Hayward Weather in December
Average highs run from 34°F on December 1 to 25°F on December 31, and lows from 17°F to 6°F. Normal precipitation for the month is 1.26 in over about 10 wet days.
December day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 29°F
- Average low
- 11°F
- Precipitation
- 1.26 in
- Snowfall
- 12.5 in
- Record high
- 59°FDec 2, 1998
- Record low
- -32°FDec 26, 1996
- Chance of a freeze
- 100%
- Daylight
- 8 h 54 min to 8 h 42 min
- Cloud cover
- 73%
- Humidity
- 93%
- Dew point
- 14°F
- Wind
- 8.3 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.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Dec 1 | 34°F | 17°F | 56°F 1998 | -8°F 2014 | 32% | 22% |
| Dec 2 | 33°F | 16°F | 59°F 1998 | -4°F 2000 | 32% | 23% |
| Dec 3 | 33°F | 16°F | 58°F 1998 | -10°F 2002 | 32% | 23% |
| Dec 4 | 33°F | 16°F | 54°F 2017 | -13°F 2025 | 32% | 23% |
| Dec 5 | 32°F | 15°F | 57°F 2001 | -12°F 2007 | 32% | 24% |
| Dec 6 | 32°F | 15°F | 44°F 2012 | -17°F 2007 | 32% | 24% |
| Dec 7 | 31°F | 14°F | 50°F 2023 | -23°F 2013 | 32% | 24% |
| Dec 8 | 31°F | 14°F | 45°F 1999 | -22°F 2013 | 32% | 25% |
| Dec 9 | 31°F | 13°F | 47°F 2020 | -11°F 2007 | 32% | 25% |
| Dec 10 | 30°F | 13°F | 48°F 2020 | -17°F 2000 | 32% | 25% |
| Dec 11 | 30°F | 13°F | 44°F 2001 | -19°F 2019 | 32% | 25% |
| Dec 12 | 30°F | 12°F | 47°F 1998 | -22°F 2000 | 32% | 25% |
| Dec 13 | 29°F | 12°F | 46°F 1998 | -18°F 2010 | 32% | 26% |
| Dec 14 | 29°F | 11°F | 51°F 1998 | -21°F 2010 | 32% | 26% |
| Dec 15 | 29°F | 11°F | 46°F 2014 | -25°F 2013 | 32% | 26% |
| Dec 16 | 28°F | 11°F | 59°F 2021 | -21°F 2008 | 32% | 26% |
| Dec 17 | 28°F | 10°F | 43°F 1997 | -17°F 2008 | 31% | 26% |
| Dec 18 | 28°F | 10°F | 47°F 1997 | -23°F 2019 | 31% | 26% |
| Dec 19 | 28°F | 9°F | 44°F 2006 | -17°F 2004 | 31% | 27% |
| Dec 20 | 27°F | 9°F | 46°F 2006 | -17°F 1996 | 31% | 27% |
| Dec 21 | 27°F | 9°F | 39°F 2003 | -20°F 1999 | 31% | 27% |
| Dec 22 | 27°F | 8°F | 41°F 2019 | -24°F 1999 | 31% | 27% |
| Dec 23 | 27°F | 8°F | 43°F 2023 | -23°F 2004 | 31% | 27% |
| Dec 24 | 26°F | 8°F | 50°F 2023 | -30°F 2004 | 31% | 27% |
| Dec 25 | 26°F | 7°F | 51°F 2023 | -29°F 2000 | 31% | 27% |
| Dec 26 | 26°F | 7°F | 46°F 2011 | -32°F 1996 | 31% | 27% |
| Dec 27 | 26°F | 7°F | 43°F 2008 | -25°F 2017 | 31% | 28% |
| Dec 28 | 26°F | 6°F | 42°F 2003 | -17°F 2000 | 31% | 28% |
| Dec 29 | 25°F | 6°F | 47°F 1999 | -25°F 2013 | 31% | 28% |
| Dec 30 | 25°F | 6°F | 47°F 2004 | -28°F 2013 | 31% | 28% |
| Dec 31 | 25°F | 6°F | 44°F 2004 | -26°F 2013 | 30% | 28% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CST).
- December 1
- sunrise 7:28 AM, sunset 4:22 PM
- December 31
- sunrise 7:48 AM, sunset 4:30 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00473511 (Hayward RS), public domain. Records: NOAA GHCN-Daily, station USW00094973, 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.