Average humidity in Belfast

On this page you find more information about the monthly relative humidity over the year in Belfast (County Antrim), Ireland.

Belfast's humidity levels vary throughout the year. The highest levels occur in September, reaching 91% (very high), while the lowest is recorded in February at 86%.

Throughout the year, the average humidity in Belfast is 89%.

Humidity plays an important role in how temperatures are felt. During the warmest month, July, the maximum average temperature is around 20°C.

During the coldest month, January, the maximum average temperature is around 9°C. This period has very high humidity. When winter temperatures are low and humidity is high, it can make the air feel even colder than it actually is. Check out our detailed temperature page for more information.