Summit County climate

Summit County Weather in August

NOAA 1991-2020 normals for Coalville 13 E, 17.9 km from Summit County

Average highs run from 79°F on August 1 to 73°F on August 31, and lows from 43°F to 37°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 Summit County, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
77°F
Average low
40°F
Record high
94°FAug 1, 2026
Record low
34°FAug 27, 2004
Chance of a freeze
66%
Days of 90°F or more
0.6
Daylight
14 h 19 min to 13 h 08 min
Cloud cover
42%
Humidity
43%
Dew point
38°F
Wind
5.1 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 179°F43°F94°F 202644°F 19990%
Aug 279°F43°F92°F 202045°F 20060%
Aug 379°F43°F94°F 202449°F 20040%
Aug 479°F42°F89°F 202447°F 20060%
Aug 579°F42°F92°F 202447°F 20230%
Aug 679°F42°F93°F 200148°F 20110%
Aug 778°F42°F93°F 202646°F 20090%
Aug 878°F42°F92°F 201240°F 20090%
Aug 978°F42°F91°F 202638°F 20090%
Aug 1078°F42°F91°F 200341°F 20020%
Aug 1178°F42°F93°F 201845°F 19990%
Aug 1278°F41°F91°F 201843°F 19990%
Aug 1377°F41°F90°F 202143°F 20020%
Aug 1477°F41°F92°F 202144°F 20050%
Aug 1577°F41°F89°F 202340°F 20090%
Aug 1677°F41°F89°F 202336°F 20090%
Aug 1777°F40°F92°F 202036°F 20090%
Aug 1876°F40°F92°F 202041°F 20090%
Aug 1976°F40°F91°F 202043°F 20210%
Aug 2076°F40°F92°F 202541°F 20160%
Aug 2176°F40°F92°F 202644°F 20000%
Aug 2275°F39°F93°F 202043°F 20010%
Aug 2375°F39°F87°F 202041°F 20100%
Aug 2475°F39°F90°F 201139°F 20140%
Aug 2575°F39°F89°F 201541°F 20160%
Aug 2674°F39°F90°F 201140°F 20040%
Aug 2774°F38°F89°F 200134°F 20040%
Aug 2874°F38°F88°F 201238°F 20040%
Aug 2974°F38°F88°F 201741°F 20180%
Aug 3073°F38°F87°F 200736°F 20100%
Aug 3173°F37°F88°F 202235°F 20050%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Summit County, 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 (MDT).

August 1
sunrise 6:20 AM, sunset 8:39 PM
August 31
sunrise 6:50 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 USC00421590 (Coalville 13 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.