El Cajon, CA weather in January
January in El Cajon: mild, with some rain. Highs 69°F, lows 43°F, about 7 wet days. A good month for most outdoor plans.
- Normal high
- 69°F
- Normal low
- 43°F
- Wet days
- 7
- 2.9 in total
- Muggy days
- 0
- dew point 65°F+
How January changes from start to finish
| January 1 | January 31 | |
|---|---|---|
| Normal high | 68°F | 70°F |
| Normal low | 42°F | 43°F |
| Chance of a wet day | 23% | 23% |
| Sunrise / sunset | 6:50 am / 4:52 pm | 6:43 am / 5:19 pm |
| Daylight | 10.0 h | 10.6 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 am52°Fdew point 42°F
- 9 am57°Fdew point 42°F
- Noon64°Fdew point 43°F
- 3 pm64°Fdew point 45°F
- 6 pm60°Fdew point 47°F
- 9 pm57°Fdew point 47°F
NOAA hourly normals (local standard time) from San Diego Lindbergh Fld (14 mi away); average wind 5 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F19 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 snow7 of 31
- Notable rainat least 0.10 in5 of 31
- Freezing nightslow 32°F or below1 of 31
Average days per January, counted from daily records for each year 1991-2020.
Rain in January
Normal precipitation is 2.9 in; a dry January brings about 0.8 in and a wet one about 4.6 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more. Snow is very rare.
How January varies from year to year
- Warmest January, 1991-20202003: average high 79°F
- Coolest January1995: average high 64°F
- Wettest January1993: 14.2 in
- Driest January2003: 0.09 in
- Highest reading92°F (January 31, 2003)
- Lowest reading26°F (January 15, 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 | 69°F | 69°F | 69°F |
| Normal low | 42°F | 43°F | 44°F |
| Wet days | 6 | 7 | 8 |
| Comfortable days | 19 | 19 | 16 |
| Daylight | 10.0 h | 10.3 h | 11.0 h |
Highs change by 0°F from December and 0°F into February.
Nearby alternatives in January
- Drier: Palm Springs, CA75 mi · high 71°F · 3 wet days
- Cooler: Oceanside, CA37 mi · high 63°F · 6 wet days
How El Cajon ranks in January
- Normal high31st warmest of 378 cities; 6th of 60 in California
- Wet days103rd driest of 378
- Comfortable days15th most of 339
What to pack for El Cajon in January
- Layers – afternoons near 69°F but nights near 43°F
Frost in January
The last spring frost typically comes around Jan 6; in 1 year in 10 it comes after Feb 7. All frost dates for El Cajon.
Heating and cooling
January has 283 heating degree days and 1 cooling degree days (base 65°F), 11% of the year's total heating and cooling demand.
Questions
How cold is El Cajon in January?
The normal high is 69°F and the normal low is 43°F. From 1991 to 2020 the coldest January reading was 26°F (most recently on January 15, 2007).
Does it rain a lot in El Cajon in January?
About 7 days in January have at least 0.01 in of precipitation, and the normal total is 2.9 in. The wettest January in 1991-2020 was in 1993 (14.2 in); the driest was in 2003 (0.09 in).
Is January a good time to visit El Cajon?
January ranks 6th of 12 months on our comfort score for El Cajon (69 out of 100). It has about 19 comfortable days. The best month is May.
Where the numbers come from
- Temperature and frost dates: El Cajon (USC00042706), 2.0 mi ENE of the city center, 495 ft (60 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Rain, snowfall and snow depth: Lakeside 2 E (USC00044710), 5.7 mi NE of the city center, 690 ft (255 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: San Diego Lindbergh Fld (USW00023188), 14 mi WSW of the city center, 15 ft (420 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: San Diego International Airport (722900-23188), 14 mi WSW of the city center, 15 ft (420 ft lower than the city). Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).