Greeley climate

Greeley Weather in September

NOAA 1991-2020 normals for Greeley, 0.4 km from Greeley

Average highs run from 82°F on September 1 to 72°F on September 30, and lows from 54°F to 42°F. Normal precipitation for the month is 2.28 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 Greeley, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
77°F
Average low
48°F
Precipitation
2.28 in
Record high
100°FSep 2, 2023
Record low
29°FSep 25, 2000
Chance of a freeze
42%
Days of 90°F or more
2.9
Daylight
13 h 07 min to 11 h 47 min
Cloud cover
46%
Humidity
60%
Dew point
49°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 182°F54°F97°F 201146°F 200524%0%
Sep 281°F54°F100°F 202347°F 200624%0%
Sep 381°F53°F100°F 202341°F 200823%0%
Sep 481°F53°F100°F 201241°F 201023%0%
Sep 581°F52°F96°F 202038°F 201123%0%
Sep 680°F52°F98°F 201337°F 202523%0%
Sep 780°F52°F96°F 202641°F 201023%0%
Sep 880°F51°F96°F 202236°F 201223%0%
Sep 980°F51°F97°F 201336°F 201223%0%
Sep 1079°F50°F92°F 201243°F 200123%0%
Sep 1179°F50°F96°F 201238°F 202223%0%
Sep 1279°F50°F94°F 202537°F 201423%0%
Sep 1378°F49°F97°F 200032°F 201423%0%
Sep 1478°F49°F91°F 201735°F 201423%0%
Sep 1578°F48°F95°F 201536°F 200823%0%
Sep 1678°F48°F91°F 202138°F 201423%0%
Sep 1777°F48°F94°F 200039°F 202023%0%
Sep 1877°F47°F91°F 200034°F 200323%0%
Sep 1976°F47°F94°F 202331°F 200323%0%
Sep 2076°F46°F98°F 202235°F 201223%
Sep 2176°F46°F95°F 200535°F 200023%
Sep 2275°F46°F97°F 201733°F 201123%
Sep 2375°F45°F90°F 200330°F 201223%
Sep 2474°F45°F90°F 200532°F 200123%
Sep 2574°F44°F86°F 202429°F 200023%
Sep 2674°F44°F94°F 202133°F 200023%
Sep 2773°F43°F91°F 202131°F 200223%
Sep 2873°F43°F94°F 202431°F 200323%
Sep 2972°F43°F90°F 202430°F 200923%
Sep 3072°F42°F93°F 200030°F 200323%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Greeley, 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 7:00 AM, sunset 8:07 PM
September 30
sunrise 7:30 AM, sunset 7:17 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00253425 (Greeley), public domain. Records: NOAA GHCN-Daily, station USW00094958, 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.