Eureka climate

Eureka Weather in September

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

Average highs run from 84°F on September 1 to 72°F on September 30, and lows from 57°F to 45°F. Normal precipitation for the month is 1.19 in over about 5 wet days.

September 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

September at a glance

Average high
78°F
Average low
51°F
Precipitation
1.19 in
Snowfall
0.1 in
Record high
106°FSep 4, 1950
Record low
23°FSep 18, 1965
Chance of a freeze
16%
Days of 90°F or more
2.5
Daylight
13 h 04 min to 11 h 48 min
Cloud cover
39%
Humidity
39%
Dew point
34°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
Sep 184°F57°F103°F 195039°F 196215%0%
Sep 284°F56°F103°F 195037°F 197315%0%
Sep 383°F56°F104°F 195035°F 196115%0%
Sep 483°F55°F106°F 195038°F 196115%0%
Sep 583°F55°F103°F 195039°F 199915%0%
Sep 682°F55°F100°F 202236°F 201016%0%
Sep 782°F54°F101°F 202241°F 200116%0%
Sep 881°F54°F98°F 195536°F 202016%0%
Sep 981°F54°F95°F 202132°F 196216%0%
Sep 1081°F53°F95°F 199037°F 194516%0%
Sep 1180°F53°F97°F 195936°F 194716%0%
Sep 1280°F52°F97°F 199034°F 197416%0%
Sep 1379°F52°F98°F 199034°F 196717%0%
Sep 1479°F52°F97°F 199030°F 199317%0%
Sep 1579°F51°F95°F 200033°F 199117%0%
Sep 1678°F51°F94°F 195234°F 197017%0%
Sep 1778°F50°F94°F 195230°F 196517%0%
Sep 1877°F50°F91°F 195223°F 196517%0%
Sep 1977°F50°F93°F 196225°F 197817%0%
Sep 2076°F49°F94°F 195226°F 197817%0%
Sep 2176°F49°F92°F 195326°F 197817%0%
Sep 2275°F48°F91°F 195327°F 196817%0%
Sep 2375°F48°F91°F 194327°F 196817%0%
Sep 2474°F47°F94°F 196629°F 194517%0%
Sep 2574°F47°F92°F 194727°F 195817%0%
Sep 2674°F46°F90°F 194728°F 197017%0%
Sep 2773°F46°F94°F 195231°F 199617%0%
Sep 2873°F46°F92°F 195228°F 199917%0%
Sep 2972°F45°F91°F 202425°F 198517%0%
Sep 3072°F45°F91°F 195726°F 198517%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.051015201102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MDT).

September 1
sunrise 6:56 AM, sunset 8:00 PM
September 30
sunrise 7:24 AM, sunset 7:12 PM

Every day of September: 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.