Winchester climate

Winchester Weather in August

NOAA 1991-2020 normals for Oskaloosa 4 Ne, 8.9 km from Winchester

Average highs run from 90°F on August 1 to 85°F on August 31, and lows from 68°F to 63°F. Normal precipitation for the month is 4.76 in over about 7 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 Winchester, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
88°F
Average low
66°F
Precipitation
4.76 in
Record high
112°FAug 24, 2023
Record low
46°FAug 20, 2012
Chance of a freeze
0%
Days of 90°F or more
13.5
Daylight
14 h 12 min to 13 h 04 min
Cloud cover
48%
Humidity
68%
Dew point
64°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 190°F68°F107°F 201155°F 201825%0%
Aug 290°F68°F111°F 201154°F 200924%0%
Aug 390°F68°F101°F 200254°F 202124%0%
Aug 490°F68°F101°F 200851°F 201724%0%
Aug 590°F68°F103°F 200055°F 201724%0%
Aug 690°F68°F105°F 200653°F 201224%0%
Aug 790°F67°F104°F 201251°F 199724%0%
Aug 890°F67°F104°F 201254°F 199724%0%
Aug 990°F67°F106°F 200653°F 202424%0%
Aug 1089°F67°F102°F 201055°F 202424%0%
Aug 1189°F67°F103°F 201051°F 200424%0%
Aug 1289°F67°F104°F 201047°F 200424%0%
Aug 1389°F67°F105°F 201053°F 201424%0%
Aug 1489°F67°F104°F 200750°F 200224%0%
Aug 1589°F66°F105°F 200749°F 200423%0%
Aug 1688°F66°F105°F 200053°F 200423%0%
Aug 1788°F66°F105°F 200351°F 201223%0%
Aug 1888°F66°F106°F 200347°F 201223%0%
Aug 1988°F66°F110°F 202351°F 202023%0%
Aug 2088°F65°F104°F 200346°F 201223%0%
Aug 2187°F65°F109°F 200348°F 201223%0%
Aug 2287°F65°F106°F 200052°F 201623%0%
Aug 2387°F65°F107°F 202352°F 201523%0%
Aug 2487°F64°F112°F 202347°F 201523%0%
Aug 2586°F64°F108°F 202349°F 202523%0%
Aug 2686°F64°F104°F 200346°F 202523%0%
Aug 2786°F64°F109°F 200049°F 202523%0%
Aug 2886°F63°F109°F 200054°F 202323%0%
Aug 2985°F63°F99°F 201255°F 200823%0%
Aug 3085°F63°F107°F 200050°F 200923%0%
Aug 3185°F63°F108°F 200047°F 200923%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Winchester, 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 6:21 AM, sunset 8:33 PM
August 31
sunrise 6:49 AM, sunset 7:53 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00146100 (Oskaloosa 4 Ne), public domain. Records: NOAA GHCN-Daily, station USW00003997, 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.