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 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
Stepping into January, Roseland records an average high-temperature of a still mild 57.2°F (14°C), almost consistent with December. During the month of January, the nighttime temperature falls to an average of 43.2°F (6.2°C).Humidity
In January, the average relative humidity is 75%.Rainfall
In Roseland, California, during January, the rain falls for 10 days and regularly aggregates up to 2.01" (51mm) of precipitation. In Roseland, California, during the entire year, the rain falls for 72.8 days and collects up to 12.01" (305mm) of precipitation.Daylight
In Roseland, the average length of the day in January is 9h and 51min.On the first day of the month, sunrise is at 7:28 am and sunset at 5:00 pm. On the last day of January, in Roseland, sunrise is at 7:16 am and sunset at 5:31 pm PST.
Sunshine
In January, the average sunshine in Roseland is 5.8h.UV index
The months with the lowest UV index in Roseland are January, February, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 3 in January translates into this advice:
Prioritize safety - Recommendations to avert sunburn are shared. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
What is the usual temperature for Roseland in January?
What is the average humidity in January in Roseland?
How much does it rain in Roseland in January?
How many hours of daylight does Roseland have in January?
What time are sunrise and sunset in January in Roseland?
How many hours of sunshine does Roseland have in January?
What are the months with the lowest UV index in Roseland?
What is the UV index intensity in January in Roseland?
Average temperature in January
Roseland, CA
- Average high temperature in January: 57.2°F
The warmest month (with the highest average high temperature) is August (79.7°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in January: 43.2°F
The months with the highest average low temperature are August and September (54.7°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).
Average pressure in January
Roseland, CA
- Average pressure in January: 30.13"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in January
Roseland, CA
- Average wind speed in January: 5.2mph
The windiest month (with the highest average wind speed) is May (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.9mph).
Average humidity in January
Roseland, CA
- Average humidity in January: 75%
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is September (63%).
Average rainfall in January
Roseland, CA
- Average rainfall in January: 2.01"
The wettest month (with the highest rainfall) is February (2.64").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in January
Roseland, CA
- Average rainfall days in January: 10 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (0.8 days).
Average daylight in January /
Average sunshine in January
Roseland, CA
- Average daylight in January: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January: 5h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in January
Roseland, CA
- Average sunshine days in January: 19.9 days
The month with the most sunshine days is July (27.2 days).
The month with the least sunshine days is March (17.1 days).
Average UV index in January
Roseland, CA
- Average UV index in January: 3
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in January
Roseland, CA
- Average cloud cover in January: 36
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in January
Roseland, 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).
Roseland, California, USA
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