Northern Ireland climate and temperatures

The climate of Northern Ireland is Temperate oceanic climate (Köppen: Cfb), with mild summers and precipitation throughout the year. Monthly temperatures range from a minimum of 8°C in winter (December–February) to a maximum of 19°C in summer (June–August). The average annual temperature is around 14°C.

During the winter months, nighttime temperatures can drop to an average of 3°C, while summer nights average around 12°C.

Popular destinations in Northern Ireland

• Achill Island
• Inishmore
• Ardmillan
• Bangor
• Belfast
• Belfast
• Derry
• Drumnasoo
• Ederny
• Gortnalee
• Gransha
• Inishmore

View all destinations in Northern Ireland

Climate table of Northern Ireland

The climate table below gives you a clear overview of the climate in Northern Ireland by month, from average temperatures and rainfall to UV levels. This makes it easy to see when the weather best suits your travel plans.

Best time to visit Northern Ireland

The best time to visit Northern Ireland is June, July, August en September. During this period, temperatures are usually pleasant to warm and there is relatively little rainfall. Between June and September, average high temperatures range roughly from 18°C to 17°C, while rainfall remains limited. The warmest month is July, with an average daytime temperature of around 19°C. The driest month is April, with about 55 mm of rainfall, while December is usually the wettest month of the year, with approximately 101 mm. Snow is rare here, but may occasionally fall in January, February en March.

Average temperature per month

This chart shows the average daytime (maximum) and nighttime (minimum) temperatures per month in Northern Ireland. The figures are based on climate data from recent years and are presented in degrees Celsius, so you can clearly see the temperature range for each month.

Average rainfall per month

This chart shows the average monthly rainfall in Northern Ireland. The figures are based on long-term climate data and are displayed in millimeters, so you can immediately see which months are drier or wetter.

Average UV index per month

This chart shows the average monthly sun intensity in Northern Ireland. The UV index ranges from 0 (no UV radiation) to 11+ (extreme). A higher UV index means you can burn more quickly, making proper sun protection increasingly important.

Average annual temperature

This chart shows the average annual temperature in Northern Ireland based on data from the past ten years. It allows you to see at a glance how the climate is evolving and whether there are clear warming trends.

Average annual rainfall

This chart shows the average annual rainfall in Northern Ireland over the past ten years. It allows you to see at a glance how much rain falls each year and whether there are clear fluctuations between the years.

Weather experiences in Northern Ireland

The weather in Northern Ireland is rated an average of 4.3 out of 5 stars by 8 visitors. Have you been to Northern Ireland? Share your experience with the weather to help other visitors plan their trip.

Islands of Northern Ireland

• Achill Island
• Inishmore

Average weather per month

Click on a month below and discover what the weather in Northern Ireland is typically like. For each period, you can instantly see the average temperature, rainfall, wind, and UV index. Thanks to years of historical weather data, you’ll know exactly what to expect during your trip.

• January
• February
• March
• April
• May
• June
• July
• August
• September
• October
• November
• December