Ukiah weather in January: Ukiah, California: normal highs, lows, rain and records for January
Ukiah in January has a normal high of 58°F and a normal low of 37°F, a daily mean of 48°F, rising from 57°F on the 1st to 59°F by the 31st. Measurable precipitation falls on 14 days in a normal January, 6.70 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 15°C and low of 3°C, 170 mm of precipitation in January.
- NOAA stationUkiah Municipal Airport
- Station IDUSW00023275
- Location39.13°N 123.20°W
- Elevation601 ft (183 m)
- Population16,067
- Jan 58° 37°
- Feb 61° 39°
- Mar 65° 41°
- Apr 69° 43°
- May 78° 48°
- Jun 86° 52°
- Jul 94° 56°
- Aug 94° 55°
- Sep 89° 51°
- Oct 79° 45°
- Nov 65° 40°
- Dec 57° 36°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Ukiah in January?
The normal high is 58°F and the normal low 37°F, for a daily mean of 47.7°F. January is 1.4°F warmer than December and 2.2°F cooler than February. January is the 11th warmest month of the year in Ukiah and the 2nd wettest. Across the month the normal high rises 2°F, from 57°F on January 1 to 59°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 46°F and 50°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 48%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| January 1 | 57°F | 36°F | 48% | 32% |
| January 8 | 58°F | 37°F | 47% | 30% |
| January 15 | 58°F | 37°F | 44% | 28% |
| January 22 | 59°F | 38°F | 42% | 27% |
| January 31 | 59°F | 38°F | 40% | 25% |
Every day of January: normal high, low and chance of precipitation (warmest afternoon January 31, coldest night January 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| January 1 | 57°F | 36°F | 48% | 32% | 9 h 30 min |
| January 2 | 57°F | 36°F | 48% | 32% | 9 h 30 min |
| January 3 | 57°F | 36°F | 48% | 32% | 9 h 30 min |
| January 4 | 57°F | 36°F | 47% | 32% | 9 h 30 min |
| January 5 | 58°F | 36°F | 47% | 31% | 9 h 30 min |
| January 6 | 58°F | 37°F | 47% | 31% | 9 h 30 min |
| January 7 | 58°F | 37°F | 47% | 31% | 9 h 30 min |
| January 8 | 58°F | 37°F | 47% | 30% | 9 h 30 min |
| January 9 | 58°F | 37°F | 46% | 30% | 9 h 30 min |
| January 10 | 58°F | 37°F | 46% | 30% | 9 h 40 min |
| January 11 | 58°F | 37°F | 45% | 29% | 9 h 40 min |
| January 12 | 58°F | 37°F | 45% | 29% | 9 h 40 min |
| January 13 | 58°F | 37°F | 45% | 29% | 9 h 40 min |
| January 14 | 58°F | 37°F | 44% | 28% | 9 h 40 min |
| January 15 | 58°F | 37°F | 44% | 28% | 9 h 40 min |
| January 16 | 58°F | 37°F | 44% | 28% | 9 h 40 min |
| January 17 | 58°F | 37°F | 43% | 27% | 9 h 40 min |
| January 18 | 59°F | 37°F | 43% | 27% | 9 h 50 min |
| January 19 | 59°F | 38°F | 43% | 27% | 9 h 50 min |
| January 20 | 59°F | 38°F | 43% | 27% | 9 h 50 min |
| January 21 | 59°F | 38°F | 42% | 27% | 9 h 50 min |
| January 22 | 59°F | 38°F | 42% | 27% | 9 h 50 min |
| January 23 | 59°F | 38°F | 42% | 26% | 9 h 50 min |
| January 24 | 59°F | 38°F | 42% | 26% | 10 h |
| January 25 | 59°F | 38°F | 42% | 26% | 10 h |
| January 26 | 59°F | 38°F | 41% | 26% | 10 h |
| January 27 | 59°F | 38°F | 41% | 26% | 10 h |
| January 28 | 59°F | 38°F | 41% | 26% | 10 h |
| January 29 | 59°F | 38°F | 41% | 26% | 10 h 10 min |
| January 30 | 59°F | 38°F | 40% | 25% | 10 h 10 min |
| January 31 | 59°F | 38°F | 40% | 25% | 10 h 10 min |
- Normal high
- 58°FJanuary average
- Normal low
- 37°FJanuary average
- Precipitation
- 6.70 inmonth total
- Days with precipitation
- 140.01 inch or more
- Nights at 32°F or colder
- 10
- Daylight
- 9 h 30 min to 10 h 10 minJanuary 1 to January 31
- Days at 70°F or more
- 3
- Sunshine
- 71%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023275; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Ukiah in January?
On a given January day the chance of 0.01 inch or more is 44% on average, highest around January 1 (48%). In all, 6.70 in falls on 14 days of a normal January, 2 of them with an inch or more.
In a normal January in Ukiah, 10 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023275.
How humid and windy is Ukiah in January?
At 3 p.m. the normal temperature is 59°F with 50% relative humidity and a dew point of 41°F; at 6 a.m. it is 41°F with 90% humidity. The wind averages 2.7 mph, most often from the south-southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 41°F | 38°F | 90% | 1.7 mph | – |
| 9 a.m. | 43°F | 40°F | 88% | 1.9 mph | – |
| noon | 53°F | 41°F | 63% | 3.3 mph | – |
| 3 p.m. | 59°F | 41°F | 50% | 5.0 mph | 57% |
| 6 p.m. | 53°F | 42°F | 67% | 3.4 mph | – |
| 9 p.m. | 47°F | 41°F | 80% | 2.0 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00023275. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for January in Ukiah?
The warmest January temperature on Ukiah's official record (since 1893) is 82°F, on January 27, 1984; the coldest is 12°F, on January 12, 1898. The wettest January brought 30.75 in (1909); the snowiest, 5.0 inches (1952).
The January mean against the 1991-2020 normal of 47.7°F: 2021 49.1°F (+1.4), 2022 49.5°F (+1.8), 2023 47.6°F (−0.1), 2024 51.0°F (+3.3), 2025 49.0°F (+1.3), 2026 49.6°F (+1.9). 5 of 6 ran warmer than normal.
| January | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 49.1°F | +1.4°F | 3.97 in |
| 2022 | 49.5°F | +1.8°F | 0.53 in |
| 2023 | 47.6°F | −0.1°F | 13.14 in |
| 2024 | 51.0°F | +3.3°F | 9.05 in |
| 2025 | 49.0°F | +1.3°F | 1.10 in |
| 2026 | 49.6°F | +1.9°F | 4.61 in |
Source: records: ACIS, NWS threaded record UKIthr; recent months: ACIS, station USW00023275. Records and recent months use complete months only.
How does January in Ukiah 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; Ukiah's is 58°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.