Eureka climate

Eureka Weather in August

NOAA 1991-2020 normals for Eureka, 0.4 km from Eureka

Average highs run from 83°F on August 1 to 78°F on August 31, and lows from 58°F to 52°F. Normal precipitation for the month is 2.24 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.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
81°F
Average low
56°F
Precipitation
2.24 in
Record high
108°FAug 23, 2003
Record low
35°FAug 19, 2004
Chance of a freeze
0%
Days of 90°F or more
4.7
Daylight
14 h 45 min to 13 h 20 min
Cloud cover
48%
Humidity
60%
Dew point
53°F
Wind
10.1 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 183°F58°F102°F 201148°F 200925%0%
Aug 283°F58°F106°F 202249°F 200225%0%
Aug 383°F58°F100°F 201651°F 200925%0%
Aug 483°F58°F99°F 200645°F 200925%0%
Aug 583°F58°F103°F 202246°F 201225%0%
Aug 683°F58°F103°F 200550°F 200625%0%
Aug 783°F57°F103°F 200152°F 201725%0%
Aug 883°F57°F102°F 200147°F 202424%0%
Aug 982°F57°F100°F 200645°F 202424%0%
Aug 1082°F57°F103°F 201842°F 200424%0%
Aug 1182°F57°F101°F 201848°F 200424%0%
Aug 1282°F57°F102°F 201849°F 200424%0%
Aug 1382°F57°F100°F 200744°F 200424%0%
Aug 1482°F56°F98°F 200345°F 200424%0%
Aug 1582°F56°F100°F 200350°F 202023%0%
Aug 1681°F56°F101°F 200347°F 201023%0%
Aug 1781°F56°F105°F 200344°F 201223%0%
Aug 1881°F56°F101°F 202140°F 200423%0%
Aug 1981°F55°F98°F 202035°F 200423%0%
Aug 2081°F55°F101°F 201348°F 200423%0%
Aug 2180°F55°F96°F 201049°F 200422%0%
Aug 2280°F55°F104°F 201047°F 201722%0%
Aug 2380°F54°F108°F 200344°F 200822%0%
Aug 2480°F54°F101°F 201343°F 201522%0%
Aug 2579°F54°F100°F 200341°F 202522%0%
Aug 2679°F54°F96°F 199945°F 201422%0%
Aug 2779°F53°F106°F 201046°F 200522%0%
Aug 2879°F53°F95°F 201247°F 200422%0%
Aug 2978°F53°F106°F 201245°F 200022%0%
Aug 3078°F52°F98°F 200841°F 200322%0%
Aug 3178°F52°F95°F 200249°F 201022%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.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

August 1
sunrise 6:22 AM, sunset 9:07 PM
August 31
sunrise 6:58 AM, sunset 8:18 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00392797 (Eureka), public domain. Records: NOAA GHCN-Daily, station USW00094052, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.