Hayden climate

Hayden Weather in December

NOAA 1991-2020 normals for San Carlos Reservoir, 31.1 km from Hayden

Average highs run from 62°F on December 1 to 57°F on December 31, and lows from 33°F to 31°F. Normal precipitation for the month is 1.38 in over about 5 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 Hayden, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
59°F
Average low
31°F
Precipitation
1.38 in
Record high
81°FDec 1, 1973
Record low
15°FDec 22, 1968
Chance of a freeze
100%
Daylight
10 h 08 min to 10 h 01 min
Cloud cover
43%
Humidity
47%
Dew point
28°F
Wind
8.1 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation.

DateNormal highNormal lowRecord highRecord lowChance wet
Dec 162°F33°F81°F 197327°F 197513%
Dec 262°F33°F76°F 197327°F 196713%
Dec 361°F33°F80°F 195424°F 196813%
Dec 461°F33°F76°F 195826°F 196814%
Dec 561°F33°F75°F 195827°F 196014%
Dec 660°F32°F77°F 197021°F 196014%
Dec 760°F32°F77°F 197018°F 196014%
Dec 860°F32°F75°F 197018°F 196014%
Dec 959°F32°F72°F 195820°F 197115%
Dec 1059°F32°F73°F 197525°F 196015%
Dec 1159°F32°F73°F 197326°F 197015%
Dec 1259°F31°F72°F 195825°F 197216%
Dec 1359°F31°F70°F 195825°F 196416%
Dec 1458°F31°F70°F 195521°F 196416%
Dec 1558°F31°F74°F 197721°F 197516%
Dec 1658°F31°F73°F 202425°F 201517%
Dec 1758°F31°F73°F 197024°F 197117%
Dec 1858°F31°F74°F 202323°F 196817%
Dec 1958°F31°F73°F 196926°F 196517%
Dec 2057°F31°F71°F 202427°F 196518%
Dec 2157°F31°F72°F 195521°F 196818%
Dec 2257°F31°F70°F 195515°F 196818%
Dec 2357°F31°F73°F 195521°F 196818%
Dec 2457°F31°F74°F 195516°F 197418%
Dec 2557°F31°F72°F 195525°F 197418%
Dec 2657°F31°F73°F 196924°F 197418%
Dec 2757°F31°F71°F 195525°F 197418%
Dec 2857°F31°F70°F 195522°F 196618%
Dec 2957°F31°F72°F 195519°F 196618%
Dec 3057°F31°F71°F 201722°F 196618%
Dec 3157°F31°F70°F 195520°F 195818%

Chance of rain

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

Sunrise and sunset

Times for 2026, local time (MST).

December 1
sunrise 7:08 AM, sunset 5:16 PM
December 31
sunrise 7:26 AM, sunset 5:27 PM

Every day of December: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00027480 (San Carlos Reservoir), public domain. Records: NOAA GHCN-Daily, station USC00027530, 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.