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
The ushering in of January brings an average high-temperature of a still refreshing 65.7°F (18.7°C), closely mirroring the 63.5°F (17.5°C) of December. Rosemead's nighttime temperature in January drops to an average of 48.6°F (9.2°C).Humidity
In Rosemead, the average relative humidity in January is 51%.Rainfall
In Rosemead, California, during January, the rain falls for 4.4 days and regularly aggregates up to 1.1" (28mm) of precipitation. Throughout the year, in Rosemead, there are 43 rainfall days, and 6.06" (154mm) of precipitation is accumulated.Daylight
In January, the average length of the day in Rosemead, California, is 10h and 11min.On the first day of the month, sunrise is at 6:57 am and sunset at 4:53 pm. On the last day of January, sunrise is at 6:50 am and sunset at 5:21 pm PST.
Sunshine
January, February and December, with an average of 6.9h of sunshine, are months with the least sunshine in Rosemead.UV index
January, February, November and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In January, an average UV index of 4 transforms into the following instructions:
Undertake protective steps - Recommendations to avoid sunburn are issued. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Frequently asked questions
What is the temperature in January in Rosemead?
What is the average humidity in January in Rosemead?
How much does it rain in Rosemead in January?
How many hours of daylight does Rosemead have in January?
When are sunrise and sunset in January in Rosemead?
What is the month with the least sunshine in Rosemead?
How many hours of sunshine does Rosemead have in January?
What are the months with the lowest UV index in Rosemead?
How high is the UV index in January in Rosemead?
Average temperature in January
Rosemead, CA
- Average high temperature in January: 65.7°F
The warmest month (with the highest average high temperature) is August (87.4°F).
The month with the lowest average high temperature is December (63.5°F).
- Average low temperature in January: 48.6°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is December (47.5°F).
Average pressure in January
Rosemead, 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 (29.88"Hg).
Average wind speed in January
Rosemead, CA
- Average wind speed in January: 5.3mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest months (with the lowest average wind speed) are September and October (4.5mph).
Average humidity in January
Rosemead, CA
- Average humidity in January: 51%
The month with the highest relative humidity is June (59%).
The month with the lowest relative humidity is November (47%).
Average rainfall in January
Rosemead, CA
- Average rainfall in January: 1.1"
The wettest month (with the highest rainfall) is February (1.3").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in January
Rosemead, CA
- Average rainfall days in January: 4.4 days
The month with the highest number of rainy days is March (5.5 days).
The month with the least rainy days is June (1.2 days).
Average daylight in January /
Average sunshine in January
Rosemead, 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 5min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 54min).
Average sunshine days in January
Rosemead, CA
- Average sunshine days in January: 25.6 days
The month with the most sunshine days is June (27.5 days).
The month with the least sunshine days is February (22.2 days).
Average UV index in January
Rosemead, CA
- Average UV index in January: 4
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 4).
Average cloud cover in January
Rosemead, CA
- Average cloud cover in January: 20
The month with the most cloud cover is December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in January
Rosemead, 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).
Rosemead, California, USA
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