Brenham, Texas climate: Normal weather by month, frost dates and records
Brenham's normal year runs from 40°F January nights to 95°F August afternoons, with 48.0 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 20.0°C, January lows of 4°C, August highs of 35°C, 1,220 mm of precipitation a year.
- NOAA stationBrenham
- Station IDUSC00411048
- Location30.16°N 96.40°W
- Elevation313 ft (95 m)
- Population19,728
On October 11, the normal high in Brenham is 83°F and the normal low 60°F, and the chance of measurable rain or snow is 21%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Brenham.
- Jan 61° 40°
- Feb 64° 43°
- Mar 71° 49°
- Apr 78° 57°
- May 85° 65°
- Jun 91° 72°
- Jul 94° 74°
- Aug 95° 74°
- Sep 90° 68°
- Oct 81° 59°
- Nov 70° 48°
- Dec 63° 41°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Brenham each month?
August is the warmest month, with normal highs of 95°F; January the coldest, with normal lows of 40°F. The most precipitation falls in May (5.39 in), the least in July (2.58 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 61°F | 40°F | 50.2°F | 3.66 | 10 | <1 | 6 | 10 h 20 min |
| February | 64°F | 43°F | 53.7°F | 3.36 | 9 | <1 | 3 | 11 h 10 min |
| March | 71°F | 49°F | 60.1°F | 3.63 | 9 | <1 | 1 | 12 h |
| April | 78°F | 57°F | 67.4°F | 3.56 | 7 | 1 | <1 | 12 h 50 min |
| May | 85°F | 65°F | 74.9°F | 5.39 | 7 | 8 | <1 | 13 h 40 min |
| June | 91°F | 72°F | 81.2°F | 4.46 | 8 | 22 | <1 | 14 h |
| July | 94°F | 74°F | 83.8°F | 2.58 | 6 | 27 | <1 | 14 h |
| August | 95°F | 74°F | 84.4°F | 3.83 | 6 | 29 | <1 | 13 h 20 min |
| September | 90°F | 68°F | 79.1°F | 4.59 | 7 | 19 | <1 | 12 h 20 min |
| October | 81°F | 59°F | 69.9°F | 5.07 | 7 | 5 | <1 | 11 h 30 min |
| November | 70°F | 48°F | 59.1°F | 4.21 | 8 | <1 | 2 | 10 h 40 min |
| December | 63°F | 41°F | 51.9°F | 3.69 | 9 | <1 | 5 | 10 h 10 min |
| Year (annual) | 79°F | 57°F | 68.0°F | 48.03 | 91 | 112 | 18 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 16°C | 4°C | 10.1°C | 93 mm |
| February | 18°C | 6°C | 12.1°C | 85 mm |
| March | 22°C | 10°C | 15.6°C | 92 mm |
| April | 26°C | 14°C | 19.7°C | 90 mm |
| May | 29°C | 18°C | 23.8°C | 137 mm |
| June | 33°C | 22°C | 27.3°C | 113 mm |
| July | 34°C | 23°C | 28.8°C | 66 mm |
| August | 35°C | 23°C | 29.1°C | 97 mm |
| September | 32°C | 20°C | 26.2°C | 117 mm |
| October | 27°C | 15°C | 21.1°C | 129 mm |
| November | 21°C | 9°C | 15.1°C | 107 mm |
| December | 17°C | 5°C | 11.1°C | 94 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00411048; 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.
When is the best weather to visit Brenham?
Normal highs sit between 65°F and 85°F in March, April, May, October and November. Of those, October has the fewest days with rain (7).
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 USC00411048.
When is the last frost in Brenham?
In Brenham, the last spring frost (32°F) comes after March 2 in half of years and after March 20 in one year in ten; the first autumn frost comes before November 30 in half of years and before November 8 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
- March 21 year in 10 after March 20; 9 in 10 after January 31
- First autumn frost, half of years before
- November 301 year in 10 before November 8; 9 in 10 before December 23
NOAA puts the median frost-free season at 273 days, and the season without a hard freeze (28°F) at 307 days.
A hard freeze (28°F) comes after February 10 in half of springs and before December 18 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Brenham in zone 9a in ZIP code 77833, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Brenham's NOAA station is in zone 9a: the coldest night of a typical year reaches 23°F (29 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 USC00411048; 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 in Brenham?
In a normal year in Brenham, 112 days a year reach 90°F (13 of them 100°F or more), 18 nights fall to 32°F or colder and 91 days bring measurable precipitation.
- Days at 90°F or more
- 112a normal year
- Days at 100°F or more
- 13a normal year
- Nights at 32°F or colder
- 18a normal year
- Days that stay below freezing
- 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 91a normal year
The highest temperature in this station's record (since 1897) is 113°F, on September 5, 2000; the lowest is −2°F, on January 19, 1930.
The wettest calendar year on that record is 1919, with 66.39 in; the snowiest season is 1948–49, with 8.7 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00411048; records: ACIS (NOAA Regional Climate Centers), station USC00411048. Records use complete months only; a month missing more than three days is left out.
How sunny is Brenham?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Brenham, 4.7 kWh per square metre a day. August is the sunniest month (87%) and February the cloudiest (66%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 72% | 2.9 |
| February | 66% | 3.4 |
| March | 71% | 4.5 |
| April | 75% | 5.4 |
| May | 77% | 5.9 |
| June | 84% | 6.6 |
| July | 86% | 6.6 |
| August | 87% | 6.2 |
| September | 82% | 5.2 |
| October | 81% | 4.3 |
| November | 76% | 3.2 |
| December | 71% | 2.6 |
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 much heating and cooling does Brenham need?
A normal year in Brenham brings 1,738 heating degree days, 68% fewer than the median U.S. place (5,373), and 2,852 cooling degree days, 3.1 times the median (908). Three months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 6,914 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 467 | 8 |
| February | 330 | 14 |
| March | 196 | 45 |
| April | 55 | 126 |
| May | 5 | 312 |
| June | 0 | 487 |
| July | 0 | 581 |
| August | 0 | 600 |
| September | 1 | 424 |
| October | 44 | 197 |
| November | 221 | 45 |
| December | 419 | 13 |
| Year (annual) | 1,738 | 2,852 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00411048. 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.
Has Brenham been warmer than normal lately?
2025 averaged 71.1°F, 3.1°F above the 1991-2020 normal of 68.0°F.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2025 | 71.1°F | +3.1°F | 36.24 |
Over 104 complete years from 1889 to 2025, the station's annual mean temperature rose at a fitted 0.5°F per century (+0.03°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00411048; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Brenham's climate compare?
Brenham is warmer than 220 of the other 320 places with their own NOAA record in Texas, and wetter than 270. Across the 7,247 U.S. stations with normals, its annual mean of 68.0°F is warmer than 93%.
In the Köppen classification computed from these normals, Brenham 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.
Which places near Brenham share this climate record?
Industry has no NOAA station with 1991-2020 normals of its own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Industry, TX290 people · 15 mi SW
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Brenham's climate
What is the coldest month in Brenham?
January, with a normal high of 61°F and a normal low of 40°F. The warmest is August (95°F by day, 74°F at night).
What is the rainiest month in Brenham?
May, with 5.39 in of precipitation in a normal year; the driest is July with 2.58 in.
What plant hardiness zone is Brenham in?
The USDA's 2023 map puts Brenham in zone 9a in ZIP code 77833, the nearest ZIP area. By the same method at Brenham's NOAA station, the coldest night of a typical year reaches 23°F (29 years, 1991-2020): zone 9a.
How late can frost come in Brenham?
In half of years the last 32°F night comes after March 2; in one year in ten it comes after March 20. Waiting until March 20 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Texas climateThe statewide normals and every place in the state
- Bellville, TX14 miles from this station, 68.8°F a year
- Somerville, TX15 miles from this station, 67.0°F a year
- Washington State Park, TX18 miles from this station, 68.0°F a year
- College Station, TX30 miles from this station, 69.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made