Mount Morris climate

Mount Morris Weather in September

NOAA 1991-2020 normals for Flint 7W, 10.9 km from Mount Morris

Average highs run from 77°F on September 1 to 67°F on September 30, and lows from 56°F to 45°F. Normal precipitation for the month is 2.88 in over about 9 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 Mount Morris, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
73°F
Average low
51°F
Precipitation
2.88 in
Record high
97°FSep 1, 1953
Record low
26°FSep 28, 1991
Chance of a freeze
11%
Days of 90°F or more
0.8
Daylight
13 h 10 min to 11 h 47 min
Cloud cover
57%
Humidity
73%
Dew point
53°F
Wind
9.2 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 177°F56°F97°F 195339°F 201731%0%
Sep 277°F56°F97°F 195339°F 199431%0%
Sep 376°F55°F97°F 195342°F 199731%0%
Sep 476°F55°F90°F 197337°F 199731%0%
Sep 576°F55°F94°F 195438°F 199731%0%
Sep 676°F54°F91°F 195434°F 196231%0%
Sep 776°F54°F93°F 196036°F 202531%0%
Sep 875°F54°F95°F 196037°F 198631%0%
Sep 975°F53°F93°F 200236°F 201731%0%
Sep 1075°F53°F96°F 201336°F 196931%0%
Sep 1175°F53°F92°F 195236°F 195831%0%
Sep 1274°F52°F93°F 195234°F 196432%0%
Sep 1374°F52°F93°F 195233°F 196432%0%
Sep 1474°F51°F88°F 200233°F 196332%0%
Sep 1573°F51°F91°F 199138°F 195332%0%
Sep 1673°F51°F90°F 195533°F 195932%0%
Sep 1773°F50°F94°F 195530°F 195932%0%
Sep 1872°F50°F93°F 195534°F 199532%0%
Sep 1972°F49°F90°F 195530°F 202032%0%
Sep 2072°F49°F89°F 199833°F 195632%0%
Sep 2171°F49°F93°F 201732°F 195632%0%
Sep 2271°F48°F93°F 201730°F 199932%0%
Sep 2370°F48°F94°F 201727°F 199532%0%
Sep 2470°F47°F91°F 201731°F 198933%0%
Sep 2570°F47°F92°F 201731°F 199133%0%
Sep 2669°F47°F93°F 201731°F 196633%0%
Sep 2769°F46°F86°F 199827°F 195733%0%
Sep 2868°F46°F83°F 199926°F 199133%0%
Sep 2968°F46°F83°F 195328°F 195134%0%
Sep 3067°F45°F86°F 200230°F 199334%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Mount Morris, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

September 1
sunrise 6:59 AM, sunset 8:09 PM
September 30
sunrise 7:31 AM, sunset 7:18 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00202851 (Flint 7W), public domain. Records: NOAA GHCN-Daily, station USW00014826, 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.