Gwynedd (Barmouth)
May
Weather in Gwynedd for May 2025
Your guide to Gwynedd weather in May - trends and predictions
The forecast for the first days of May 2025 in Gwynedd predicts temperatures to be around 13 °C, close to the historical average.
In general, the average temperature in Gwynedd at the beginning of May is 14.1 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 13.3 °C by the end of May.
Gwynedd experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 144.1 mm.
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Temperatures
Rain 🌧️
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8
Dry days
23
Rainy days
0
Snow days
15°/8°
Temperatures
14 km/h
Avg max wind
86 %
Avg humidity
Gwynedd Weather May
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  17° | 2 15° | 3 16° | 4 14° | |||
| 5 12° | 6  12° | 7  13° | 8 11° | 9 11° | 10 11° | 11 11° |
| 12 11° | 13 12° | 14  15° | 15 16° | 16 16° | 17 15° | 18 17° |
| 19 19° | 20 17° | 21 17° | 22 12° | 23 9° | 24 11° | 25 15° |
| 26 12° | 27 12° | 28 12° | 29 13° | 30 14° | 31 15° |
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Temperatures trend during May in Gwynedd
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 | Sunny | 17° /11° | 0 mm | 1.7 | |
| 2 May | Sunny | 15° /8° | 0 mm | 1.5 | |
| 3 May | Sunny | 16° /7° | 0 mm | 1.5 | |
| 4 May | Sunny | 14° /8° | 0 mm | 1.3 | |
| 5 May | Sunny | 12° /6° | 0 mm | 3 | |
| 6 May | Patchy rain possible | 12° /9° | 0.1 mm | 3 | |
| 7 May | Partly cloudy | 13° /9° | 0 mm | 4 | |
| 8 May | Patchy rain possible | 11° /7° | 0.1 mm | 2 | |
| 9 May | Patchy rain possible | 11° /8° | 0.4 mm | 2 | |
| 10 May | Patchy rain possible | 11° /9° | 2.7 mm | 2 | |
| 11 May | Partly cloudy | 11° /7° | 0.1 mm | 3 | |
| 12 May | Patchy rain possible | 11° /9° | 2.7 mm | 3 | |
| 13 May | Partly cloudy | 12° /7° | 0.1 mm | 3 | |
| 14 May | Moderate rain at times | 15° /10° | 6 mm | 4 | |
| 15 May | Patchy rain possible | 16° /10° | 0.5 mm | 4 | |
| 16 May | Moderate or heavy rain shower | 16° /7° | 12.7 mm | 4 | |
| 17 May | Patchy rain possible | 15° /10° | 0.5 mm | 4 | |
| 18 May | Patchy rain possible | 17° /8° | 0.8 mm | 4 | |
| 19 May | Sunny | 19° /8° | 0 mm | 5 | |
| 20 May | Moderate or heavy rain shower | 17° /9° | 18.5 mm | 4 | |
| 21 May | Moderate or heavy rain shower | 17° /9° | 7.6 mm | 4 | |
| 22 May | Moderate or heavy rain shower | 12° /9° | 16 mm | 3 | |
| 23 May | Moderate rain at times | 9° /7° | 8.8 mm | 2 | |
| 24 May | Patchy rain possible | 11° /7° | 1.8 mm | 3 | |
| 25 May | Patchy rain possible | 15° /5° | 0.4 mm | 4 | |
| 26 May | Moderate or heavy rain shower | 12° /8° | 12.8 mm | 3 | |
| 27 May | Patchy rain possible | 12° /8° | 6.3 mm | 3 | |
| 28 May | Moderate or heavy rain shower | 12° /9° | 7.5 mm | 3 | |
| 29 May | Moderate rain at times | 13° /9° | 5.3 mm | 3 | |
| 30 May | Moderate rain at times | 14° /8° | 7.8 mm | 3 | |
| 31 May | Patchy rain possible | 15° /7° | 0.1 mm | 4 | |
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Important Notice
Our weather forecast for Gwynedd 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 Gwynedd forecast closer to your planned date for the most up-to-date weather information.
Gwynedd in May - FAQ
What are the expected maximum and minimum temperatures in Gwynedd during May?
During May, expect a variety of temperatures with highs around 15° and lows near 8°, suitable for diverse activities and preferences.
How much rainfall should be expected in Gwynedd during May?
Significant rainfall exceeding 144.1 mm is expected in Gwynedd during May, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Gwynedd during May?
The average wind speed in Gwynedd during May is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Gwynedd
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