Galveston, TX Climate & Monthly Averages
The climate of Galveston
Weather in Galveston is shaped by its humid subtropical climate - expect hot, humid summers and generally mild winters. August afternoons typically reach 87°F (31°C), while January highs hover near 61°F (16°C). Annual precipitation averages 66.6 inches (1691 mm) over about 156 rainy days.
Climate quick facts
- Hottest month: August - highs near 87°F (31°C)
- Coldest month: January - highs near 61°F (16°C)
- Record high: 98°F (37°C) · Record low: 21°F (-6°C) (2015–2024)
- Wettest month: September (15 rainy days) · Sunniest: June (11.4 h sun/day)
- Climate type: humid subtropical - hot, humid summers and generally mild winters
Temperatures through the year
The warmest stretch of the year centers on August. Highs average 87°F (31°C) and overnight lows stay near 81°F (27°C). The coolest month is January, with typical highs of 61°F (16°C) and lows around 51°F (10°C). Based on 2015–2024 weather data, temperatures have reached as high as 98°F (37°C) and dropped as low as 21°F (-6°C).
Rain, sun and snow
September is usually the wettest month. It brings about 6.9 inches (176 mm) of rain over 15 days, while February is the driest. June brings the most sunshine, averaging 11.4 hours of sun a day.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 61° | 51° | 10 | 5.0 in | 7.3 h/day | 77% |
| February | 63° | 54° | 11 | 3.4 in | 7.6 h/day | 82% |
| March | 69° | 61° | 12 | 4.6 in | 8.4 h/day | 80% |
| April | 74° | 67° | 14 | 5.9 in | 9.8 h/day | 78% |
| May | 80° | 74° | 16 | 6.5 in | 10.4 h/day | 80% |
| June | 85° | 79° | 15 | 6.3 in | 11.4 h/day | 78% |
| July | 87° | 81° | 14 | 5.7 in | 11.4 h/day | 78% |
| August | 87° | 81° | 16 | 6.5 in | 11.1 h/day | 76% |
| September | 85° | 78° | 15 | 6.9 in | 9.9 h/day | 75% |
| October | 79° | 71° | 11 | 5.7 in | 9.5 h/day | 73% |
| November | 70° | 62° | 10 | 5.1 in | 8.0 h/day | 76% |
| December | 65° | 56° | 11 | 4.9 in | 7.1 h/day | 80% |
Galveston month by month
Galveston weather in January
January brings highs around 61°F (16°C), lows near 51°F (10°C), about 10 wet days - typically the coldest month of the year in Galveston.
Galveston weather in February
February brings highs around 63°F (17°C), lows near 54°F (12°C), about 11 wet days - typically the driest month of the year in Galveston.
Galveston weather in March
March brings highs around 69°F (21°C), lows near 61°F (16°C), about 12 wet days.
Galveston weather in April
April brings highs around 74°F (24°C), lows near 67°F (19°C), about 14 wet days.
Galveston weather in May
May brings highs around 80°F (27°C), lows near 74°F (23°C), about 16 wet days.
Galveston weather in June
June brings highs around 85°F (30°C), lows near 79°F (26°C), about 15 wet days - typically the sunniest month of the year in Galveston.
Galveston weather in July
July brings highs around 87°F (30°C), lows near 81°F (27°C), about 14 wet days.
Galveston weather in August
August brings highs around 87°F (31°C), lows near 81°F (27°C), about 16 wet days - typically the hottest month of the year in Galveston.
Galveston weather in September
September brings highs around 85°F (29°C), lows near 78°F (26°C), about 15 wet days - typically the wettest month of the year in Galveston.
Galveston weather in October
October brings highs around 79°F (26°C), lows near 71°F (22°C), about 11 wet days.
Galveston weather in November
November brings highs around 70°F (21°C), lows near 62°F (17°C), about 10 wet days.
Galveston weather in December
December brings highs around 65°F (18°C), lows near 56°F (13°C), about 11 wet days.
Seasons in Galveston
Spring (March through May)
Spring in Galveston brings comfortable warmth, with daytime highs averaging 75°F (24°C) and nights around 67°F (20°C); expect showers on roughly 42 days across the season.
Summer (June through August)
Summer in Galveston brings hot afternoons, with daytime highs averaging 86°F (30°C) and nights around 80°F (27°C); expect showers on roughly 46 days across the season. With the humidity factored in, afternoons often feel hotter than the thermometer reads - run the numbers through the humidity and dew point converter to see why.
Fall (September through November)
Fall in Galveston is mild and warm, with daytime highs averaging 78°F (25°C) and nights around 71°F (21°C); expect showers on roughly 36 days across the season.
Winter (December through February)
Winter in Galveston stays on the cool side of mild, with daytime highs averaging 63°F (17°C) and nights around 54°F (12°C); expect showers on roughly 32 days across the season.
Climate questions, answered
What is the average temperature in Galveston?
Is Galveston hot in summer?
Is Galveston cold in winter?
How many rainy days does Galveston get in a year?
Best time to visit Galveston
The best time to visit Galveston is generally October to February, when warm days, manageable rainfall and plenty of daylight line up. Daytime temperatures in that window typically sit near 67°F (20°C).
Pack for Galveston with lightweight, breathable clothing and strong sun protection for the hot months; a compact umbrella or rain shell - showers are a regular feature; moisture-wicking fabrics to cope with the humidity. Evenings can feel noticeably cooler than afternoons - August nights average 81°F (27°C).
Galveston temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.