Mountain View climate

Mountain View Weather in December

NOAA 1991-2020 normals for Glenwood #2 55.4, 5.4 km from Mountain View

Average highs run from 74°F on December 1 to 74°F on December 31, and lows from 58°F to 57°F. Normal precipitation for the month is 22.30 in over about 23 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 Mountain View, in °F, with the record for each date.5060708090100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
74°F
Average low
57°F
Precipitation
22.30 in
Record high
93°FDec 14, 1980
Record low
55°FDec 23, 1977
Chance of a freeze
0%
Daylight
11 h 03 min to 10 h 59 min
Cloud cover
56%
Humidity
82%
Dew point
63°F
Wind
11.6 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation.

DateNormal highNormal lowRecord highRecord lowChance wet
Dec 174°F58°F86°F 197759°F 197278%
Dec 274°F58°F85°F 195759°F 197277%
Dec 374°F58°F87°F 196659°F 195677%
Dec 474°F58°F88°F 196659°F 195477%
Dec 574°F58°F86°F 197760°F 196276%
Dec 674°F58°F91°F 197760°F 196276%
Dec 774°F58°F86°F 198858°F 195876%
Dec 874°F58°F87°F 199557°F 195876%
Dec 974°F58°F88°F 197758°F 196075%
Dec 1074°F58°F85°F 196260°F 195075%
Dec 1174°F58°F88°F 197358°F 198975%
Dec 1274°F58°F87°F 198060°F 195374%
Dec 1374°F58°F87°F 199560°F 195374%
Dec 1474°F58°F93°F 198061°F 195274%
Dec 1574°F57°F86°F 197958°F 198973%
Dec 1674°F57°F87°F 196857°F 201773%
Dec 1774°F57°F86°F 196759°F 195572%
Dec 1874°F57°F87°F 202557°F 197572%
Dec 1974°F57°F85°F 197957°F 196972%
Dec 2074°F57°F87°F 196458°F 197271%
Dec 2174°F57°F90°F 196457°F 196971%
Dec 2274°F57°F89°F 198059°F 194970%
Dec 2374°F57°F87°F 196455°F 197769%
Dec 2474°F57°F87°F 198056°F 197869%
Dec 2574°F57°F87°F 198058°F 195868%
Dec 2674°F57°F86°F 199660°F 195967%
Dec 2774°F57°F87°F 199660°F 195166%
Dec 2874°F57°F85°F 196859°F 196266%
Dec 2974°F57°F86°F 199559°F 199965%
Dec 3074°F57°F86°F 199559°F 199964%
Dec 3174°F57°F86°F 197357°F 195864%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Mountain View, in percent.0204060801102030
  • Chance of a wet day

Sunrise and sunset

Times for 2026, local time (HST).

December 1
sunrise 6:38 AM, sunset 5:41 PM
December 31
sunrise 6:54 AM, sunset 5:53 PM

Every day of December: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00510746 (Glenwood #2 55.4), public domain. Records: NOAA GHCN-Daily, station USW00021504, 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.