Evanston climate

Evanston Weather in August

NOAA 1991-2020 normals for Evanston 1 E, 1.1 km from Evanston

Average highs run from 82°F on August 1 to 76°F on August 31, and lows from 49°F to 43°F. Normal precipitation for the month is 1.10 in over about 6 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 Evanston, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
80°F
Average low
47°F
Precipitation
1.10 in
Record high
94°FAug 1, 2026
Record low
34°FAug 27, 2004
Chance of a freeze
16%
Daylight
14 h 21 min to 13 h 09 min
Cloud cover
42%
Humidity
42%
Dew point
39°F
Wind
6.9 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
Aug 182°F49°F94°F 202644°F 199917%0%
Aug 282°F49°F92°F 202045°F 200617%0%
Aug 382°F49°F94°F 202449°F 200417%0%
Aug 482°F49°F89°F 202447°F 200618%0%
Aug 582°F49°F92°F 202447°F 202318%0%
Aug 682°F49°F93°F 200148°F 201118%0%
Aug 782°F49°F93°F 202646°F 200918%0%
Aug 881°F49°F92°F 201240°F 200918%0%
Aug 981°F48°F91°F 202638°F 200918%0%
Aug 1081°F48°F91°F 200341°F 200218%0%
Aug 1181°F48°F93°F 201845°F 199918%0%
Aug 1281°F48°F91°F 201843°F 199918%0%
Aug 1381°F48°F90°F 202143°F 200218%0%
Aug 1480°F47°F92°F 202144°F 200518%0%
Aug 1580°F47°F89°F 202340°F 200918%0%
Aug 1680°F47°F89°F 202336°F 200918%0%
Aug 1780°F47°F92°F 202036°F 200918%0%
Aug 1879°F47°F92°F 202041°F 200919%0%
Aug 1979°F46°F91°F 202043°F 202119%0%
Aug 2079°F46°F92°F 202541°F 201619%0%
Aug 2179°F46°F92°F 202644°F 200019%0%
Aug 2278°F46°F93°F 202043°F 200119%0%
Aug 2378°F45°F87°F 202041°F 201019%0%
Aug 2478°F45°F90°F 201139°F 201419%0%
Aug 2578°F45°F89°F 201541°F 201619%0%
Aug 2677°F45°F90°F 201140°F 200419%0%
Aug 2777°F44°F89°F 200134°F 200419%0%
Aug 2877°F44°F88°F 201238°F 200419%0%
Aug 2977°F44°F88°F 201741°F 201819%0%
Aug 3076°F43°F87°F 200736°F 201019%0%
Aug 3176°F43°F88°F 202235°F 200519%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Evanston, in percent, and of at least 0.1 inch of snowfall.051015201102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MDT).

August 1
sunrise 6:19 AM, sunset 8:40 PM
August 31
sunrise 6:49 AM, sunset 7:58 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00483100 (Evanston 1 E), public domain. Records: NOAA GHCN-Daily, station USW00004111, 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.