Shell Rock climate

Shell Rock Weather in August

NOAA 1991-2020 normals for Allison, 18.5 km from Shell Rock

Average highs run from 82°F on August 1 to 78°F on August 31, and lows from 63°F to 57°F. Normal precipitation for the month is 4.04 in over about 8 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 Shell Rock, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
80°F
Average low
60°F
Precipitation
4.04 in
Record high
105°FAug 17, 1988
Record low
33°FAug 20, 1950
Chance of a freeze
0%
Days of 90°F or more
2.4
Daylight
14 h 29 min to 13 h 12 min
Cloud cover
51%
Humidity
74%
Dew point
62°F
Wind
8.1 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 182°F63°F101°F 198849°F 197725%0%
Aug 282°F62°F101°F 198849°F 196525%0%
Aug 382°F62°F100°F 198849°F 197125%0%
Aug 482°F62°F97°F 198945°F 197825%0%
Aug 582°F62°F93°F 196544°F 199425%0%
Aug 682°F62°F95°F 202245°F 201225%0%
Aug 782°F62°F99°F 198846°F 198925%0%
Aug 881°F62°F94°F 198345°F 197625%0%
Aug 981°F62°F95°F 198546°F 197225%0%
Aug 1081°F62°F96°F 198349°F 196725%0%
Aug 1181°F61°F96°F 198843°F 198225%0%
Aug 1281°F61°F94°F 199545°F 196425%0%
Aug 1381°F61°F95°F 196541°F 196425%0%
Aug 1481°F61°F101°F 198839°F 196424%0%
Aug 1581°F61°F104°F 198842°F 200424%0%
Aug 1681°F61°F103°F 198843°F 197625%0%
Aug 1780°F60°F105°F 198846°F 196225%0%
Aug 1880°F60°F98°F 198343°F 197724%0%
Aug 1980°F60°F100°F 198342°F 196324%0%
Aug 2080°F60°F98°F 200333°F 195024%0%
Aug 2180°F60°F97°F 195539°F 200424%0%
Aug 2280°F59°F99°F 202347°F 195124%0%
Aug 2380°F59°F105°F 202345°F 196924%0%
Aug 2479°F59°F103°F 202344°F 197724%0%
Aug 2579°F59°F98°F 200340°F 195824%0%
Aug 2679°F58°F98°F 202442°F 196424%0%
Aug 2779°F58°F96°F 195541°F 197124%0%
Aug 2879°F58°F97°F 195540°F 198624%0%
Aug 2979°F57°F98°F 198441°F 198824%0%
Aug 3079°F57°F96°F 201244°F 197424%0%
Aug 3178°F57°F99°F 200038°F 196724%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Shell Rock, 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 6:02 AM, sunset 8:31 PM
August 31
sunrise 6:34 AM, sunset 7:46 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00130157 (Allison), public domain. Records: NOAA GHCN-Daily, station USW00094910, 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.