Weather on December 15
Hayward, CA
55 Years of Data
About This Date
December 15th in Hayward, CA typically brings cool winter weather, with average highs around 58°F and lows near 43°F. Over 53 years of records, the warmest December 15th was in 1983 (59°F average), while the coldest was 1971 (41°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 25% of December 15th dates historically, with the wettest December 15th recording 4.17" 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 15th in Hayward, CA? Bring layers as temperatures can vary throughout the day.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 53° | 40° | 46° | — | — |
| 2024 | 57° | 42° | 50° | — | — |
| 2023 | 64° | 43° | 53° | — | — |
| 2022 | 55° | 39° | 47° | — | — |
| 2021 | 54° | 43° | 48° | 0.13" | — |
| 2020 | 59° | 43° | 51° | — | — |
| 2019 | 57° | 41° | 49° | — | — |
| 2018 | 65° | 50° | 57° | — | — |
| 2017 | 59° | 41° | 50° | — | — |
| 2016 | 63° | 52° | 57° | 2.18" | — |
| 2015 | 57° | 35° | 46° | — | — |
| 2014 | 58° | 51° | 54° | 2.24" | — |
| 2013 | 59° | 35° | 47° | — | — |
| 2012 | 50° | 37° | 44° | 0.13" | — |
| 2011 | 55° | 41° | 48° | 0.2" | — |
| 2010 | 56° | 43° | 49° | — | — |
| 2009 | 61° | 47° | 54° | — | — |
| 2008 | 52° | 40° | 46° | 0.43" | — |
| 2007 | 56° | 41° | 48° | — | — |
| 2006 | 58° | 48° | 53° | 0.08" | — |
| 2005 | 56° | 42° | 49° | — | — |
| 2004 | 64° | 44° | 54° | — | — |
| 2003 | 57° | 40° | 48° | — | — |
| 2002 | 59° | 53° | 56° | 0.64" | — |
| 2001 | 55° | 37° | 46° | — | — |
| 2000 | 59° | 48° | 54° | 0.15" | — |
| 1999 | 56° | 38° | 47° | — | — |
| 1998 | 68° | 40° | 54° | — | — |
| 1997 | 55° | 41° | 48° | — | — |
| 1996 | 54° | 49° | 51° | — | — |
| 1995 | 59° | 54° | 56° | — | — |
| 1994 | 61° | 57° | 59° | — | — |
| 1993 | 53° | 41° | 47° | — | — |
| 1992 | 56° | 39° | 47° | — | — |
| 1989 | 66° | 42° | 54° | — | — |
| 1988 | 53° | 49° | 51° | — | — |
| 1987 | 53° | 39° | 46° | — | — |
| 1986 | 48° | 46° | 47° | — | — |
| 1985 | 57° | 40° | 48° | — | — |
| 1984 | 61° | 41° | 51° | 0.58" | — |
| 1983warmest | 65° | 54° | 59° | — | — |
| 1982 | 52° | 40° | 46° | — | — |
| 1981 | 66° | 43° | 54° | — | — |
| 1980 | 66° | 42° | 54° | — | — |
| 1979 | 63° | 44° | 53° | — | — |
| 1978 | 63° | 42° | 52° | — | — |
| 1977 | 60° | 43° | 51° | 4.17" | — |
| 1976 | 66° | 46° | 56° | — | — |
| 1975 | 55° | 38° | 46° | — | — |
| 1974 | 53° | 45° | 49° | 0.08" | — |
| 1973 | 57° | 39° | 48° | — | — |
| 1972 | 58° | 26° | 42° | — | — |
| 1971coldest | 48° | 33° | 41° | 0.2" | — |
Hayward, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Hayward, CA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Hayward, 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 Hayward, CA
Most pleasant months in Hayward, CA: August.