Groton Weather: May
 |
Average Day Temperature: | 65.5°F |
|
Average Night Temperature: | 51.8°F |
|
Sea Water Temperature: | 52.3°F |
|
Number of Sunny Days: | 11 days |
| Sunshine Hours: | 14.0 - 14.9 hours | |
|
Number of Rainy Days: | 2 days |
| Precipitation Totals: | 1.1 in | |
| detailed information | ||
14 day weather
forecast
forecast
| Groton |
Sea Water
Temperature
Temperature
| Groton |
Air Temperature in May, °F
The highest day temperature in May 2026 was 89°F. The lowest night temperature was 41°F. The average values for day and night temperatures during May were 68.0°F и 52.0°F respectivly.
Groton Water Sea Temperature in May, °F
The average sea surface temperature in May 2026 for Groton was 51.7°F. The maximum and minimum values were 45.8°F and 56.6°F respectively.
Sunny, Cloudy and Gloomy days
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 Groton is 1.1 in. This value is relatively stable throughout the year.
Wind Speed in May, mph
The average wind speed in May is 8.6 mph.
Average Sunny Hours Per Day
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 Groton in May is 7.7 hours.
Groton on the Weather Map
USA Resorts:
NAME
F°
| Boston |  |
+94 |
| Chicago | |
+82 |
| Hawaii |  |
+82 |
| Houston | |
+102 |
| Las Vegas | |
+124 |
| Los Angeles | |
+92 |
| Maui | |
+78 |
| Miami | |
+92 |
| Myrtle Beach |  |
+84 |
| New York | |
+84 |
| San Diego | |
+80 |
| San Francisco | |
+62 |
| Santa Monica | |
+80 |
| Sarasota | |
+92 |
| Washington | |
+88 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Groton
Local time: 14:19
05 aug, wednesday
| 1500 |  |
88°F | NE 7 mph |
| 1800 | |
82°F | N 7 mph |
| 2100 |  |
74°F | N 8 mph |
06 aug, thursday
| 0000 |  |
72°F | NE 6 mph |
| 0300 |  |
74°F | NE 5 mph |
| 0600 | |
74°F | NE 4 mph |
| 0900 |  |
80°F | NE 6 mph |
| 1200 | |
84°F | NE 7 mph |