Wales has a temperate climate with warm summers and mild winters.
Wales has an average annual temperature of 10.2°C across all 31 cities, with approximately 1002 mm of annual precipitation and average humidity of 87%. Temperatures peak in July and drop to their lowest in February, while rainfall is highest during winter months.
The warmest city is Caerphilly with average July highs of 20.1°C, while Ebbw Vale is the coldest with average January lows of 0.8°C. Humidity remains high throughout the year, especially during winter months, creating warm and humid conditions. These seasonal patterns offer comfortable conditions year-round, with warm summers and mild winters.
| Month | 🌤️ | Avg High | Avg Temp | Avg Low | Record High | Record Low | Humid % | Rain (mm) | Wind (m/s) | Solar (kWh/m²) |
|---|---|---|---|---|---|---|---|---|---|---|
| January | ⛅ | 7.0°C | 5.1°C | 3.2°C | 12.8°C | -14.0°C | 92% | 98 | 4.9 | 0.80 |
| February | 🌤️ | 7.1°C | 5.0°C | 2.9°C | 15.1°C | -11.7°C | 90% | 74 | 4.8 | 1.40 |
| March | 🌤️ | 9.0°C | 6.4°C | 3.8°C | 17.6°C | -8.3°C | 89% | 75 | 4.4 | 2.50 |
| April | 🌤️ | 11.4°C | 8.2°C | 5.1°C | 22.1°C | -4.0°C | 85% | 62 | 3.8 | 4.00 |
| May | 🌤️ | 14.6°C | 11.3°C | 7.9°C | 24.2°C | -1.8°C | 83% | 65 | 3.6 | 5.00 |
| June | 🌤️ | 17.2°C | 14.0°C | 10.8°C | 27.1°C | 0.6°C | 83% | 69 | 3.5 | 5.30 |
| July | ☀️ | 19.1°C | 16.0°C | 12.8°C | 31.0°C | 4.1°C | 83% | 72 | 3.4 | 5.10 |
| August | ☀️ | 19.0°C | 16.0°C | 13.0°C | 30.3°C | 4.2°C | 84% | 79 | 3.6 | 4.20 |
| September | ⛅ | 17.2°C | 14.3°C | 11.4°C | 26.6°C | 0.3°C | 85% | 82 | 3.9 | 3.10 |
| October | ⛅ | 13.9°C | 11.5°C | 9.1°C | 23.4°C | -3.9°C | 88% | 109 | 4.4 | 1.80 |
| November | ⛅ | 10.2°C | 8.2°C | 6.2°C | 17.1°C | -6.1°C | 90% | 105 | 4.5 | 0.90 |
| December | ⛅ | 7.8°C | 6.1°C | 4.3°C | 14.1°C | -10.1°C | 92% | 112 | 4.8 | 0.60 |
Showing average climate conditions across 45 years (1981–2025) · averaged across all 31 cities in Wales
🧥 Light layers are sufficient — this Mild Winter stays cool without prolonged hard freezes.
🌤️ Conditions are ideal for outdoor activities throughout the day in this Mild Summer.
☔ Moderate Rainfall expected — carry rain gear and plan outdoor activities around these months.
Region-wide monthly averages across 31 cities · 1981–2025 · °C
Temperatures rise steadily from spring, peak in July, and gradually decline through autumn into winter.
These seasonal patterns offer comfortable conditions year-round, with warm summers and mild winters.
Region-wide monthly rainfall · 1981–2025 · mm/month
💧 Humidity peaks at 92% in December · annual avg 87%
Monthly averages · 1981–2025
Across 45 years, Wales's temperature shows a slight warming trend over the past decade. 2023 was the warmest year overall and 1986 the coolest.
The warmest year on record was 2023 (avg: 11.3°C), while the coldest year was 1986 (avg: 8.6°C).
Averaged across all 31 cities in Wales · Last 30 years · °C
Averaged across all 31 cities in Wales · Last 30 years · mm/year
🔥 hottest · ❄️ coldest · 🌧️ wettest
ℹ️ Values are averages across all 31 cities in Wales for each year.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|---|---|
2025 🔥 | 14.0°C | 11.2°C | 8.3°C | 30.3°C | -4.0°C | 1009 | 86% | 3.9 m/s |
2024 | 13.4°C | 10.9°C | 8.4°C | 26.2°C | -6.2°C | 1183 | 88% | 4.0 m/s |
2023 | 13.9°C | 11.3°C | 8.6°C | 26.6°C | -3.8°C | 1197 | 87% | 4.1 m/s |
2022 | 14.0°C | 11.2°C | 8.4°C | 30.8°C | -7.9°C | 904 | 86% | 3.9 m/s |
2021 | 13.1°C | 10.5°C | 7.8°C | 27.3°C | -6.4°C | 1089 | 87% | 3.8 m/s |
2020 🌧️ | 13.4°C | 10.7°C | 8.0°C | 29.2°C | -2.7°C | 1307 | 87% | 4.4 m/s |
2019 | 13.1°C | 10.5°C | 7.9°C | 27.3°C | -3.6°C | 1223 | 87% | 4.0 m/s |
2018 | 13.3°C | 10.6°C | 7.8°C | 25.8°C | -8.5°C | 1031 | 87% | 4.0 m/s |
2017 | 13.2°C | 10.6°C | 8.0°C | 27.0°C | -6.7°C | 1023 | 87% | 4.1 m/s |
2016 | 12.9°C | 10.3°C | 7.7°C | 27.5°C | -3.2°C | 993 | 87% | 4.0 m/s |
Showing 1 to 10 of 45 years
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources), a NASA project providing solar and meteorological data for renewable energy, building efficiency, and agricultural research.
