Pomona weather in January: Pomona, California: normal highs, lows, rain and records for January
Pomona in January has a normal high of 68°F and a normal low of 43°F, a daily mean of 56°F, holding near 68°F all month. Measurable precipitation falls on 5 days in a normal January, 2.91 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 20°C and low of 6°C, 74 mm of precipitation in January.
- NOAA stationPomona/Fairplex
- Station IDUSC00047050
- Location34.08°N 117.77°W
- Elevation999 ft (305 m)
- From the center2 miles
- Population147,966
- Jan 68° 43°
- Feb 67° 45°
- Mar 72° 47°
- Apr 76° 50°
- May 78° 54°
- Jun 84° 57°
- Jul 90° 62°
- Aug 92° 63°
- Sep 89° 60°
- Oct 81° 54°
- Nov 74° 47°
- Dec 67° 42°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Pomona in January?
The normal high is 68°F and the normal low 43°F, for a daily mean of 55.5°F. January is 1.3°F warmer than December and 0.4°F cooler than February. January is the 11th warmest month of the year in Pomona and the 2nd wettest. Across the month the normal high rises 1°F, from 67°F on January 1 to 68°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 53°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 18%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| January 1 | 67°F | 42°F | 18% | 15% |
| January 8 | 68°F | 43°F | 17% | 14% |
| January 15 | 68°F | 43°F | 16% | 13% |
| January 22 | 68°F | 44°F | 16% | 12% |
| January 31 | 68°F | 44°F | 17% | 12% |
Every day of January: normal high, low and chance of precipitation (warmest afternoon January 16, coldest night January 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| January 1 | 67°F | 42°F | 18% | 15% | 10 h |
| January 2 | 67°F | 42°F | 18% | 15% | 10 h |
| January 3 | 67°F | 42°F | 18% | 15% | 10 h |
| January 4 | 68°F | 42°F | 18% | 15% | 10 h |
| January 5 | 68°F | 42°F | 17% | 15% | 10 h |
| January 6 | 68°F | 43°F | 17% | 15% | 10 h |
| January 7 | 68°F | 43°F | 17% | 14% | 10 h |
| January 8 | 68°F | 43°F | 17% | 14% | 10 h |
| January 9 | 68°F | 43°F | 17% | 14% | 10 h |
| January 10 | 68°F | 43°F | 17% | 14% | 10 h |
| January 11 | 68°F | 43°F | 16% | 14% | 10 h |
| January 12 | 68°F | 43°F | 16% | 13% | 10 h |
| January 13 | 68°F | 43°F | 16% | 13% | 10 h |
| January 14 | 68°F | 43°F | 16% | 13% | 10 h 10 min |
| January 15 | 68°F | 43°F | 16% | 13% | 10 h 10 min |
| January 16 | 68°F | 43°F | 16% | 13% | 10 h 10 min |
| January 17 | 68°F | 43°F | 16% | 13% | 10 h 10 min |
| January 18 | 68°F | 43°F | 16% | 13% | 10 h 10 min |
| January 19 | 68°F | 43°F | 16% | 13% | 10 h 10 min |
| January 20 | 68°F | 44°F | 16% | 13% | 10 h 10 min |
| January 21 | 68°F | 44°F | 16% | 12% | 10 h 10 min |
| January 22 | 68°F | 44°F | 16% | 12% | 10 h 20 min |
| January 23 | 68°F | 44°F | 16% | 12% | 10 h 20 min |
| January 24 | 68°F | 44°F | 16% | 12% | 10 h 20 min |
| January 25 | 68°F | 44°F | 16% | 12% | 10 h 20 min |
| January 26 | 68°F | 44°F | 16% | 12% | 10 h 20 min |
| January 27 | 68°F | 44°F | 17% | 12% | 10 h 20 min |
| January 28 | 68°F | 44°F | 17% | 12% | 10 h 20 min |
| January 29 | 68°F | 44°F | 17% | 12% | 10 h 30 min |
| January 30 | 68°F | 44°F | 17% | 12% | 10 h 30 min |
| January 31 | 68°F | 44°F | 17% | 12% | 10 h 30 min |
- Normal high
- 68°FJanuary average
- Normal low
- 43°FJanuary average
- Precipitation
- 2.91 inmonth total
- Days with precipitation
- 50.01 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
- 13
- Days at 80°F or more
- 3
- Sunshine
- 85%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00047050; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Pomona in January?
On a given January day the chance of 0.01 inch or more is 17% on average, highest around January 1 (18%). In all, 2.91 in falls on 5 days of a normal January, 1 of them with an inch or more.
In a normal January in Pomona, 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00047050.
What are the records for January in Pomona?
The warmest January temperature on this station's record (since 1893) is 91°F, on January 30, 2003; the coldest is 21°F, on January 7, 1913. The wettest January brought 18.74 in (1916).
Source: records: ACIS, station USC00047050. Records and recent months use complete months only.
How does January in Pomona 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; Pomona's is 68°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.