Vallejo weather in January: Vallejo, California: normal highs, lows, rain and records for January
Vallejo in January has a normal high of 57°F and a normal low of 42°F, a daily mean of 50°F, rising from 57°F on the 1st to 59°F by the 31st. The month brings 4.46 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 14°C and low of 6°C, 113 mm of precipitation in January.
- NOAA stationVallejo
- Station IDUSC00049219
- Location38.10°N 122.19°W
- Elevation341 ft (104 m)
- From the center4 miles
- Population123,475
- Jan 57° 42°
- Feb 63° 45°
- Mar 68° 46°
- Apr 73° 47°
- May 78° 51°
- Jun 83° 54°
- Jul 85° 56°
- Aug 86° 56°
- Sep 86° 57°
- Oct 79° 54°
- Nov 66° 47°
- Dec 58° 42°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Vallejo in January?
The normal high is 57°F and the normal low 42°F, for a daily mean of 49.7°F. January is 0.1°F cooler than December and 4.4°F cooler than February. January is the 12th warmest month of the year in Vallejo and the 2nd wettest. Across the month the normal high rises 2°F, from 57°F on January 1 to 59°F on January 31.
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| January 1 | 57°F | 41°F | – | – |
| January 8 | 57°F | 41°F | – | – |
| January 15 | 57°F | 42°F | – | – |
| January 22 | 58°F | 43°F | – | – |
| January 31 | 59°F | 44°F | – | – |
Every day of January: normal high, low and chance of precipitation (warmest afternoon January 31, coldest night January 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| January 1 | 57°F | 41°F | – | – | 9 h 30 min |
| January 2 | 57°F | 41°F | – | – | 9 h 30 min |
| January 3 | 57°F | 41°F | – | – | 9 h 40 min |
| January 4 | 57°F | 41°F | – | – | 9 h 40 min |
| January 5 | 57°F | 41°F | – | – | 9 h 40 min |
| January 6 | 57°F | 41°F | – | – | 9 h 40 min |
| January 7 | 57°F | 41°F | – | – | 9 h 40 min |
| January 8 | 57°F | 41°F | – | – | 9 h 40 min |
| January 9 | 57°F | 41°F | – | – | 9 h 40 min |
| January 10 | 57°F | 41°F | – | – | 9 h 40 min |
| January 11 | 57°F | 41°F | – | – | 9 h 40 min |
| January 12 | 57°F | 41°F | – | – | 9 h 40 min |
| January 13 | 57°F | 42°F | – | – | 9 h 40 min |
| January 14 | 57°F | 42°F | – | – | 9 h 50 min |
| January 15 | 57°F | 42°F | – | – | 9 h 50 min |
| January 16 | 57°F | 42°F | – | – | 9 h 50 min |
| January 17 | 57°F | 42°F | – | – | 9 h 50 min |
| January 18 | 57°F | 42°F | – | – | 9 h 50 min |
| January 19 | 57°F | 42°F | – | – | 9 h 50 min |
| January 20 | 57°F | 42°F | – | – | 9 h 50 min |
| January 21 | 58°F | 42°F | – | – | 10 h |
| January 22 | 58°F | 43°F | – | – | 10 h |
| January 23 | 58°F | 43°F | – | – | 10 h |
| January 24 | 58°F | 43°F | – | – | 10 h |
| January 25 | 58°F | 43°F | – | – | 10 h |
| January 26 | 58°F | 43°F | – | – | 10 h |
| January 27 | 59°F | 43°F | – | – | 10 h 10 min |
| January 28 | 59°F | 43°F | – | – | 10 h 10 min |
| January 29 | 59°F | 44°F | – | – | 10 h 10 min |
| January 30 | 59°F | 44°F | – | – | 10 h 10 min |
| January 31 | 59°F | 44°F | – | – | 10 h 10 min |
- Normal high
- 57°FJanuary average
- Normal low
- 42°FJanuary average
- Precipitation
- 4.46 inmonth total
- Nights at 32°F or colder
- 2
- Daylight
- 9 h 30 min to 10 h 10 minJanuary 1 to January 31
- Sunshine
- 74%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00049219; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Vallejo in January?
In a normal January in Vallejo, 2 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00049219.
What are the records for January in Vallejo?
The January mean against the 1991-2020 normal of 49.7°F: 2021 52.9°F (+3.2), 2022 52.0°F (+2.3), 2023 50.0°F (+0.3), 2024 53.4°F (+3.7), 2025 52.9°F (+3.2). 5 of 5 ran warmer than normal.
| January | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 52.9°F | +3.2°F | 3.18 in |
| 2022 | 52.0°F | +2.3°F | 0.39 in |
| 2023 | 50.0°F | +0.3°F | 8.23 in |
| 2024 | 53.4°F | +3.7°F | 2.60 in |
| 2025 | 52.9°F | +3.2°F | 0.67 in |
Source: recent months: ACIS, station USC00049219. Records and recent months use complete months only.
How does January in Vallejo compare across California?
Across the 219 places PlainClimate covers in California, January normal highs run from 37°F in Tahoma to 72°F in Brawley; Vallejo's is 57°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.