Boulder Creek climate

Boulder Creek Weather in December

NOAA 1991-2020 normals for Ben Lomond #4, 5.9 km from Boulder Creek

Average highs run from 65°F on December 1 to 64°F on December 31, and lows from 38°F to 37°F. Normal precipitation for the month is 10.43 in over about 12 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 Boulder Creek, in °F, with the record for each date.20406080151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
64°F
Average low
37°F
Precipitation
10.43 in
Record high
75°FDec 1, 2021
Record low
24°FDec 24, 1998
Chance of a freeze
92%
Daylight
9 h 47 min to 9 h 39 min
Cloud cover
52%
Humidity
80%
Dew point
42°F
Wind
6.0 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 165°F38°F75°F 202133°F 200434%0%
Dec 265°F38°F71°F 201134°F 200435%0%
Dec 365°F38°F71°F 202432°F 200435%0%
Dec 465°F38°F70°F 202432°F 200435%0%
Dec 565°F37°F71°F 202329°F 201336%0%
Dec 664°F37°F73°F 202430°F 201336%0%
Dec 764°F37°F74°F 202033°F 199837%0%
Dec 864°F37°F74°F 202029°F 200937%0%
Dec 964°F37°F71°F 201525°F 201337%0%
Dec 1064°F37°F70°F 201728°F 201338%0%
Dec 1164°F37°F69°F 201731°F 201338%0%
Dec 1264°F37°F70°F 201929°F 201338%0%
Dec 1363°F37°F67°F 200633°F 200738%0%
Dec 1463°F37°F69°F 201734°F 200739%0%
Dec 1563°F37°F68°F 199831°F 201339%0%
Dec 1663°F37°F72°F 199834°F 199939%0%
Dec 1763°F37°F71°F 202533°F 201639%0%
Dec 1863°F37°F67°F 199830°F 201639%0%
Dec 1963°F37°F70°F 199930°F 201639%0%
Dec 2063°F37°F75°F 199933°F 200639%0%
Dec 2163°F36°F72°F 199927°F 199839%0%
Dec 2263°F36°F69°F 202427°F 199839%0%
Dec 2363°F36°F74°F 202425°F 199839%0%
Dec 2463°F36°F70°F 201324°F 199839%0%
Dec 2563°F36°F67°F 201328°F 199839%0%
Dec 2663°F36°F69°F 200631°F 199839%0%
Dec 2763°F36°F66°F 202430°F 201539%0%
Dec 2863°F37°F72°F 202333°F 201639%0%
Dec 2964°F37°F71°F 202333°F 200639%0%
Dec 3064°F37°F66°F 201332°F 201539%0%
Dec 3164°F37°F64°F 200133°F 201239%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Boulder Creek, 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 (PST).

December 1
sunrise 7:04 AM, sunset 4:51 PM
December 31
sunrise 7:22 AM, sunset 5:01 PM

Every day of December: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00040673 (Ben Lomond #4), public domain. Records: NOAA GHCN-Daily, station USW00023293, 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.