Belfast
May
Weather in Belfast for May 2026
Your guide to Belfast weather in May - trends and predictions
Until now, May 2026 in Belfast is cooler than usual, with temperatures averaging 11.6 °C, this is -2.4 °C below the typical seasonal average.
Expect cooler weather in the next days in Belfast with the forecast suggesting a temperature of 17.7 °C, lower than the historical average.
In general, the average temperature in Belfast at the beginning of May is 13 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 19 °C by the end of May.
Belfast in May brings notable rainfall, with an average of 17 rainy days and a total precipitation of 160.7 mm.
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Temperatures
Rain 🌧️
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14
Dry days
17
Rainy days
0
Snow days
16°/5°
Temperatures
17 km/h
Avg max wind
84 %
Avg humidity
Belfast Weather May
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Temperatures trend during May in Belfast
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May weather in Belfast day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Patchy rain possible | 14° /6° | 1.2 mm | 3 | |
| 2 May | Patchy rain possible | 13° /6° | 0.5 mm | 3 | |
| 3 May | Patchy rain possible | 12° /6° | 0.8 mm | 3 | |
| 4 May | Patchy rain possible | 12° /5° | 1 mm | 3 | |
| 5 May |  Heavy rain at times | 13° /6° | 2.2 mm | 4 | |
| 6 May | Patchy rain possible | 13° /5° | 0.8 mm | 3 | |
| 7 May | Patchy rain possible | 14° /6° | 1.2 mm | 3 | |
| 8 May | Patchy rain possible | 14° /6° | 4.9 mm | 4 | |
| 9 May | Patchy rain possible | 14° /6° | 0.4 mm | 4 | |
| 10 May | Patchy rain possible | 15° /5° | 2.3 mm | 4 | |
| 11 May |  Moderate or heavy rain shower | 14° /7° | 3 mm | 4 | |
| 12 May |  Cloudy | 14° /7° | 1.6 mm | 3 | |
| 13 May |  Sunny | 15° /7° | 3.4 mm | 4 | |
| 14 May | Patchy rain possible | 13° /6° | 1.4 mm | 3 | |
| 15 May | Patchy rain possible | 13° /5° | 0.7 mm | 4 | |
| 16 May | Patchy rain possible | 14° /5° | 1.6 mm | 4 | |
| 17 May |  Overcast | 15° /6° | 1.9 mm | 4 | |
| 18 May | Patchy rain possible | 16° /5° | 1.8 mm | 4 | |
| 19 May | Overcast | 15° /6° | 5.4 mm | 3 | |
| 20 May | Patchy rain possible | 15° /7° | 1.5 mm | 3 | |
| 21 May | Patchy rain possible | 16° /8° | 1.8 mm | 3 | |
| 22 May | Patchy rain possible | 17° /10° | 3 mm | 4.7 | |
| 23 May | Patchy rain possible | 19° /8° | 0.6 mm | 6.5 | |
| 24 May |  Partly cloudy | 21° /9° | 0 mm | 6.6 | |
| 25 May | Patchy rain possible | 20° /9° | 0.4 mm | 6.6 | |
| 26 May | Sunny | 19° /6° | 0 mm | 6.4 | |
| 27 May | Sunny | 17° /5° | 0 mm | 4 | |
| 28 May | Partly cloudy | 19° /7° | 0 mm | 4 | |
| 29 May | Sunny | 19° /8° | 0 mm | 4 | |
| 30 May | Patchy rain possible | 19° /9° | 0.3 mm | 3 | |
| 31 May | Patchy rain possible | 20° /12° | 0.1 mm | 4 | |
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Important Notice
Our weather forecast for Belfast 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 Belfast forecast closer to your planned date for the most up-to-date weather information.
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Belfast in May - FAQ
What are the expected maximum and minimum temperatures in Belfast during May?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 5°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Belfast during May?
Significant rainfall exceeding 160.7 mm is expected in Belfast during May, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Belfast during May?
The average wind speed in Belfast during May is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Belfast
Explore the daily rainfall trends and prepare for Belfasts May weather 💧
Typically, Belfast has 17 rainy days in May with a total of 160.7 mm of rainfall.
UV exposure in Belfast during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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