Decorah climate

Decorah Weather in August

NOAA 1991-2020 normals for Decorah, 0.8 km from Decorah

Average highs run from 84°F on August 1 to 81°F on August 31, and lows from 62°F to 58°F. Normal precipitation for the month is 4.39 in over about 10 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 Decorah, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
83°F
Average low
61°F
Precipitation
4.39 in
Record high
105°FAug 23, 2023
Record low
32°FAug 30, 1915
Chance of a freeze
0%
Days of 90°F or more
2.6
Daylight
14 h 32 min to 13 h 14 min
Cloud cover
53%
Humidity
76%
Dew point
60°F
Wind
8.3 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 184°F62°F100°F 198840°F 192733%0%
Aug 284°F62°F101°F 196440°F 192733%0%
Aug 384°F62°F101°F 193040°F 189433%0%
Aug 484°F62°F98°F 189642°F 191233%0%
Aug 584°F62°F97°F 190942°F 199433%0%
Aug 684°F62°F101°F 193144°F 195732%0%
Aug 784°F62°F102°F 189446°F 199332%0%
Aug 884°F62°F102°F 189439°F 190432%0%
Aug 983°F62°F101°F 193636°F 192732%0%
Aug 1083°F62°F97°F 190041°F 192732%0%
Aug 1183°F62°F98°F 192341°F 193032%0%
Aug 1283°F62°F101°F 193642°F 193132%0%
Aug 1383°F61°F97°F 190045°F 193132%0%
Aug 1483°F61°F97°F 190036°F 196432%0%
Aug 1583°F61°F103°F 193637°F 192932%0%
Aug 1683°F61°F104°F 193741°F 199232%0%
Aug 1783°F61°F100°F 198842°F 196232%0%
Aug 1883°F61°F102°F 193643°F 196332%0%
Aug 1983°F61°F97°F 191640°F 192931%0%
Aug 2083°F60°F97°F 191637°F 195031%0%
Aug 2182°F60°F104°F 195538°F 200431%0%
Aug 2282°F60°F97°F 191640°F 192331%0%
Aug 2382°F60°F105°F 202341°F 192031%0%
Aug 2482°F60°F105°F 202335°F 192731%0%
Aug 2582°F59°F99°F 194835°F 195831%0%
Aug 2682°F59°F97°F 202437°F 193431%0%
Aug 2782°F59°F98°F 202439°F 189631%0%
Aug 2881°F59°F98°F 195539°F 193531%0%
Aug 2981°F59°F95°F 194833°F 193431%0%
Aug 3081°F58°F96°F 193732°F 191531%0%
Aug 3181°F58°F97°F 193732°F 191531%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Decorah, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

August 1
sunrise 5:57 AM, sunset 8:29 PM
August 31
sunrise 6:30 AM, sunset 7:44 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00132110 (Decorah), public domain. Records: NOAA GHCN-Daily, station USC00132110, 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.