Houston climate
Houston is warmest in August, with average highs of 33 °C, and coldest in January, when nights average 8.1 °C. September is the wettest month (129 mm) and February the driest (92 mm). Figures are 1991–2020 climate normals.
Across a full year Houston averages 1,281 mm of rain, 215 days above 25 °C and 4 days below freezing.
United States · 12 m elevation · population 2,314,157 · 1991–2020 normals
Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month
- Warmest month August 33 °C
- Coldest month January 8.1 °C
- Driest month February 92 mm
- Wettest month September 129 mm
- Least cloud October 40 % cloud
- Hottest on record September 42 °C
- Coldest on record January -7.3 °C
What to expectHouston through the year
Houston has a clear annual cycle: average daily highs run from 17 °C in January to 33 °C in August, a swing of 17 °C in mean temperature across the year.
Counted across a normal year, 215 days a year reach 25 °C, 119 of them reach 30 °C, 4 nights drop below freezing. The warmest reading in the 1991–2020 record is 42 °C, in September.
Rain is spread fairly evenly through the year, from 92 mm in February to 129 mm in September. There is no dry season to aim for.
Month by month
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 17.3 °C | 107 mm | 58 % |
| February | 19.3 °C | 92 mm | 62 % |
| March | 22.4 °C | 98 mm | 59 % |
| April | 25.7 °C | 105 mm | 56 % |
| May | 29.3 °C | 101 mm | 55 % |
| June | 31.9 °C | 121 mm | 49 % |
| July | 32.9 °C | 96 mm | 51 % |
| August | 33.4 °C | 104 mm | 49 % |
| September | 30.9 °C | 129 mm | 46 % |
| October | 27.1 °C | 110 mm | 40 % |
| November | 21.8 °C | 106 mm | 50 % |
| December | 18.1 °C | 112 mm | 59 % |
Temperature month by month
| Month | Avg high | Avg low | Mean | Record high | Record low | Days above 25 °C | Days above 30 °C | Days below 0 °C |
|---|---|---|---|---|---|---|---|---|
| January | 17.3 °C | 8.1 °C | 12.0 °C | 26.2 °C | -7.3 °C | 0 | 0 | 2 |
| February | 19.3 °C | 9.8 °C | 13.8 °C | 28.9 °C | -4.7 °C | 2 | 0 | 1 |
| March | 22.4 °C | 12.9 °C | 17.0 °C | 31.2 °C | -3.8 °C | 8 | 0 | 0 |
| April | 25.7 °C | 16.3 °C | 20.5 °C | 33.8 °C | 3.3 °C | 19 | 2 | 0 |
| May | 29.3 °C | 20.5 °C | 24.4 °C | 35.8 °C | 7.8 °C | 30 | 12 | 0 |
| June | 31.9 °C | 23.6 °C | 27.3 °C | 40.3 °C | 15.7 °C | 30 | 24 | 0 |
| July | 32.9 °C | 24.5 °C | 28.3 °C | 38.6 °C | 18.9 °C | 31 | 28 | 0 |
| August | 33.4 °C | 24.6 °C | 28.6 °C | 40.2 °C | 18.1 °C | 31 | 29 | 0 |
| September | 30.9 °C | 22.3 °C | 26.1 °C | 41.8 °C | 11.8 °C | 29 | 20 | 0 |
| October | 27.1 °C | 17.7 °C | 21.9 °C | 33.9 °C | 1.7 °C | 24 | 6 | 0 |
| November | 21.8 °C | 12.7 °C | 16.6 °C | 30.0 °C | -1.9 °C | 8 | 0 | 0 |
| December | 18.1 °C | 9.3 °C | 13.1 °C | 27.7 °C | -5.1 °C | 2 | 0 | 0 |
Rain, sun and wind month by month
| Month | Rainfall | Wet days | Daylight | Cloud cover | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 107 mm | 10 | 10 h/day | 58 % | 74 % | 20 km/h |
| February | 92 mm | 9 | 11 h/day | 62 % | 76 % | 21 km/h |
| March | 98 mm | 10 | 12 h/day | 59 % | 76 % | 21 km/h |
| April | 105 mm | 9 | 13 h/day | 56 % | 75 % | 22 km/h |
| May | 101 mm | 10 | 14 h/day | 55 % | 76 % | 20 km/h |
| June | 121 mm | 13 | 14 h/day | 49 % | 76 % | 17 km/h |
| July | 96 mm | 13 | 14 h/day | 51 % | 76 % | 15 km/h |
| August | 104 mm | 14 | 13 h/day | 49 % | 74 % | 15 km/h |
| September | 129 mm | 12 | 12 h/day | 46 % | 74 % | 15 km/h |
| October | 110 mm | 9 | 11 h/day | 40 % | 72 % | 17 km/h |
| November | 106 mm | 8 | 11 h/day | 50 % | 74 % | 18 km/h |
| December | 112 mm | 9 | 10 h/day | 59 % | 75 % | 19 km/h |
Where Houston ranks
| Ranking | Position | Value |
|---|---|---|
| The warmest places in North America in August | 46thof 50 | 33 °C |
Planning a trip? See the best time to visit Houston.
QuestionsCommon questions about Houston’s climate
When is the best time to visit Houston?
That depends on what you want, so the honest answer is a comparison rather than a single month. March, April, October sit closest to 20 °C on average, August is the warmest month and February the driest. The month-by-month table above has the full picture.
How hot does Houston get?
In August, the warmest month, daily highs average 33 °C. About 119 days a year pass 30 °C. The highest value in the 1991–2020 record is 42 °C.
How cold does it get in winter?
Nights average 8.1 °C in January, the coldest month. A normal year has 4 nights below freezing.
Which month is wettest in Houston?
September, averaging 129 mm over 12 days with rain. The driest month is February with 92 mm. The year as a whole averages 1,281 mm.
Are these figures a forecast?
No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Houston rather than what any particular week will bring. Individual years can differ substantially from the normal.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.