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
On the advent of January, Alta Loma's average high-temperature exhibits a minor adjustment to a still comfortable 63.9°F (17.7°C) from December's 61.3°F (16.3°C). Throughout January, an average low-temperature of 46°F (7.8°C) is expected.Humidity
In Alta Loma, the average relative humidity in January is 49%.Rainfall
In Alta Loma, California, in January, during 5.6 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. In Alta Loma, during the entire year, the rain falls for 50.5 days and collects up to 7.56" (192mm) of precipitation.Daylight
In Alta Loma, 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 4:51 pm. On the last day of January, in Alta Loma, sunrise is at 6:48 am and sunset at 5:19 pm PST.
Sunshine
The average sunshine in January in Alta Loma is 7h.UV index
In January, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The daily maximum UV index of 4 in January interprets into the following advice:
Make use of precautions - It is urged to ward off sun damage. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Frequently asked questions
What are the temperatures in Alta Loma in January?
What is the average humidity in January in Alta Loma?
How much does it rain in Alta Loma in January?
How many hours of daylight does Alta Loma have in January?
When are sunrise and sunset in January in Alta Loma?
How many hours of sunshine does Alta Loma have in January?
What is the UV index reading in January in Alta Loma?
Average temperature in January
Alta Loma, CA
- Average high temperature in January: 63.9°F
The warmest month (with the highest average high temperature) is August (91.2°F).
The month with the lowest average high temperature is December (61.3°F).
- Average low temperature in January: 46°F
The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is February (45.1°F).
Average pressure in January
Alta Loma, 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 (29.86"Hg).
Average wind speed in January
Alta Loma, CA
- Average wind speed in January: 5.3mph
The windiest months (with the highest average wind speed) are April and May (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in January
Alta Loma, CA
- Average humidity in January: 49%
The months with the highest relative humidity are February, March and May (53%).
The month with the lowest relative humidity is August (41%).
Average rainfall in January
Alta Loma, CA
- Average rainfall in January: 1.02"
The wettest month (with the highest rainfall) is February (1.73").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in January
Alta Loma, CA
- Average rainfall days in January: 5.6 days
The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is June (1.2 days).
Average daylight in January /
Average sunshine in January
Alta Loma, 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 6min).
The month with the least sunshine is February (Average sunshine: 6h and 54min).
Average sunshine days in January
Alta Loma, CA
- Average sunshine days in January: 24.2 days
The month with the most sunshine days is June (27.7 days).
The month with the least sunshine days is February (21.4 days).
Average UV index in January
Alta Loma, CA
- Average UV index in January: 4
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in January
Alta Loma, CA
- Average cloud cover in January: 19
The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in January
Alta Loma, 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).
Alta Loma, California, USA
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