January weather forecastRosemont, CA
January
Weather in January
January in Rosemont, California, is a moderate winter month, with an average temperature fluctuating between 56.1°F (13.4°C) and 40.8°F (4.9°C).Temperature
The average high-temperature during January is a mild 56.1°F (13.4°C), almost matching the conditions of the preceding month. Rosemont's average low-temperature during January nights is observed to be an icy 40.8°F (4.9°C).Humidity
The average relative humidity in January is 73%.Rainfall
In Rosemont, during January, the rain falls for 8.7 days and regularly aggregates up to 2.2" (56mm) of precipitation. Throughout the year, in Rosemont, there are 70.5 rainfall days, and 15.04" (382mm) of precipitation is accumulated.Daylight
In Rosemont, the average length of the day in January is 9h and 50min.On the first day of the month, sunrise is at 7:22 am and sunset at 4:54 pm. On the last day of January, in Rosemont, sunrise is at 7:11 am and sunset at 5:25 pm PST.
Sunshine
The average sunshine in January in Rosemont, California, is 6h.UV index
The months with the lowest UV index in Rosemont are January, February, November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: In January, the maximum UV index of 3 translates into these guidelines:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Rosemont, CA
- Average high temperature in January: 56.1°F
The warmest month (with the highest average high temperature) is July (94.5°F).
The month with the lowest average high temperature is December (54.3°F).
- Average low temperature in January: 40.8°F
The month with the highest average low temperature is August (59.9°F).
The coldest months (with the lowest average low temperature) are January and December (40.8°F).
Average pressure in January
Rosemont, CA
- Average pressure in January: 30.15"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in January
Rosemont, CA
- Average wind speed in January: 4.8mph
The windiest month (with the highest average wind speed) is February (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.1mph).
Average humidity in January
Rosemont, CA
- Average humidity in January: 73%
The month with the highest relative humidity is March (75%).
The months with the lowest relative humidity are July and September (44%).
Average rainfall in January
Rosemont, CA
- Average rainfall in January: 2.2"
The wettest month (with the highest rainfall) is March (2.72").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in January
Rosemont, CA
- Average rainfall days in January: 8.7 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is July (1 days).
Average daylight in January /
Average sunshine in January
Rosemont, CA
- Average daylight in January: 9h and 48min
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: 6h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in January
Rosemont, CA
- Average sunshine days in January: 21.6 days
The month with the most sunshine days is July (29.7 days).
The month with the least sunshine days is March (17.6 days).
Average UV index in January
Rosemont, CA
- Average UV index in January: 3
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in January
Rosemont, CA
- Average cloud cover in January: 34
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in January
Rosemont, 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).
