Morro Bay climate

Morro Bay Weather in December

NOAA 1991-2020 normals for Morro Bay Fire Dept, 0.5 km from Morro Bay

Average highs run from 66°F on December 1 to 64°F on December 31, and lows from 48°F to 46°F. Normal precipitation for the month is 2.75 in over about 7 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 Morro Bay, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
65°F
Average low
46°F
Precipitation
2.75 in
Record high
88°FDec 1, 2021
Record low
22°FDec 22, 1998
Chance of a freeze
3%
Daylight
9 h 57 min to 9 h 49 min
Cloud cover
49%
Humidity
76%
Dew point
46°F
Wind
9.6 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 166°F48°F88°F 202132°F 200418%0%
Dec 266°F47°F80°F 201333°F 200418%0%
Dec 366°F47°F80°F 200631°F 201118%0%
Dec 466°F47°F81°F 200630°F 201119%0%
Dec 565°F47°F87°F 202332°F 201119%0%
Dec 665°F47°F81°F 202425°F 201319%0%
Dec 765°F47°F83°F 201730°F 199819%0%
Dec 865°F47°F83°F 202029°F 200920%0%
Dec 965°F47°F84°F 201728°F 201320%0%
Dec 1065°F46°F83°F 202530°F 199820%0%
Dec 1165°F46°F84°F 201731°F 199820%0%
Dec 1265°F46°F86°F 201730°F 201321%0%
Dec 1365°F46°F83°F 201733°F 200721%0%
Dec 1464°F46°F80°F 201732°F 200821%0%
Dec 1564°F46°F82°F 201332°F 200721%0%
Dec 1664°F46°F85°F 201330°F 200721%0%
Dec 1764°F46°F82°F 201329°F 202221%0%
Dec 1864°F46°F81°F 202432°F 200822%0%
Dec 1964°F46°F83°F 202428°F 200622%0%
Dec 2064°F46°F80°F 199928°F 199822%0%
Dec 2164°F46°F80°F 202024°F 199822%0%
Dec 2264°F46°F74°F 201622°F 199822%0%
Dec 2364°F46°F79°F 199923°F 199822%0%
Dec 2464°F46°F84°F 201323°F 199822%0%
Dec 2564°F46°F84°F 201327°F 199822%0%
Dec 2664°F46°F85°F 201331°F 200022%0%
Dec 2764°F46°F85°F 201329°F 201522%0%
Dec 2864°F46°F81°F 201732°F 200322%0%
Dec 2964°F46°F83°F 201733°F 201822%0%
Dec 3064°F46°F75°F 201331°F 200022%0%
Dec 3164°F46°F75°F 201130°F 200023%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Morro Bay, in percent, and of at least 0.1 inch of snowfall.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PST).

December 1
sunrise 6:54 AM, sunset 4:51 PM
December 31
sunrise 7:12 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 USC00045866 (Morro Bay Fire Dept), public domain. Records: NOAA GHCN-Daily, station USW00093206, 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.