Brenham weather in September
In September, Brenham sees average daytime highs of 90°F and overnight lows near 71°F, with 3.1 in of rain across 8.4 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.
Highs ease over the month, from about 92°F in the first days to 87°F by the end. The sky is clear or mostly clear about 50% of the time in September, and the air most often feels oppressive.
Daylight stretches from about 12 h 36 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Brenham's 2nd-clearest and 11th-windiest month. For the whole year in context, see Brenham's year-round climate.
- Daytime high
- 90°
- 4th warmest
- Overnight low
- 71°
- 9th coldest
- Rainfall
- 3.1 in
- 8.4 wet days
- Daylight
- 12 h 12 min
- 6:15 AM – 6:25 PM
- Cloud cover
- 45%
- 2nd clearest
- Wind
- 7 mph
- 11th windiest
- Solar energy
- 5.12 kWh/m²
- Travel score
- 4.3
- out of 10
Brenham is city and county seat of Washington County, Texas, United States.
- Density
- 497/km²
- people per km²
- Founded
- 1844
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Highs ease over the month, from about 92°F in the first days to 87°F by the end.
A typical September day in Brenham reaches about 90°F in the afternoon and slips back to 71°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 82°F and 96°F. Set against its neighbours, September runs about 5°F cooler than August and about 8°F warmer than October.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 93 | 92 | 92 | 92 | 92 | 92 | 91 | 91 | 91 | 91 | 91 | 90 | 90 | 90 | 90 | 89 | 89 | 89 | 89 | 89 | 88 | 88 | 88 | 88 | 87 | 87 | 87 | 87 | 87 | 86 |
| Avg low (°F) | 74 | 74 | 74 | 74 | 74 | 73 | 73 | 73 | 73 | 73 | 72 | 72 | 72 | 72 | 71 | 71 | 71 | 70 | 70 | 70 | 69 | 69 | 69 | 68 | 68 | 67 | 67 | 67 | 67 | 66 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 93 | 74 |
| 2 | 92 | 74 |
| 3 | 92 | 74 |
| 4 | 92 | 74 |
| 5 | 92 | 74 |
| 6 | 92 | 73 |
| 7 | 91 | 73 |
| 8 | 91 | 73 |
| 9 | 91 | 73 |
| 10 | 91 | 73 |
| 11 | 91 | 72 |
| 12 | 90 | 72 |
| 13 | 90 | 72 |
| 14 | 90 | 72 |
| 15 | 90 | 71 |
| 16 | 89 | 71 |
| 17 | 89 | 71 |
| 18 | 89 | 70 |
| 19 | 89 | 70 |
| 20 | 89 | 70 |
| 21 | 88 | 69 |
| 22 | 88 | 69 |
| 23 | 88 | 69 |
| 24 | 88 | 68 |
| 25 | 87 | 68 |
| 26 | 87 | 67 |
| 27 | 87 | 67 |
| 28 | 87 | 67 |
| 29 | 87 | 67 |
| 30 | 86 | 66 |
How September really feels in Brenham
Once humidity and wind are folded in, September averages 22 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Brenham weather by month
How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 62° / 43° | 3.2 | 8.6 | 10.3 | 5.4 |
| Feb | 65° / 46° | 2.7 | 8.4 | 10.9 | 6.1 |
| Mar | 72° / 53° | 3.2 | 8.5 | 11.8 | 6.9 |
| Apr | 78° / 59° | 3.4 | 8 | 12.7 | 7.0 |
| May | 86° / 67° | 4.1 | 9.7 | 13.5 | 5.2 |
| Jun | 91° / 74° | 3.3 | 10 | 13.9 | 3.7 |
| Jul | 94° / 76° | 1.9 | 7.3 | 13.7 | 3.0 |
| Aug | 95° / 76° | 2.7 | 7.5 | 13.1 | 2.7 |
| Sep | 90° / 71° | 3.1 | 8.4 | 12.2 | 4.3 |
| Oct | 81° / 61° | 3.6 | 7.2 | 11.3 | 6.9 |
| Nov | 71° / 51° | 3.3 | 7.9 | 10.5 | 7.1 |
| Dec | 63° / 45° | 3.6 | 8.7 | 10.1 | 5.8 |
Cloud cover in September
The sky is clear or mostly clear about 50% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 35%. Skies tend to open up as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 63 | 63 | 63 | 63 | 62 | 62 | 63 | 62 | 61 | 61 | 61 | 61 | 61 | 61 | 61 | 62 | 62 | 63 | 64 | 65 | 66 | 68 | 69 | 70 | 72 | 73 | 73 | 75 | 75 | 75 |
| Cloudier (%) | 37 | 37 | 37 | 37 | 38 | 38 | 37 | 38 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 38 | 38 | 37 | 36 | 35 | 34 | 32 | 31 | 30 | 28 | 27 | 27 | 25 | 25 | 25 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 63 | 37 |
| 2 | 63 | 37 |
| 3 | 63 | 37 |
| 4 | 63 | 37 |
| 5 | 62 | 38 |
| 6 | 62 | 38 |
| 7 | 63 | 37 |
| 8 | 62 | 38 |
| 9 | 61 | 39 |
| 10 | 61 | 39 |
| 11 | 61 | 39 |
| 12 | 61 | 39 |
| 13 | 61 | 39 |
| 14 | 61 | 39 |
| 15 | 61 | 39 |
| 16 | 62 | 38 |
| 17 | 62 | 38 |
| 18 | 63 | 37 |
| 19 | 64 | 36 |
| 20 | 65 | 35 |
| 21 | 66 | 34 |
| 22 | 68 | 32 |
| 23 | 69 | 31 |
| 24 | 70 | 30 |
| 25 | 72 | 28 |
| 26 | 73 | 27 |
| 27 | 73 | 27 |
| 28 | 75 | 25 |
| 29 | 75 | 25 |
| 30 | 75 | 25 |
Chance of precipitation in September
Brenham gets around 3.1 in of rain over 8.4 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 28% and peaks near 32% on the wettest days. The odds ease toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 29 | 30 | 30 | 31 | 31 | 31 | 32 | 32 | 32 | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 29 | 28 | 28 | 27 | 26 | 25 | 24 | 24 | 23 | 22 | 22 | 22 | 21 | 21 |
| Rain chance (%) | |
|---|---|
| 1 | 29 |
| 2 | 30 |
| 3 | 30 |
| 4 | 31 |
| 5 | 31 |
| 6 | 31 |
| 7 | 32 |
| 8 | 32 |
| 9 | 32 |
| 10 | 31 |
| 11 | 31 |
| 12 | 31 |
| 13 | 31 |
| 14 | 30 |
| 15 | 30 |
| 16 | 30 |
| 17 | 29 |
| 18 | 28 |
| 19 | 28 |
| 20 | 27 |
| 21 | 26 |
| 22 | 25 |
| 23 | 24 |
| 24 | 24 |
| 25 | 23 |
| 26 | 22 |
| 27 | 22 |
| 28 | 22 |
| 29 | 21 |
| 30 | 21 |
Humidity in September
Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the oppressive band about 41% of days. Sticky, muggy-or-worse air turns up on roughly 70% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 15 | 16 | 18 | 19 | 20 | 21 | 22 | 24 |
| Comfortable (%) | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 9 | 10 | 10 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 11 | 11 |
| Humid (%) | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 12 | 12 | 13 | 13 | 13 | 14 | 14 | 14 | 15 | 15 | 15 | 16 | 16 |
| Muggy (%) | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 |
| Oppressive (%) | 52 | 52 | 51 | 51 | 50 | 49 | 49 | 48 | 48 | 48 | 47 | 47 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 39 | 37 | 35 | 33 | 32 | 30 | 28 | 27 | 25 | 24 | 23 |
| Miserable (%) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 2 | 4 | 11 | 27 | 52 | 4 |
| 2 | 2 | 4 | 11 | 27 | 52 | 4 |
| 3 | 3 | 4 | 11 | 27 | 51 | 4 |
| 4 | 3 | 4 | 11 | 27 | 51 | 4 |
| 5 | 3 | 4 | 11 | 28 | 50 | 4 |
| 6 | 4 | 5 | 11 | 28 | 49 | 4 |
| 7 | 4 | 5 | 11 | 28 | 49 | 4 |
| 8 | 5 | 5 | 11 | 28 | 48 | 3 |
| 9 | 5 | 5 | 11 | 28 | 48 | 3 |
| 10 | 5 | 5 | 10 | 28 | 48 | 3 |
| 11 | 6 | 6 | 10 | 28 | 47 | 3 |
| 12 | 6 | 6 | 10 | 28 | 47 | 3 |
| 13 | 6 | 7 | 10 | 27 | 47 | 3 |
| 14 | 7 | 7 | 11 | 27 | 46 | 3 |
| 15 | 7 | 8 | 11 | 27 | 45 | 3 |
| 16 | 7 | 8 | 11 | 26 | 44 | 3 |
| 17 | 8 | 9 | 11 | 26 | 43 | 3 |
| 18 | 9 | 9 | 12 | 26 | 42 | 3 |
| 19 | 10 | 10 | 12 | 25 | 41 | 3 |
| 20 | 11 | 10 | 13 | 25 | 39 | 2 |
| 21 | 12 | 11 | 13 | 25 | 37 | 2 |
| 22 | 13 | 11 | 13 | 25 | 35 | 2 |
| 23 | 15 | 11 | 14 | 24 | 33 | 2 |
| 24 | 16 | 12 | 14 | 24 | 32 | 2 |
| 25 | 18 | 12 | 14 | 24 | 30 | 2 |
| 26 | 19 | 12 | 15 | 24 | 28 | 2 |
| 27 | 20 | 12 | 15 | 25 | 27 | 2 |
| 28 | 21 | 12 | 15 | 25 | 25 | 2 |
| 29 | 22 | 11 | 16 | 25 | 24 | 2 |
| 30 | 24 | 11 | 16 | 25 | 23 | 1 |
Wind in September
Winds average 7 mph in September.
Across September, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 6 | calm |
| 2 | 6 | calm |
| 3 | 6 | calm |
| 4 | 6 | calm |
| 5 | 6 | calm |
| 6 | 6 | calm |
| 7 | 6 | calm |
| 8 | 6 | calm |
| 9 | 6 | calm |
| 10 | 6 | calm |
| 11 | 6 | calm |
| 12 | 7 | calm |
| 13 | 7 | calm |
| 14 | 7 | calm |
| 15 | 7 | calm |
| 16 | 7 | calm |
| 17 | 7 | calm |
| 18 | 7 | calm |
| 19 | 7 | calm |
| 20 | 7 | calm |
| 21 | 7 | calm |
| 22 | 7 | calm |
| 23 | 7 | calm |
| 24 | 7 | calm |
| 25 | 7 | calm |
| 26 | 7 | calm |
| 27 | 7 | calm |
| 28 | 7 | calm |
| 29 | 7 | calm |
| 30 | 7 | calm |
Sunrise & sunset in September
Daylight runs from about 12 h 36 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 54 minutes over September. Sunrise moves from 6:06 AM to 6:23 AM, and sunset from 6:45 PM to 6:07 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.6 | 12.6 | 12.6 | 12.5 | 12.5 | 12.5 | 12.5 | 12.4 | 12.4 | 12.4 | 12.3 | 12.3 | 12.3 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12.1 | 12.0 | 12.0 | 12.0 | 11.9 | 11.9 | 11.9 | 11.8 | 11.8 | 11.8 | 11.7 |
| Sunrise (AM) | 6:06 | 6:07 | 6:07 | 6:08 | 6:08 | 6:09 | 6:09 | 6:10 | 6:11 | 6:11 | 6:12 | 6:12 | 6:13 | 6:13 | 6:14 | 6:15 | 6:15 | 6:16 | 6:16 | 6:17 | 6:17 | 6:18 | 6:19 | 6:19 | 6:20 | 6:20 | 6:21 | 6:21 | 6:22 | 6:23 |
| Sunset (PM) | 6:45 | 6:43 | 6:42 | 6:41 | 6:40 | 6:38 | 6:37 | 6:36 | 6:34 | 6:33 | 6:32 | 6:31 | 6:29 | 6:28 | 6:27 | 6:25 | 6:24 | 6:23 | 6:21 | 6:20 | 6:19 | 6:17 | 6:16 | 6:15 | 6:14 | 6:12 | 6:11 | 6:10 | 6:08 | 6:07 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.6 | 6:06 | 6:45 |
| 2 | 12.6 | 6:07 | 6:43 |
| 3 | 12.6 | 6:07 | 6:42 |
| 4 | 12.5 | 6:08 | 6:41 |
| 5 | 12.5 | 6:08 | 6:40 |
| 6 | 12.5 | 6:09 | 6:38 |
| 7 | 12.5 | 6:09 | 6:37 |
| 8 | 12.4 | 6:10 | 6:36 |
| 9 | 12.4 | 6:11 | 6:34 |
| 10 | 12.4 | 6:11 | 6:33 |
| 11 | 12.3 | 6:12 | 6:32 |
| 12 | 12.3 | 6:12 | 6:31 |
| 13 | 12.3 | 6:13 | 6:29 |
| 14 | 12.2 | 6:13 | 6:28 |
| 15 | 12.2 | 6:14 | 6:27 |
| 16 | 12.2 | 6:15 | 6:25 |
| 17 | 12.1 | 6:15 | 6:24 |
| 18 | 12.1 | 6:16 | 6:23 |
| 19 | 12.1 | 6:16 | 6:21 |
| 20 | 12.1 | 6:17 | 6:20 |
| 21 | 12.0 | 6:17 | 6:19 |
| 22 | 12.0 | 6:18 | 6:17 |
| 23 | 12.0 | 6:19 | 6:16 |
| 24 | 11.9 | 6:19 | 6:15 |
| 25 | 11.9 | 6:20 | 6:14 |
| 26 | 11.9 | 6:20 | 6:12 |
| 27 | 11.8 | 6:21 | 6:11 |
| 28 | 11.8 | 6:21 | 6:10 |
| 29 | 11.8 | 6:22 | 6:08 |
| 30 | 11.7 | 6:23 | 6:07 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 5.12 kWh/m².
For context, solar energy here swings from a low near 2.61 kWh/m² to a high of 6.52 kWh/m² in July across the year — September's 5.12 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.5 | 5.5 | 5.4 | 5.4 | 5.4 | 5.3 | 5.3 | 5.3 | 5.2 | 5.2 | 5.2 | 5.1 | 5.1 | 5.1 | 5.1 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 4.9 | 4.9 | 4.9 | 4.9 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.5 | Bright |
| 2 | 5.5 | Bright |
| 3 | 5.4 | Bright |
| 4 | 5.4 | Bright |
| 5 | 5.4 | Bright |
| 6 | 5.3 | Bright |
| 7 | 5.3 | Bright |
| 8 | 5.3 | Bright |
| 9 | 5.2 | Bright |
| 10 | 5.2 | Bright |
| 11 | 5.2 | Bright |
| 12 | 5.1 | Bright |
| 13 | 5.1 | Bright |
| 14 | 5.1 | Bright |
| 15 | 5.1 | Bright |
| 16 | 5.0 | Bright |
| 17 | 5.0 | Bright |
| 18 | 5.0 | Bright |
| 19 | 5.0 | Bright |
| 20 | 5.0 | Bright |
| 21 | 5.0 | Bright |
| 22 | 5.0 | Bright |
| 23 | 5.0 | Bright |
| 24 | 5.0 | Bright |
| 25 | 5.0 | Bright |
| 26 | 5.0 | Bright |
| 27 | 4.9 | Bright |
| 28 | 4.9 | Bright |
| 29 | 4.9 | Bright |
| 30 | 4.9 | Bright |
Is September a good time to visit Brenham?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a reasonable time to visit Brenham for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Brenham in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Brenham sees daytime highs around 90°F and nights near 71°F. Pack light clothes. Worth having: rain gear and sun protection. About 8 days see rain.
UV index in Brenham in September
Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Brenham peaks around July 24 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 4 | 6 | 7 | 10 | 10 | 10 | 11 | 11 | 8 | 6 | 5 | 4 |
| Level | Moderate | High | High | Very high | Extreme | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 6 | High |
| Mar | 7 | High |
| Apr | 10 | Very high |
| May | 10 | Extreme |
| Jun | 10 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 5 | Moderate |
| Dec | 4 | Moderate |
Air quality in Brenham in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Brenham is worst in July — around 19 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (November, 7 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 7 | 8 | 10 | 11 | 15 | 16 | 19 | 14 | 11 | 7 | 7 | 7 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 7 | Good |
| Feb | 8 | Good |
| Mar | 10 | Good |
| Apr | 11 | Good |
| May | 15 | Moderate |
| Jun | 16 | Moderate |
| Jul | 19 | Moderate |
| Aug | 14 | Moderate |
| Sep | 11 | Good |
| Oct | 7 | Good |
| Nov | 7 | Good |
| Dec | 7 | Good |
Where is Brenham?
Brenham sits at 30.2°N, 96.4°W, 341 ft above sea level, in United States. The nearest listed city is College Station, 32 mi away.
Topography around Brenham
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Brenham.
Within 2 miles, the terrain around Brenham has only modest variations in elevation — a maximum elevation change of 210 ft around an average of 325 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 361 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 682 ft.
The land around Brenham is covered by grassland (42%), trees (33%) and artificial surfaces (22%) within 2 miles, grassland (74%) and trees (23%) within 10 miles, and grassland (54%) and trees (37%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Brenham (30.1669°, -96.3977°, elevation 341 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).