Polk County climate

Polk County Weather in September

NOAA 1991-2020 normals for Bolivar 1 Ne, 0.8 km from Polk County

Average highs run from 86°F on September 1 to 76°F on September 30, and lows from 62°F to 51°F. Normal precipitation for the month is 4.25 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 Polk County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
81°F
Average low
57°F
Precipitation
4.25 in
Record high
104°FSep 4, 1947
Record low
30°FSep 27, 1942
Chance of a freeze
3%
Days of 90°F or more
4.7
Daylight
12 h 59 min to 11 h 50 min
Cloud cover
45%
Humidity
69%
Dew point
58°F
Wind
8.3 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 186°F62°F102°F 200043°F 196726%0%
Sep 285°F62°F101°F 200049°F 195226%0%
Sep 385°F61°F102°F 200041°F 197426%0%
Sep 485°F61°F104°F 194739°F 197426%0%
Sep 585°F61°F101°F 202647°F 197426%0%
Sep 684°F60°F101°F 202645°F 197426%0%
Sep 784°F60°F104°F 194744°F 201126%0%
Sep 884°F60°F100°F 202645°F 195626%0%
Sep 983°F59°F101°F 202642°F 194326%0%
Sep 1083°F59°F96°F 198438°F 197626%0%
Sep 1183°F59°F96°F 200037°F 194026%0%
Sep 1282°F58°F96°F 198036°F 194026%0%
Sep 1382°F58°F99°F 201141°F 196026%0%
Sep 1482°F57°F98°F 197143°F 197426%0%
Sep 1581°F57°F100°F 202638°F 196127%0%
Sep 1681°F57°F98°F 202641°F 196127%0%
Sep 1781°F56°F98°F 202640°F 198127%0%
Sep 1880°F56°F95°F 201937°F 197327%0%
Sep 1980°F55°F96°F 195437°F 199127%0%
Sep 2080°F55°F97°F 195437°F 199127%0%
Sep 2179°F54°F95°F 202237°F 198327%0%
Sep 2279°F54°F92°F 195633°F 199527%0%
Sep 2379°F54°F92°F 196035°F 198327%0%
Sep 2478°F53°F91°F 201632°F 198926%0%
Sep 2578°F53°F90°F 198136°F 198926%0%
Sep 2677°F52°F92°F 195334°F 197526%0%
Sep 2777°F52°F91°F 195330°F 194226%0%
Sep 2877°F51°F101°F 195335°F 196726%0%
Sep 2976°F51°F98°F 195333°F 196726%0%
Sep 3076°F51°F91°F 197931°F 198426%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Polk County, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 6:44 AM, sunset 7:43 PM
September 30
sunrise 7:08 AM, sunset 6:58 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00230789 (Bolivar 1 Ne), public domain. Records: NOAA GHCN-Daily, station USW00013995, 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.