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 snowfall 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
Shifting into January, San Geronimo records an average high-temperature of a mild 55.9°F (13.3°C), presenting minor fluctuations compared to the previous month. San Geronimo's nighttime temperature in January drops to an average of 46.6°F (8.1°C).Humidity
In January, the average relative humidity in San Geronimo is 74%.Rainfall
In San Geronimo, in January, during 10.3 rainfall days, 2.64" (67mm) of precipitation is typically accumulated. In San Geronimo, during the entire year, the rain falls for 80.3 days and collects up to 15.98" (406mm) of precipitation.Snowfall
In San Geronimo, snow does not fall in January through November.Daylight
The average length of the day in January is 9h and 53min.On the first day of January in San Geronimo, California, sunrise is at 7:26 am and sunset at 5:01 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 5:32 pm PST.
Sunshine
In San Geronimo, the average sunshine in January is 5.7h.UV index
In January, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In January, the maximum UV index of 4 translates into these guidelines:
Take necessary precautions - Suggestions to elude sunburn are provided. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in San Geronimo in January?
What is the average humidity in January in San Geronimo?
How much does it rain in San Geronimo in January?
When it does not snow in San Geronimo?
Does it snow in San Geronimo in January?
How many hours of daylight does San Geronimo have in January?
When are sunrise and sunset in January in San Geronimo?
How many hours of sunshine does San Geronimo have in January?
How high is the UV index in January in San Geronimo?
Average temperature in January
San Geronimo, CA
- Average high temperature in January: 55.9°F
The warmest month (with the highest average high temperature) is September (70.9°F).
The month with the lowest average high temperature is December (55.2°F).
- Average low temperature in January: 46.6°F
The month with the highest average low temperature is September (56.3°F).
The coldest month (with the lowest average low temperature) is December (46°F).
Average pressure in January
San Geronimo, 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 Geronimo, CA
- Average wind speed in January: 6.5mph
The windiest months (with the highest average wind speed) are April and May (8.3mph).
The calmest month (with the lowest average wind speed) is November (5.9mph).
Average humidity in January
San Geronimo, CA
- Average humidity in January: 74%
The month with the highest relative humidity is August (78%).
The month with the lowest relative humidity is October (69%).
Average rainfall in January
San Geronimo, CA
- Average rainfall in January: 2.64"
The wettest month (with the highest rainfall) is February (3.43").
The driest months (with the least rainfall) are July and August (0.08").
Average rainfall days in January
San Geronimo, CA
- Average rainfall days in January: 10.3 days
The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is July (2.3 days).
Average snowfall days in January
San Geronimo, CA
- Average snowfall days in January: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in January /
Average sunshine in January
San Geronimo, CA
- Average daylight in January: 9h and 5min
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 36min).
- Average sunshine in January: 5h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in January
San Geronimo, CA
- Average sunshine days in January: 20.1 days
The months with the most sunshine days are June and July (24.8 days).
The month with the least sunshine days is March (16.6 days).
Average UV index in January
San Geronimo, CA
- Average UV index in January: 4
The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover in January
San Geronimo, CA
- Average cloud cover in January: 36
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 19).
Average visibility in January
San Geronimo, 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 Geronimo, California, USA
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