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
Acton commences January with an average high-temperature of a still refreshing 57.9°F (14.4°C), maintaining a close resemblance to the previous month. During January, the nighttime temperature averages to an icy 40.6°F (4.8°C).Humidity
In January, the average relative humidity is 52%.Rainfall
In Acton, in January, it is raining for 5.6 days, with typically 1.14" (29mm) of accumulated precipitation. Throughout the year, in Acton, there are 51.4 rainfall days, and 7.6" (193mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Acton, in January, snow falls for 0.3 days, with typically accumulated 0.24" (6mm) of snow. Throughout the year, in Acton, California, there are 1.9 snowfall days, and 5.98" (152mm) of snow is accumulated.Daylight
The average length of the day in January is 10h and 10min.On the first day of the month, sunrise is at 6:59 am and sunset at 4:53 pm. On the last day of January, in Acton, sunrise is at 6:51 am and sunset at 5:21 pm PST.
Sunshine
January has the least sunshine of the year, with an average of 6.7h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 3 in January converts into the following recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. To protect against the Sun's most potent rays, avoid direct exposure around midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Acton in January?
What is the average humidity in January in Acton?
How many days does it rain in January in Acton?
How much does it snow in Acton in January?
How many hours of daylight does Acton have in January?
When is the sunrise / sunset in January in Acton?
What is the month with the least sunshine in Acton?
How many hours of sunshine does Acton have in January?
When is the lowest UV index in Acton?
How high is the UV index in January in Acton?
Average temperature in January
Acton, CA
- Average high temperature in January: 57.9°F
The warmest month (with the highest average high temperature) is August (89.2°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in January: 40.6°F
The month with the highest average low temperature is August (63.1°F).
The coldest month (with the lowest average low temperature) is December (39.2°F).
Average pressure in January
Acton, CA
- Average pressure in January: 30.11"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in January
Acton, CA
- Average wind speed in January: 7.2mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is September (5.7mph).
Average humidity in January
Acton, CA
- Average humidity in January: 52%
The months with the highest relative humidity are February, March and December (54%).
The month with the lowest relative humidity is August (38%).
Average rainfall in January
Acton, CA
- Average rainfall in January: 1.14"
The wettest month (with the highest rainfall) is December (1.65").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in January
Acton, CA
- Average rainfall days in January: 5.6 days
The month with the highest number of rainy days is March (7.4 days).
The month with the least rainy days is June (1.2 days).
Average snowfall in January
Acton, CA
- Average snowfall in January: 0.24"
The month with the highest snowfall is December (3.23").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Acton, CA
- Average snowfall days in January: 0.3 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Acton, 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: 6h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 6h and 42min).
Average sunshine days in January
Acton, CA
- Average sunshine days in January: 24.8 days
The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (21.3 days).
Average UV index in January
Acton, CA
- Average UV index in January: 3
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in January
Acton, CA
- Average cloud cover in January: 22
The months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in January
Acton, 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).
Acton, California, USA
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