Lewiston climate

Lewiston Weather in August

NOAA 1991-2020 normals for Lewiston Nez Perce CO AP, 4.7 km from Lewiston

Average highs run from 94°F on August 1 to 86°F on August 31, and lows from 63°F to 57°F. Normal precipitation for the month is 0.51 in over about 3 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 Lewiston, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
90°F
Average low
60°F
Precipitation
0.51 in
Record high
115°FAug 4, 1961
Record low
41°FAug 24, 1992
Chance of a freeze
0%
Days of 90°F or more
16.9
Daylight
14 h 49 min to 13 h 21 min
Cloud cover
36%
Humidity
47%
Dew point
47°F
Wind
6.0 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 194°F63°F106°F 197149°F 195611%0%
Aug 294°F63°F111°F 202444°F 195611%0%
Aug 393°F63°F107°F 196145°F 195611%0%
Aug 493°F63°F115°F 196145°F 195411%0%
Aug 593°F63°F108°F 199849°F 194811%0%
Aug 693°F62°F103°F 201948°F 196911%0%
Aug 793°F62°F107°F 201248°F 200211%0%
Aug 893°F62°F106°F 197250°F 194911%0%
Aug 992°F62°F111°F 201850°F 194911%0%
Aug 1092°F62°F108°F 201846°F 195411%0%
Aug 1192°F62°F105°F 197149°F 195411%0%
Aug 1292°F61°F106°F 200149°F 195711%0%
Aug 1391°F61°F105°F 198147°F 199511%0%
Aug 1491°F61°F105°F 200448°F 194911%0%
Aug 1591°F61°F109°F 202352°F 195411%0%
Aug 1690°F61°F108°F 202047°F 194811%0%
Aug 1790°F60°F108°F 200849°F 195211%0%
Aug 1890°F60°F106°F 197747°F 195911%0%
Aug 1989°F60°F105°F 196146°F 198011%0%
Aug 2089°F60°F104°F 197746°F 194811%0%
Aug 2189°F59°F106°F 202647°F 196011%0%
Aug 2289°F59°F103°F 196145°F 199211%0%
Aug 2388°F59°F103°F 196942°F 199212%0%
Aug 2488°F59°F106°F 196641°F 199212%0%
Aug 2588°F58°F102°F 195843°F 199212%0%
Aug 2687°F58°F100°F 201144°F 195212%0%
Aug 2787°F58°F102°F 200943°F 196212%0%
Aug 2887°F58°F103°F 200643°F 196012%0%
Aug 2986°F57°F105°F 201742°F 198012%0%
Aug 3086°F57°F102°F 202242°F 196512%0%
Aug 3186°F57°F106°F 196745°F 196613%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Lewiston, in percent, and of at least 0.1 inch of snowfall.02.557.51012.51102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PDT).

August 1
sunrise 5:30 AM, sunset 8:19 PM
August 31
sunrise 6:07 AM, sunset 7:28 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00024149 (Lewiston Nez Perce CO AP), public domain. Records: NOAA GHCN-Daily, station USW00024149, 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.