Mokena climate

Mokena Weather in September

NOAA 1991-2020 normals for Park Forest, 17.7 km from Mokena

Average highs run from 80°F on September 1 to 70°F on September 30, and lows from 60°F to 49°F. Normal precipitation for the month is 3.44 in over about 8 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 Mokena, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
76°F
Average low
55°F
Precipitation
3.44 in
Record high
94°FSep 2, 2026
Record low
36°FSep 24, 2012
Chance of a freeze
4%
Days of 90°F or more
1.9
Daylight
13 h 06 min to 11 h 48 min
Cloud cover
50%
Humidity
72%
Dew point
55°F
Wind
8.7 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 180°F60°F93°F 200047°F 200928%0%
Sep 280°F59°F94°F 202647°F 201728%0%
Sep 380°F59°F93°F 202650°F 199728%0%
Sep 480°F59°F92°F 199943°F 199728%0%
Sep 579°F59°F91°F 199947°F 199728%0%
Sep 679°F58°F93°F 199843°F 202528%0%
Sep 779°F58°F91°F 200243°F 202528%0%
Sep 878°F58°F94°F 200243°F 202428%0%
Sep 978°F57°F92°F 200246°F 200828%0%
Sep 1078°F57°F93°F 201344°F 199928%0%
Sep 1178°F57°F93°F 200047°F 199928%0%
Sep 1277°F56°F91°F 200544°F 200728%0%
Sep 1377°F56°F94°F 200538°F 201428%0%
Sep 1477°F56°F90°F 202441°F 201428%0%
Sep 1576°F55°F89°F 202438°F 200728%0%
Sep 1676°F55°F91°F 201842°F 200028%0%
Sep 1776°F54°F91°F 201844°F 199929%0%
Sep 1875°F54°F88°F 200045°F 201229%0%
Sep 1975°F53°F91°F 201342°F 201229%0%
Sep 2075°F53°F94°F 201840°F 200629%0%
Sep 2174°F53°F93°F 201742°F 200029%0%
Sep 2274°F52°F93°F 201738°F 199929%0%
Sep 2373°F52°F93°F 201739°F 201230%0%
Sep 2473°F51°F91°F 200736°F 201230%0%
Sep 2573°F51°F91°F 201739°F 200130%0%
Sep 2672°F50°F93°F 199837°F 200030%0%
Sep 2772°F50°F87°F 199842°F 200130%0%
Sep 2871°F50°F85°F 201341°F 200630%0%
Sep 2971°F49°F88°F 202537°F 200330%0%
Sep 3070°F49°F87°F 200237°F 200430%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Mokena, 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 7:24 PM
September 30
sunrise 6:47 AM, sunset 6:35 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00116616 (Park Forest), public domain. Records: NOAA GHCN-Daily, station USC00117457, 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.