World Resorts USA Portsmouth Weather

Portsmouth weather in September

Weather in Portsmouth: September

Average day temperature: 70.1°F
Average night temperature: 58.3°F
Sea water temperature: 62.4°F
Number of sunny days: 13 days
Day length: 11.8 - 13.2 hours
Number of rainy days: 2 days
Precipitation totals: 0.9 in.

Air temperature in September, °F

Show year:
2024
2023
2022

The highest day temperature during September of 2024 was 82°F. At the same time the lowest night temperature was 49°F. Day and night temperature averages during September were 70.1°F and 55.9°F.

Sea water temperature in Portsmouth in September, °F

Show year:
2024
2023
2022

The average sea water temperature in September of 2024 was 61.2°F. The highest and lowest sea temperatures during the month were 64.9°F and 58.6°F.

Sunny, partly cloudy and cloudy days

Mostly all days in September are sunny but cloudy days are also possible.

Precipitation total in September, in.

Precipitation total value in Portsmouth in September is 0.9 in. Other months of the year show relatively similar values.

Wind speed in September, mph

The average wind speed value in September is 7.2 mph It makes September one of the least windy months of the year.

Average sunny hours

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 7.1.

Best time for vacation in Portsmouth

Sunniest months:
November 15 days
September 13 days
October 12 days
Warmest months:
July 78.0 °F
August 76.6 °F
June 72.2 °F
Warmest sea temp:
August 65.3 °F
July 63.4 °F
September 62.4 °F
Coldest months:
January 33.8 °F
February 34.6 °F
December 39.4 °F
Rainiest months:
December 3 days
July 3 days
April 3 days
Windiest months:
March 10.0 mph
February 9.5 mph
December 9.4 mph

Portsmouth on a weather map

Portsmouth
+45°F
SW 17 mph
Feels like: +39°F
Precip.: 0%
Places in USA:
Name
°F
+48°F
+50°F
+75°F
+75°F
+59°F
+70°F
+77°F
+70°F
+46°F
+63°F
+57°F
+73°F
+72°F
+66°F
+34°F
24 Hours Forecast
Portsmouth
Local time: 13:59
November 21, thursday
1500
45°F
SW
17 mph
1800
45°F
SW
16 mph
2100
45°F
SW
17 mph
November 22, friday
0000
45°F
W
19 mph
0300
45°F
W
23 mph
0600
46°F
W
21 mph
0900
48°F
N
14 mph
1200
48°F
N
10 mph
Units of measurement: °C / °F