Average Humidity for Ireland in September

The average humidity levels during morning and afternoon in September are listed below for cities and other places across Ireland.

Relative humidity measures the actual amount of moisture in the air as a percentage of the maximum amount of moisture the air can hold.

All the numbers here are based on weather data collected from 1981 to 2010.

You can jump to a separate table for each region of the country: Ulster, Munster, Leinster and Connacht. Ulster province includes the counties that border Northern Ireland. Munster province covers the southern part of Ireland. Leinster province is in the east, while Connacht (or Connaught) is in the west.

Ulster

Average September humidity

Place	9 am	3 pm
Clones	87	73
Malin Head	83	78

Munster

September relative humidity averages

Place	9 am	3 pm
Cork	88	75
Roches Point	86	77
Shannon	85	69
Valentia	84	77

Leinster

Average humidity in September

Place	9 am	3 pm
Birr	87	70
Clondalkin	85	72
Dublin	83	72
Kilkenny	85	68
Mullingar	88	72
Wexford	84	77

Connacht

September relative humidity

Place	9 am	3 pm
Belmullet	85	78
Claremorris	88	75