Colby climate

Colby Weather in September

NOAA 1991-2020 normals for Colby 1SW, 1.5 km from Colby

Average highs run from 86°F on September 1 to 76°F on September 30, and lows from 56°F to 44°F. Normal precipitation for the month is 1.44 in over about 6 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 Colby, 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
50°F
Precipitation
1.44 in
Snowfall
0.2 in
Record high
104°FSep 1, 1985
Record low
21°FSep 30, 1985
Chance of a freeze
20%
Days of 90°F or more
7.5
Daylight
13 h 02 min to 11 h 48 min
Cloud cover
42%
Humidity
53%
Dew point
47°F
Wind
11.2 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°F56°F104°F 198545°F 199321%0%
Sep 286°F56°F103°F 201139°F 196221%0%
Sep 385°F55°F103°F 196432°F 197421%0%
Sep 485°F55°F102°F 202336°F 197420%0%
Sep 585°F55°F103°F 202640°F 196220%0%
Sep 685°F54°F104°F 201037°F 201720%0%
Sep 784°F54°F103°F 200042°F 201020%0%
Sep 884°F54°F103°F 197141°F 202020%0%
Sep 984°F53°F101°F 201334°F 202020%0%
Sep 1083°F53°F102°F 196433°F 197020%0%
Sep 1183°F53°F102°F 202137°F 197020%0%
Sep 1283°F52°F103°F 202134°F 201420%0%
Sep 1383°F52°F98°F 200431°F 197420%0%
Sep 1482°F51°F99°F 200033°F 198920%0%
Sep 1582°F51°F97°F 201733°F 196120%0%
Sep 1682°F50°F98°F 201537°F 199320%0%
Sep 1781°F50°F96°F 201535°F 196520%0%
Sep 1881°F49°F97°F 201836°F 196520%0%
Sep 1980°F49°F99°F 199731°F 197120%0%
Sep 2080°F49°F101°F 198033°F 198320%0%
Sep 2180°F48°F99°F 202223°F 198320%0%
Sep 2279°F48°F99°F 200524°F 198320%0%
Sep 2379°F47°F95°F 201729°F 198920%0%
Sep 2478°F47°F95°F 195829°F 198919%0%
Sep 2578°F46°F96°F 196629°F 200019%0%
Sep 2678°F46°F100°F 199827°F 198519%0%
Sep 2777°F45°F98°F 202130°F 196719%0%
Sep 2877°F45°F95°F 202129°F 197619%0%
Sep 2976°F44°F95°F 202327°F 198519%0%
Sep 3076°F44°F93°F 199421°F 198519%1%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Colby, 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 7:13 AM, sunset 8:15 PM
September 30
sunrise 7:40 AM, sunset 7:28 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00141699 (Colby 1SW), public domain. Records: NOAA GHCN-Daily, station USC00141699, 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.