Hayward weather in December: Hayward, California: normal highs, lows, rain and records for December
Hayward in December has a normal high of 59°F and a normal low of 43°F, a daily mean of 51°F, falling from 61°F on the 1st to 59°F by the 31st. Measurable precipitation falls on 10 days in a normal December, 3.20 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 15°C and low of 6°C, 81 mm of precipitation in December.
- NOAA stationHayward Air Terminal
- Station IDUSW00093228
- Location37.65°N 122.11°W
- Elevation43 ft (13 m)
- From the center2 miles
- Population158,440
- Jan 59° 43°
- Feb 62° 45°
- Mar 64° 47°
- Apr 67° 50°
- May 69° 52°
- Jun 74° 55°
- Jul 75° 57°
- Aug 76° 58°
- Sep 77° 58°
- Oct 74° 54°
- Nov 65° 47°
- Dec 59° 43°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Hayward in December?
The normal high is 59°F and the normal low 43°F, for a daily mean of 51.2°F. December is 5.0°F cooler than November and 0.0°F cooler than January. December is the 11th warmest month of the year in Hayward and the wettest. Across the month the normal high falls 2°F, from 61°F on December 1 to 59°F on December 31. From one year to the next December's mean temperature typically moves about 1.9°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 49°F and 53°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 32%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 61°F | 44°F | 29% | 18% |
| December 8 | 60°F | 43°F | 31% | 20% |
| December 15 | 59°F | 43°F | 32% | 20% |
| December 22 | 59°F | 42°F | 32% | 19% |
| December 31 | 59°F | 42°F | 32% | 18% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 22)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 61°F | 44°F | 29% | 18% | 9 h 50 min |
| December 2 | 61°F | 44°F | 29% | 18% | 9 h 50 min |
| December 3 | 61°F | 44°F | 30% | 19% | 9 h 40 min |
| December 4 | 60°F | 44°F | 30% | 19% | 9 h 40 min |
| December 5 | 60°F | 44°F | 30% | 19% | 9 h 40 min |
| December 6 | 60°F | 44°F | 30% | 19% | 9 h 40 min |
| December 7 | 60°F | 43°F | 30% | 19% | 9 h 40 min |
| December 8 | 60°F | 43°F | 31% | 20% | 9 h 40 min |
| December 9 | 60°F | 43°F | 31% | 20% | 9 h 40 min |
| December 10 | 60°F | 43°F | 31% | 20% | 9 h 40 min |
| December 11 | 60°F | 43°F | 31% | 20% | 9 h 40 min |
| December 12 | 59°F | 43°F | 32% | 20% | 9 h 40 min |
| December 13 | 59°F | 43°F | 32% | 20% | 9 h 40 min |
| December 14 | 59°F | 43°F | 32% | 20% | 9 h 40 min |
| December 15 | 59°F | 43°F | 32% | 20% | 9 h 40 min |
| December 16 | 59°F | 43°F | 32% | 20% | 9 h 30 min |
| December 17 | 59°F | 43°F | 32% | 20% | 9 h 30 min |
| December 18 | 59°F | 43°F | 32% | 20% | 9 h 30 min |
| December 19 | 59°F | 43°F | 32% | 20% | 9 h 30 min |
| December 20 | 59°F | 43°F | 32% | 20% | 9 h 30 min |
| December 21 | 59°F | 43°F | 32% | 19% | 9 h 30 min |
| December 22 | 59°F | 42°F | 32% | 19% | 9 h 30 min |
| December 23 | 59°F | 42°F | 32% | 19% | 9 h 30 min |
| December 24 | 59°F | 42°F | 32% | 19% | 9 h 30 min |
| December 25 | 59°F | 42°F | 32% | 19% | 9 h 30 min |
| December 26 | 59°F | 42°F | 32% | 19% | 9 h 30 min |
| December 27 | 59°F | 42°F | 32% | 19% | 9 h 30 min |
| December 28 | 59°F | 42°F | 32% | 18% | 9 h 30 min |
| December 29 | 59°F | 42°F | 32% | 18% | 9 h 30 min |
| December 30 | 59°F | 42°F | 32% | 18% | 9 h 40 min |
| December 31 | 59°F | 42°F | 32% | 18% | 9 h 40 min |
- Normal high
- 59°FDecember average
- Normal low
- 43°FDecember average
- Precipitation
- 3.20 inmonth total
- Days with precipitation
- 100.01 inch or more
- Nights at 32°F or colder
- 1
- Daylight
- 9 h 50 min to 9 h 40 minDecember 1 to December 31
- Days at 70°F or more
- 1
- Sunshine
- 74%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093228; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Hayward in December?
On a given December day the chance of 0.01 inch or more is 31% on average, highest around December 19 (32%). In all, 3.20 in falls on 10 days of a normal December, 1 of them with an inch or more.
In a normal December in Hayward, 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093228.
What are the records for December in Hayward?
The warmest December temperature on this station's record (since 1998) is 76°F, on December 7, 2020; the coldest is 27°F, on December 23, 1998. The wettest December brought 10.53 in (2022).
The December mean against the 1991-2020 normal of 51.2°F: 2021 50.3°F (−0.9), 2022 49.8°F (−1.4), 2023 54.6°F (+3.4), 2024 55.0°F (+3.8), 2025 51.9°F (+0.7). 3 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 50.3°F | −0.9°F | 6.16 in |
| 2022 | 49.8°F | −1.4°F | 10.53 in |
| 2023 | 54.6°F | +3.4°F | 3.72 in |
| 2024 | 55.0°F | +3.8°F | 4.88 in |
| 2025 | 51.9°F | +0.7°F | 3.50 in |
Source: records: ACIS, station USW00093228; recent months: ACIS, station USW00093228. Records and recent months use complete months only.
How does December in Hayward compare across California?
Across the 219 places PlainClimate covers in California, December normal highs run from 38°F in Tahoma to 71°F in Anaheim; Hayward's is 59°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.