Galveston, TX climate
Galveston has warm winters and warm summers, with plenty of rain. A typical July afternoon reaches 89°, a January night drops to 48°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Galveston feels like
Winter
Spring
Summer
Fall
Galveston 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 | 62° | 48° | 4.3" | 0 | 9 | 0 | 50° – 62° |
| February | 65° | 51° | 2.8" | 0 | 8 | 0 | 50° – 66° |
| March | 70° | 57° | 3.1" | 0 | 7 | 0 | 57° – 71° |
| April | 76° | 64° | 3.3" | 0 | 6 | 0 | 66° – 73° |
| May | 82° | 71° | 4.1" | 0 | 5 | 0 | 73° – 79° |
| June | 88° | 77° | 5.2" | 0 | 9 | 0 | 79° – 84° |
| July | 89° | 79° | 4.3" | 0 | 9 | 0 | 81° – 86° |
| August | 90° | 79° | 5.2" | 0 | 8 | 0 | 80° – 88° |
| September | 87° | 75° | 6.6" | 0 | 10 | 0 | 78° – 85° |
| October | 80° | 66° | 5.1" | 0 | 7 | 0 | 70° – 78° |
| November | 71° | 57° | 3.9" | 0 | 8 | 0 | 58° – 69° |
| December | 65° | 50° | 4.2" | 0.1" | 10 | 0 | 51° – 61° |
| Year | 77° | 64° | 52.2" | 0.1" | 95 | 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 Galveston
Galveston gets 52 inches of rain and melted snow a year. September is the wettest month and February the driest. Rain or snow falls on about 95 days a year.
A year-round growing season
Heating and cooling a home in Galveston
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Galveston, 23% of that work is heating and 77% 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.
Galveston and its neighbors
Galveston borders 2 towns with climate data. January nights across them vary by 0.8°. Texas City has both the coldest January nights (47°) and the hottest July afternoons (90°). Galveston’s January low is 48° and its July high 89°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Galveston 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 Galveston averaged 1.4° warmer than the 1900s. The biggest change is in February (+2.5°). The shift is larger than in 63% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Galveston’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 50° to 66°. June is the most reliable, staying within 5°.
Common questions about Galveston’s climate
What is the coldest month in Galveston?
January, with a typical high of 62° and a low of 48°.
What is the hottest month in Galveston?
August, with a typical high of 90° and a low of 79°. About 57 days a year reach 90°.
How much snow does Galveston get?
Almost none. A normal year brings 0.1 inches.
When is the first frost in Galveston?
Frost is uncommon. Only 73% of years see a night at 32° or below.
What is the rainiest month in Galveston?
September, with 6.6 inches of rain and melted snow. The year totals 52 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Galveston itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Galveston Scholes Fld, TX (9 mi, snow) and Galveston, TX (13 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.