Ulster (Donegal)
May
Weather in Ulster for May 2026
Your guide to Ulster weather in May - trends and predictions
In general, the average temperature in Ulster at the beginning of May is 13.9 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 14.1 °C by the end of May.
Ulster in May brings notable rainfall, with an average of 18 rainy days and a total precipitation of 70.4 mm.
Temperatures
Rain 🌧️
13
Dry days
18
Rainy days
0
Snow days
15°/7°
Temperatures
16 km/h
Avg max wind
79 %
Avg humidity
Ulster Weather May
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What’s the Weather Like in Ulster This May?
Discover the average temperatures and weather trends across Ulster’s cities this May.
Temperatures trend during May in Ulster
See the weather trend as well as the moving average line
May weather in Ulster day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Patchy rain possible | 14° /5° | 0.2 mm | 3 | |
| 2 May | Patchy rain possible | 15° /4° | 0 mm | 4 | |
| 3 May | Patchy rain possible | 14° /5° | 0.3 mm | 3 | |
| 4 May |  Light rain | 12° /5° | 5.2 mm | 4 | |
| 5 May | Patchy rain possible | 14° /4° | 0.2 mm | 4 | |
| 6 May | Patchy rain possible | 13° /5° | 0.1 mm | 4 | |
| 7 May |  Cloudy | 15° /4° | 0 mm | 4 | |
| 8 May | Light drizzle | 15° /6° | 0.4 mm | 4 | |
| 9 May | Patchy rain possible | 15° /7° | 0.3 mm | 4 | |
| 10 May | Patchy rain possible | 18° /9° | 0.4 mm | 4 | |
| 11 May | Patchy rain possible | 19° /6° | 1.1 mm | 5 | |
| 12 May | Light rain shower | 14° /8° | 3 mm | 4 | |
| 13 May | Light rain shower | 18° /8° | 4.5 mm | 5 | |
| 14 May | Light rain shower | 18° /7° | 1.1 mm | 5 | |
| 15 May | Light rain shower | 18° /7° | 0.4 mm | 5 | |
| 16 May | Light rain shower | 20° /6° | 1.1 mm | 5 | |
| 17 May | Patchy rain possible | 19° /8° | 0.1 mm | 5 | |
| 18 May |  Overcast | 19° /7° | 0.5 mm | 5 | |
| 19 May | Patchy rain possible | 16° /5° | 0 mm | 4 | |
| 20 May | Light rain shower | 20° /7° | 2.1 mm | 5 | |
| 21 May | Light rain shower | 16° /8° | 3.4 mm | 4 | |
| 22 May | Light rain shower | 16° /6° | 2 mm | 4 | |
| 23 May | Patchy rain possible | 13° /5° | 1.1 mm | 3 | |
| 24 May | Patchy rain possible | 14° /8° | 8.2 mm | 4 | |
| 25 May | Light rain shower | 14° /7° | 4.8 mm | 4 | |
| 26 May | Light rain shower | 12° /7° | 9.6 mm | 3 | |
| 27 May | Light rain shower | 13° /6° | 2.7 mm | 4 | |
| 28 May |  Moderate or heavy rain with thunder | 15° /8° | 5.9 mm | 4 | |
| 29 May | Light rain shower | 15° /9° | 7.4 mm | 4 | |
| 30 May | Light rain shower | 15° /8° | 1.7 mm | 4 | |
| 31 May | Overcast | 15° /7° | 2.3 mm | 4 | |
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Important Notice
Our weather forecast for Ulster 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 Ulster forecast closer to your planned date for the most up-to-date weather information.
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Ulster in May - FAQ
What are the expected maximum and minimum temperatures in Ulster during May?
During May, expect a variety of temperatures with highs around 15° and lows near 7°, suitable for diverse activities and preferences.
How much rainfall should be expected in Ulster during May?
Moderate rainfall is anticipated in Ulster during May, with a total of 70.4 mm spread over approximately 18 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Ulster during May?
The average wind speed in Ulster during May is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Ulster
Explore the daily rainfall trends and prepare for Ulsters May weather 💧
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