Armstrong County climate

Armstrong County Weather in September

NOAA 1991-2020 normals for Vigo Park, 37.1 km from Armstrong County

Average highs run from 88°F on September 1 to 80°F on September 30, and lows from 60°F to 49°F. Normal precipitation for the month is 2.06 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 Armstrong County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
84°F
Average low
55°F
Precipitation
2.06 in
Record high
105°FSep 7, 2023
Record low
30°FSep 30, 1984
Chance of a freeze
2%
Days of 90°F or more
8.4
Daylight
12 h 54 min to 11 h 51 min
Cloud cover
40%
Humidity
54%
Dew point
52°F
Wind
10.3 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 188°F60°F101°F 194750°F 199322%0%
Sep 288°F60°F102°F 194747°F 197422%0%
Sep 387°F60°F102°F 194746°F 197422%0%
Sep 487°F59°F102°F 198347°F 195322%0%
Sep 587°F59°F103°F 199548°F 201122%0%
Sep 687°F59°F102°F 200048°F 195622%0%
Sep 786°F58°F105°F 202347°F 195622%0%
Sep 886°F58°F98°F 198540°F 202022%0%
Sep 986°F58°F97°F 200037°F 202021%0%
Sep 1086°F57°F102°F 202140°F 202021%0%
Sep 1185°F57°F99°F 200046°F 202021%0%
Sep 1285°F57°F100°F 202643°F 195921%0%
Sep 1385°F56°F101°F 202440°F 195921%0%
Sep 1484°F56°F100°F 202440°F 198921%0%
Sep 1584°F56°F98°F 201039°F 199321%0%
Sep 1684°F55°F98°F 195639°F 195121%0%
Sep 1784°F55°F97°F 200440°F 196521%0%
Sep 1883°F55°F99°F 199740°F 197121%0%
Sep 1983°F54°F100°F 202441°F 197120%0%
Sep 2083°F54°F97°F 195637°F 198320%0%
Sep 2182°F53°F97°F 198031°F 198320%0%
Sep 2282°F53°F97°F 202338°F 199520%0%
Sep 2382°F53°F96°F 195339°F 198920%0%
Sep 2482°F52°F98°F 199835°F 198920%0%
Sep 2581°F52°F98°F 202033°F 200020%0%
Sep 2681°F51°F97°F 202036°F 197020%0%
Sep 2781°F51°F98°F 195335°F 199620%0%
Sep 2880°F50°F96°F 197736°F 199619%0%
Sep 2980°F50°F96°F 202332°F 198419%0%
Sep 3080°F49°F95°F 197730°F 198419%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Armstrong County, 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 7:18 AM, sunset 8:12 PM
September 30
sunrise 7:40 AM, sunset 7:31 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00419380 (Vigo Park), public domain. Records: NOAA GHCN-Daily, station USW00023047, 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.