Savanna climate

Savanna Weather in September

NOAA 1991-2020 normals for Mt Carroll, 14.3 km from Savanna

Average highs run from 81°F on September 1 to 72°F on September 30, and lows from 55°F to 44°F. Normal precipitation for the month is 3.71 in over about 9 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 Savanna, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
77°F
Average low
50°F
Precipitation
3.71 in
Record high
99°FSep 4, 1925
Record low
14°FSep 30, 1899
Chance of a freeze
24%
Days of 90°F or more
2.0
Daylight
13 h 08 min to 11 h 47 min
Cloud cover
50%
Humidity
73%
Dew point
54°F
Wind
8.9 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 181°F55°F97°F 195335°F 190128%0%
Sep 281°F55°F97°F 191336°F 190928%0%
Sep 381°F54°F95°F 192535°F 190828%0%
Sep 481°F54°F99°F 192534°F 197428%0%
Sep 580°F54°F97°F 189932°F 198828%0%
Sep 680°F53°F99°F 192227°F 198828%0%
Sep 780°F53°F99°F 193927°F 198828%0%
Sep 880°F53°F98°F 192230°F 198828%0%
Sep 979°F52°F96°F 191233°F 198628%0%
Sep 1079°F52°F98°F 201333°F 191028%0%
Sep 1179°F52°F97°F 201334°F 199328%0%
Sep 1278°F51°F94°F 190829°F 190228%0%
Sep 1378°F51°F95°F 193930°F 190228%0%
Sep 1478°F50°F97°F 193932°F 197528%0%
Sep 1577°F50°F97°F 193930°F 198928%0%
Sep 1677°F50°F95°F 193131°F 198928%0%
Sep 1777°F49°F92°F 192532°F 193728%0%
Sep 1876°F49°F94°F 198826°F 190328%0%
Sep 1976°F48°F92°F 190829°F 190128%0%
Sep 2076°F48°F93°F 192029°F 195628%0%
Sep 2175°F48°F93°F 190830°F 199128%0%
Sep 2275°F47°F90°F 193726°F 197628%0%
Sep 2374°F47°F92°F 201723°F 198328%0%
Sep 2474°F46°F95°F 201720°F 198928%0%
Sep 2574°F46°F94°F 192024°F 198928%0%
Sep 2673°F45°F93°F 201724°F 192828%0%
Sep 2773°F45°F90°F 199822°F 198928%0%
Sep 2872°F45°F90°F 193923°F 198928%0%
Sep 2972°F44°F94°F 195326°F 190828%0%
Sep 3072°F44°F90°F 197114°F 189928%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Savanna, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 6:26 AM, sunset 7:34 PM
September 30
sunrise 6:57 AM, sunset 6:44 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00115901 (Mt Carroll), public domain. Records: NOAA GHCN-Daily, station USC00115901, 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.