": "https://www.ncei.noaa.gov/data/normals-annualseasonal/1991-2020/access/USW00003927.csv"
  }
 },
 "period": "1991-2020",
 "units": {
  "temperature": "F",
  "precipitation": "in",
  "snowfall": "in",
  "days": "days",
  "dates": "MM-DD",
  "prob_low_le_32f_pct": "percent"
 },
 "months": [
  {
   "month": 1,
   "name": "January",
   "high_f": 56.5,
   "low_f": 36.1,
   "mean_f": 46.3,
   "precip_in": 2.53,
   "snow_in": 0.1,
   "days_precip_ge_0_01in": 6.9,
   "days_precip_ge_0_10in": 4.0,
   "days_snow_ge_1_0in": 0.0,
   "days_high_ge_90f": 0.0,
   "days_high_le_32f": 0.7,
   "days_low_le_32f": 10.6,
   "prob_low_le_32f_pct": 99.7
  },
  {
   "month": 2,
   "name": "February",
   "high_f": 60.9,
   "low_f": 40.1,
   "mean_f": 50.5,
   "precip_in": 2.76,
   "snow_in": 1.0,
   "days_precip_ge_0_01in": 6.9,
   "days_precip_ge_0_10in": 4.3,
   "days_snow_ge_1_0in": 0.3,
   "days_high_ge_90f": 0.1,
   "days_high_le_32f": 0.5,
   "days_low_le_32f": 6.2,
   "prob_low_le_32f_pct": 94.1
  },
  {
   "month": 3,
   "name": "March",
   "high_f": 68.6,
   "low_f": 47.8,
   "mean_f": 58.2,
   "precip_in": 3.3,
   "snow_in": 0.3,
   "days_precip_ge_0_01in": 7.8,
   "days_precip_ge_0_10in": 4.8,
   "days_snow_ge_1_0in": 0.2,
   "days_high_ge_90f": 0.1,
   "days_high_le_32f": 0.0,
   "days_low_le_32f": 1.9,
   "prob_low_le_32f_pct": 68.7
  },
  {
   "month": 4,
   "name": "April",
   "high_f": 76.1,
   "low_f": 55.2,
   "mean_f": 65.6,
   "precip_in": 3.22,
   "snow_in": 0.0,
   "days_precip_ge_0_01in": 6.9,
   "days_precip_ge_0_10in": 4.5,
   "days_snow_ge_1_0in": 0.0,
   "days_high_ge_90f": 0.7,
   "days_high_le_32f": 0.0,
   "days_low_le_32f": 0.0,
   "prob_low_le_32f_pct": 4.3
  },
  {
   "month": 5,
   "name": "May",
   "high_f": 83.6,
   "low_f": 64.5,
   "mean_f": 74.0,
   "precip_in": 4.78,
   "snow_in": 0.0,
   "days_precip_ge_0_01in": 9.1,
   "days_precip_ge_0_10in": 6.4,
   "days_snow_ge_1_0in": 0.0,
   "days_high_ge_90f": 6.9,
   "days_high_le_32f": 0.0,
   "days_low_le_32f": 0.0,
   "prob_low_le_32f_pct": 0.0
  },
  {
   "month": 6,
   "name": "June",
   "high_f": 91.5,
   "low_f": 72.2,
   "mean_f": 81.9,
   "precip_in": 3.7,
   "snow_in": 0.0,
   "days_precip_ge_0_01in": 7.2,
   "days_precip_ge_0_10in": 5.3,
   "days_snow_ge_1_0in": 0.0,
   "days_high_ge_90f": 22.3,
   "days_high_le_32f": 0.0,
   "days_low_le_32f": 0.0,
   "prob_low_le_32f_pct": 0.0
  },
  {
   "month": 7,
   "name": "July",
   "high_f": 95.6,
   "low_f": 75.8,
   "mean_f": 85.7,
   "precip_in": 2.08,
   "snow_in": 0.0,
   "days_precip_ge_0_01in": 4.4,
   "days_precip_ge_0_10in": 2.9,
   "days_snow_ge_1_0in": 0.0,
   "days_high_ge_90f": 28.7,
   "days_high_le_32f": 0.0,
   "days_low_le_32f": 0.0,
   "prob_low_le_32f_pct": 0.0
  },
  {
   "month": 8,
   "name": "August",
   "high_f": 95.8,
   "low_f": 75.7,
   "mean_f": 85.7,
   "precip_in": 2.18,
   "snow_in": 0.0,
   "days_precip_ge_0_01in": 5.2,
   "days_precip_ge_0_10in": 3.2,
   "days_snow_ge_1_0in": 0.0,
   "days_high_ge_90f": 27.6,
   "days_high_le_32f": 0.0,
   "days_low_le_32f": 0.0,
   "prob_low_le_32f_pct": 0.0
  },
  {
   "month": 9,
   "name": "September",
   "high_f": 88.6,
   "low_f": 68.5,
   "mean_f": 78.5,
   "precip_in": 2.72,
   "snow_in": 0.0,
   "days_precip_ge_0_01in": 5.1,
   "days_precip_ge_0_10in": 3.7,
   "days_snow_ge_1_0in": 0.0,
   "days_high_ge_90f": 16.2,
   "days_high_le_32f": 0.0,
   "days_low_le_32f": 0.0,
   "prob_low_le_32f_pct": 0.0
  },
  {
   "month": 10,
   "name": "October",
   "high_f": 78.4,
   "low_f": 57.1,
   "mean_f": 67.7,
   "precip_in": 4.37,
   "snow_in": 0.0,
   "days_precip_ge_0_01in": 7.1,
   "days_precip_ge_0_10in": 4.8,
   "days_snow_ge_1_0in": 0.0,
   "days_high_ge_90f": 3.6,
   "days_high_le_32f": 0.0,
   "days_low_le_32f": 0.1,
   "prob_low_le_32f_pct": 2.6
  },
  {
   "month": 11,
   "name": "November",
   "high_f": 66.6,
   "low_f": 46.2,
   "mean_f": 56.4,
   "precip_in": 2.53,
   "snow_in": 0.0,
   "days_precip_ge_0_01in": 6.2,
   "days_precip_ge_0_10in": 4.1,
   "days_snow_ge_1_0in": 0.0,
   "days_high_ge_90f": 0.1,
   "days_high_le_32f": 0.0,
   "days_low_le_32f": 2.3,
   "prob_low_le_32f_pct": 64.0
  },
  {
   "month": 12,
   "name": "December",
   "high_f": 57.9,
   "low_f": 38.3,
   "mean_f": 48.1,
   "precip_in": 2.84,
   "snow_in": 0.2,
   "days_precip_ge_0_01in": 6.5,
   "days_precip_ge_0_10in": 4.2,
   "days_snow_ge_1_0in": 0.1,
   "days_high_ge_90f": 0.0,
   "days_high_le_32f": 0.5,
   "days_low_le_32f": 8.1,
   "prob_low_le_32f_pct": 99.7
  }
 ],
 "annual": {
  "high_f": 76.7,
  "low_f": 56.5,
  "mean_f": 66.6,
  "precip_in": 37.01,
  "snow_in": 1.6,
  "days_precip_ge_0_01in": 79.3,
  "days_snow_ge_1_0in": 0.6,
  "days_high_ge_90f": 106.2,
  "days_high_le_32f": 1.7,
  "days_low_le_32f": 29.2
 },
 "frost": {
  "semantics": {
   "last_spring": "PRBLST: an N% chance that the last night at or below the threshold comes on or after this date",
   "first_fall": "PRBFST: an N% chance that the first night at or below the threshold has come by this date",
   "season_days": "PRBGSL: length of the season above the threshold, days; P50 is the median"
  },
  "thresholds_f": [
   36,
   32,
   28,
   24,
   20,
   16
  ],
  "probabilities_pct": [
   10,
   20,
   30,
   40,
   50,
   60,
   70,
   80,
   90
  ],
  "table": {
   "36": {
    "status": "computed",
    "freeze_in_most_years": true,
    "last_spring": {
     "10": "04-09",
     "20": "04-02",
     "30": "03-30",
     "40": "03-25",
     "50": "03-21",
     "60": "03-17",
     "70": "03-13",
     "80": "03-08",
     "90": "03-02"
    },
    "first_fall": {
     "10": "10-30",
     "20": "11-03",
     "30": "11-06",
     "40": "11-09",
     "50": "11-13",
     "60": "11-16",
     "70": "11-20",
     "80": "11-24",
     "90": "11-30"
    },
    "season_days": {
     "10": 263.0,
     "20": 253.0,
     "30": 247.0,
     "40": 242.0,
     "50": 237.0,
     "60": 231.0,
     "70": 226.0,
     "80": 220.0,
     "90": 212.0
    }
   },
   "32": {
    "status": "computed",
    "freeze_in_most_years": true,
    "last_spring": {
     "10": "03-26",
     "20": "03-19",
     "30": "03-15",
     "40": "03-12",
     "50": "03-08",
     "60": "03-04",
     "70": "02-28",
     "80": "02-24",
     "90": "02-17"
    },
    "first_fall": {
     "10": "11-06",
     "20": "11-11",
     "30": "11-15",
     "40": "11-19",
     "50": "11-24",
     "60": "11-28",
     "70": "12-02",
     "80": "12-05",
     "90": "12-12"
    },
    "season_days": {
     "10": 288.0,
     "20": 279.0,
     "30": 273.0,
     "40": 267.0,
     "50": 262.0,
     "60": 256.0,
     "70": 251.0,
     "80": 245.0,
     "90": 236.0
    }
   },
   "28": {
    "status": "computed",
    "freeze_in_most_years": true,
    "last_spring": {
     "10": "03-14",
     "20": "03-10",
     "30": "03-05",
     "40": "03-01",
     "50": "02-25",
     "60": "02-19",
     "70": "02-13",
     "80": "02-07",
     "90": "01-30"
    },
    "first_fall": {
     "10": "11-15",
     "20": "11-23",
     "30": "11-28",
     "40": "12-03",
     "50": "12-07",
     "60": "12-11",
     "70": "12-16",
     "80": "12-21",
     "90": "12-28"
    },
    "season_days": {
     "10": 320.0,
     "20": 308.0,
     "30": 301.0,
     "40": 294.0,
     "50": 288.0,
     "60": 280.0,
     "70": 275.0,
     "80": 268.0,
     "90": 257.0
    }
   },
   "24": {
    "status": "computed",
    "freeze_in_most_years": true,
    "last_spring": {
     "10": "03-07",
     "20": "02-28",
     "30": "02-21",
     "40": "02-13",
     "50": "02-07",
     "60": "01-31",
     "70": "01-28",
     "80": "01-19",
     "90": "01-07"
    },
    "first_fall": {
     "10": "11-28",
     "20": "12-05",
     "30": "12-11",
     "40": "12-18",
     "50": "12-24",
     "60": "12-30",
     "70": "01-04",
     "80": "01-12",
     "90": "01-22"
    },
    "season_days": {
     "10": 352.0,
     "20": 341.0,
     "30": 333.0,
     "40": 327.0,
     "50": 319.0,
     "60": 311.0,
     "70": 304.0,
     "80": 295.0,
     "90": 281.0
    }
   },
   "20": {
    "status": "computed",
    "freeze_in_most_years": true,
    "last_spring": {
     "10": "02-27",
     "20": "02-12",
     "30": "02-04",
     "40": "01-30",
     "50": "01-24",
     "60": "01-17",
     "70": "01-11",
     "80": "01-02",
     "90": "12-21"
    },
    "first_fall": {
     "10": "12-10",
     "20": "12-18",
     "30": "12-25",
     "40": "12-31",
     "50": "01-04",
     "60": "01-10",
     "70": "01-15",
     "80": "01-24",
     "90": "02-06"
    },
    "season_days": {
     "10": 365.0,
     "20": 365.0,
     "30": 365.0,
     "40": 356.0,
     "50": 348.0,
     "60": 342.0,
     "70": 334.0,
     "80": 326.0,
     "90": 310.0
    }
   },
   "16": {
    "status": "computed",
    "freeze_in_most_years": false,
    "last_spring": {
     "10": "02-13",
     "20": "02-05",
     "30": "01-30",
     "40": "01-21",
     "50": "01-14",
     "60": "01-10",
     "70": "01-05",
     "80": "01-01",
     "90": "12-20"
    },
    "first_fall": {
     "10": "12-18",
     "20": "12-28",
     "30": "01-01",
     "40": "01-04",
     "50": "01-09",
     "60": "01-13",
     "70": "01-20",
     "80": "02-01",
     "90": "02-12"
    },
    "season_days": {
     "10": 365.0,
     "20": 365.0,
     "30": 365.0,
     "40": 365.0,
     "50": 365.0,
     "60": 365.0,
     "70": 365.0,
     "80": 354.0,
     "90": 341.0
    }
   }
  },
  "notes": []
 },
 "derived": {
  "hottest_month": {
   "month": 7,
   "name": "July",
   "value": 85.7
  },
  "coldest_month": {
   "month": 1,
   "name": "January",
   "value": 46.3
  },
  "hottest_month_by_high": {
   "month": 8,
   "name": "August",
   "value": 95.8
  },
  "wettest_month": {
   "month": 5,
   "name": "May",
   "value": 4.78
  },
  "driest_month": {
   "month": 7,
   "name": "July",
   "value": 2.08
  },
  "snowiest_month": {
   "month": 2,
   "name": "February",
   "value": 1.0
  },
  "winter": "mild",
  "summer": "hot",
  "precipitation": "moderate",
  "snow": "light",
  "annual_precip_in": 37.01,
  "annual_snow_in": 1.6,
  "annual_range_f": 39.4,
  "mean_daily_range_f": 20.2,
  "months_high_ge_90f": [
   6,
   7,
   8
  ],
  "months_low_le_32f": [],
  "last_spring_32f_p50": "03-08",
  "first_fall_32f_p50": "11-24",
  "freeze_free_days_p50": 262.0,
  "freeze_free_span_days_p50": 261
 },
 "rules": {
  "hottest_coldest_month": "by monthly mean temperature (MLY-TAVG-NORMAL); ties go to the earlier month",
  "wettest_driest_month": "by monthly precipitation normal (MLY-PRCP-NORMAL); ties go to the earlier month",
  "winter": {
   "basis": "mean temperature of the coldest month, F",
   "bands": [
    [
     null,
     20,
     "very cold"
    ],
    [
     20,
     32,
     "cold"
    ],
    [
     32,
     45,
     "cool"
    ],
    [
     45,
     60,
     "mild"
    ],
    [
     60,
     null,
     "warm"
    ]
   ]
  },
  "summer": {
   "basis": "mean daily high of the hottest month (by high), F",
   "bands": [
    [
     null,
     70,
     "cool"
    ],
    [
     70,
     80,
     "mild"
    ],
    [
     80,
     90,
     "warm"
    ],
    [
     90,
     100,
     "hot"
    ],
    [
     100,
     null,
     "very hot"
    ]
   ]
  },
  "precipitation": {
   "basis": "annual precipitation normal, inches (sum of months if no annual value)",
   "bands": [
    [
     null,
     10,
     "arid"
    ],
    [
     10,
     20,
     "semi-arid"
    ],
    [
     20,
     40,
     "moderate"
    ],
    [
     40,
     60,
     "wet"
    ],
    [
     60,
     null,
     "very wet"
    ]
   ]
  },
  "snow": {
   "basis": "annual snowfall normal, inches; 'no data' when NOAA publishes no snowfall normal",
   "bands": [
    [
     null,
     1,
     "rare or none"
    ],
    [
     1,
     12,
     "light"
    ],
    [
     12,
     36,
     "moderate"
    ],
    [
     36,
     72,
     "heavy"
    ],
    [
     72,
     null,
     "very heavy"
    ]
   ]
  },
  "bands": "lower bound inclusive, upper bound exclusive",
  "frost_free": "true when the 32F last-spring and first-fall P50 dates are -9999 with flag Y (insufficient values) and the 32F growing season P50 is 365 days or the annual number of nights at or below 32F rounds to 0.0",
  "freeze_free_days_p50": "NOAA ANN-TMIN-PRBGSL-T32FP50 (median length of the 32F freeze-free season), as published",
  "freeze_rare": "true when 32F dates are published but the 32F growing season P50 is 365 days: no 32F night in at least half of years; the P50 spring and fall dates then cross and freeze_free_span_days_p50 is null",
  "freeze_free_span_days_p50": "days from the 32F P50 last-spring date to the 32F P50 first-fall date (next year if the fall date is earlier in the calendar); differs from the NOAA median season length because a median of lengths is not the span between median dates"
 },
 "flags": {
  "frost_free": false,
  "freeze_rare": false,
  "frost_data_missing": false,
  "year_round_frost_risk": false,
  "snow_normal_absent": false,
  "incomplete_months": []
 },
 "quality": {
  "high_f": {
   "column": "MLY-TMAX-NORMAL",
   "absent": false,
   "comp_flags": [
    "S"
   ],
   "meas_flags": [],
   "years_min": 28,
   "missing_months": 0
  },
  "low_f": {
   "column": "MLY-TMIN-NORMAL",
   "absent": false,
   "comp_flags": [
    "S"
   ],
   "meas_flags": [],
   "years_min": 24,
   "missing_months": 0
  },
  "mean_f": {
   "column": "MLY-TAVG-NORMAL",
   "absent": false,
   "comp_flags": [
    "S"
   ],
   "meas_flags": [],
   "years_min": 24,
   "missing_months": 0
  },
  "precip_in": {
   "column": "MLY-PRCP-NORMAL",
   "absent": false,
   "comp_flags": [
    "S"
   ],
   "meas_flags": [],
   "years_min": 30,
   "missing_months": 0
  },
  "snow_in": {
   "column": "MLY-SNOW-NORMAL",
   "absent": false,
   "comp_flags": [
    "S"
   ],
   "meas_flags": [
    "X"
   ],
   "years_min": 28,
   "missing_months": 0
  },
  "days_precip_ge_0_01in": {
   "column": "MLY-PRCP-AVGNDS-GE001HI",
   "absent": false,
   "comp_flags": [
    "S"
   ],
   "meas_flags": [],
   "years_min": 30,
   "missing_months": 0
  },
  "days_precip_ge_0_10in": {
   "column": "MLY-PRCP-AVGNDS-GE010HI",
   "absent": false,
   "comp_flags": [
    "S"
   ],
   "meas_flags": [],
   "years_min": 30,
   "missing_months": 0
  },
  "days_snow_ge_1_0in": {
   "column": "MLY-SNOW-AVGNDS-GE010TI",
   "absent": false,
   "comp_flags": [
    "S"
   ],
   "meas_flags": [
    "X"
   ],
   "years_min": 30,
   "missing_months": 0
  },
  "days_high_ge_90f": {
   "column": "MLY-TMAX-AVGNDS-GRTH090",
   "absent": false,
   "comp_flags": [
    "S"
   ],
   "meas_flags": [],
   "years_min": 28,
   "missing_months": 0
  },
  "days_high_le_32f": {
   "column": "MLY-TMAX-AVGNDS-LSTH032",
   "absent": false,
   "comp_flags": [
    "S"
   ],
   "meas_flags": [
    "X"
   ],
   "years_min": 28,
   "missing_months": 0
  },
  "days_low_le_32f": {
   "column": "MLY-TMIN-AVGNDS-LSTH032",
   "absent": false,
   "comp_flags": [
    "S"
   ],
   "meas_flags": [
    "X"
   ],
   "years_min": 24,
   "missing_months": 0
  },
  "prob_low_le_32f_pct": {
   "column": "MLY-TMIN-PRBOCC-LSTH032",
   "absent": false,
   "comp_flags": [
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 },
 "citation": {
  "monthly": "Palecki, Michael; Durre, Imke; Applequist, Scott; Arguez, Anthony; Lawrimore, Jay (2021). U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991-2020). Station USW00003927 (DALLAS FT WORTH AP, TX US). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/wck8-er13. Accessed 2026-10-09.",
  "annual": "Palecki, Michael; Durre, Imke; Applequist, Scott; Arguez, Anthony; Lawrimore, Jay (2021). U.S. Climate Normals 2020: U.S. Annual/Seasonal Climate Normals (1991-2020). Station USW00003927 (DALLAS FT WORTH AP, TX US). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/4ek7-fk11. Accessed 2026-10-09.",
  "metadata_records": [
   "https://www.ncei.noaa.gov/access/metadata/landing-page/bin/iso?id=gov.noaa.ncdc:C01620",
   "https://www.ncei.noaa.gov/access/metadata/landing-page/bin/iso?id=gov.noaa.ncdc:C01619"
  ]
 },
 "retrieved": {
  "monthly": "2026-10-09",
  "annual": "2026-10-09"
 }
}