Portsmouth
May
Weather in Portsmouth for May 2025
Your guide to Portsmouth weather in May - trends and predictions
In general, the average temperature in Portsmouth at the beginning of May is 13.9 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 17.1 °C by the end of May.
With an average of 5 rainy days, Portsmouth experiences minimal rainfall in May, ensuring that most days remain pleasantly dry.
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26
Dry days
5
Rainy days
0
Snow days
16°/9°
Temperatures
23 km/h
Avg max wind
82 %
Avg humidity
Portsmouth in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  15° | 2  13° | 3 13° | 4 14° | |||
| 5 14° | 6  13° | 7 15° | 8  13° | 9 15° | 10 14° | 11 15° |
| 12 14° | 13 16° | 14  16° | 15 14° | 16 15° | 17 15° | 18 16° |
| 19 17° | 20 18° | 21 15° | 22 17° | 23 15° | 24 17° | 25  16° |
| 26 17° | 27 17° | 28 17° | 29 17° | 30  18° | 31 18° |
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Temperatures trend during May in Portsmouth
See the weather trend as well as the moving average line
May weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May | Patchy rain possible | 15° /9° | 3 mm | 4 | |
| 2 May | Overcast | 13° /8° | 5.3 mm | 3 | |
| 3 May | Overcast | 13° /7° | 0.4 mm | 3 | |
| 4 May | Patchy rain possible | 14° /9° | 0.2 mm | 4 | |
| 5 May | Patchy rain possible | 14° /10° | 2.2 mm | 4 | |
| 6 May | Moderate or heavy rain shower | 13° /10° | 7.8 mm | 3 | |
| 7 May | Patchy rain possible | 15° /10° | 0.6 mm | 4 | |
| 8 May | Heavy rain at times | 13° /10° | 3 mm | 3 | |
| 9 May | Moderate or heavy rain shower | 15° /10° | 6 mm | 4 | |
| 10 May | Patchy rain possible | 14° /10° | 0.8 mm | 4 | |
| 11 May | Patchy rain possible | 15° /9° | 0.6 mm | 4 | |
| 12 May | Moderate or heavy rain shower | 14° /11° | 1.6 mm | 4 | |
| 13 May | Overcast | 16° /10° | 4.8 mm | 4 | |
| 14 May | Cloudy | 16° /10° | 3.8 mm | 4 | |
| 15 May | Patchy rain possible | 14° /10° | 0.4 mm | 3 | |
| 16 May | Cloudy | 15° /9° | 0.3 mm | 4 | |
| 17 May | Overcast | 15° /9° | 0 mm | 4 | |
| 18 May | Patchy rain possible | 16° /11° | 5.7 mm | 4 | |
| 19 May | Patchy rain possible | 17° /11° | 0.3 mm | 4 | |
| 20 May | Overcast | 18° /9° | 0.6 mm | 4 | |
| 21 May | Overcast | 15° /8° | 1.3 mm | 4 | |
| 22 May | Cloudy | 17° /10° | 0.5 mm | 4 | |
| 23 May | Overcast | 15° /9° | 0.1 mm | 4 | |
| 24 May | Cloudy | 17° /8° | 0 mm | 4 | |
| 25 May | Sunny | 16° /9° | 1.6 mm | 4 | |
| 26 May | Sunny | 17° /9° | 1.9 mm | 5 | |
| 27 May | Sunny | 17° /9° | 0.9 mm | 4 | |
| 28 May | Overcast | 17° /10° | 4 mm | 4 | |
| 29 May | Overcast | 17° /10° | 0.8 mm | 4 | |
| 30 May | Partly cloudy | 18° /9° | 1.8 mm | 5 | |
| 31 May | Overcast | 18° /10° | 0.1 mm | 5 | |
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Important Notice
Our weather forecast for Portsmouth in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Portsmouth forecast closer to your planned date for the most up-to-date weather information.
Portsmouth in May - FAQ
What are the expected maximum and minimum temperatures in Portsmouth during May?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Portsmouth during May?
Moderate rainfall is anticipated in Portsmouth during May, with a total of 98.8 mm spread over approximately 5 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Portsmouth during May?
The average wind speed in Portsmouth during May is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
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