Northern Ireland has a temperate climate with warm summers and cold winters.
Northern Ireland has an average annual temperature of 9.6°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 January, while rainfall is highest during autumn months.
The warmest city is Dungannon with average July highs of 22.9°C, while Dungannon is the coldest with average January lows of -2.8°C. Humidity remains high throughout the year, especially during winter months, creating cold and damp conditions. These seasonal patterns make summer pleasant for travel, while winters can bring frost and occasional snowfall.
| Month | 🌤️ | High | Low | Avg | Humid % | Rain (mm) | Wind (m/s) | Solar (kWh/m²) |
|---|---|---|---|---|---|---|---|---|
| January | ⛅ | 10.9°C | -0.3°C | 5.3°C | 92% | 100 | 5.5 | 0.60 |
| February | 🌤️ | 10.5°C | 0.0°C | 5.2°C | 90% | 80 | 5.5 | 1.20 |
| March | ⛅ | 12.0°C | 0.3°C | 6.2°C | 89% | 83 | 4.9 | 2.30 |
| April | 🌤️ | 14.4°C | 1.4°C | 7.9°C | 86% | 69 | 4.2 | 3.70 |
| May | 🌤️ | 17.7°C | 3.9°C | 10.8°C | 85% | 71 | 3.9 | 4.80 |
| June | ⛅ | 19.9°C | 6.6°C | 13.3°C | 85% | 81 | 3.7 | 4.80 |
| July | ⛅ | 21.1°C | 8.7°C | 14.9°C | 86% | 88 | 3.5 | 4.50 |
| August | ⛅ | 20.4°C | 8.8°C | 14.6°C | 87% | 98 | 3.8 | 3.80 |
| September | ⛅ | 19.0°C | 7.0°C | 13.0°C | 88% | 92 | 4.3 | 2.70 |
| October | ⛅ | 16.1°C | 4.4°C | 10.3°C | 89% | 116 | 4.9 | 1.50 |
| November | ⛅ | 13.2°C | 1.9°C | 7.5°C | 91% | 106 | 5.0 | 0.70 |
| December | ⛅ | 11.5°C | 0.6°C | 6.0°C | 92% | 108 | 5.2 | 0.40 |
Showing average climate conditions across 45 years (1981–2025) · averaged across all 13 cities in Northern Ireland
🧥 Expect frosty nights and below-freezing temperatures during this Cold Winter period.
🌤️ 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 make summer pleasant for travel, while winters can bring frost and occasional snowfall.
Region-wide monthly rainfall · 1981–2025 · mm/month
Monthly averages · 1981–2025
💧 Humidity peaks at 92% in December · annual avg 88%
The warmest year on record was 2025 (avg: 10.7°C), while the coldest year was 1986 (avg: 8.3°C).
Averaged across all 13 cities in Northern Ireland · Last 10 years · °C
Averaged across all 13 cities in Northern Ireland · Last 10 years · mm/year
🔥 hottest · ❄️ coldest · 🌧️ wettest
ℹ️ Values are averages across all 13 cities in Northern Ireland for each year.
| Year | Min Temp | Avg Temp | Max Temp | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|
2025 🔥 | 4.3°C | 10.7°C | 17.0°C | 1052 | 88% | 4.3 m/s |
2024 | 4.4°C | 10.2°C | 16.0°C | 1033 | 89% | 4.5 m/s |
2023 | 4.5°C | 10.6°C | 16.6°C | 1263 | 89% | 4.3 m/s |
2022 | 4.7°C | 10.5°C | 16.3°C | 1049 | 88% | 4.5 m/s |
2021 | 4.2°C | 10.3°C | 16.3°C | 1051 | 88% | 4.1 m/s |
2020 | 3.9°C | 9.8°C | 15.7°C | 1290 | 88% | 4.7 m/s |
2019 | 3.8°C | 9.8°C | 15.8°C | 1156 | 88% | 4.4 m/s |
2018 | 3.2°C | 9.7°C | 16.1°C | 1067 | 88% | 4.4 m/s |
2017 | 4.1°C | 9.8°C | 15.5°C | 1137 | 89% | 4.5 m/s |
2016 | 4.1°C | 9.9°C | 15.7°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.
