Northern Ireland has a temperate climate with warm summers and mild winters.
Northern Ireland has an average annual temperature of 9.3°C across all 13 cities, with approximately 1092 mm of annual precipitation and average humidity of 88%. Temperatures peak in July and drop to their lowest in February, while rainfall is highest during autumn months.
The warmest city is Dungannon with average July highs of 18.2°C, while Dungannon is the coldest with average January lows of 1.7°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 | ⛅ | 6.6°C | 5.0°C | 3.3°C | 12.9°C | -8.0°C | 92% | 100 | 5.5 | 0.60 |
| February | 🌤️ | 6.9°C | 5.0°C | 3.1°C | 13.8°C | -6.1°C | 90% | 80 | 5.5 | 1.20 |
| March | ⛅ | 8.3°C | 6.0°C | 3.8°C | 17.1°C | -6.4°C | 89% | 83 | 4.9 | 2.30 |
| April | 🌤️ | 10.2°C | 7.6°C | 5.0°C | 20.9°C | -3.2°C | 86% | 69 | 4.2 | 3.70 |
| May | 🌤️ | 13.1°C | 10.2°C | 7.3°C | 23.0°C | -1.6°C | 85% | 71 | 3.9 | 4.80 |
| June | ⛅ | 15.5°C | 12.6°C | 9.8°C | 26.4°C | 2.2°C | 85% | 81 | 3.7 | 4.80 |
| July | ⛅ | 17.1°C | 14.3°C | 11.5°C | 27.3°C | 5.2°C | 86% | 88 | 3.5 | 4.50 |
| August | ⛅ | 17.0°C | 14.3°C | 11.6°C | 25.6°C | 4.5°C | 87% | 98 | 3.8 | 3.80 |
| September | ⛅ | 15.3°C | 12.8°C | 10.2°C | 25.1°C | 2.2°C | 88% | 92 | 4.3 | 2.70 |
| October | ⛅ | 12.3°C | 10.3°C | 8.2°C | 20.1°C | -2.2°C | 89% | 116 | 4.9 | 1.50 |
| November | ⛅ | 9.3°C | 7.5°C | 5.8°C | 16.6°C | -3.4°C | 91% | 106 | 5.0 | 0.70 |
| December | ⛅ | 7.4°C | 5.7°C | 4.1°C | 13.7°C | -7.9°C | 92% | 108 | 5.2 | 0.40 |
Showing average climate conditions across 45 years (1981–2025) · averaged across all 13 cities in Northern Ireland
🧥 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 13 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 88%
Monthly averages · 1981–2025
Across 45 years, Northern Ireland's temperature has remained relatively stable over the past decade. 2023 was the warmest year overall and 1986 the coolest.
The warmest year on record was 2023 (avg: 10.4°C), while the coldest year was 1986 (avg: 7.8°C).
Averaged across all 13 cities in Northern Ireland · Last 30 years · °C
Averaged across all 13 cities in Northern Ireland · Last 30 years · mm/year
🔥 hottest · ❄️ coldest · 🌧️ wettest
ℹ️ Values are averages across all 13 cities in Northern Ireland for each year.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|---|---|
2025 🔥 | 12.7°C | 10.3°C | 7.9°C | 25.8°C | -2.5°C | 1052 | 88% | 4.3 m/s |
2024 | 12.3°C | 10.0°C | 7.6°C | 23.2°C | -2.5°C | 1033 | 89% | 4.5 m/s |
2023 | 12.7°C | 10.4°C | 8.1°C | 25.1°C | -3.3°C | 1263 | 89% | 4.3 m/s |
2022 | 12.5°C | 10.1°C | 7.7°C | 27.3°C | -2.6°C | 1049 | 88% | 4.5 m/s |
2021 | 12.1°C | 9.8°C | 7.5°C | 26.9°C | -2.8°C | 1051 | 88% | 4.1 m/s |
2020 | 11.8°C | 9.5°C | 7.2°C | 23.3°C | -2.0°C | 1290 | 88% | 4.7 m/s |
2019 | 11.8°C | 9.6°C | 7.3°C | 24.0°C | -3.2°C | 1156 | 88% | 4.4 m/s |
2018 | 11.8°C | 9.4°C | 7.0°C | 26.4°C | -3.9°C | 1067 | 88% | 4.4 m/s |
2017 | 11.9°C | 9.6°C | 7.2°C | 22.9°C | -2.8°C | 1137 | 89% | 4.5 m/s |
2016 | 11.6°C | 9.4°C | 7.1°C | 24.6°C | -1.9°C | 1047 | 89% | 4.3 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.
