Cardiff
May
Weather in Cardiff for May 2026
Your guide to Cardiff weather in May - trends and predictions
In general, the average temperature in Cardiff at the beginning of May is 14.4 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 16.6 °C by the end of May.
Cardiff in May brings notable rainfall, with an average of 19 rainy days and a total precipitation of 76.5 mm.
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Temperatures
Rain 🌧️
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12
Dry days
19
Rainy days
0
Snow days
16°/8°
Temperatures
21 km/h
Avg max wind
81 %
Avg humidity
Cardiff Weather May
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Temperatures trend during May in Cardiff
See the weather trend as well as the moving average line
May weather in Cardiff day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Patchy rain possible | 17° /8° | 3.2 mm | 4 | |
| 2 May | Patchy rain possible | 14° /8° | 10.8 mm | 4 | |
| 3 May |  Partly cloudy | 14° /7° | 0.6 mm | 4 | |
| 4 May | Patchy rain possible | 13° /5° | 4.1 mm | 3 | |
| 5 May |  Moderate or heavy rain shower | 13° /6° | 3.2 mm | 3 | |
| 6 May | Moderate or heavy rain shower | 15° /7° | 4.8 mm | 3 | |
| 7 May | Patchy rain possible | 15° /8° | 0.2 mm | 4 | |
| 8 May | Patchy rain possible | 15° /8° | 6.2 mm | 3 | |
| 9 May |  Heavy rain at times | 16° /7° | 0.8 mm | 4 | |
| 10 May | Patchy rain possible | 16° /8° | 0.6 mm | 4 | |
| 11 May | Heavy rain at times | 17° /9° | 3.3 mm | 4 | |
| 12 May | Light rain shower | 16° /9° | 3.1 mm | 4 | |
| 13 May |  Cloudy | 17° /9° | 6.9 mm | 4 | |
| 14 May |  Overcast | 17° /9° | 1.3 mm | 4 | |
| 15 May | Overcast | 15° /8° | 0.7 mm | 4 | |
| 16 May | Overcast | 16° /6° | 2.1 mm | 4 | |
| 17 May | Patchy rain possible | 17° /7° | 0.3 mm | 4 | |
| 18 May | Overcast | 17° /9° | 0.9 mm | 4 | |
| 19 May | Patchy rain possible | 17° /8° | 1.2 mm | 4 | |
| 20 May | Partly cloudy | 17° /8° | 0.4 mm | 4 | |
| 21 May | Overcast | 16° /8° | 3.7 mm | 4 | |
| 22 May | Patchy rain possible | 18° /8° | 0.6 mm | 4 | |
| 23 May | Patchy rain possible | 15° /7° | 0.3 mm | 4 | |
| 24 May | Patchy rain possible | 17° /9° | 2.3 mm | 4 | |
| 25 May | Cloudy | 16° /8° | 4.3 mm | 4 | |
| 26 May | Light rain shower | 16° /9° | 2.6 mm | 4 | |
| 27 May |  Sunny | 16° /9° | 4 mm | 4 | |
| 28 May | Overcast | 16° /10° | 2.8 mm | 4 | |
| 29 May | Patchy rain possible | 17° /9° | 0.3 mm | 4 | |
| 30 May | Partly cloudy | 18° /9° | 0.6 mm | 4 | |
| 31 May | Patchy rain possible | 17° /9° | 0.6 mm | 4 | |
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Important Notice
Our weather forecast for Cardiff 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 Cardiff forecast closer to your planned date for the most up-to-date weather information.
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Cardiff in May - FAQ
What are the expected maximum and minimum temperatures in Cardiff during May?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Cardiff during May?
Moderate rainfall is anticipated in Cardiff during May, with a total of 76.5 mm spread over approximately 19 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Cardiff during May?
The average wind speed in Cardiff during May is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Cardiff
Explore the daily rainfall trends and prepare for Cardiffs May weather 💧
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