Marion County climate

Marion County Weather in September

NOAA 1991-2020 normals for Salem, 2.6 km from Marion County

Average highs run from 85°F on September 1 to 76°F on September 30, and lows from 62°F to 51°F. Normal precipitation for the month is 3.54 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 Marion County, 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
3.54 in
Record high
101°FSep 2, 2026
Record low
33°FSep 23, 1974
Chance of a freeze
1%
Days of 90°F or more
3.3
Daylight
13 h 01 min to 11 h 49 min
Cloud cover
46%
Humidity
69%
Dew point
57°F
Wind
7.8 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°F98°F 194346°F 196724%0%
Sep 284°F62°F101°F 202645°F 201724%0%
Sep 384°F62°F101°F 202645°F 201723%0%
Sep 484°F61°F101°F 202645°F 197423%0%
Sep 584°F61°F101°F 202647°F 197223%0%
Sep 683°F61°F100°F 196044°F 198823%0%
Sep 783°F60°F98°F 196043°F 201723%0%
Sep 883°F60°F99°F 196042°F 198623%0%
Sep 983°F60°F98°F 198346°F 202423%0%
Sep 1082°F59°F98°F 198343°F 197623%0%
Sep 1182°F59°F94°F 201344°F 197023%0%
Sep 1282°F58°F95°F 199139°F 196823%0%
Sep 1381°F58°F95°F 199139°F 197523%0%
Sep 1481°F58°F96°F 202539°F 196423%0%
Sep 1581°F57°F99°F 202541°F 196123%0%
Sep 1681°F57°F99°F 202642°F 196123%0%
Sep 1780°F57°F99°F 202644°F 196123%0%
Sep 1880°F56°F99°F 202642°F 196123%0%
Sep 1980°F56°F97°F 202539°F 199123%0%
Sep 2079°F55°F92°F 197838°F 199124%0%
Sep 2179°F55°F97°F 202236°F 199124%0%
Sep 2278°F55°F95°F 202237°F 197624%0%
Sep 2378°F54°F92°F 196033°F 197424%0%
Sep 2478°F54°F93°F 200734°F 198924%0%
Sep 2577°F53°F91°F 198636°F 196524%0%
Sep 2677°F53°F90°F 198637°F 194424%0%
Sep 2777°F52°F89°F 202337°F 198924%0%
Sep 2876°F52°F91°F 198634°F 200124%0%
Sep 2976°F52°F91°F 199938°F 196224%0%
Sep 3076°F51°F92°F 197136°F 196324%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Marion County, 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 6:25 AM, sunset 7:26 PM
September 30
sunrise 6:51 AM, sunset 6:40 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00117636 (Salem), public domain. Records: NOAA GHCN-Daily, station USC00117636, 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.