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Galveston weather in September 2026
Expect daytime maximum temperatures of 30°C in Galveston, Texas in September and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 10 days with some rainfall and typically 138 mm of rainfall in the month.
- 30°C max day temperature
30 - 8 hours of sunshine per day
- 10 days with some rainfall
10 - 24°C min night temperature
24 - 12 hours of daylight per day
12 - High heat & humidity
H - 138 mm of monthly rainfall
138 - 9 (Very High) UV index
9 - 29°C sea temperature
29
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Recommended for Texas
The September weather guide for Texas (Galveston) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about the USA
How hot is it in Galveston in September?
Daytime temperatures usually reach 32°C in Galveston in September with high heat and humidity, falling to 20°C at night.
How sunny is it in Galveston in September?
There are normally 8 hours of bright sunshine each day in Galveston in September - that's 63% of daylight hours.
Does it rain in Galveston in September?
There are usually 8 days with some rain in Galveston in September and the average monthly rainfall is 90mm.
What is the chance of a hurricane in Galveston in September?
On average less than 1 day in September in Galveston is likely to be affected by the passage of one or more tropical storms.
Galveston September sunrise & sunset times
Browse the sunrise and sunset times for Galveston in September 2026. Select a month to view Galveston sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Tuesday, 1st September 2026 | 05:57 | 18:41 |
| Tuesday, 15th September 2026 | 06:04 | 18:24 |
| Wednesday, 30th September 2026 | 06:12 | 18:06 |
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