Eureka climate

Eureka Weather in August

NOAA 1991-2020 normals for Santaquin Chlorinator, 29 km from Eureka

Average highs run from 91°F on August 1 to 84°F on August 31, and lows from 64°F to 57°F. Normal precipitation for the month is 0.76 in over about 4 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
88°F
Average low
61°F
Precipitation
0.76 in
Record high
109°FAug 8, 1958
Record low
35°FAug 31, 1943
Chance of a freeze
0%
Days of 90°F or more
17.8
Daylight
14 h 15 min to 13 h 05 min
Cloud cover
43%
Humidity
36%
Dew point
41°F
Wind
6.7 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°F64°F103°F 195146°F 199512%0%
Aug 291°F64°F102°F 202047°F 197512%0%
Aug 391°F64°F102°F 194646°F 194413%0%
Aug 491°F63°F102°F 199445°F 194413%0%
Aug 591°F63°F102°F 194944°F 199613%0%
Aug 691°F63°F104°F 195244°F 198913%0%
Aug 790°F63°F103°F 195840°F 199613%0%
Aug 890°F63°F109°F 195844°F 199613%0%
Aug 990°F63°F102°F 199046°F 200913%0%
Aug 1090°F62°F100°F 197245°F 197513%0%
Aug 1190°F62°F102°F 197245°F 194713%0%
Aug 1289°F62°F102°F 199642°F 198513%0%
Aug 1389°F62°F101°F 199647°F 198513%0%
Aug 1489°F62°F101°F 195847°F 199313%0%
Aug 1589°F61°F101°F 196240°F 197813%0%
Aug 1689°F61°F104°F 196245°F 196813%0%
Aug 1788°F61°F101°F 195141°F 196013%0%
Aug 1888°F61°F102°F 198640°F 196813%0%
Aug 1988°F60°F102°F 198637°F 198013%0%
Aug 2088°F60°F101°F 202538°F 198013%0%
Aug 2187°F60°F99°F 196038°F 194513%0%
Aug 2287°F60°F100°F 202038°F 196413%0%
Aug 2387°F59°F101°F 195037°F 196814%0%
Aug 2486°F59°F98°F 195042°F 196214%0%
Aug 2586°F59°F101°F 198538°F 198914%0%
Aug 2686°F58°F100°F 196938°F 199214%0%
Aug 2786°F58°F97°F 195837°F 199214%0%
Aug 2885°F58°F98°F 198542°F 197814%0%
Aug 2985°F57°F101°F 199038°F 196414%0%
Aug 3085°F57°F100°F 195438°F 196414%0%
Aug 3184°F57°F102°F 195435°F 194315%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.0510151102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MDT).

August 1
sunrise 6:27 AM, sunset 8:42 PM
August 31
sunrise 6:56 AM, sunset 8:01 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00427686 (Santaquin Chlorinator), public domain. Records: NOAA GHCN-Daily, station USC00426135, 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.