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, a modest change to a still refreshing 56.8°F (13.8°C) from December's 55.8°F (13.2°C) is noted in high-temperature. During January, San Leandro's temperature falls to a steady low-temperature average of 44.1°F (6.7°C).Humidity
In San Leandro, the average relative humidity in January is 73%.Rainfall
In San Leandro, in January, during 8 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. Throughout the year, in San Leandro, there are 57.7 rainfall days, and 5.71" (145mm) of precipitation is accumulated.Daylight
The average length of the day in January in San Leandro is 9h and 55min.On the first day of the month, sunrise is at 7:23 am and sunset at 5:00 pm. On the last day of January, sunrise is at 7:13 am and sunset at 5:30 pm PST.
Sunshine
In January, the average sunshine in San Leandro is 6.2h.UV index
The months with the lowest UV index in San Leandro are January, February, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum high UV index of 3 in January translates into the following recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average January temperature in San Leandro?
What is the average humidity in January in San Leandro?
How much does it rain in San Leandro in January?
What is the average length of the day in January in San Leandro?
When is the sunrise / sunset in January in San Leandro?
How long on average sun shines in January in San Leandro?
What is the month with the lowest UV index in San Leandro?
How high is the UV index in January in San Leandro?
Average temperature in January
San Leandro, CA
- Average high temperature in January: 56.8°F
The warmest months (with the highest average high temperature) are July and September (77.7°F).
The month with the lowest average high temperature is December (55.8°F).
- Average low temperature in January: 44.1°F
The month with the highest average low temperature is September (56.5°F).
The coldest month (with the lowest average low temperature) is January (44.1°F).
Average pressure in January
San Leandro, 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
San Leandro, CA
- Average wind speed in January: 5.1mph
The windiest month (with the highest average wind speed) is May (7mph).
The calmest month (with the lowest average wind speed) is November (4.8mph).
Average humidity in January
San Leandro, CA
- Average humidity in January: 73%
The month with the highest relative humidity is March (75%).
The months with the lowest relative humidity are September and October (64%).
Average rainfall in January
San Leandro, CA
- Average rainfall in January: 0.94"
The wettest month (with the highest rainfall) is February (1.26").
The driest months (with the least rainfall) are July, August and September (0.04").
Average rainfall days in January
San Leandro, CA
- Average rainfall days in January: 8 days
The month with the highest number of rainy days is March (10.2 days).
The month with the least rainy days is August (0.7 days).
Average daylight in January /
Average sunshine in January
San Leandro, CA
- Average daylight in January: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January: 6h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in January
San Leandro, CA
- Average sunshine days in January: 22.2 days
The month with the most sunshine days is July (27.1 days).
The month with the least sunshine days is March (19.1 days).
Average UV index in January
San Leandro, 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
San Leandro, CA
- Average cloud cover in January: 31
The month with the most cloud cover is March (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in January
San Leandro, 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).
San Leandro, California, USA
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