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 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
January's beginning in Pomona signals an average high-temperature of a still comfortable 65.5°F (18.6°C), barely different from December's 63.1°F (17.3°C). The low-temperature averages to a frosty 47.8°F (8.8°C) during the nights of January.Humidity
In January, the average relative humidity is 49%.Rainfall
In Pomona, in January, during 5.3 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. In Pomona, during the entire year, the rain falls for 48 days and collects up to 7.52" (191mm) of precipitation.Snowfall
In Pomona, snow does not fall in January, March through December.Daylight
In Pomona, the average length of the day in January is 10h and 11min.On the first day of the month, sunrise is at 6:56 am and sunset at 4:52 pm. On the last day of January, sunrise is at 6:48 am and sunset at 5:20 pm PST.
Sunshine
The average sunshine in January in Pomona, California, is 7h.UV index
The months with the lowest UV index in Pomona are January, February, November and December, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In January, an average UV index of 4 transforms into the following instructions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Pomona in January?
What is the average humidity in January in Pomona?
How many days does it rain in January in Pomona?
When it does not snow in Pomona?
Does it snow in Pomona in January?
How many hours of daylight does Pomona have in January?
When is the sunrise / sunset in January in Pomona?
How many hours of sunshine does Pomona have in January?
When is the lowest UV index in Pomona?
What is the UV index intensity in January in Pomona?
Average temperature in January
Pomona, CA
- Average high temperature in January: 65.5°F
The warmest month (with the highest average high temperature) is August (90.1°F).
The month with the lowest average high temperature is December (63.1°F).
- Average low temperature in January: 47.8°F
The month with the highest average low temperature is August (65.7°F).
The coldest months (with the lowest average low temperature) are February and December (46.8°F).
Average pressure in January
Pomona, CA
- Average pressure in January: 30.1"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in January
Pomona, CA
- Average wind speed in January: 5.2mph
The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).
Average humidity in January
Pomona, CA
- Average humidity in January: 49%
The month with the highest relative humidity is May (56%).
The months with the lowest relative humidity are August and November (45%).
Average rainfall in January
Pomona, CA
- Average rainfall in January: 1.22"
The wettest months (with the highest rainfall) are February and December (1.65").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in January
Pomona, CA
- Average rainfall days in January: 5.3 days
The month with the highest number of rainy days is March (7.6 days).
The month with the least rainy days is June (0.8 days).
Average snowfall days in January
Pomona, CA
- Average snowfall days in January: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in January /
Average sunshine in January
Pomona, CA
- Average daylight in January: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in January: 7h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).
Average sunshine days in January
Pomona, CA
- Average sunshine days in January: 24.7 days
The month with the most sunshine days is June (28.7 days).
The month with the least sunshine days is February (21.1 days).
Average UV index in January
Pomona, CA
- Average UV index in January: 4
The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in January
Pomona, CA
- Average cloud cover in January: 20
The months with the most cloud cover are February, March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in January
Pomona, CA
- 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).
Pomona, California, USA
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