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
With the onset of January, the average high-temperature stands at a still enjoyable 65.7°F (18.7°C), closely aligned with December's 63.5°F (17.5°C). In January, South San Gabriel experiences a temperature dip to an average of 48.6°F (9.2°C) at night.Humidity
In January, the average relative humidity in South San Gabriel is 51%.Rainfall
In January, the rain falls for 4.4 days. Throughout January, 1.1" (28mm) of precipitation is accumulated. In South San Gabriel, during the entire year, the rain falls for 43 days and collects up to 6.06" (154mm) of precipitation.Daylight
The average length of the day in January in South San Gabriel 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
The months with the least sunshine in South San Gabriel, California, are January, February and December, with an average of 6.9h of sunshine.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 reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index, 4 during January, leads to the following recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average January temperature in South San Gabriel?
What is the average humidity in January in South San Gabriel?
How much does it rain in South San Gabriel in January?
What is the average length of the day in January in South San Gabriel?
When is the sunrise / sunset in January in South San Gabriel?
What is the month with the least sunshine in South San Gabriel?
How many hours of sunshine does South San Gabriel have in January?
What is the month with the lowest UV index in South San Gabriel?
What is the UV index reading in January in South San Gabriel?
Average temperature in January
South San Gabriel, 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
South San Gabriel, 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
South San Gabriel, 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
South San Gabriel, 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
South San Gabriel, 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
South San Gabriel, 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
South San Gabriel, 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
South San Gabriel, 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
South San Gabriel, 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
South San Gabriel, 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
South San Gabriel, 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).
South San Gabriel, California, USA
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