Carroll County climate

Carroll County Weather in September

NOAA 1991-2020 normals for Harrison Boone CO AP, 35.2 km from Carroll County

Average highs run from 86°F on September 1 to 77°F on September 30, and lows from 63°F to 53°F. Normal precipitation for the month is 4.06 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 Carroll 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
59°F
Precipitation
4.06 in
Record high
103°FSep 1, 2000
Record low
33°FSep 24, 1989
Chance of a freeze
0%
Days of 90°F or more
4.4
Daylight
12 h 56 min to 11 h 50 min
Cloud cover
46%
Humidity
68%
Dew point
58°F
Wind
5.6 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°F63°F103°F 200044°F 196726%0%
Sep 286°F63°F102°F 200045°F 194926%0%
Sep 385°F63°F103°F 200046°F 197426%0%
Sep 485°F62°F102°F 199845°F 197426%0%
Sep 585°F62°F102°F 202648°F 197426%0%
Sep 685°F62°F103°F 202647°F 201126%0%
Sep 784°F62°F100°F 199845°F 198826%0%
Sep 884°F61°F100°F 202645°F 202426%0%
Sep 984°F61°F101°F 202644°F 202426%0%
Sep 1083°F61°F94°F 201344°F 194826%0%
Sep 1183°F60°F94°F 197245°F 197626%0%
Sep 1283°F60°F95°F 198047°F 196426%0%
Sep 1382°F60°F96°F 201145°F 196426%0%
Sep 1482°F59°F97°F 197148°F 196126%0%
Sep 1582°F59°F99°F 202644°F 196126%0%
Sep 1681°F58°F96°F 198040°F 197926%0%
Sep 1781°F58°F100°F 202643°F 198126%0%
Sep 1881°F58°F94°F 197242°F 198126%0%
Sep 1980°F57°F93°F 197239°F 199126%0%
Sep 2080°F57°F96°F 202437°F 199126%0%
Sep 2180°F57°F95°F 202237°F 198326%0%
Sep 2279°F56°F93°F 194837°F 198326%0%
Sep 2379°F56°F92°F 201736°F 199526%0%
Sep 2479°F56°F91°F 201733°F 198926%0%
Sep 2578°F55°F90°F 199837°F 200126%0%
Sep 2678°F55°F90°F 201738°F 200026%0%
Sep 2778°F54°F90°F 199836°F 198526%0%
Sep 2877°F54°F90°F 199838°F 196726%0%
Sep 2977°F54°F92°F 199834°F 196726%0%
Sep 3077°F53°F92°F 199433°F 194926%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Carroll 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 6:46 AM, sunset 7:42 PM
September 30
sunrise 7:09 AM, sunset 6:59 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00013971 (Harrison Boone CO AP), public domain. Records: NOAA GHCN-Daily, station USW00013971, 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.