Galveston weather in May 2026

Expect daytime maximum temperatures of 81°F in Galveston, Texas in May based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 3.9 inches of rainfall in the month.

  • 81°F maximum daytime temperature in May in Galveston81
    81°F max day temperature
  • 9 hours of sunshine per day
  • 7 days with some rainfall in May in Galveston7
    7 days with some rainfall
  • 72°F minimum night-time temperature in May in Galveston72
    72°F min night temperature
  • 14 hours of daylight per day in May in Galveston14
    14 hours of daylight per day
  • Moderate heat & humidity in May in GalvestonM
    Moderate heat & humidity
  • 3.9 inches monthly rainfall in May in Galveston3.9
    3.9 inches of monthly rainfall
  • UV (maximum) index 10 (Very High) in May in Galveston10
    10 (Very High) UV index
  • 77°F sea temperature in May in Galveston77
    77°F sea temperature

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The May 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)  |  Imperial (°F)

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How hot is it in Galveston in May?

Daytime temperatures usually reach 81°F in Galveston in May with moderate heat and humidity, falling to 72°F at night.

How sunny is it in Galveston in May?

There are normally 9 hours of bright sunshine each day in Galveston in May - that's 62% of daylight hours.

How warm is the sea around Galveston in May?

The average sea temperature around Galveston in May is 77°F.

Does it rain in Galveston in May?

There are usually 7 days with some rain in Galveston in May and the average monthly rainfall is 3.9 inches.

Galveston May sunrise & sunset times

Browse the sunrise and sunset times for Galveston in May 2026. Select a month to view Galveston sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2026 05:37 18:56
Saturday, 16th May 2026 05:26 19:05
Sunday, 31st May 2026 05:20 19:14

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