- Kids stay & eat for free at Marriot Bonvoy
- Destinations include Europe, Middle East & Africa
- Valid for up to 2 adults & 2 kids aged up to 12
Portsmouth weather in May 2025
Expect 19°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Portsmouth in May. Check more long-term weather averages for Portsmouth in May before you book your next holiday to New Hampshire in 2025/2026.
- 1919°C max day temperature
- 8 hours of sunshine per day
- 1212 days with some rainfall
- 66°C min night temperature
- 1515 hours of daylight per day
- 0No heat & humidity
- 8686 mm of monthly rainfall
- 77 (High) UV index
- 99°C sea temperature
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Recommended for New Hampshire
The May 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 / mm) | Imperial (°F / inches)
More about the USA
How hot is it in Portsmouth in May?
Daytime temperatures usually reach 19°C in Portsmouth in May, falling to 6°C at night.
How sunny is it in Portsmouth in May?
There are normally 8 hours of bright sunshine each day in Portsmouth in May - that's 55% of daylight hours.
Is the sea cold around Portsmouth in May?
The average sea temperature around Portsmouth in May is 9°C.
Does it rain in Portsmouth in May?
There are usually 12 days with some rain in Portsmouth in May and the average monthly rainfall is 86mm.
Portsmouth May sunrise & sunset times
Browse the sunrise and sunset times for Portsmouth in May 2025. Select a month to view Portsmouth sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Thursday, 1st May 2025 | 04:36 | 18:45 |
Friday, 16th May 2025 | 04:18 | 19:01 |
Saturday, 31st May 2025 | 04:07 | 19:15 |
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