Annual Weather Averages in Eureka
Based on weather reports collected during 2012–2021.
All Year Climate & Weather Averages in Eureka
High Temp: 65 °F
Low Temp: 40 °F
Mean Temp: 53 °F
Precipitation: 3.21"
Humidity: 84%
Dew Point: 47 °F
Wind: 10 mph
Pressure: 37.78 "Hg
Visibility: 8 mi
January Climate & Weather Averages in Eureka
High Temp: 55 °F
Low Temp: 41 °F
Mean Temp: 48 °F
Precipitation: 6.47"
Humidity: 82%
Dew Point: 42 °F
Wind: 10 mph
Pressure: 42.95 "Hg
Visibility: 8 mi
February Climate & Weather Averages in Eureka
High Temp: 55 °F
Low Temp: 41 °F
Mean Temp: 48 °F
Precipitation: 5.31"
Humidity: 81%
Dew Point: 42 °F
Wind: 11 mph
Pressure: 45.12 "Hg
Visibility: 8 mi
March Climate & Weather Averages in Eureka
High Temp: 56 °F
Low Temp: 42 °F
Mean Temp: 49 °F
Precipitation: 6.15"
Humidity: 81%
Dew Point: 43 °F
Wind: 13 mph
Pressure: 46.06 "Hg
Visibility: 9 mi
April Climate & Weather Averages in Eureka
High Temp: 58 °F
Low Temp: 45 °F
Mean Temp: 52 °F
Precipitation: 2.97"
Humidity: 82%
Dew Point: 45 °F
Wind: 12 mph
Pressure: 36.71 "Hg
Visibility: 9 mi
May Climate & Weather Averages in Eureka
High Temp: 60 °F
Low Temp: 48 °F
Mean Temp: 54 °F
Precipitation: 1.30"
Humidity: 85%
Dew Point: 48 °F
Wind: 13 mph
Pressure: 33.25 "Hg
Visibility: 9 mi
June Climate & Weather Averages in Eureka
High Temp: 63 °F
Low Temp: 51 °F
Mean Temp: 57 °F
Precipitation: 0.54"
Humidity: 85%
Dew Point: 51 °F
Wind: 12 mph
Pressure: 33.30 "Hg
Visibility: 8 mi
July Climate & Weather Averages in Eureka
High Temp: 63 °F
Low Temp: 53 °F
Mean Temp: 58 °F
Precipitation: 0.17"
Humidity: 86%
Dew Point: 53 °F
Wind: 10 mph
Pressure: 33.22 "Hg
Visibility: 8 mi
August Climate & Weather Averages in Eureka
High Temp: 65 °F
Low Temp: 53 °F
Mean Temp: 59 °F
Precipitation: 0.10"
Humidity: 88%
Dew Point: 54 °F
Wind: 9 mph
Pressure: 36.37 "Hg
Visibility: 7 mi
September Climate & Weather Averages in Eureka
High Temp: 65 °F
Low Temp: 51 °F
Mean Temp: 58 °F
Precipitation: 1.30"
Humidity: 85%
Dew Point: 52 °F
Wind: 9 mph
Pressure: 39.84 "Hg
Visibility: 8 mi
October Climate & Weather Averages in Eureka
High Temp: 62 °F
Low Temp: 47 °F
Mean Temp: 55 °F
Precipitation: 2.94"
Humidity: 82%
Dew Point: 48 °F
Wind: 9 mph
Pressure: 36.40 "Hg
Visibility: 8 mi
November Climate & Weather Averages in Eureka
High Temp: 59 °F
Low Temp: 44 °F
Mean Temp: 51 °F
Precipitation: 4.38"
Humidity: 83%
Dew Point: 45 °F
Wind: 9 mph
Pressure: 40.01 "Hg
Visibility: 8 mi
December Climate & Weather Averages in Eureka
High Temp: 55 °F
Low Temp: 40 °F
Mean Temp: 47 °F
Precipitation: 6.86"
Humidity: 82%
Dew Point: 42 °F
Wind: 10 mph
Pressure: 30.12 "Hg
Visibility: 8 mi