Frontenac climate

Frontenac Weather in August

NOAA 1991-2020 normals for St Charles 7 Ssw, 10.9 km from Frontenac

Average highs run from 89°F on August 1 to 85°F on August 31, and lows from 69°F to 64°F. Normal precipitation for the month is 3.54 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 Frontenac, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
88°F
Average low
67°F
Precipitation
3.54 in
Record high
107°FAug 29, 1984
Record low
47°FAug 29, 1965
Chance of a freeze
0%
Days of 90°F or more
11.6
Daylight
14 h 09 min to 13 h 03 min
Cloud cover
48%
Humidity
69%
Dew point
65°F
Wind
4.5 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 189°F69°F104°F 198057°F 196224%0%
Aug 289°F69°F103°F 198758°F 197323%0%
Aug 389°F69°F104°F 196454°F 195023%0%
Aug 489°F69°F102°F 194755°F 197424%0%
Aug 589°F69°F102°F 194756°F 194823%0%
Aug 689°F69°F104°F 194755°F 194823%0%
Aug 788°F69°F100°F 198055°F 197223%0%
Aug 888°F69°F102°F 198053°F 197623%0%
Aug 988°F68°F105°F 198055°F 197223%0%
Aug 1088°F68°F101°F 194154°F 197223%0%
Aug 1188°F68°F102°F 194156°F 196723%0%
Aug 1288°F68°F102°F 200751°F 196723%0%
Aug 1388°F68°F100°F 201050°F 196423%0%
Aug 1488°F68°F103°F 200756°F 196723%0%
Aug 1588°F68°F105°F 200751°F 199223%0%
Aug 1688°F67°F102°F 198856°F 196423%0%
Aug 1788°F67°F103°F 198858°F 194323%0%
Aug 1888°F67°F103°F 195454°F 196323%0%
Aug 1987°F67°F105°F 196255°F 195323%0%
Aug 2087°F67°F104°F 196252°F 195023%0%
Aug 2187°F67°F104°F 200350°F 194023%0%
Aug 2287°F66°F100°F 193855°F 195022%0%
Aug 2387°F66°F102°F 193854°F 196622%0%
Aug 2487°F66°F103°F 194751°F 194222%0%
Aug 2587°F66°F104°F 202352°F 195822%0%
Aug 2686°F65°F101°F 194355°F 194522%0%
Aug 2786°F65°F102°F 202451°F 196822%0%
Aug 2886°F65°F101°F 199048°F 198622%0%
Aug 2986°F65°F107°F 198447°F 196522%0%
Aug 3086°F64°F102°F 201351°F 194622%0%
Aug 3185°F64°F103°F 201149°F 196722%0%

Chance of rain

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

August 1
sunrise 6:03 AM, sunset 8:12 PM
August 31
sunrise 6:30 AM, sunset 7:33 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00237398 (St Charles 7 Ssw), public domain. Records: NOAA GHCN-Daily, station USW00013994, 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.