Portsmouth weather in September 2024

Expect 73°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Portsmouth in September. Check more long-term weather averages for Portsmouth in September before you book your next holiday to New Hampshire in 2024/2025.

73
73°F max day temperature
8
8 hours of sunshine per day
8
8 days with some rainfall
50
50°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
3.4
3.4 inches of monthly rainfall
6
6 (High) UV index
61
61°F sea temperature

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The September weather guide for New Hampshire (Portsmouth) 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 Portsmouth in September?

Daytime temperatures usually reach 73°F in Portsmouth in September, falling to 50°F at night.

How sunny is it in Portsmouth in September?

There are normally 8 hours of bright sunshine each day in Portsmouth in September - that's 60% of daylight hours.

How warm is the sea around Portsmouth in September?

The average sea temperature around Portsmouth in September is 61°F.

Does it rain in Portsmouth in September?

There are usually 8 days with some rain in Portsmouth in September and the average monthly rainfall is 3.4 inches.

What is the chance of a hurricane in Portsmouth in September?

On average less than 1 day in September in Portsmouth is likely to be affected by the passage of one or more tropical storms.

Portsmouth September sunrise & sunset times

Browse the sunrise and sunset times for Portsmouth in September 2024. Select a month to view Portsmouth sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Sunday, 1st September 2024	06:08	19:17
Sunday, 15th September 2024	06:23	18:52
Monday, 30th September 2024	06:40	18:25

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New Hampshire - quick facts
Flight time^✝	11.5 hours
Time difference	UK -5 hours
Language(s)	English
Currency	US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes
Why visit?	Nature
Tourist info	New Hampshire Division of Travel & Tourism Development