Knox County climate

Knox County Weather in September

NOAA 1991-2020 normals for Steffenville, 28.3 km from Knox County

Average highs run from 82°F on September 1 to 73°F on September 30, and lows from 60°F to 50°F. Normal precipitation for the month is 3.73 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 Knox County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
78°F
Average low
55°F
Precipitation
3.73 in
Record high
100°FSep 9, 2013
Record low
29°FSep 28, 1951
Chance of a freeze
11%
Days of 90°F or more
4.0
Daylight
13 h 04 min to 11 h 48 min
Cloud cover
46%
Humidity
69%
Dew point
55°F
Wind
8.5 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 182°F60°F99°F 195339°F 194924%0%
Sep 282°F60°F98°F 202646°F 194924%0%
Sep 381°F59°F97°F 196041°F 195223%0%
Sep 481°F59°F96°F 202645°F 202523%0%
Sep 581°F59°F98°F 202643°F 202523%0%
Sep 681°F58°F96°F 196042°F 201123%0%
Sep 780°F58°F98°F 201339°F 195623%0%
Sep 880°F58°F97°F 201340°F 202423%0%
Sep 980°F57°F100°F 201339°F 200823%0%
Sep 1080°F57°F97°F 201342°F 196923%0%
Sep 1179°F57°F97°F 201341°F 195923%0%
Sep 1279°F56°F91°F 196239°F 200723%0%
Sep 1379°F56°F96°F 202535°F 195323%0%
Sep 1478°F56°F93°F 202539°F 201423%0%
Sep 1578°F55°F92°F 195534°F 200723%0%
Sep 1678°F55°F94°F 201940°F 195123%0%
Sep 1778°F55°F96°F 195342°F 199923%0%
Sep 1877°F54°F94°F 195340°F 201223%0%
Sep 1977°F54°F94°F 194840°F 195223%0%
Sep 2076°F53°F96°F 202236°F 196223%0%
Sep 2176°F53°F93°F 201737°F 199923%0%
Sep 2276°F53°F93°F 201735°F 201223%0%
Sep 2375°F52°F93°F 201732°F 201224%0%
Sep 2475°F52°F91°F 201733°F 196524%0%
Sep 2575°F52°F90°F 201737°F 195024%0%
Sep 2674°F51°F91°F 195337°F 200124%0%
Sep 2774°F51°F89°F 195637°F 195124%0%
Sep 2874°F51°F99°F 195329°F 195124%0%
Sep 2973°F50°F94°F 195331°F 196724%0%
Sep 3073°F50°F91°F 202332°F 197224%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Knox 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 6:36 AM, sunset 7:40 PM
September 30
sunrise 7:04 AM, sunset 6:52 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00238051 (Steffenville), public domain. Records: NOAA GHCN-Daily, station USW00014938, 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.