Sullivan climate

Sullivan Weather in September

NOAA 1991-2020 normals for Sullivan 3S, 4.4 km from Sullivan

Average highs run from 84°F on September 1 to 75°F on September 30, and lows from 59°F to 50°F. Normal precipitation for the month is 2.71 in over about 7 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 Sullivan, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
80°F
Average low
55°F
Precipitation
2.71 in
Record high
99°FSep 1, 2011
Record low
34°FSep 25, 2001
Chance of a freeze
4%
Days of 90°F or more
3.6
Daylight
13 h 02 min to 11 h 48 min
Cloud cover
46%
Humidity
69%
Dew point
56°F
Wind
8.3 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 184°F59°F99°F 201141°F 200722%0%
Sep 284°F59°F98°F 201142°F 201722%0%
Sep 384°F59°F96°F 201149°F 202422%0%
Sep 483°F58°F97°F 202650°F 202422%0%
Sep 583°F58°F97°F 202648°F 200322%0%
Sep 683°F58°F94°F 199845°F 201122%0%
Sep 783°F58°F93°F 201545°F 202522%0%
Sep 883°F57°F94°F 200242°F 202422%0%
Sep 982°F57°F95°F 201344°F 202422%0%
Sep 1082°F57°F96°F 201346°F 201722%0%
Sep 1182°F56°F95°F 201344°F 201722%0%
Sep 1282°F56°F92°F 199845°F 200722%0%
Sep 1381°F56°F93°F 202540°F 201422%0%
Sep 1481°F55°F96°F 202540°F 201422%0%
Sep 1581°F55°F97°F 202636°F 200722%0%
Sep 1680°F55°F94°F 202642°F 199922%0%
Sep 1780°F54°F96°F 202644°F 199922%0%
Sep 1880°F54°F92°F 201843°F 202022%0%
Sep 1979°F54°F92°F 200539°F 202022%0%
Sep 2079°F53°F93°F 201739°F 200622%0%
Sep 2179°F53°F95°F 201740°F 199922%0%
Sep 2278°F52°F94°F 201739°F 199923%0%
Sep 2378°F52°F93°F 201740°F 201223%0%
Sep 2478°F52°F92°F 201736°F 201223%0%
Sep 2577°F51°F91°F 201734°F 200123%0%
Sep 2677°F51°F91°F 201738°F 200023%0%
Sep 2776°F51°F92°F 199842°F 201023%0%
Sep 2876°F50°F89°F 202537°F 202223%0%
Sep 2976°F50°F91°F 202538°F 202223%0%
Sep 3075°F50°F90°F 201939°F 200523%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Sullivan, 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 6:23 AM, sunset 7:25 PM
September 30
sunrise 6:50 AM, sunset 6:38 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00118389 (Sullivan 3S), public domain. Records: NOAA GHCN-Daily, station USW00053802, 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.