South Houston, TX climate
South Houston has warm winters and hot summers, with plenty of rain. A typical July afternoon reaches 93°, a January night drops to 45°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in South Houston feels like
Winter
Spring
Summer
Fall
South Houston weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 64° | 45° | 4.2" | 0 | 8 | 0 | 49° – 61° |
| February | 67° | 49° | 2.9" | 0 | 7 | 0 | 49° – 66° |
| March | 73° | 55° | 3.5" | 0 | 7 | 0 | 58° – 71° |
| April | 79° | 60° | 4.0" | 0 | 5 | 0 | 65° – 74° |
| May | 85° | 68° | 5.2" | 0 | 6 | 0 | 73° – 80° |
| June | 90° | 74° | 5.5" | 0 | 10 | 0 | 79° – 85° |
| July | 93° | 75° | 4.4" | 0 | 8 | 0 | 81° – 86° |
| August | 93° | 75° | 5.2" | 0 | 8 | 0 | 80° – 89° |
| September | 89° | 71° | 5.7" | 0 | 8 | 0 | 77° – 84° |
| October | 82° | 62° | 5.2" | 0 | 6 | 0 | 68° – 77° |
| November | 72° | 53° | 4.2" | 0 | 6 | 0 | 57° – 68° |
| December | 65° | 47° | 4.3" | 0 | 8 | 0 | 49° – 61° |
| Year | 79° | 61° | 54.2" | 0.0" | 86 | 0 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in South Houston
South Houston gets 54 inches of rain and melted snow a year. September is the wettest month and February the driest. Rain or snow falls on about 86 days a year.
A year-round growing season
Heating and cooling a home in South Houston
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In South Houston, 25% of that work is heating and 75% is cooling, so air conditioning is the bigger bill.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
South Houston and its neighbors
South Houston borders 2 towns with climate data. January nights across them vary by 0.7°. Houston has both the coldest January nights (44°) and the hottest July afternoons (94°). South Houston’s January low is 45° and its July high 93°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How South Houston compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in South Houston averaged 1.4° warmer than the 1900s. The biggest change is in February (+2.6°). The shift is larger than in 66% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at South Houston’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 49° to 66°. July is the most reliable, staying within 5°.
Common questions about South Houston’s climate
What is the coldest month in South Houston?
January, with a typical high of 64° and a low of 45°.
What is the hottest month in South Houston?
August, with a typical high of 93° and a low of 75°. About 101 days a year reach 90°.
How much snow does South Houston get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in South Houston?
Frost is uncommon. Only 86% of years see a night at 32° or below.
What is the rainiest month in South Houston?
September, with 5.7 inches of rain and melted snow. The year totals 54 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for South Houston itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Houston Deer Park, TX (7 mi, snow) and Houston Hobby Airport, TX (4 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.