Portsmouth
May
Weather in Portsmouth for May 2026
Your guide to Portsmouth weather in May - trends and predictions
In general, the average temperature in Portsmouth at the beginning of May is 14 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 16.9 °C by the end of May.
Portsmouth in May brings notable rainfall, with an average of 16 rainy days and a total precipitation of 46.1 mm.
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Temperatures
Rain 🌧️
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15
Dry days
16
Rainy days
0
Snow days
15°/10°
Temperatures
24 km/h
Avg max wind
80 %
Avg humidity
Portsmouth Weather May
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Temperatures trend during May in Portsmouth
See the weather trend as well as the moving average line
May weather in Portsmouth day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Patchy rain possible | 15° /10° | 2 mm | 4 | |
| 2 May |  Overcast | 14° /9° | 3.5 mm | 3 | |
| 3 May | Patchy rain possible | 14° /8° | 0.3 mm | 3 | |
| 4 May | Patchy rain possible | 13° /8° | 0.2 mm | 4 | |
| 5 May | Patchy rain possible | 14° /8° | 1.6 mm | 3 | |
| 6 May |  Moderate or heavy rain shower | 13° /8° | 5.2 mm | 3 | |
| 7 May | Patchy rain possible | 15° /8° | 0.4 mm | 4 | |
| 8 May |  Heavy rain at times | 14° /9° | 2.1 mm | 3 | |
| 9 May | Moderate or heavy rain shower | 15° /9° | 4 mm | 4 | |
| 10 May |  Sunny | 15° /9° | 0.5 mm | 4 | |
| 11 May | Patchy rain possible | 15° /10° | 0.5 mm | 4 | |
| 12 May | Patchy rain possible | 14° /11° | 1.1 mm | 3 | |
| 13 May | Overcast | 16° /10° | 4 mm | 4 | |
| 14 May |  Cloudy | 16° /10° | 2.5 mm | 4 | |
| 15 May | Patchy rain possible | 14° /9° | 0.3 mm | 3 | |
| 16 May | Cloudy | 16° /8° | 0.2 mm | 4 | |
| 17 May |  Partly cloudy | 15° /9° | 0 mm | 4 | |
| 18 May | Patchy rain possible | 16° /10° | 3.8 mm | 4 | |
| 19 May | Patchy rain possible | 17° /10° | 0.2 mm | 4 | |
| 20 May | Overcast | 18° /9° | 0.4 mm | 4 | |
| 21 May | Overcast | 15° /9° | 2 mm | 3 | |
| 22 May | Light rain shower | 17° /9° | 0.8 mm | 4 | |
| 23 May | Patchy rain possible | 15° /9° | 0.2 mm | 3 | |
| 24 May | Cloudy | 17° /9° | 0.7 mm | 4 | |
| 25 May | Sunny | 16° /10° | 1.6 mm | 4 | |
| 26 May | Sunny | 16° /10° | 1.4 mm | 4 | |
| 27 May | Sunny | 16° /10° | 1.8 mm | 4 | |
| 28 May | Overcast | 17° /11° | 2.9 mm | 4 | |
| 29 May | Overcast | 17° /11° | 0.5 mm | 4 | |
| 30 May | Partly cloudy | 18° /10° | 1.2 mm | 5 | |
| 31 May | Overcast | 18° /11° | 0.1 mm | 4 | |
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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.
Change Month
Portsmouth in May - FAQ
What are the expected maximum and minimum temperatures in Portsmouth during May?
During May, expect a variety of temperatures with highs around 15° and lows near 10°, suitable for diverse activities and preferences.
How much rainfall should be expected in Portsmouth during May?
In May, Portsmouth can expect light to moderate rainfall, totaling 46.1 mm across approximately 16 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Portsmouth during May?
The average wind speed in Portsmouth during May is 24 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Portsmouth
Explore the daily rainfall trends and prepare for Portsmouths May weather 💧
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