Annual Weather Averages in Eureka
Based on weather reports collected during 1985–2015.
All Year Climate & Weather Averages in Eureka
High Temp: 49 °F
Low Temp: -42 °F
Mean Temp: -1 °F
Precipitation: 0.12"
Humidity: 70%
Dew Point: -9 °F
Wind: 6 mph
Pressure: 29.96 "Hg
Visibility: 21 mi
January Climate & Weather Averages in Eureka
High Temp: -28 °F
Low Temp: -41 °F
Mean Temp: -34 °F
Precipitation: 0.08"
Humidity: 65%
Dew Point: -41 °F
Wind: 4 mph
Pressure: 29.90 "Hg
Visibility: 13 mi
February Climate & Weather Averages in Eureka
High Temp: -28 °F
Low Temp: -42 °F
Mean Temp: -35 °F
Precipitation: 0.10"
Humidity: 67%
Dew Point: -42 °F
Wind: 4 mph
Pressure: 29.99 "Hg
Visibility: 14 mi
March Climate & Weather Averages in Eureka
High Temp: -28 °F
Low Temp: -41 °F
Mean Temp: -34 °F
Precipitation: 0.07"
Humidity: 66%
Dew Point: -41 °F
Wind: 4 mph
Pressure: 30.08 "Hg
Visibility: 17 mi
April Climate & Weather Averages in Eureka
High Temp: -7 °F
Low Temp: -23 °F
Mean Temp: -15 °F
Precipitation: 0.05"
Humidity: 65%
Dew Point: -24 °F
Wind: 4 mph
Pressure: 30.15 "Hg
Visibility: 24 mi
May Climate & Weather Averages in Eureka
High Temp: 20 °F
Low Temp: 8 °F
Mean Temp: 14 °F
Precipitation: 0.03"
Humidity: 74%
Dew Point: 7 °F
Wind: 7 mph
Pressure: 30.09 "Hg
Visibility: 28 mi
June Climate & Weather Averages in Eureka
High Temp: 42 °F
Low Temp: 33 °F
Mean Temp: 38 °F
Precipitation: 0.11"
Humidity: 72%
Dew Point: 29 °F
Wind: 11 mph
Pressure: 29.92 "Hg
Visibility: 32 mi
July Climate & Weather Averages in Eureka
High Temp: 49 °F
Low Temp: 37 °F
Mean Temp: 43 °F
Precipitation: 0.26"
Humidity: 71%
Dew Point: 34 °F
Wind: 11 mph
Pressure: 29.83 "Hg
Visibility: 33 mi
August Climate & Weather Averages in Eureka
High Temp: 42 °F
Low Temp: 34 °F
Mean Temp: 38 °F
Precipitation: 0.29"
Humidity: 78%
Dew Point: 31 °F
Wind: 9 mph
Pressure: 29.82 "Hg
Visibility: 30 mi
September Climate & Weather Averages in Eureka
High Temp: 26 °F
Low Temp: 16 °F
Mean Temp: 21 °F
Precipitation: 0.13"
Humidity: 82%
Dew Point: 17 °F
Wind: 7 mph
Pressure: 29.88 "Hg
Visibility: 21 mi
October Climate & Weather Averages in Eureka
High Temp: 2 °F
Low Temp: -12 °F
Mean Temp: -5 °F
Precipitation: 0.14"
Humidity: 72%
Dew Point: -11 °F
Wind: 4 mph
Pressure: 30.00 "Hg
Visibility: 16 mi
November Climate & Weather Averages in Eureka
High Temp: -13 °F
Low Temp: -27 °F
Mean Temp: -20 °F
Precipitation: 0.08"
Humidity: 65%
Dew Point: -29 °F
Wind: 4 mph
Pressure: 29.96 "Hg
Visibility: 14 mi
December Climate & Weather Averages in Eureka
High Temp: -22 °F
Low Temp: -35 °F
Mean Temp: -29 °F
Precipitation: 0.08"
Humidity: 64%
Dew Point: -37 °F
Wind: 4 mph
Pressure: 29.93 "Hg
Visibility: 13 mi