Weather on December 30
San Mateo, CA
55 Years of Data
About This Date
December 30th in San Mateo, CA typically brings cool winter weather, with average highs around 56°F and lows near 44°F. Over 55 years of records, the warmest December 30th was in 1996 (60°F average), while the coldest was 1990 (42°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 35% of December 30th dates historically, with the wettest December 30th recording 2.75" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for December 30th in San Mateo, CA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 52° | 45° | 48° | — | — |
| 2024 | 59° | 46° | 53° | — | — |
| 2023 | 62° | 52° | 57° | 0.19" | — |
| 2022 | 64° | 56° | 60° | 0.52" | — |
| 2021 | 53° | 45° | 49° | — | — |
| 2020 | 57° | 40° | 48° | 0.04" | — |
| 2019 | 59° | 47° | 53° | — | — |
| 2018 | 59° | 45° | 52° | — | — |
| 2017 | 59° | 43° | 51° | — | — |
| 2016 | 56° | 43° | 49° | — | — |
| 2015 | 49° | 40° | 44° | 0.01" | — |
| 2014 | 55° | 47° | 51° | — | — |
| 2013 | 59° | 42° | 51° | — | — |
| 2012 | 55° | 40° | 47° | — | — |
| 2011 | 54° | 49° | 51° | — | — |
| 2010 | 52° | 41° | 46° | — | — |
| 2009 | 54° | 49° | 51° | 0.02" | — |
| 2008 | 55° | 44° | 50° | — | — |
| 2007 | 52° | 44° | 48° | — | — |
| 2006 | 53° | 38° | 45° | — | — |
| 2005 | 61° | 52° | 56° | 0.55" | — |
| 2004 | 58° | 51° | 54° | 0.54" | — |
| 2003 | 53° | 47° | 50° | 0.02" | — |
| 2002 | 55° | 47° | 51° | 0.11" | — |
| 2001 | 57° | 53° | 55° | 0.7" | — |
| 2000 | 58° | 40° | 49° | — | — |
| 1999 | 59° | 40° | 49° | — | — |
| 1998 | 53° | 39° | 46° | — | — |
| 1997 | 59° | 43° | 51° | — | — |
| 1996warmest | 64° | 55° | 60° | 0.08" | — |
| 1995 | 60° | 57° | 59° | 0.01" | — |
| 1994 | 51° | 35° | 43° | — | — |
| 1993 | 60° | 44° | 52° | — | — |
| 1992 | 55° | 42° | 49° | 0.06" | — |
| 1991 | 55° | 45° | 50° | — | — |
| 1990coldest | 50° | 33° | 42° | — | — |
| 1989 | 61° | 42° | 51° | — | — |
| 1988 | 52° | 37° | 44° | 0.13" | — |
| 1987 | 50° | 37° | 44° | — | — |
| 1986 | 55° | 41° | 48° | — | — |
| 1985 | 53° | 47° | 50° | 0.16" | — |
| 1984 | 48° | 41° | 45° | — | — |
| 1983 | 63° | 53° | 58° | 0.5" | — |
| 1982 | 54° | 33° | 43° | — | — |
| 1981 | 57° | 51° | 54° | — | — |
| 1980 | 55° | 42° | 49° | — | — |
| 1979 | 63° | 50° | 56° | 0.31" | — |
| 1978 | 49° | 40° | 44° | — | — |
| 1977 | 59° | 44° | 52° | 0.27" | — |
| 1976 | 57° | 45° | 51° | 2.75" | — |
| 1975 | 58° | 41° | 49° | — | — |
| 1974 | 58° | 44° | 51° | — | — |
| 1973 | 57° | 43° | 50° | — | — |
| 1972 | 55° | 34° | 44° | — | — |
| 1971 | 55° | 36° | 45° | — | — |
San Mateo, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
San Mateo, CA Monthly Precipitation
Average rainfall per month, in inches.
San Mateo, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit San Mateo, CA
Most pleasant months in San Mateo, CA: April, May, June, July, August, September, October.
What to expect on December 30th
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
December 30th outlook →