WeatherArchive / Climate averages / Houston
Houston weather by month: climate averages
Houston averages 70°F (21°C) over the year. August is warmest, with highs around 92°F (33°C); January is coldest, with lows near 46°F (8°C). About 54 inches (1372 mm) of precipitation falls on roughly 132 days a year, from 30 years of ERA5 data (1996–2025).
| Month | Avg high | Avg low | Precip. | Days ≥1 mm | Sunshine / day |
|---|---|---|---|---|---|
| January | 16.9°C | 7.5°C | 114.1 mm | 10.0 | 7.0 h |
| February | 18.8°C | 9.4°C | 87.2 mm | 9.4 | 7.2 h |
| March | 22.2°C | 12.8°C | 101.7 mm | 10.7 | 8.2 h |
| April | 25.7°C | 16.3°C | 106.1 mm | 9.5 | 9.7 h |
| May | 29.4°C | 20.6°C | 124.6 mm | 10.7 | 10.8 h |
| June | 32.0°C | 23.7°C | 127.6 mm | 13.5 | 11.5 h |
| July | 32.9°C | 24.5°C | 126.0 mm | 14.6 | 11.4 h |
| August | 33.5°C | 24.8°C | 111.4 mm | 13.9 | 11.4 h |
| September | 31.0°C | 22.3°C | 137.9 mm | 12.0 | 10.1 h |
| October | 27.1°C | 17.6°C | 114.6 mm | 8.9 | 9.3 h |
| November | 21.8°C | 12.6°C | 103.2 mm | 8.8 | 7.8 h |
| December | 18.1°C | 9.0°C | 118.0 mm | 10.1 | 6.8 h |
Record high 1996–2025: 41.7°C on 2000-09-04. Record low: -10.9°C on 2021-02-16.
Source: Open-Meteo Historical Weather API (CC BY 4.0). Values are ERA5 reanalysis model data on a ~9–25 km grid, not readings from a weather station, so a single town’s thermometer can differ by a few degrees and local showers can be missed. Grid cell 29.77, -95.33 at 20 m. For snowfall, humidity and a best-time-to-visit score, open Houston in the climate tool.
Houston weather month by month
The wettest month in Houston is September, averaging 5.4 in (138 mm); the driest is February at 3.4 in (87 mm). July has the most days with at least 1 mm of rain (about 15). June is the sunniest month, with about 11.5 hours of sunshine a day, against 6.8 hours in December. If you like average highs between 64 °F and 82 °F (18–28 °C) with few rainy days, aim for February, October and November.
Planning a particular day? See how often that date was wet or hot over 30 years with the event weather odds, or look up what the weather actually was on any past date in the historical weather archive.
Questions people ask
What is the warmest month in Houston?
August, with an average daily high of 92°F (33°C) over 1996–2025.
What is the coldest month in Houston?
January, when nights average about 46°F (8°C).
What is the rainiest month in Houston?
September has the most precipitation (about 5.4 in (138 mm)), and July has the most rainy days (about 15 days with 1 mm or more). The driest month is February.
How much sunshine does Houston get?
About 9.3 hours of bright sunshine a day averaged over the year, from 6.8 h in December to 11.5 h in June. Sunshine here is the model’s estimate of hours with direct sun, not hours of daylight.
What is the best month to visit Houston for mild weather?
By average high between 64 °F and 82 °F (18–28 °C) and the fewest rainy days: February, October, November. Prices, crowds and events are not included.