Calliham, Texas climate: Climate normals at a NOAA weather station
Calliham's normal year runs from 43°F January nights to 99°F August afternoons, with 25.6 inches of precipitation and less than an inch of snow (0.3 in) a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 22.1°C, January lows of 6°C, August highs of 37°C, 650 mm of precipitation a year.
- NOAA stationCalliham
- Station IDUSC00411337
- Location28.47°N 98.35°W
- Elevation218 ft (66 m)
On October 12, the normal high in Calliham is 88°F and the normal low 63°F, and the chance of measurable rain or snow is 16%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Calliham.
- Jan 67° 43°
- Feb 71° 47°
- Mar 77° 54°
- Apr 84° 60°
- May 90° 68°
- Jun 95° 73°
- Jul 98° 74°
- Aug 99° 74°
- Sep 92° 70°
- Oct 86° 62°
- Nov 76° 52°
- Dec 69° 44°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Calliham each month?
August is the warmest month, with normal highs of 99°F; January the coldest, with normal lows of 43°F. The most precipitation falls in September (3.55 in), the least in December (1.31 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 67°F | 43°F | 54.8°F | 1.42 | 5 | <1 | 3 | 10 h 30 min |
| February | 71°F | 47°F | 59.0°F | 1.35 | 5 | 1 | 2 | 11 h 10 min |
| March | 77°F | 54°F | 65.3°F | 2.15 | 5 | 2 | <1 | 12 h |
| April | 84°F | 60°F | 71.9°F | 2.57 | 5 | 7 | <1 | 12 h 50 min |
| May | 90°F | 68°F | 78.7°F | 3.03 | 6 | 18 | <1 | 13 h 30 min |
| June | 95°F | 73°F | 83.9°F | 2.45 | 4 | 28 | <1 | 14 h |
| July | 98°F | 74°F | 85.7°F | 2.36 | 4 | 29 | <1 | 13 h 50 min |
| August | 99°F | 74°F | 86.2°F | 1.77 | 3 | 30 | <1 | 13 h 10 min |
| September | 92°F | 70°F | 81.2°F | 3.55 | 6 | 23 | <1 | 12 h 20 min |
| October | 86°F | 62°F | 73.9°F | 2.22 | 5 | 11 | <1 | 11 h 30 min |
| November | 76°F | 52°F | 63.9°F | 1.42 | 4 | 1 | <1 | 10 h 50 min |
| December | 69°F | 44°F | 56.5°F | 1.31 | 5 | <1 | 2 | 10 h 20 min |
| Year (annual) | 84°F | 60°F | 71.8°F | 25.60 | 57 | 148 | 8 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 19°C | 6°C | 12.7°C | 36 mm |
| February | 22°C | 8°C | 15.0°C | 34 mm |
| March | 25°C | 12°C | 18.5°C | 55 mm |
| April | 29°C | 15°C | 22.2°C | 65 mm |
| May | 32°C | 20°C | 25.9°C | 77 mm |
| June | 35°C | 23°C | 28.8°C | 62 mm |
| July | 37°C | 23°C | 29.8°C | 60 mm |
| August | 37°C | 23°C | 30.1°C | 45 mm |
| September | 34°C | 21°C | 27.3°C | 90 mm |
| October | 30°C | 17°C | 23.3°C | 56 mm |
| November | 24°C | 11°C | 17.7°C | 36 mm |
| December | 20°C | 7°C | 13.6°C | 33 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00411337; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at Calliham?
Normal highs sit between 65°F and 85°F in January, February, March, April, November and December. Of those, November has the fewest days with rain (4).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00411337.
When is the last frost at Calliham?
In Calliham, the last spring frost (32°F) comes after February 9 in half of years and after March 7 in one year in ten; the first autumn frost comes before December 8 in half of years and before November 16 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- February 91 year in 10 after March 7; 9 in 10 after January 9
- First autumn frost, half of years before
- December 81 year in 10 before November 16; 9 in 10 before January 5
NOAA puts the median frost-free season at 303 days, and the season without a hard freeze (28°F) at 338 days.
A hard freeze (28°F) comes after January 23 in half of springs and before December 24 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Calliham in zone 9b in ZIP code 78007, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 9b: the coldest night of a typical year reaches 27°F (19 complete years).
Frost dates for every NOAA station in Texas · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00411337; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get at Calliham?
In a normal year in Calliham, 148 days a year reach 90°F (40 of them 100°F or more), 8 nights fall to 32°F or colder and 57 days bring measurable precipitation.
- Days at 90°F or more
- 148a normal year
- Days at 100°F or more
- 40a normal year
- Nights at 32°F or colder
- 8a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 57a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00411337.
How sunny is it at Calliham?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds at Calliham, 4.9 kWh per square metre a day. August is the sunniest month (89%) and February the cloudiest (69%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 71% | 3.1 |
| February | 69% | 3.6 |
| March | 72% | 4.6 |
| April | 76% | 5.4 |
| May | 80% | 6.0 |
| June | 86% | 6.8 |
| July | 87% | 6.7 |
| August | 89% | 6.5 |
| September | 82% | 5.3 |
| October | 83% | 4.6 |
| November | 77% | 3.4 |
| December | 71% | 2.8 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does Calliham record?
A normal year at Calliham brings 1,106 heating degree days, 79% fewer than the median U.S. place (5,373), and 3,593 cooling degree days, 4.0 times the median (908). One month needs 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 8,102 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 337 | 21 |
| February | 210 | 44 |
| March | 100 | 110 |
| April | 21 | 228 |
| May | 2 | 425 |
| June | 0 | 567 |
| July | 0 | 642 |
| August | 0 | 659 |
| September | 0 | 485 |
| October | 17 | 293 |
| November | 126 | 93 |
| December | 292 | 29 |
| Year (annual) | 1,106 | 3,593 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00411337. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Have recent years at Calliham been warmer than normal?
2025 averaged 73.7°F, 1.9°F above the 1991-2020 normal of 71.8°F. 3 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 71.7°F | −0.1°F | 34.92 |
| 2022 | 71.9°F | +0.1°F | 17.48 |
| 2023 | 73.8°F | +2.0°F | 21.77 |
| 2025 | 73.7°F | +1.9°F | 13.59 |
Source: observed years: ACIS, station USC00411337. A year counts only with all twelve months complete.
How does Calliham's climate compare?
Calliham is warmer than 286 of the 321 places with their own NOAA record in Texas, and wetter than 118. Across the 7,247 U.S. stations with normals, its annual mean of 71.8°F is warmer than 97%.
In the Köppen classification computed from these normals, Calliham is Cfa: temperate, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Questions about Calliham's climate
What is the coldest month at Calliham?
January, with a normal high of 67°F and a normal low of 43°F. The warmest is August (99°F by day, 74°F at night).
Does it snow at Calliham?
Rarely: NOAA's normal is 0.3 inch a year.
What is the rainiest month at Calliham?
September, with 3.55 in of precipitation in a normal year; the driest is December with 1.31 in.
What plant hardiness zone is Calliham in?
The USDA's 2023 map puts Calliham in zone 9b in ZIP code 78007, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 27°F (19 years, 1991-2020): zone 9b.
How late can frost come at Calliham?
In half of years the last 32°F night comes after February 9; in one year in ten it comes after March 7. Waiting until March 7 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Texas climateThe statewide normals and every place in the state
- Choke Canyon Dam, TX6 miles from this station, 70.5°F a year
- Tilden, TX11 miles from this station, 71.8°F a year
- Cross, TX15 miles from this station, 70.8°F a year
- Fowlerton, TX30 miles from this station, 71.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made