Hayward, CA weather in January
In January, Hayward sees highs around 58°F and lows around 45°F: cool, with frequent rain. There are about 11 days with rain. It is one of the coolest months in Hayward.
- Normal high
- 58°F
- Normal low
- 45°F
- Wet days
- 11
- 4.6 in total
- Muggy days
- 0
- dew point 65°F+
How January changes from start to finish
| January 1 | January 31 | |
|---|---|---|
| Normal high | 57°F | 59°F |
| Normal low | 44°F | 45°F |
| Chance of a wet day | 36% | 36% |
| Sunrise / sunset | 7:23 am / 5:00 pm | 7:12 am / 5:30 pm |
| Daylight | 9.6 h | 10.3 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical January day
- 6 am46°Fdew point 42°F
- 9 am49°Fdew point 43°F
- Noon54°Fdew point 44°F
- 3 pm56°Fdew point 44°F
- 6 pm53°Fdew point 44°F
- 9 pm50°Fdew point 44°F
NOAA hourly normals (local standard time) from Oakland Metro Intl Airport (9 mi away); average wind 7 mph; clear or few clouds in 29% of daytime hours, mostly cloudy or overcast in 57%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F2 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow11 of 31
- Notable rainat least 0.10 in7 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per January, counted from daily records for each year 1991-2020.
Rain in January
Normal precipitation is 4.6 in; a dry January brings about 1.5 in and a wet one about 7.7 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 2 an inch or more. Snow is very rare.
How January varies from year to year
- Warmest January, 1991-20202014: average high 64°F
- Coolest January2008: average high 54°F
- Wettest January1998: 12.2 in
- Driest January2015: no measurable precipitation
- Highest reading74°F (January 31, 2015)
- Lowest reading32°F (January 14, 2007)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
January compared with December and February
| December | January | February | |
|---|---|---|---|
| Normal high | 58°F | 58°F | 61°F |
| Normal low | 45°F | 45°F | 46°F |
| Wet days | 12 | 11 | 10 |
| Comfortable days | 1 | 2 | 5 |
| Daylight | 9.6 h | 9.9 h | 10.8 h |
Highs change by 0°F from December and +3°F into February.
Nearby alternatives in January
- Warmer: Santa Maria, CA209 mi · high 65°F · 8 wet days
- Drier: Fresno, CA142 mi · high 55°F · 8 wet days
- Cooler: Yosemite Valley, CA137 mi · high 48°F · 9 wet days
How Hayward ranks in January
- Normal high125th warmest of 378 cities; 42nd of 60 in California
- Wet days279th driest of 378
- Comfortable days180th most of 339
What to pack for Hayward in January
- A rain jacket or umbrella – rain on about 11 days
Heating and cooling
January has 426 heating degree days and 0 cooling degree days (base 65°F), 16% of the year's total heating and cooling demand.
Questions
How cold is Hayward in January?
The normal high is 58°F and the normal low is 45°F. From 1991 to 2020 the coldest January reading was 32°F (January 14, 2007).
Does it rain a lot in Hayward in January?
About 11 days in January have at least 0.01 in of precipitation, and the normal total is 4.6 in. The wettest January in 1991-2020 was in 1998 (12.2 in); the driest was in 2015, with no measurable precipitation.
Is January a good time to visit Hayward?
January ranks 11th of 12 months on our comfort score for Hayward (44 out of 100). It has about 2 comfortable days. The best months are July and August.
Where the numbers come from
- Temperature and cloud cover: San Francisco Intl Airport (USW00023234), 16 mi WSW of the city center, 8 ft (98 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Rain: Upper San Leandro Filters (USC00049185), 8.6 mi NNW of the city center, 394 ft (288 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Newark (USC00046144), 11 mi SSE of the city center, 10 ft (96 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: Hayward Air Terminal (USW00093228), 2.1 mi WSW of the city center, 43 ft (63 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Oakland Metro Intl Airport (USW00023230), 8.5 mi WNW of the city center, 6 ft (100 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: San Francisco International Airport (724940-23234), 16 mi WSW of the city center, 10 ft (96 ft lower than the city). Hourly observations, 1991-2020.