Belmont climate

Belmont Weather in December

NOAA 1991-2020 normals for Redwood City, 5.8 km from Belmont

Average highs run from 60°F on December 1 to 58°F on December 31, and lows from 41°F to 40°F. Normal precipitation for the month is 3.92 in over about 9 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 Belmont, in °F, with the record for each date.020406080151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
59°F
Average low
40°F
Precipitation
3.92 in
Record high
76°FDec 12, 1958
Record low
18°FDec 12, 1932
Chance of a freeze
64%
Daylight
9 h 46 min to 9 h 37 min
Cloud cover
58%
Humidity
81%
Dew point
46°F
Wind
10.5 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 160°F41°F73°F 194330°F 193127%0%
Dec 260°F41°F75°F 194130°F 193627%0%
Dec 360°F41°F73°F 195928°F 193628%0%
Dec 459°F41°F74°F 195828°F 193628%0%
Dec 559°F41°F73°F 197627°F 201328%0%
Dec 659°F41°F75°F 202428°F 193128%0%
Dec 759°F41°F75°F 193422°F 199829%0%
Dec 859°F41°F75°F 202425°F 197829%0%
Dec 959°F41°F74°F 193422°F 197229%0%
Dec 1059°F40°F71°F 193425°F 197229%0%
Dec 1159°F40°F72°F 195823°F 193229%0%
Dec 1259°F40°F76°F 195818°F 193229%0%
Dec 1359°F40°F70°F 195319°F 193229%0%
Dec 1458°F40°F71°F 195822°F 193229%0%
Dec 1558°F40°F72°F 198020°F 193229%0%
Dec 1658°F40°F74°F 199826°F 193229%0%
Dec 1758°F40°F73°F 195827°F 196529%0%
Dec 1858°F40°F70°F 199827°F 196529%0%
Dec 1958°F40°F70°F 199929°F 193530%0%
Dec 2058°F40°F71°F 194428°F 196530%0%
Dec 2158°F40°F70°F 199924°F 196830%0%
Dec 2258°F40°F68°F 199919°F 199030%0%
Dec 2358°F40°F69°F 201421°F 199030%0%
Dec 2458°F40°F72°F 201322°F 199030%0%
Dec 2558°F40°F75°F 196725°F 199830%0%
Dec 2658°F40°F74°F 196725°F 199830%0%
Dec 2758°F40°F75°F 196728°F 199030%0%
Dec 2858°F40°F74°F 196726°F 193030%0%
Dec 2958°F40°F72°F 202522°F 193030%0%
Dec 3058°F40°F69°F 195824°F 193031%0%
Dec 3158°F40°F70°F 195828°F 199031%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Belmont, 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 7:05 AM, sunset 4:51 PM
December 31
sunrise 7:24 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 USC00047339 (Redwood City), public domain. Records: NOAA GHCN-Daily, station USC00047339, 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.