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, Colma's average high-temperature clocks in at a still refreshing 56.1°F (13.4°C), showing a minor fluctuation from the previous month. Nighttime temperature sees a small decrement from daytime highs, dipping to an average of 47.8°F (8.8°C) during January.Humidity
In January, the average relative humidity is 74%.Rainfall
In Colma, in January, during 10.3 rainfall days, 2.28" (58mm) of precipitation is typically accumulated. In Colma, California, during the entire year, the rain falls for 82.2 days and collects up to 13.62" (346mm) of precipitation.Daylight
In Colma, the average length of the day in January is 9h and 55min.On the first day of the month, sunrise is at 7:24 am and sunset at 5:01 pm. On the last day of January, sunrise is at 7:14 am and sunset at 5:32 pm PST.
Sunshine
In Colma, the average sunshine in January is 5.9h.UV index
In Colma, the average daily maximum UV index in January is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high daily UV index of 4 during January translates into the following directions:
Undertake precautions - Guarding against sun damage is counselled. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Frequently asked questions
What is the usual temperature for Colma in January?
What is the average humidity in January in Colma?
How many days does it rain in January in Colma?
How many hours of daylight does Colma have in January?
What time are sunrise and sunset in January in Colma?
How long on average sun shines in January in Colma?
How high is the UV index in January in Colma?
Average temperature in January
Colma, CA
- Average high temperature in January: 56.1°F
The warmest month (with the highest average high temperature) is September (69.1°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in January: 47.8°F
The month with the highest average low temperature is September (56.5°F).
The coldest month (with the lowest average low temperature) is February (47.7°F).
Average pressure in January
Colma, 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 August and September (29.92"Hg).
Average wind speed in January
Colma, CA
- Average wind speed in January: 6.8mph
The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest month (with the lowest average wind speed) is September (6.3mph).
Average humidity in January
Colma, CA
- Average humidity in January: 74%
The month with the highest relative humidity is August (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
Colma, CA
- Average rainfall in January: 2.28"
The wettest month (with the highest rainfall) is February (2.8").
The driest months (with the least rainfall) are July and August (0.08").
Average rainfall days in January
Colma, 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 (2.7 days).
Average daylight in January /
Average sunshine in January
Colma, 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: 5h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in January
Colma, CA
- Average sunshine days in January: 20 days
The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is March (16.6 days).
Average UV index in January
Colma, 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
Colma, CA
- Average cloud cover in January: 34
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 18).
Average visibility in January
Colma, 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).
Colma, California, USA
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