Omro climate

Omro Weather in September

NOAA 1991-2020 normals for Oshkosh, 15 km from Omro

Average highs run from 77°F on September 1 to 67°F on September 30, and lows from 58°F to 47°F. Normal precipitation for the month is 3.26 in over about 9 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 Omro, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
73°F
Average low
53°F
Precipitation
3.26 in
Record high
94°FSep 3, 2023
Record low
30°FSep 19, 2012
Chance of a freeze
5%
Days of 90°F or more
0.6
Daylight
13 h 13 min to 11 h 45 min
Cloud cover
55%
Humidity
75%
Dew point
53°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 177°F58°F91°F 202643°F 200930%0%
Sep 277°F58°F91°F 200845°F 201730%0%
Sep 377°F57°F94°F 202341°F 199730%0%
Sep 477°F57°F93°F 202337°F 199730%0%
Sep 576°F57°F89°F 200742°F 201130%0%
Sep 676°F56°F89°F 201542°F 201131%0%
Sep 776°F56°F87°F 200242°F 202531%0%
Sep 875°F56°F89°F 200243°F 202531%0%
Sep 975°F55°F89°F 200244°F 200831%0%
Sep 1075°F55°F92°F 201341°F 200831%0%
Sep 1174°F55°F90°F 200541°F 199931%0%
Sep 1274°F54°F89°F 200539°F 200732%0%
Sep 1374°F54°F91°F 199840°F 201432%0%
Sep 1473°F53°F85°F 200938°F 200732%0%
Sep 1573°F53°F88°F 202433°F 200732%0%
Sep 1673°F53°F87°F 202437°F 200732%0%
Sep 1772°F52°F88°F 201838°F 199932%0%
Sep 1872°F52°F83°F 200031°F 201232%0%
Sep 1972°F51°F87°F 202130°F 201232%0%
Sep 2071°F51°F85°F 201738°F 200633%0%
Sep 2171°F51°F88°F 200536°F 199933%0%
Sep 2270°F50°F89°F 201738°F 201133%0%
Sep 2370°F50°F90°F 201736°F 201233%0%
Sep 2469°F49°F88°F 201736°F 201133%0%
Sep 2569°F49°F88°F 201734°F 200033%0%
Sep 2669°F49°F84°F 199834°F 201233%0%
Sep 2768°F48°F83°F 202533°F 201034%0%
Sep 2868°F48°F80°F 201333°F 201234%0%
Sep 2967°F47°F80°F 202534°F 201834%0%
Sep 3067°F47°F84°F 201934°F 200334%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Omro, 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).

September 1
sunrise 6:18 AM, sunset 7:31 PM
September 30
sunrise 6:52 AM, sunset 6:37 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00476330 (Oshkosh), public domain. Records: NOAA GHCN-Daily, station USW00094855, 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.