Monona County climate

Monona County Weather in August

NOAA 1991-2020 normals for Castana Exp Farm, 10.3 km from Monona County

Average highs run from 84°F on August 1 to 79°F on August 31, and lows from 63°F to 58°F. Normal precipitation for the month is 4.23 in over about 9 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 Monona County, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
82°F
Average low
61°F
Precipitation
4.23 in
Record high
101°FAug 30, 2000
Record low
42°FAug 14, 2004
Chance of a freeze
0%
Days of 90°F or more
3.2
Daylight
14 h 25 min to 13 h 11 min
Cloud cover
50%
Humidity
66%
Dew point
61°F
Wind
8.9 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°F63°F100°F 201254°F 200931%0%
Aug 283°F63°F100°F 202251°F 200231%0%
Aug 383°F63°F99°F 200250°F 201731%0%
Aug 483°F63°F96°F 200147°F 202031%0%
Aug 583°F63°F99°F 202452°F 201731%0%
Aug 683°F63°F100°F 202250°F 199731%0%
Aug 783°F63°F99°F 201257°F 199731%0%
Aug 883°F63°F95°F 200952°F 201731%0%
Aug 983°F62°F96°F 200550°F 202431%0%
Aug 1083°F62°F93°F 201647°F 202430%0%
Aug 1182°F62°F95°F 201045°F 200430%0%
Aug 1282°F62°F96°F 200050°F 200430%0%
Aug 1382°F62°F91°F 201046°F 200430%0%
Aug 1482°F62°F94°F 200042°F 200430%0%
Aug 1582°F62°F94°F 201248°F 200430%0%
Aug 1682°F61°F97°F 200351°F 200230%0%
Aug 1782°F61°F97°F 200347°F 201230%0%
Aug 1881°F61°F99°F 200347°F 200229%0%
Aug 1981°F61°F95°F 199842°F 200429%0%
Aug 2081°F61°F94°F 199850°F 201529%0%
Aug 2181°F60°F96°F 202348°F 200429%0%
Aug 2281°F60°F97°F 202349°F 200929%0%
Aug 2381°F60°F98°F 202351°F 200928%0%
Aug 2481°F60°F100°F 202345°F 201528%0%
Aug 2580°F60°F100°F 200345°F 202528%0%
Aug 2680°F59°F99°F 202448°F 202528%0%
Aug 2780°F59°F96°F 202052°F 200528%0%
Aug 2880°F59°F97°F 201250°F 201928%0%
Aug 2980°F59°F99°F 201245°F 200428%0%
Aug 3079°F58°F101°F 200047°F 200627%0%
Aug 3179°F58°F97°F 201244°F 200927%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Monona County, 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 6:17 AM, sunset 8:42 PM
August 31
sunrise 6:48 AM, sunset 7:59 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00131277 (Castana Exp Farm), public domain. Records: NOAA GHCN-Daily, station USW00094978, 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.