Winchester climate

Winchester Weather in September

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

Average highs run from 85°F on September 1 to 75°F on September 30, and lows from 62°F to 51°F. Normal precipitation for the month is 3.36 in over about 7 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 Winchester, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
80°F
Average low
57°F
Precipitation
3.36 in
Record high
110°FSep 2, 2000
Record low
25°FSep 14, 2007
Chance of a freeze
5%
Days of 90°F or more
3.0
Daylight
13 h 02 min to 11 h 49 min
Cloud cover
45%
Humidity
68%
Dew point
55°F
Wind
9.8 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 185°F62°F106°F 201147°F 200923%0%
Sep 284°F62°F110°F 200051°F 200723%0%
Sep 384°F62°F102°F 200049°F 201023%0%
Sep 484°F61°F100°F 202346°F 201023%0%
Sep 583°F61°F101°F 202345°F 202524%0%
Sep 683°F61°F99°F 199841°F 201124%0%
Sep 783°F60°F99°F 201342°F 201124%0%
Sep 882°F60°F103°F 201343°F 202424%0%
Sep 982°F59°F98°F 201346°F 199924%0%
Sep 1082°F59°F101°F 200043°F 201224%0%
Sep 1182°F59°F105°F 200043°F 202424%0%
Sep 1281°F58°F96°F 202538°F 201424%0%
Sep 1381°F58°F96°F 200034°F 201424%0%
Sep 1481°F57°F96°F 202625°F 200724%0%
Sep 1580°F57°F94°F 202640°F 200724%0%
Sep 1680°F57°F95°F 200639°F 199924%0%
Sep 1780°F56°F97°F 202647°F 200024%0%
Sep 1879°F56°F99°F 202242°F 201224%0%
Sep 1979°F55°F101°F 202236°F 200324%0%
Sep 2079°F55°F102°F 202239°F 200324%0%
Sep 2178°F55°F92°F 200535°F 199923%0%
Sep 2278°F54°F93°F 200035°F 199923%0%
Sep 2378°F54°F91°F 201731°F 201223%0%
Sep 2477°F53°F92°F 202243°F 200023%0%
Sep 2577°F53°F91°F 199838°F 200023%0%
Sep 2677°F53°F95°F 202135°F 200023%0%
Sep 2776°F52°F93°F 201934°F 201822%0%
Sep 2876°F52°F94°F 200235°F 199622%0%
Sep 2976°F51°F96°F 200233°F 200322%0%
Sep 3075°F51°F93°F 200239°F 200922%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).

September 1
sunrise 6:50 AM, sunset 7:52 PM
September 30
sunrise 7:16 AM, sunset 7:05 PM

Every day of September: 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.