El Cajon weather in January: El Cajon, California: normal highs, lows, rain and records for January
El Cajon in January has a normal high of 69°F and a normal low of 43°F, a daily mean of 56°F, holding near 69°F all month. Measurable precipitation falls on 6 days in a normal January, 2.32 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 21°C and low of 6°C, 59 mm of precipitation in January.
- NOAA stationEl Cajon
- Station IDUSC00042706
- Location32.80°N 116.93°W
- Elevation495 ft (151 m)
- From the center2 miles
- Population103,291
- Jan 69° 43°
- Feb 69° 44°
- Mar 71° 48°
- Apr 75° 51°
- May 76° 56°
- Jun 81° 59°
- Jul 86° 63°
- Aug 89° 65°
- Sep 87° 62°
- Oct 81° 56°
- Nov 75° 47°
- Dec 69° 42°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is El Cajon in January?
The normal high is 69°F and the normal low 43°F, for a daily mean of 55.9°F. January is 0.8°F warmer than December and 0.9°F cooler than February. January is the 11th warmest month of the year in El Cajon and the 2nd wettest. Across the month the normal high rises 2°F, from 68°F on January 1 to 70°F on January 31. From one year to the next January's mean temperature typically moves about 2.2°F either way (NOAA's standard deviation), so roughly two Januarys in three average between 54°F and 58°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 19%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| January 1 | 68°F | 42°F | 18% | 14% |
| January 8 | 69°F | 42°F | 18% | 14% |
| January 15 | 70°F | 43°F | 18% | 13% |
| January 22 | 70°F | 43°F | 18% | 13% |
| January 31 | 70°F | 43°F | 19% | 13% |
Every day of January: normal high, low and chance of precipitation (warmest afternoon January 19, coldest night January 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| January 1 | 68°F | 42°F | 18% | 14% | 10 h |
| January 2 | 68°F | 42°F | 18% | 14% | 10 h |
| January 3 | 69°F | 42°F | 18% | 14% | 10 h |
| January 4 | 69°F | 42°F | 18% | 14% | 10 h |
| January 5 | 69°F | 42°F | 18% | 14% | 10 h |
| January 6 | 69°F | 42°F | 18% | 14% | 10 h |
| January 7 | 69°F | 42°F | 18% | 14% | 10 h 10 min |
| January 8 | 69°F | 42°F | 18% | 14% | 10 h 10 min |
| January 9 | 69°F | 42°F | 18% | 13% | 10 h 10 min |
| January 10 | 69°F | 42°F | 18% | 13% | 10 h 10 min |
| January 11 | 69°F | 42°F | 18% | 13% | 10 h 10 min |
| January 12 | 69°F | 42°F | 18% | 13% | 10 h 10 min |
| January 13 | 69°F | 42°F | 18% | 13% | 10 h 10 min |
| January 14 | 69°F | 43°F | 18% | 13% | 10 h 10 min |
| January 15 | 70°F | 43°F | 18% | 13% | 10 h 10 min |
| January 16 | 70°F | 43°F | 18% | 13% | 10 h 10 min |
| January 17 | 70°F | 43°F | 18% | 13% | 10 h 10 min |
| January 18 | 70°F | 43°F | 18% | 13% | 10 h 20 min |
| January 19 | 70°F | 43°F | 18% | 13% | 10 h 20 min |
| January 20 | 70°F | 43°F | 18% | 13% | 10 h 20 min |
| January 21 | 70°F | 43°F | 18% | 13% | 10 h 20 min |
| January 22 | 70°F | 43°F | 18% | 13% | 10 h 20 min |
| January 23 | 70°F | 43°F | 18% | 13% | 10 h 20 min |
| January 24 | 70°F | 43°F | 18% | 13% | 10 h 20 min |
| January 25 | 70°F | 43°F | 18% | 13% | 10 h 30 min |
| January 26 | 70°F | 43°F | 19% | 13% | 10 h 30 min |
| January 27 | 70°F | 43°F | 19% | 13% | 10 h 30 min |
| January 28 | 70°F | 43°F | 19% | 13% | 10 h 30 min |
| January 29 | 70°F | 43°F | 19% | 13% | 10 h 30 min |
| January 30 | 70°F | 43°F | 19% | 13% | 10 h 30 min |
| January 31 | 70°F | 43°F | 19% | 13% | 10 h 30 min |
- Normal high
- 69°FJanuary average
- Normal low
- 43°FJanuary average
- Precipitation
- 2.32 inmonth total
- Days with precipitation
- 60.01 inch or more
- Nights at 32°F or colder
- 1
- Daylight
- 10 h to 10 h 30 minJanuary 1 to January 31
- Days at 70°F or more
- 15
- Days at 80°F or more
- 5
- Sunshine
- 85%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00042706; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in El Cajon in January?
On a given January day the chance of 0.01 inch or more is 18% on average, highest around January 31 (19%). In all, 2.32 in falls on 6 days of a normal January, 1 of them with an inch or more.
In a normal January in El Cajon, 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00042706.
What are the records for January in El Cajon?
The warmest January temperature on El Cajon's official record (since 1899) is 93°F, on January 9, 1923; the coldest is 19°F, on January 8, 1913. The wettest January brought 16.68 in (1916).
The January mean against the 1991-2020 normal of 55.9°F: 2021 56.3°F (+0.4), 2022 56.1°F (+0.2), 2023 53.4°F (−2.5), 2024 55.2°F (−0.7), 2025 53.6°F (−2.3), 2026 59.0°F (+3.1). 3 of 6 ran warmer than normal.
| January | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 56.3°F | +0.4°F | 2.61 in |
| 2022 | 56.1°F | +0.2°F | 0.17 in |
| 2023 | 53.4°F | −2.5°F | 6.90 in |
| 2024 | 55.2°F | −0.7°F | 4.43 in |
| 2025 | 53.6°F | −2.3°F | 0.52 in |
| 2026 | 59.0°F | +3.1°F | 3.63 in |
Source: records: ACIS, NWS threaded record ELJC1thr; recent months: ACIS, station USC00042706. Records and recent months use complete months only.
How does January in El Cajon 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; El Cajon's is 69°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.