Sister Bay climate

Sister Bay Weather in December

NOAA 1991-2020 normals for Ephraim 1NE-Wwtp, 3.1 km from Sister Bay

Average highs run from 37°F on December 1 to 29°F on December 31, and lows from 25°F to 14°F. Normal precipitation for the month is 1.70 in over about 10 wet days.

December day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Sister Bay, 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
19°F
Precipitation
1.70 in
Snowfall
13.8 in
Record high
58°FDec 4, 2012
Record low
-11°FDec 30, 2013
Chance of a freeze
100%
Daylight
9 h 01 min to 8 h 49 min
Cloud cover
73%
Humidity
85%
Dew point
27°F
Wind
17.4 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 137°F25°F48°F 20178°F 201429%12%
Dec 237°F24°F47°F 20121°F 201429%12%
Dec 337°F24°F47°F 201211°F 202529%13%
Dec 436°F23°F58°F 20129°F 202529%13%
Dec 536°F23°F52°F 20178°F 202529%13%
Dec 636°F23°F46°F 20156°F 201329%14%
Dec 735°F22°F44°F 20154°F 201329%14%
Dec 835°F22°F43°F 20232°F 201329%14%
Dec 935°F21°F49°F 20231°F 202529%15%
Dec 1034°F21°F47°F 20201°F 201329%15%
Dec 1134°F21°F50°F 20200°F 201929%15%
Dec 1234°F20°F47°F 2011-2°F 201329%16%
Dec 1333°F20°F43°F 20152°F 202429%16%
Dec 1433°F20°F52°F 20157°F 201329%16%
Dec 1533°F19°F50°F 20151°F 201629%16%
Dec 1632°F19°F54°F 2021-2°F 200829%17%
Dec 1732°F18°F45°F 2023-2°F 201330%17%
Dec 1832°F18°F41°F 2023-2°F 200829%17%
Dec 1931°F18°F40°F 2011-3°F 201630%17%
Dec 2031°F17°F42°F 20183°F 201030%18%
Dec 2131°F17°F42°F 20153°F 202230%18%
Dec 2231°F17°F42°F 20193°F 202230%18%
Dec 2330°F17°F44°F 20193°F 200830%18%
Dec 2430°F16°F51°F 2015-3°F 202230%18%
Dec 2530°F16°F43°F 2023-2°F 201330%18%
Dec 2630°F16°F51°F 2023-6°F 201730%19%
Dec 2729°F15°F46°F 2016-7°F 201730%19%
Dec 2829°F15°F46°F 2018-9°F 201730%19%
Dec 2929°F15°F45°F 2018-5°F 201729%19%
Dec 3029°F15°F45°F 2022-11°F 201329%19%
Dec 3129°F14°F44°F 2010-8°F 201329%19%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Sister Bay, 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 (CST).

December 1
sunrise 7:07 AM, sunset 4:08 PM
December 31
sunrise 7:27 AM, sunset 4:16 PM

Every day of December: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00472626 (Ephraim 1NE-Wwtp), public domain. Records: NOAA GHCN-Daily, station USC00472626, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.