Hamilton climate

Hamilton Weather in September

NOAA 1991-2020 normals for Hamilton, 0.6 km from Hamilton

Average highs run from 77°F on September 1 to 66°F on September 30, and lows from 44°F to 36°F. Normal precipitation for the month is 0.81 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 Hamilton, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
72°F
Average low
40°F
Precipitation
0.81 in
Record high
98°FSep 1, 1967
Record low
10°FSep 7, 1895
Chance of a freeze
78%
Days of 90°F or more
1.0
Daylight
13 h 18 min to 11 h 44 min
Cloud cover
51%
Humidity
60%
Dew point
33°F
Wind
4.5 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 177°F44°F98°F 196728°F 189523%0%
Sep 277°F44°F98°F 199829°F 189523%0%
Sep 377°F44°F94°F 193128°F 189523%0%
Sep 476°F43°F94°F 199824°F 189522%0%
Sep 576°F43°F95°F 195519°F 189522%0%
Sep 676°F43°F94°F 202017°F 189522%0%
Sep 775°F43°F98°F 193110°F 189522%0%
Sep 875°F42°F94°F 202221°F 189522%0%
Sep 975°F42°F92°F 202128°F 189522%0%
Sep 1074°F42°F95°F 193528°F 189522%0%
Sep 1174°F42°F95°F 193527°F 189522%0%
Sep 1274°F42°F92°F 195320°F 189522%0%
Sep 1373°F41°F93°F 201520°F 189522%0%
Sep 1473°F41°F90°F 194819°F 189522%0%
Sep 1572°F41°F92°F 200222°F 189522%0%
Sep 1672°F40°F87°F 198921°F 189522%0%
Sep 1772°F40°F92°F 200919°F 189522%0%
Sep 1871°F40°F90°F 198424°F 196522%0%
Sep 1971°F40°F90°F 190127°F 196522%0%
Sep 2070°F39°F87°F 189919°F 189522%0%
Sep 2170°F39°F94°F 193616°F 189522%0%
Sep 2270°F39°F89°F 193816°F 189522%0%
Sep 2369°F38°F87°F 190317°F 189522%0%
Sep 2469°F38°F91°F 201118°F 193422%0%
Sep 2568°F38°F94°F 201425°F 193322%0%
Sep 2668°F38°F90°F 201521°F 197222%0%
Sep 2767°F37°F90°F 189925°F 196122%0%
Sep 2867°F37°F87°F 196725°F 199922%0%
Sep 2966°F37°F89°F 201021°F 198522%0%
Sep 3066°F36°F86°F 196318°F 198522%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Hamilton, 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 (MDT).

September 1
sunrise 6:57 AM, sunset 8:15 PM
September 30
sunrise 7:34 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 USC00243885 (Hamilton), public domain. Records: NOAA GHCN-Daily, station USC00243885, 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.