Portsmouth Weather in May

What's the weather like in Portsmouth (Saint John) in May 2023?

The climate in Portsmouth during May can be summarized as hot, humid and wet.

May is in the spring in Portsmouth and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a steamy 31°C (87°F), whilst at night 23°C (74°F) is normal.

Portsmouth weather averages (imperial / metric)
Daytime temperature 30.5°C 86.8°F
Nightly temperature 23.2°C 73.7°F
Average temperature 26.8°C 80.2°F
Daily sunshine 8.3 hrs
Avg rainfall 177 mm 7 ins
Rainy days 17 days
Sea temperature 27.7°C 81.9°F
Humidity 78%
Windspeed 18.4kph 11 mph

On average May is the 6th wettest month of the year in Portsmouth with around 177mm 7 inches of rain making it a wet time to visit. This rainfall is typically spread over 17 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.3 hours of sunshine per day.

May temperatures in Portsmouth

Portsmouth average temperature in May

May rainfall

Portsmouth average rain in May

May hourly sunshine

Portsmouth average rain in May

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Portsmouth in May 2022.

Other monthly averages

Best places to visit in May

UV index Best time to go?

Portsmouth weather stats

Portsmouth weather statistics
Hottest month: July 30.6°C 87.1°F
Driest month: February 95mm 3.7ins
Sunniest month: April 8.6hrs
Coldest month: February 28.3°C 82.9°F
Wettest month: November 301mm 11.9ins
Map showing location of Portsmouth (15.58333, -61.46667)

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