Pasadena, CA weather in January
Pasadena is mild in January, with some rain: highs average 68°F and nights drop to about 46°F. There are about 7 days with rain. It is one of the coolest months in Pasadena. A good month for most outdoor plans.
- Normal high
- 68°F
- Normal low
- 46°F
- Wet days
- 7
- 4.5 in total
- Muggy days
- 0
- dew point 65°F+
How January changes from start to finish
| January 1 | January 31 | |
|---|---|---|
| Normal high | 67°F | 69°F |
| Normal low | 45°F | 46°F |
| Chance of a wet day | 23% | 23% |
| Sunrise / sunset | 6:58 am / 4:53 pm | 6:50 am / 5:21 pm |
| Daylight | 9.9 h | 10.5 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 am48°Fdew point 35°F
- 9 am54°Fdew point 36°F
- Noon64°Fdew point 34°F
- 3 pm66°Fdew point 35°F
- 6 pm60°Fdew point 38°F
- 9 pm55°Fdew point 38°F
NOAA hourly normals (local standard time) from Burbank Glendale Pasadena Airport (13 mi away); average wind 4 mph; clear or few clouds in 74% of daytime hours, mostly cloudy or overcast in 23%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F17 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 below0 of 31
Average days per January, counted from daily records for each year 1991-2020.
Rain in January
Normal precipitation is 4.5 in; a dry January brings about 1.0 in and a wet one about 6.3 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 2 an inch or more.
How January varies from year to year
- Warmest January, 1991-20202014: average high 77°F
- Coolest January2017: average high 61°F
- Wettest January1995: 18.5 in
- Driest January2003: no measurable precipitation
- Highest reading91°F (January 31, 2003)
- Lowest reading31°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 | 67°F | 68°F | 69°F |
| Normal low | 45°F | 46°F | 46°F |
| Wet days | 6 | 7 | 8 |
| Comfortable days | 17 | 17 | 15 |
| Daylight | 9.9 h | 10.2 h | 11.0 h |
Highs change by +1°F from December and +1°F into February.
Nearby alternatives in January
- Drier: Palm Springs, CA94 mi · high 71°F · 3 wet days
- Cooler: Palmdale, CA30 mi · high 60°F · 5 wet days
How Pasadena ranks in January
- Normal high39th warmest of 378 cities; 11th of 60 in California
- Wet days112th driest of 378
- Comfortable days21st most of 339
Heating and cooling
January has 261 heating degree days and 7 cooling degree days (base 65°F), 9% of the year's total heating and cooling demand.
Questions
How cold is Pasadena in January?
The normal high is 68°F and the normal low is 46°F. From 1991 to 2020 the coldest January reading was 31°F (January 14, 2007).
Does it rain a lot in Pasadena in January?
About 7 days in January have at least 0.01 in of precipitation, and the normal total is 4.5 in. The wettest January in 1991-2020 was in 1995 (18.5 in); the driest was in 2003, with no measurable precipitation.
Is January a good time to visit Pasadena?
January ranks 6th of 12 months on our comfort score for Pasadena (66 out of 100). It has about 17 comfortable days. The best month is May.
Where the numbers come from
- Temperature, rain and frost dates: Pasadena (USC00046719), 0.0 mi NNW of the city center, 864 ft . NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: U C L A (USC00049152), 18 mi WSW of the city center, 430 ft (433 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Burbank Glendale Pasadena Airport (USW00023152), 13 mi WNW of the city center, 741 ft (122 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Burbank-Glendale-Pasa Arpt (722880-23152), 13 mi WNW of the city center, 731 ft (132 ft lower than the city). Hourly observations, 1991-2020.