Allen County climate

Allen County Weather in September

NOAA 1991-2020 normals for Iola 1 W, 11.6 km from Allen County

Average highs run from 85°F on September 1 to 75°F on September 30, and lows from 63°F to 53°F. Normal precipitation for the month is 4.35 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 Allen 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
58°F
Precipitation
4.35 in
Record high
105°FSep 2, 2000
Record low
30°FSep 30, 1984
Chance of a freeze
2%
Days of 90°F or more
3.9
Daylight
12 h 59 min to 11 h 50 min
Cloud cover
45%
Humidity
69%
Dew point
57°F
Wind
9.4 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°F63°F103°F 200048°F 200924%0%
Sep 285°F63°F105°F 200050°F 197424%0%
Sep 384°F63°F105°F 200044°F 197424%0%
Sep 484°F63°F102°F 197842°F 197424%0%
Sep 584°F62°F99°F 198042°F 197424%0%
Sep 683°F62°F99°F 198044°F 198824%0%
Sep 783°F62°F99°F 199846°F 201124%0%
Sep 883°F61°F96°F 198547°F 202424%0%
Sep 983°F61°F99°F 202650°F 200124%0%
Sep 1082°F61°F96°F 198343°F 196224%0%
Sep 1182°F60°F99°F 200040°F 195924%0%
Sep 1282°F60°F97°F 198045°F 195924%0%
Sep 1381°F59°F98°F 198438°F 201424%0%
Sep 1481°F59°F95°F 201142°F 197424%0%
Sep 1581°F59°F95°F 198039°F 199324%0%
Sep 1680°F58°F96°F 197840°F 200824%0%
Sep 1780°F58°F94°F 202643°F 198124%0%
Sep 1880°F58°F95°F 202639°F 197324%0%
Sep 1979°F57°F97°F 202237°F 199124%0%
Sep 2079°F57°F97°F 202240°F 199124%0%
Sep 2179°F56°F98°F 202236°F 198324%0%
Sep 2278°F56°F98°F 202231°F 199524%0%
Sep 2378°F56°F92°F 200531°F 199524%0%
Sep 2478°F55°F91°F 198433°F 198924%0%
Sep 2577°F55°F89°F 199837°F 198924%0%
Sep 2677°F54°F92°F 199037°F 197524%0%
Sep 2777°F54°F92°F 202140°F 199324%0%
Sep 2876°F54°F91°F 202135°F 196723%0%
Sep 2976°F53°F93°F 197937°F 196723%0%
Sep 3075°F53°F94°F 197930°F 198423%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Allen 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 6:51 AM, sunset 7:50 PM
September 30
sunrise 7:16 AM, sunset 7:06 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00143984 (Iola 1 W), public domain. Records: NOAA GHCN-Daily, station USC00143984, 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.