Onalaska climate

Onalaska Weather in September

NOAA 1991-2020 normals for Livingston 2 Nne, 19.6 km from Onalaska

Average highs run from 93°F on September 1 to 86°F on September 30, and lows from 72°F to 64°F. Normal precipitation for the month is 4.42 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 Onalaska, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
90°F
Average low
68°F
Precipitation
4.42 in
Record high
111°FSep 8, 2023
Record low
46°FSep 26, 2000
Chance of a freeze
0%
Days of 90°F or more
16.7
Daylight
12 h 46 min to 11 h 53 min
Cloud cover
46%
Humidity
71%
Dew point
66°F
Wind
4.0 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 193°F72°F107°F 200061°F 200423%0%
Sep 293°F72°F105°F 200067°F 200923%0%
Sep 393°F72°F107°F 200069°F 200623%0%
Sep 492°F71°F110°F 200067°F 200822%0%
Sep 592°F71°F106°F 202363°F 200522%0%
Sep 692°F71°F104°F 202353°F 201122%0%
Sep 792°F71°F108°F 202356°F 201122%0%
Sep 892°F71°F111°F 202357°F 201121%0%
Sep 991°F70°F97°F 199756°F 202421%0%
Sep 1091°F70°F97°F 202358°F 201221%0%
Sep 1191°F70°F101°F 201159°F 201221%0%
Sep 1291°F70°F102°F 201158°F 201721%0%
Sep 1390°F69°F104°F 201157°F 201521%0%
Sep 1490°F69°F101°F 201158°F 201520%0%
Sep 1590°F69°F98°F 202658°F 199920%0%
Sep 1690°F68°F97°F 200455°F 199920%0%
Sep 1789°F68°F99°F 200452°F 200020%0%
Sep 1889°F68°F98°F 200453°F 200020%0%
Sep 1989°F67°F97°F 200559°F 200019%0%
Sep 2089°F67°F99°F 200556°F 200619%0%
Sep 2188°F67°F101°F 200557°F 200219%0%
Sep 2288°F66°F100°F 200550°F 199919%0%
Sep 2388°F66°F98°F 202249°F 199919%0%
Sep 2488°F66°F97°F 202354°F 201418%0%
Sep 2587°F65°F100°F 201153°F 200018%0%
Sep 2687°F65°F100°F 200546°F 200018%0%
Sep 2787°F65°F97°F 200548°F 200018%0%
Sep 2887°F64°F98°F 201148°F 200018%0%
Sep 2986°F64°F98°F 201150°F 200018%0%
Sep 3086°F64°F95°F 201947°F 199918%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Onalaska, 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 6:57 AM, sunset 7:43 PM
September 30
sunrise 7:14 AM, sunset 7:07 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00415271 (Livingston 2 Nne), public domain. Records: NOAA GHCN-Daily, station USW00053903, 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.