Delaware County climate

Delaware County Weather in September

NOAA 1991-2020 normals for Upper Spavinaw Port, 6.9 km from Delaware County

Average highs run from 88°F on September 1 to 79°F on September 30, and lows from 62°F to 50°F. Normal precipitation for the month is 4.47 in.

September day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Delaware County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
83°F
Average low
56°F
Precipitation
4.47 in
Record high
103°FSep 9, 2026
Record low
39°FSep 29, 2020
Chance of a freeze
3%
Days of 90°F or more
7.5
Daylight
12 h 56 min to 11 h 50 min
Cloud cover
45%
Humidity
68%
Dew point
59°F
Wind
7.4 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°F62°F102°F 202650°F 20090%
Sep 287°F62°F101°F 202645°F 20170%
Sep 387°F62°F101°F 202653°F 20160%
Sep 487°F61°F101°F 202654°F 20160%
Sep 587°F61°F101°F 202649°F 20100%
Sep 686°F61°F102°F 202645°F 20170%
Sep 786°F60°F96°F 201244°F 20170%
Sep 886°F60°F101°F 202645°F 20110%
Sep 985°F59°F103°F 202650°F 20110%
Sep 1085°F59°F101°F 202650°F 20110%
Sep 1185°F59°F92°F 201351°F 20160%
Sep 1284°F58°F93°F 202146°F 20220%
Sep 1384°F58°F95°F 202646°F 20220%
Sep 1484°F57°F97°F 201148°F 20140%
Sep 1583°F57°F92°F 202148°F 20140%
Sep 1683°F56°F92°F 201945°F 20080%
Sep 1783°F56°F93°F 202543°F 20080%
Sep 1882°F56°F94°F 202547°F 20080%
Sep 1982°F55°F95°F 201850°F 20080%
Sep 2082°F55°F96°F 201849°F 20200%
Sep 2181°F54°F97°F 202250°F 20110%
Sep 2281°F54°F98°F 202247°F 20130%
Sep 2381°F53°F90°F 201743°F 20210%
Sep 2481°F53°F92°F 201744°F 20210%
Sep 2580°F52°F90°F 201651°F 20140%
Sep 2680°F52°F88°F 201244°F 20220%
Sep 2780°F51°F88°F 202141°F 20110%
Sep 2879°F51°F87°F 201941°F 20110%
Sep 2979°F50°F88°F 202339°F 20200%
Sep 3079°F50°F89°F 202340°F 20090%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Delaware County, in percent, and of at least 0.1 inch of snowfall.00.21102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 6:51 AM, sunset 7:47 PM
September 30
sunrise 7:14 AM, sunset 7:04 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00349101 (Upper Spavinaw Port), public domain. Records: NOAA GHCN-Daily, station USC00230163, 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.