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
1077 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.
Northern Ireland receives its highest rainfall in October, while humidity peaks during winter months.
🌧️ Wettest:October — 115 mm☀️ Driest:April — 69 mm
💧 Humidity peaks at 92% in December · annual avg 88%
📈 Northern Ireland Yearly Climate Trends
The warmest year in Northern Ireland's recorded history was 2025
(avg: 10.7°C),
while the coldest year was 1986
(avg: 8.3°C).
📊 Key Climate Trends
🌡️ Northern Ireland's temperature has remained relatively stable over the past decade
📊 Minimum temperatures have remained largely stable across the dataset
🌧️ Rainfall has decreased in recent years compared to earlier periods
🌡️ Annual Temperature Trend
View Range:
Averaged across all 13 cities in Northern Ireland · Last 10 years · °C
Northern Ireland's temperature has remained relatively stable over the past decade.
The nation-wide average sits at
9.6°C
with annual rainfall averaging 1076 mm.
🌧️ Annual Precipitation
View Range:
Averaged across all 13 cities in Northern Ireland · Last 10 years · mm/year
Annual rainfall in Northern Ireland shows noticeable variation. Rainfall has decreased in recent years compared to earlier periods.
📋 Yearly Climate Data Overview
🔥 hottest · ❄️ coldest · 🌧️ wettest
ℹ️ Values are averages across all 13 cities in Northern Ireland for each year.
Which city in Northern Ireland gets the most rain?▼
Derry is the wettest city in Northern Ireland with approximately 1238 mm of annual precipitation on average. View Derry weather history →
What is the warmest month in Northern Ireland?▼
July is the warmest month in Northern Ireland, with nation-wide average highs of 21.1°C and average lows of 8.7°C.
What is the coldest month in Northern Ireland?▼
January is the coldest month in Northern Ireland with average lows of -0.3°C and average highs of 10.9°C.
What is the rainiest month in Northern Ireland?▼
October is the rainiest month in Northern Ireland with approximately 115 mm on average, while April is the driest with 69 mm.
How many cities in Northern Ireland have weather data?▼
TownPillar has historical weather data for 13 cities in Northern Ireland, covering 45 years of climate records from 1981 to 2025.
Which month has the most sunshine in Northern Ireland?▼
June is the sunniest month across Northern Ireland with an average solar radiation of 4.80 kWh/m²/day. This is useful for solar energy planning and understanding seasonal sunshine availability.
Where does this climate data come from?▼
All data is sourced from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis data. It includes monthly temperature, precipitation, humidity, wind speed, and solar radiation at 0.5° × 0.625° spatial resolution.
📚 Data Source
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.