Danville climate

Danville Weather in December

NOAA 1991-2020 normals for Mt Diablo Junction, 8.8 km from Danville

Average highs run from 55°F on December 1 to 53°F on December 31, and lows from 43°F to 41°F. Normal precipitation for the month is 5.08 in over about 11 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 Danville, in °F, with the record for each date.20406080151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
53°F
Average low
41°F
Precipitation
5.08 in
Record high
75°FDec 2, 2011
Record low
24°FDec 10, 2013
Chance of a freeze
49%
Daylight
9 h 44 min to 9 h 36 min
Cloud cover
60%
Humidity
79%
Dew point
40°F
Wind
6.9 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 155°F43°F71°F 202133°F 200431%0%
Dec 255°F42°F75°F 201132°F 200431%0%
Dec 355°F42°F67°F 200734°F 200432%0%
Dec 454°F42°F70°F 201429°F 201332%0%
Dec 554°F42°F68°F 201425°F 201332%0%
Dec 654°F42°F68°F 201426°F 201333%0%
Dec 754°F42°F74°F 202031°F 201333%0%
Dec 854°F42°F69°F 202428°F 201333%0%
Dec 954°F41°F68°F 201527°F 200933%0%
Dec 1053°F41°F70°F 202024°F 201333%0%
Dec 1153°F41°F67°F 201427°F 201334%0%
Dec 1253°F41°F66°F 201728°F 201334%0%
Dec 1353°F41°F65°F 202330°F 201334%0%
Dec 1453°F41°F67°F 201730°F 201334%0%
Dec 1553°F41°F64°F 201629°F 201335%0%
Dec 1653°F41°F67°F 201731°F 199935%0%
Dec 1753°F41°F67°F 202530°F 200835%0%
Dec 1853°F41°F65°F 201328°F 200635%0%
Dec 1953°F41°F74°F 199927°F 200635%0%
Dec 2053°F41°F69°F 199928°F 201235%0%
Dec 2153°F41°F69°F 199929°F 201135%0%
Dec 2253°F41°F70°F 199929°F 200735%0%
Dec 2353°F41°F67°F 201429°F 201135%0%
Dec 2453°F41°F67°F 201326°F 201135%0%
Dec 2553°F41°F64°F 199927°F 201135%0%
Dec 2653°F41°F65°F 200629°F 201135%0%
Dec 2753°F41°F64°F 201728°F 201536%0%
Dec 2853°F41°F67°F 199931°F 200336%0%
Dec 2953°F41°F66°F 202332°F 200036%0%
Dec 3053°F41°F64°F 201630°F 200636%0%
Dec 3153°F41°F65°F 201929°F 201536%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Danville, 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 4:49 PM
December 31
sunrise 7:23 AM, sunset 4:59 PM

Every day of December: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00045915 (Mt Diablo Junction), public domain. Records: NOAA GHCN-Daily, station USW00023254, 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.