Summit County climate

Summit County Weather in December

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

Average highs run from 35°F on December 1 to 32°F on December 31, and lows from 8°F to 4°F.

December 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.-200204060151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
33°F
Average low
5°F
Snowfall
18.5 in
Record high
59°FDec 2, 2021
Record low
-14°FDec 7, 2005
Chance of a freeze
100%
Daylight
9 h 28 min to 9 h 18 min
Cloud cover
63%
Humidity
85%
Dew point
15°F
Wind
6.3 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
Dec 135°F8°F54°F 20214°F 201519%
Dec 235°F7°F59°F 20212°F 200420%
Dec 335°F7°F56°F 20211°F 200620%
Dec 434°F7°F53°F 2021-7°F 201320%
Dec 534°F6°F47°F 2014-10°F 201320%
Dec 634°F6°F51°F 2023-8°F 201321%
Dec 734°F6°F48°F 2008-14°F 200521%
Dec 833°F5°F50°F 2020-12°F 200521%
Dec 933°F5°F52°F 2020-9°F 200922%
Dec 1033°F5°F52°F 2014-3°F 200922%
Dec 1133°F5°F51°F 20144°F 199922%
Dec 1233°F5°F53°F 2017-1°F 200722%
Dec 1333°F4°F51°F 20251°F 202023%
Dec 1432°F4°F56°F 20252°F 199923%
Dec 1532°F4°F52°F 2025-1°F 200723%
Dec 1632°F4°F50°F 2025-2°F 200123%
Dec 1732°F4°F46°F 2023-4°F 201024%
Dec 1832°F4°F48°F 2023-6°F 201624%
Dec 1932°F4°F50°F 2025-4°F 200624%
Dec 2032°F4°F52°F 2024-1°F 201224%
Dec 2132°F4°F50°F 20251°F 200725%
Dec 2232°F4°F51°F 2025-1°F 200725%
Dec 2332°F4°F49°F 2025-1°F 200425%
Dec 2432°F4°F54°F 2025-2°F 200125%
Dec 2532°F4°F48°F 20251°F 201025%
Dec 2632°F4°F42°F 2006-3°F 200825%
Dec 2732°F4°F43°F 2022-7°F 201526%
Dec 2832°F4°F45°F 2023-5°F 201526%
Dec 2932°F4°F48°F 2017-3°F 201826%
Dec 3032°F4°F48°F 2011-8°F 201426%
Dec 3132°F4°F46°F 2023-13°F 201427%

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.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MST).

December 1
sunrise 7:29 AM, sunset 4:57 PM
December 31
sunrise 7:48 AM, sunset 5:06 PM

Every day of December: 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.