Galveston Weather in May
May in Galveston brings high temperatures, with highs of 28°C (82°F) and nights dropping to 22°C (72°F). Rainfall is on the higher side this month, averaging around 69 mm (2.7 in), so keep a rain jacket handy.
Rainfall in Galveston in May
You can expect rain on roughly 7 days based on historical data, averaging 69 mm (2.7 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Galveston in May
If you're visiting Galveston in May, expect perfect temperatures with highs of 28°C (82°F) and overnight lows of 22°C (72°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. At 22°C (72°F) overnight, nights are warm enough to sit outside comfortably in light clothing.
Sunshine in Galveston in May
There are approximately 267 hours of sunshine this month, resulting in mostly clear days.If your ideal day consists of dry skies and pleasant temperatures, March, April, May and November typically offer the best circumstances for Galveston.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Galveston's climate page.
Galveston Temperature in May
Min Temperature
22°C (72°F)
Max Temperature
28°C (82°F)
Chance of Rain
23%
Precipitation
69 mm (2.7 in)
Rainy days
7 days
Sunshine
267 hours
Percentage Sunshine
64%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Galveston typically stay consistent throughout May, with daily highs averaging around 28°C (82°F). Nights are warm, with lows typically ranging from 20°C (68°F) to 24°C (75°F).
Average temperatures in May
Historical weather for Galveston in May
Browse day-by-day weather records for Galveston spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Galveston historical weather extremes in May
Our historical data for Galveston spans 1976 to 2026, revealing these weather extremes.
- The hottest May day on record in Galveston reached 36°C (97°F) (May 26, 1981).
- On May 3, 1978, Galveston saw its coldest May day with temperatures maxing out at 19°C (66°F).
- Nighttime temperatures dropped to 11°C (52°F) on May 4, 1978, marking the coldest May night on record.
Best Places in the United States of America in May
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in May →
perfect weather
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tolerable
unpleasant
poor
What to Wear in Galveston in May
Warm but pleasant conditions in Galveston in May. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Wet weather is likely, so pack waterproof gear for multiple rainy days. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Galveston in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Galveston's climate page.
See the full Galveston climate overview or explore weather in the United States of America.
