Franklin County climate

Franklin County Weather in August

NOAA 1991-2020 normals for Rend Lake Dam, 7.8 km from Franklin County

Average highs run from 88°F on August 1 to 85°F on August 31, and lows from 69°F to 63°F. Normal precipitation for the month is 3.35 in over about 7 wet days.

August day by day

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

Normal daily high and low temperature at Franklin County, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
87°F
Average low
66°F
Precipitation
3.35 in
Record high
113°FAug 9, 1930
Record low
41°FAug 12, 1902
Chance of a freeze
0%
Days of 90°F or more
7.8
Daylight
14 h 06 min to 13 h 01 min
Cloud cover
47%
Humidity
71%
Dew point
65°F
Wind
6.7 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
Aug 188°F69°F100°F 193050°F 191825%0%
Aug 288°F69°F103°F 190149°F 192025%0%
Aug 388°F69°F107°F 191847°F 192025%0%
Aug 488°F68°F106°F 191847°F 191225%0%
Aug 588°F68°F108°F 191847°F 191225%0%
Aug 688°F68°F109°F 194748°F 195725%0%
Aug 788°F68°F108°F 193048°F 195725%0%
Aug 888°F68°F111°F 193046°F 198925%0%
Aug 988°F68°F113°F 193048°F 198925%0%
Aug 1088°F68°F104°F 192647°F 197224%0%
Aug 1188°F68°F106°F 191848°F 193124%0%
Aug 1288°F67°F103°F 193641°F 190224%0%
Aug 1388°F67°F103°F 200746°F 196424%0%
Aug 1487°F67°F102°F 190248°F 200424%0%
Aug 1587°F67°F103°F 191849°F 196224%0%
Aug 1687°F67°F104°F 200748°F 200424%0%
Aug 1787°F67°F109°F 193649°F 200424%0%
Aug 1887°F66°F110°F 193651°F 197623%0%
Aug 1987°F66°F106°F 193651°F 197623%0%
Aug 2087°F66°F104°F 193646°F 195323%0%
Aug 2186°F66°F104°F 193645°F 194023%0%
Aug 2286°F65°F103°F 193647°F 194023%0%
Aug 2386°F65°F102°F 193846°F 192322%0%
Aug 2486°F65°F103°F 193846°F 192022%0%
Aug 2586°F65°F102°F 194346°F 192722%0%
Aug 2686°F64°F101°F 193645°F 191022%0%
Aug 2785°F64°F110°F 193646°F 191022%0%
Aug 2885°F64°F106°F 193647°F 196722%0%
Aug 2985°F64°F104°F 192545°F 196522%0%
Aug 3085°F63°F102°F 192443°F 198822%0%
Aug 3185°F63°F101°F 195341°F 191522%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Franklin County, 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).

August 1
sunrise 5:59 AM, sunset 8:05 PM
August 31
sunrise 6:25 AM, sunset 7:26 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00117187 (Rend Lake Dam), public domain. Records: NOAA GHCN-Daily, station USC00111265, 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.