Galveston, TX Weather
Galveston hourly forecast: next 24 hours
Today's high of 88°F (31°C) is about 3°F (2°C) above the typical September high of 85°F (29°C).
Current conditions in detail
Galveston weather tomorrow (Wednesday, September 16)
Tomorrow in Galveston looks patchy rain nearby, with a high of 86° and an overnight low of 84°. There is a 69% chance of rain - plan accordingly. Winds top out near 18 mph, and the UV index reaches 8 (very high).
Galveston 14-day forecast
About the weather in Galveston
Galveston is genuinely wet: 66.6 inches (1691 mm) falls in an average year, across 156 days that carry about 10.8 mm each when they come. Temperatures are the calmer variable, running 61°F (16°C) to 87°F (31°C) between January and August.
Galveston weather: quick facts
- Hottest month: August - highs near 87°F (31°C)
- Coldest month: January - highs near 61°F (16°C)
- Decade extremes (2015-2024): 98°F (37°C) high · 21°F (-6°C) low
- Wettest month: September (15 rainy days) · Sunniest: June (11.4 h sun/day)
- Climate type: humid subtropical
- Annual swing: 16°C between the average warmest and coolest month · day to night: 4°C
- Months averaging 30°C or hotter: 2
- Average humidity: 78%
Temperatures through the year
Sunshine averages 9.3 hours a day over the year, peaking in June at 11.4 hours. Warmth peaks in August: highs of 87°F (31°C), lows of 81°F (27°C). January bottoms out at 61°F (16°C) in daylight, 51°F (10°C) after dark. Three of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is October through December.
Rain, sun and snow
Days and nights are about 4°C apart on average - narrower than almost anywhere else we cover. Precipitation concentrates in September - 6.9 inches (176 mm) on 15 days - and thins out by February. The gridded 2015-2024 daily record for this location tops out at 98°F (37°C) and bottoms at 21°F (-6°C) - decade extremes, not all-time station records.
Season by season
Spring (March through May)
Spring in Galveston settles into easy warmth, with daytime highs averaging 75°F (24°C) and nights around 67°F (20°C); rain falls on around 42 of the 90 days.
Summer (June through August)
Through summer, Galveston runs hot: 86°F (30°C) by day, 80°F (27°C) after dark, and rain falls on around 46 of the 90 days. Daylight is generous - around 11.3 hours of sun a day. With the moisture factored in, afternoons feel hotter than the reading suggests - the humidity and dew point converter shows why.
Fall (September through November)
Fall in Galveston brings comfortable warmth, with daytime highs averaging 78°F (25°C) and nights around 71°F (21°C); rain falls on around 36 of the 90 days.
Winter (December through February)
Winter in Galveston is crisp but comfortable, with daytime highs averaging 63°F (17°C) and nights around 54°F (12°C); rain falls on around 32 of the 90 days.
Average temperatures in Galveston by month
| 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% |