Cook County climate

Cook County Weather in August

NOAA 1991-2020 normals for Grand Marais, 17.5 km from Cook County

Average highs run from 71°F on August 1 to 67°F on August 31, and lows from 55°F to 52°F. Normal precipitation for the month is 2.56 in over about 9 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 Cook County, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
70°F
Average low
54°F
Precipitation
2.56 in
Record high
92°FAug 2, 2024
Record low
39°FAug 20, 2004
Chance of a freeze
0%
Daylight
14 h 58 min to 13 h 26 min
Cloud cover
58%
Humidity
73%
Dew point
54°F
Wind
6.5 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 171°F55°F87°F 201744°F 201529%0%
Aug 271°F55°F92°F 202444°F 200229%0%
Aug 371°F55°F88°F 202345°F 201529%0%
Aug 471°F55°F85°F 201047°F 201529%0%
Aug 571°F55°F81°F 200147°F 199929%0%
Aug 671°F55°F85°F 200348°F 200929%0%
Aug 771°F55°F83°F 200748°F 200929%0%
Aug 871°F55°F77°F 200845°F 202628%0%
Aug 971°F55°F86°F 199846°F 201928%0%
Aug 1071°F55°F84°F 199846°F 200428%0%
Aug 1171°F55°F83°F 202046°F 200428%0%
Aug 1270°F55°F83°F 201747°F 200328%0%
Aug 1370°F55°F77°F 201246°F 200428%0%
Aug 1470°F55°F85°F 200745°F 200428%0%
Aug 1570°F55°F78°F 200646°F 200528%0%
Aug 1670°F54°F89°F 200846°F 200029%0%
Aug 1770°F54°F81°F 201148°F 201029%0%
Aug 1870°F54°F79°F 202142°F 200429%0%
Aug 1969°F54°F79°F 201140°F 200429%0%
Aug 2069°F54°F79°F 202339°F 200429%0%
Aug 2169°F54°F91°F 201341°F 200429%0%
Aug 2269°F54°F83°F 200344°F 200929%0%
Aug 2369°F54°F79°F 202143°F 200929%0%
Aug 2468°F53°F87°F 202047°F 201730%0%
Aug 2568°F53°F81°F 200044°F 201730%0%
Aug 2668°F53°F82°F 200346°F 200830%0%
Aug 2768°F53°F78°F 200144°F 201530%0%
Aug 2867°F53°F82°F 199844°F 201930%0%
Aug 2967°F52°F80°F 199842°F 200431%0%
Aug 3067°F52°F80°F 201341°F 201931%0%
Aug 3167°F52°F85°F 201243°F 202231%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Cook County, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

August 1
sunrise 5:39 AM, sunset 8:37 PM
August 31
sunrise 6:19 AM, sunset 7:45 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00213282 (Grand Marais), public domain. Records: NOAA GHCN-Daily, station USW00094992, 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.