Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
Ukiah marks the start of January with an average high-temperature of a still wintry 38.8°F (3.8°C), hinting at a slight fluctuation from December's 36.7°F (2.6°C). Ukiah encounters a steady low-temperature average of 27.5°F (-2.5°C) throughout the month of January.Humidity
January is the most humid month, with an average relative humidity of 80%.Rainfall
In Ukiah, during January, the rain falls for 15.6 days and regularly aggregates up to 1.85" (47mm) of precipitation. In Ukiah, during the entire year, the rain falls for 145.3 days and collects up to 16.69" (424mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In January, it is snowing for 5.6 days. Throughout January, 2.76" (70mm) of snow is accumulated. Throughout the year, there are 30.7 snowfall days, and 15.51" (394mm) of snow is accumulated.Daylight
In January, the average length of the day is 9h and 14min.On the first day of the month, sunrise is at 7:34 am and sunset at 4:24 pm. On the last day of January, sunrise is at 7:16 am and sunset at 5:01 pm PST.
Sunshine
With an average of 5h of sunshine, January has the least sunshine of the year.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 2 during January translates into the following directions:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January?
What is the most humid month?
What is the average humidity in January?
How many days does it rain in January in Ukiah?
How much does it snow in January?
How many hours of daylight does Ukiah have in January?
When is the sunrise / sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
What are the months with the lowest UV index?
What is the UV index intensity in January in Ukiah?
Average temperature in January
Ukiah, OR
- Average high temperature in January: 38.8°F
The warmest months (with the highest average high temperature) are July and August (81.5°F).
The month with the lowest average high temperature is December (36.7°F).
- Average low temperature in January: 27.5°F
The month with the highest average low temperature is August (59.5°F).
The coldest month (with the lowest average low temperature) is December (25.7°F).
Average pressure in January
Ukiah, OR
- Average pressure in January: 30.2"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in January
Ukiah, OR
- Average wind speed in January: 7.1mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is September (6.2mph).
Average humidity in January
Ukiah, OR
- Average humidity in January: 80%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (41%).
Average rainfall in January
Ukiah, OR
- Average rainfall in January: 1.85"
The wettest month (with the highest rainfall) is March (2.2").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in January
Ukiah, OR
- Average rainfall days in January: 15.6 days
The month with the highest number of rainy days is March (18.4 days).
The month with the least rainy days is August (3.5 days).
Average snowfall in January
Ukiah, OR
- Average snowfall in January: 2.76"
The month with the highest snowfall is February (5.24").
The months with the least snowfall are June, July and August (0").
Average snowfall days in January
Ukiah, OR
- Average snowfall days in January: 5.6 days
The month with the highest number of snowfall days is December (8.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in January /
Average sunshine in January
Ukiah, OR
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January: 5h
The month with the most sunshine is August (Average sunshine: 12h).
The month with the least sunshine is January (Average sunshine: 5h).
Average sunshine days in January
Ukiah, OR
- Average sunshine days in January: 12.2 days
The month with the most sunshine days is August (24.8 days).
The month with the least sunshine days is February (8.7 days).
Average UV index in January
Ukiah, OR
- Average UV index in January: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Ukiah, OR
- Average cloud cover in January: 47
The months with the most cloud cover are January and February (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in January
Ukiah, OR
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Ukiah, Oregon, USA
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