Eureka climate

Eureka Weather in August

NOAA 1991-2020 normals for Eureka 1E, 2.2 km from Eureka

Average highs run from 91°F on August 1 to 87°F on August 31, and lows from 67°F to 62°F. Normal precipitation for the month is 4.07 in over about 7 wet days.

August day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Eureka, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
90°F
Average low
65°F
Precipitation
4.07 in
Record high
115°FAug 9, 1936
Record low
42°FAug 31, 1915
Chance of a freeze
0%
Days of 90°F or more
16.8
Daylight
14 h 05 min to 13 h 02 min
Cloud cover
46%
Humidity
66%
Dew point
64°F
Wind
8.5 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Aug 191°F67°F111°F 198054°F 197124%0%
Aug 291°F67°F110°F 193454°F 200924%0%
Aug 391°F67°F110°F 196453°F 197324%0%
Aug 491°F67°F108°F 191849°F 197424%0%
Aug 591°F67°F109°F 191854°F 191524%0%
Aug 691°F67°F112°F 195654°F 195724%0%
Aug 791°F67°F110°F 195653°F 200424%0%
Aug 891°F66°F109°F 193451°F 198924%0%
Aug 991°F66°F115°F 193652°F 193924%0%
Aug 1091°F66°F111°F 193655°F 191724%0%
Aug 1190°F66°F111°F 193454°F 196523%0%
Aug 1290°F66°F112°F 193646°F 196423%0%
Aug 1390°F66°F111°F 193650°F 200423%0%
Aug 1490°F66°F112°F 193648°F 192023%0%
Aug 1590°F66°F111°F 193650°F 192023%0%
Aug 1690°F65°F111°F 195652°F 200423%0%
Aug 1790°F65°F110°F 195653°F 199223%0%
Aug 1890°F65°F110°F 195648°F 194323%0%
Aug 1989°F65°F106°F 193652°F 200123%0%
Aug 2089°F65°F110°F 202348°F 194022%0%
Aug 2189°F64°F111°F 202347°F 193922%0%
Aug 2289°F64°F109°F 202350°F 200422%0%
Aug 2389°F64°F109°F 193648°F 193922%0%
Aug 2488°F64°F110°F 193652°F 191722%0%
Aug 2588°F64°F107°F 193649°F 195822%0%
Aug 2688°F63°F106°F 195446°F 191022%0%
Aug 2788°F63°F107°F 195443°F 191022%0%
Aug 2888°F63°F108°F 195445°F 191622%0%
Aug 2987°F62°F108°F 195443°F 191122%0%
Aug 3087°F62°F108°F 193945°F 191122%0%
Aug 3187°F62°F105°F 191342°F 191522%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Eureka, in percent, and of at least 0.1 inch of snowfall.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

August 1
sunrise 6:29 AM, sunset 8:34 PM
August 31
sunrise 6:54 AM, sunset 7:56 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00142622 (Eureka 1E), public domain. Records: NOAA GHCN-Daily, station USC00142622, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.