Portsmouth Weather: May
 |
Average Day Temperature: | 63.7°F |
|
Average Night Temperature: | 50.6°F |
|
Sea Water Temperature: | 49.4°F |
|
Number of Sunny Days: | 11 days |
| Sunshine Hours: | 14.1 - 15.1 hours | |
|
Number of Rainy Days: | 2 days |
| Precipitation Totals: | 0.8 in | |
| detailed information | ||
forecast
| Portsmouth |
Temperature
| Portsmouth |
Air Temperature in May, °F
The highest day temperature in May 2025 was 84°F. The lowest night temperature was 42°F. The average values for day and night temperatures during May were 62.3°F и 50.9°F respectivly.
Portsmouth Water Sea Temperature in May, °F
The average sea surface temperature in May 2025 for Portsmouth was 48.6°F. The maximum and minimum values were 42.4°F and 52.6°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 Portsmouth is 0.8 in. It makes may the least rainy month of the year.
The average wind speed in May is 7.9 mph.
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 Portsmouth in May is 7.7 hours.
Portsmouth on the Weather Map
| Chicago |  |
0 |
| Hawaii |  |
+78 |
| Honolulu | |
+78 |
| Houston | |
+46 |
| 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 |  |
6°F | SE 11 mph |
| 0600 | |
4°F | E 6 mph |
| 0900 |  |
8°F | E 6 mph |
| 1200 | |
16°F | NE 7 mph |
| 1500 | |
22°F | NE 10 mph |
| 1800 |  |
22°F | NE 6 mph |
| 2100 | |
18°F | NE 6 mph |
| 0000 | |
16°F | NE 6 mph |