Fairfax climate

Fairfax Weather in August

NOAA 1991-2020 normals for Tarkio, 10.6 km from Fairfax

Average highs run from 85°F on August 1 to 83°F on August 31, and lows from 65°F to 60°F.

August day by day

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

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

August at a glance

Average high
84°F
Average low
63°F
Record high
114°FAug 8, 1934
Record low
35°FAug 16, 1929
Chance of a freeze
0%
Days of 90°F or more
8.0
Daylight
14 h 17 min to 13 h 07 min
Cloud cover
49%
Humidity
68%
Dew point
63°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
Aug 185°F65°F103°F 193453°F 19130%
Aug 285°F65°F105°F 194653°F 19860%
Aug 385°F65°F112°F 191852°F 19740%
Aug 485°F65°F110°F 191847°F 19930%
Aug 585°F65°F113°F 193450°F 19940%
Aug 685°F64°F110°F 193450°F 19900%
Aug 785°F64°F113°F 193445°F 19890%
Aug 885°F64°F114°F 193447°F 19890%
Aug 985°F64°F113°F 193448°F 19270%
Aug 1085°F64°F107°F 193448°F 19170%
Aug 1185°F64°F109°F 194746°F 19310%
Aug 1285°F64°F106°F 193645°F 19640%
Aug 1385°F63°F114°F 193647°F 19640%
Aug 1485°F63°F108°F 191348°F 19290%
Aug 1585°F63°F107°F 191345°F 19290%
Aug 1685°F63°F107°F 191335°F 19290%
Aug 1785°F63°F110°F 193646°F 20120%
Aug 1885°F63°F110°F 193645°F 20120%
Aug 1984°F62°F106°F 193648°F 19320%
Aug 2084°F62°F104°F 191342°F 19500%
Aug 2184°F62°F104°F 191346°F 19560%
Aug 2284°F62°F110°F 191847°F 19230%
Aug 2384°F62°F103°F 192245°F 19660%
Aug 2484°F61°F108°F 192246°F 20150%
Aug 2584°F61°F110°F 193646°F 19580%
Aug 2684°F61°F107°F 192446°F 19880%
Aug 2783°F61°F107°F 191350°F 19220%
Aug 2883°F60°F107°F 200041°F 19880%
Aug 2983°F60°F105°F 198442°F 19460%
Aug 3083°F60°F107°F 194745°F 19920%
Aug 3183°F60°F107°F 191345°F 19180%

Chance of rain

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

August 1
sunrise 6:19 AM, sunset 8:36 PM
August 31
sunrise 6:48 AM, sunset 7:55 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00014945 (Tarkio), public domain. Records: NOAA GHCN-Daily, station USW00094957, 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.