Winnebago climate

Winnebago Weather in September

NOAA 1991-2020 normals for Walthill 1E, 9.5 km from Winnebago

Average highs run from 82°F on September 1 to 73°F on September 30, and lows from 57°F to 45°F. Normal precipitation for the month is 2.96 in over about 6 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 Winnebago, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
78°F
Average low
52°F
Precipitation
2.96 in
Record high
103°FSep 2, 2000
Record low
24°FSep 29, 1945
Chance of a freeze
31%
Days of 90°F or more
3.7
Daylight
13 h 09 min to 11 h 47 min
Cloud cover
47%
Humidity
65%
Dew point
52°F
Wind
10.7 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 182°F57°F98°F 197038°F 194921%0%
Sep 282°F57°F103°F 200042°F 197421%0%
Sep 382°F57°F99°F 194737°F 197420%0%
Sep 482°F56°F98°F 201241°F 202520%0%
Sep 581°F56°F96°F 195440°F 196220%0%
Sep 681°F56°F102°F 197638°F 202520%0%
Sep 781°F55°F101°F 197136°F 202520%0%
Sep 881°F55°F101°F 194735°F 199520%0%
Sep 980°F54°F97°F 200537°F 199520%0%
Sep 1080°F54°F96°F 200536°F 199520%0%
Sep 1180°F54°F98°F 201236°F 194020%0%
Sep 1280°F53°F93°F 194836°F 194020%0%
Sep 1379°F53°F96°F 195534°F 194920%0%
Sep 1479°F52°F91°F 195535°F 200720%0%
Sep 1579°F52°F98°F 195532°F 200720%0%
Sep 1679°F52°F97°F 195537°F 198020%0%
Sep 1778°F51°F96°F 195533°F 198020%0%
Sep 1878°F51°F95°F 194733°F 199120%0%
Sep 1978°F50°F98°F 194829°F 199120%0%
Sep 2077°F50°F97°F 202232°F 200620%0%
Sep 2177°F49°F96°F 200529°F 199920%0%
Sep 2276°F49°F94°F 201725°F 199520%0%
Sep 2376°F49°F91°F 201625°F 201220%0%
Sep 2476°F48°F89°F 195630°F 194220%0%
Sep 2575°F48°F93°F 199831°F 197520%0%
Sep 2675°F47°F93°F 195625°F 198419%0%
Sep 2774°F47°F93°F 195628°F 194219%0%
Sep 2874°F46°F90°F 195325°F 194219%0%
Sep 2973°F46°F95°F 202324°F 194519%0%
Sep 3073°F45°F94°F 202328°F 200319%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Winnebago, 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 6:51 AM, sunset 8:00 PM
September 30
sunrise 7:22 AM, sunset 7:09 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00258935 (Walthill 1E), public domain. Records: NOAA GHCN-Daily, station USW00014943, 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.