Troy climate

Troy Weather in September

NOAA 1991-2020 normals for Moscow U Of I, 14.2 km from Troy

Average highs run from 82°F on September 1 to 70°F on September 30, and lows from 43°F to 36°F. Normal precipitation for the month is 1.01 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 Troy, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
76°F
Average low
40°F
Precipitation
1.01 in
Record high
98°FSep 1, 2025
Record low
21°FSep 23, 2000
Chance of a freeze
95%
Days of 90°F or more
2.3
Daylight
13 h 19 min to 11 h 43 min
Cloud cover
44%
Humidity
51%
Dew point
41°F
Wind
6.0 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°F43°F98°F 202535°F 199914%0%
Sep 281°F43°F97°F 202530°F 199915%0%
Sep 381°F43°F96°F 199833°F 201115%0%
Sep 481°F42°F96°F 202035°F 201615%0%
Sep 580°F42°F92°F 199838°F 201215%0%
Sep 680°F42°F93°F 199836°F 200215%0%
Sep 780°F42°F95°F 202433°F 199916%0%
Sep 879°F42°F94°F 201134°F 200716%0%
Sep 979°F41°F91°F 201134°F 200716%0%
Sep 1079°F41°F93°F 201137°F 200517%0%
Sep 1178°F41°F95°F 201332°F 201217%0%
Sep 1278°F41°F92°F 201328°F 201217%0%
Sep 1378°F40°F90°F 201332°F 201618%0%
Sep 1477°F40°F93°F 200032°F 200618%0%
Sep 1577°F40°F93°F 199828°F 200618%0%
Sep 1676°F40°F91°F 200934°F 201719%0%
Sep 1776°F39°F92°F 200832°F 200619%0%
Sep 1876°F39°F86°F 200838°F 200220%0%
Sep 1975°F39°F92°F 200832°F 201820%0%
Sep 2075°F39°F86°F 201430°F 200721%0%
Sep 2174°F39°F88°F 201427°F 200221%0%
Sep 2274°F38°F85°F 199929°F 200021%0%
Sep 2373°F38°F93°F 200121°F 200022%0%
Sep 2473°F38°F95°F 201127°F 200522%0%
Sep 2572°F38°F87°F 202433°F 200223%0%
Sep 2672°F37°F86°F 201633°F 201523%0%
Sep 2771°F37°F89°F 202227°F 201524%0%
Sep 2871°F37°F86°F 202429°F 201524%0%
Sep 2970°F37°F83°F 202031°F 201924%0%
Sep 3070°F36°F85°F 200828°F 202425%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Troy, 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 (PDT).

September 1
sunrise 6:07 AM, sunset 7:26 PM
September 30
sunrise 6:45 AM, sunset 6:28 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00106152 (Moscow U Of I), public domain. Records: NOAA GHCN-Daily, station USW00094129, 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.