Galveston Island Weather: May
 |
Average Day Temperature: | 86.0°F |
|
Average Night Temperature: | 76.6°F |
|
Sea Water Temperature: | 82.3°F |
|
Number of Sunny Days: | 8 days |
| Sunshine Hours: | 13.3 - 13.9 hours | |
|
Number of Rainy Days: | 3 days |
| Precipitation Totals: | 1.7 in | |
| detailed information | ||
forecast
| Galveston Island |
Temperature
| Galveston Island |
Air Temperature in May, °F
The highest day temperature in May 2025 was 98°F. The lowest night temperature was 64°F. The average values for day and night temperatures during May were 88.5°F и 76.2°F respectivly.
Galveston Island Water Sea Temperature in May, °F
The average sea surface temperature in May 2025 for Galveston Island was 83.1°F. The maximum and minimum values were 79.6°F and 87.2°F respectively.
You can expect various weather conditions during May. Be ready for sunny, cloudy or even gloomy days.
Precipitation Totals in May, in
Precipitation total in May for Galveston Island is 1.7 in. It makes may the most rainy month of the year.
The average wind speed in May is 11.0 mph. It makes May one of the most windy months of the year for Galveston Island.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Galveston Island in May is 7.3 hours.
Galveston Island on the Weather Map
| Chicago |  |
-2 |
| Hawaii | |
+78 |
| Honolulu | |
+78 |
| Houston | |
+44 |
| Las Vegas |  |
+40 |
| Los Angeles | |
+52 |
| Maui | |
+72 |
| Miami | |
+72 |
| Miami Beach |  |
+80 |
| New York | |
+18 |
| San Diego | |
+54 |
| San Francisco | |
+46 |
| Sarasota | |
+62 |
| Tampa | |
+62 |
| Washington | |
+28 |
| 0300 |  |
46°F | S 15 mph |
| 0600 | |
44°F | S 16 mph |
| 0900 | |
48°F | S 14 mph |
| 1200 | |
48°F | SW 7 mph |
| 1500 | |
50°F | S 2 mph |
| 1800 | |
52°F | SW 6 mph |
| 2100 | |
54°F | W 6 mph |
| 0000 | |
56°F | W 4 mph |