Currently: 66 °F. Scattered clouds. (Weather station: Castlederg, Ireland). See more current weatherAnnual Weather Averages in Castlederg
Castlederg is 21 miles from Ulster, so the actual climate in Ulster can vary a bit.
Based on weather reports collected during 2012–2021.
All Year Climate & Weather Averages in Ulster
High Temp: 67 °F
Low Temp: 35 °F
Mean Temp: 49 °F
Precipitation: 4.15"
Humidity: 85%
Dew Point: 44 °F
Wind: 15 mph
Pressure: 29.88 "Hg
Visibility: 15 mi
January Climate & Weather Averages in Ulster
High Temp: 46 °F
Low Temp: 35 °F
Mean Temp: 40 °F
Precipitation: 5.54"
Humidity: 90%
Dew Point: 38 °F
Wind: 17 mph
Pressure: 29.79 "Hg
Visibility: 13 mi
February Climate & Weather Averages in Ulster
High Temp: 47 °F
Low Temp: 35 °F
Mean Temp: 41 °F
Precipitation: 5.02"
Humidity: 88%
Dew Point: 38 °F
Wind: 19 mph
Pressure: 29.80 "Hg
Visibility: 14 mi
March Climate & Weather Averages in Ulster
High Temp: 50 °F
Low Temp: 36 °F
Mean Temp: 43 °F
Precipitation: 3.61"
Humidity: 84%
Dew Point: 38 °F
Wind: 17 mph
Pressure: 29.92 "Hg
Visibility: 14 mi
April Climate & Weather Averages in Ulster
High Temp: 54 °F
Low Temp: 37 °F
Mean Temp: 45 °F
Precipitation: 2.34"
Humidity: 80%
Dew Point: 40 °F
Wind: 15 mph
Pressure: 29.96 "Hg
Visibility: 15 mi
May Climate & Weather Averages in Ulster
High Temp: 59 °F
Low Temp: 42 °F
Mean Temp: 51 °F
Precipitation: 3.37"
Humidity: 79%
Dew Point: 45 °F
Wind: 14 mph
Pressure: 29.96 "Hg
Visibility: 16 mi
June Climate & Weather Averages in Ulster
High Temp: 64 °F
Low Temp: 48 °F
Mean Temp: 56 °F
Precipitation: 3.65"
Humidity: 81%
Dew Point: 50 °F
Wind: 13 mph
Pressure: 29.96 "Hg
Visibility: 17 mi
July Climate & Weather Averages in Ulster
High Temp: 67 °F
Low Temp: 51 °F
Mean Temp: 59 °F
Precipitation: 3.73"
Humidity: 82%
Dew Point: 53 °F
Wind: 12 mph
Pressure: 29.94 "Hg
Visibility: 18 mi
August Climate & Weather Averages in Ulster
High Temp: 65 °F
Low Temp: 51 °F
Mean Temp: 58 °F
Precipitation: 4.78"
Humidity: 85%
Dew Point: 53 °F
Wind: 13 mph
Pressure: 29.88 "Hg
Visibility: 17 mi
September Climate & Weather Averages in Ulster
High Temp: 62 °F
Low Temp: 47 °F
Mean Temp: 54 °F
Precipitation: 3.42"
Humidity: 87%
Dew Point: 50 °F
Wind: 13 mph
Pressure: 29.96 "Hg
Visibility: 14 mi
October Climate & Weather Averages in Ulster
High Temp: 56 °F
Low Temp: 42 °F
Mean Temp: 49 °F
Precipitation: 4.11"
Humidity: 88%
Dew Point: 46 °F
Wind: 14 mph
Pressure: 29.84 "Hg
Visibility: 14 mi
November Climate & Weather Averages in Ulster
High Temp: 49 °F
Low Temp: 38 °F
Mean Temp: 44 °F
Precipitation: 4.53"
Humidity: 91%
Dew Point: 41 °F
Wind: 14 mph
Pressure: 29.82 "Hg
Visibility: 14 mi
December Climate & Weather Averages in Ulster
High Temp: 47 °F
Low Temp: 37 °F
Mean Temp: 42 °F
Precipitation: 5.73"
Humidity: 90%
Dew Point: 40 °F
Wind: 17 mph
Pressure: 29.76 "Hg
Visibility: 13 mi