San Jacinto weather in January: San Jacinto, California: normal highs, lows, rain and records for January
San Jacinto in January has a normal high of 66°F and a normal low of 40°F, a daily mean of 53°F, holding near 66°F all month. Measurable precipitation falls on 6 days in a normal January, 2.66 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 19°C and low of 5°C, 68 mm of precipitation in January.
- NOAA stationSan Jacinto
- Station IDUSC00047813
- Location33.80°N 116.98°W
- Elevation1,525 ft (465 m)
- From the center1 miles
- Population55,515
- Jan 66° 40°
- Feb 66° 42°
- Mar 70° 45°
- Apr 74° 48°
- May 80° 53°
- Jun 89° 58°
- Jul 95° 64°
- Aug 97° 64°
- Sep 92° 61°
- Oct 82° 53°
- Nov 73° 44°
- Dec 65° 39°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is San Jacinto in January?
The normal high is 66°F and the normal low 40°F, for a daily mean of 52.9°F. January is 0.9°F warmer than December and 0.8°F cooler than February. January is the 11th warmest month of the year in San Jacinto and the 2nd wettest. Across the month the normal high rises 1°F, from 65°F on January 1 to 66°F on January 31. From one year to the next January's mean temperature typically moves about 2.6°F either way (NOAA's standard deviation), so roughly two Januarys in three average between 50°F and 56°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 20%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| January 1 | 65°F | 39°F | 18% | 12% |
| January 8 | 66°F | 40°F | 19% | 13% |
| January 15 | 66°F | 40°F | 19% | 13% |
| January 22 | 66°F | 40°F | 20% | 13% |
| January 31 | 66°F | 41°F | 20% | 14% |
Every day of January: normal high, low and chance of precipitation (warmest afternoon January 15, coldest night January 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| January 1 | 65°F | 39°F | 18% | 12% | 10 h |
| January 2 | 65°F | 39°F | 19% | 13% | 10 h |
| January 3 | 65°F | 39°F | 19% | 13% | 10 h |
| January 4 | 65°F | 39°F | 19% | 13% | 10 h |
| January 5 | 66°F | 40°F | 19% | 13% | 10 h |
| January 6 | 66°F | 40°F | 19% | 13% | 10 h |
| January 7 | 66°F | 40°F | 19% | 13% | 10 h |
| January 8 | 66°F | 40°F | 19% | 13% | 10 h |
| January 9 | 66°F | 40°F | 19% | 13% | 10 h |
| January 10 | 66°F | 40°F | 19% | 13% | 10 h |
| January 11 | 66°F | 40°F | 19% | 13% | 10 h |
| January 12 | 66°F | 40°F | 19% | 13% | 10 h |
| January 13 | 66°F | 40°F | 19% | 13% | 10 h 10 min |
| January 14 | 66°F | 40°F | 19% | 13% | 10 h 10 min |
| January 15 | 66°F | 40°F | 19% | 13% | 10 h 10 min |
| January 16 | 66°F | 40°F | 19% | 13% | 10 h 10 min |
| January 17 | 66°F | 40°F | 19% | 13% | 10 h 10 min |
| January 18 | 66°F | 40°F | 20% | 13% | 10 h 10 min |
| January 19 | 66°F | 40°F | 20% | 13% | 10 h 10 min |
| January 20 | 66°F | 40°F | 20% | 13% | 10 h 10 min |
| January 21 | 66°F | 40°F | 20% | 13% | 10 h 20 min |
| January 22 | 66°F | 40°F | 20% | 13% | 10 h 20 min |
| January 23 | 66°F | 40°F | 20% | 13% | 10 h 20 min |
| January 24 | 66°F | 41°F | 20% | 13% | 10 h 20 min |
| January 25 | 66°F | 41°F | 20% | 13% | 10 h 20 min |
| January 26 | 66°F | 41°F | 20% | 13% | 10 h 20 min |
| January 27 | 66°F | 41°F | 20% | 13% | 10 h 20 min |
| January 28 | 66°F | 41°F | 20% | 13% | 10 h 30 min |
| January 29 | 66°F | 41°F | 20% | 13% | 10 h 30 min |
| January 30 | 66°F | 41°F | 20% | 13% | 10 h 30 min |
| January 31 | 66°F | 41°F | 20% | 14% | 10 h 30 min |
- Normal high
- 66°FJanuary average
- Normal low
- 40°FJanuary average
- Precipitation
- 2.66 inmonth total
- Days with precipitation
- 60.01 inch or more
- Nights at 32°F or colder
- 4
- Daylight
- 10 h to 10 h 30 minJanuary 1 to January 31
- Days at 70°F or more
- 14
- Days at 80°F or more
- 3
- Sunshine
- 85%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00047813; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in San Jacinto in January?
On a given January day the chance of 0.01 inch or more is 19% on average, highest around January 30 (20%). In all, 2.66 in falls on 6 days of a normal January, 1 of them with an inch or more.
In a normal January in San Jacinto, 4 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00047813.
What are the records for January in San Jacinto?
The January mean against the 1991-2020 normal of 52.9°F: 2021 54.2°F (+1.3), 2022 55.6°F (+2.7), 2023 50.7°F (−2.2), 2024 53.1°F (+0.3), 2025 53.0°F (+0.1), 2026 57.7°F (+4.8). 5 of 6 ran warmer than normal.
| January | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 54.2°F | +1.3°F | 2.10 in |
| 2022 | 55.6°F | +2.7°F | 0.00 in |
| 2023 | 50.7°F | −2.2°F | 5.13 in |
| 2024 | 53.1°F | +0.3°F | 2.23 in |
| 2025 | 53.0°F | +0.1°F | 0.54 in |
| 2026 | 57.7°F | +4.8°F | 0.99 in |
Source: recent months: ACIS, station USC00047813. Records and recent months use complete months only.
How does January in San Jacinto 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; San Jacinto's is 66°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- San Jacinto in December65°F by day, 39°F at night
- San Jacinto in February66°F by day, 42°F at night
- San Jacinto through the yearEvery month, frost dates, records and recent years
- California in JanuaryThe statewide normal and the warmest and coolest places
- Brawley: California's warmest Januarynormal high 72°F