Lake Sunapee weather in September 2025

Q: How hot is it in Lake Sunapee in September?

Daytime temperatures usually reach 20°C in Lake Sunapee in September, falling to 7°C at night.

Q: How sunny is it in Lake Sunapee in September?

There are normally 7 hours of bright sunshine each day in Lake Sunapee in September - that's 53% of daylight hours.

Q: Does it rain in Lake Sunapee in September?

There are usually 10 days with some rain in Lake Sunapee in September and the average monthly rainfall is 89mm.

Q: What is the chance of a cyclone in Lake Sunapee in September?

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

Expect 20°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Lake Sunapee in September. Check more long-term weather averages for Lake Sunapee in September before you book your next holiday to New Hampshire in 2025/2026.

20
20°C max day temperature
7
7 hours of sunshine per day
10
10 days with some rainfall
7
7°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
89
89 mm of monthly rainfall
6
6 (High) UV index

More about Lake Sunapee

Lake Sunapee by month

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The September weather guide for New Hampshire (Lake Sunapee) 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 / mm) | Imperial (°F / inches)

More about the USA

How hot is it in Lake Sunapee in September?

Daytime temperatures usually reach 20°C in Lake Sunapee in September, falling to 7°C at night.

How sunny is it in Lake Sunapee in September?

There are normally 7 hours of bright sunshine each day in Lake Sunapee in September - that's 53% of daylight hours.

Does it rain in Lake Sunapee in September?

There are usually 10 days with some rain in Lake Sunapee in September and the average monthly rainfall is 89mm.

What is the chance of a hurricane in Lake Sunapee in September?

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

Lake Sunapee September sunrise & sunset times

Browse the sunrise and sunset times for Lake Sunapee in September 2025. Select a month to view Lake Sunapee 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
Monday, 1st September 2025	05:13	18:23
Monday, 15th September 2025	05:28	17:58
Tuesday, 30th September 2025	05:45	17:31

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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