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
As December turns into January, the average high-temperatures rest at a still comfortable 65.8°F (18.8°C), showing a minor variation from the prior month. Bostonia, during the nights of January, experiences an average temperature drop to a chilly 48.4°F (9.1°C).Humidity
In January, the average relative humidity in Bostonia is 55%.Rainfall
In Bostonia, in January, it is raining for 5.2 days, with typically 1.1" (28mm) of accumulated precipitation. In Bostonia, during the entire year, the rain falls for 56.1 days and collects up to 8.27" (210mm) of precipitation.Daylight
In January, the average length of the day in Bostonia is 10h and 17min.On the first day of January, sunrise is at 6:50 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 5:19 pm PST.
Sunshine
The average sunshine in January in Bostonia is 6.9h.UV index
The months with the lowest UV index in Bostonia are January, February, November and December, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 4 during January leads to these instructions:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Frequently asked questions
What is the usual temperature for Bostonia in January?
What is the average humidity in January in Bostonia?
How much does it rain in Bostonia in January?
What is the average length of the day in January in Bostonia?
When is the sunrise / sunset in January in Bostonia?
How long on average sun shines in January in Bostonia?
What is the month with the lowest UV index in Bostonia?
What is the UV index intensity in January in Bostonia?
Average temperature in January
Bostonia, CA
- Average high temperature in January: 65.8°F
The warmest month (with the highest average high temperature) is August (83.8°F).
The month with the lowest average high temperature is December (63.7°F).
- Average low temperature in January: 48.4°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is December (47.8°F).
Average pressure in January
Bostonia, CA
- Average pressure in January: 30.09"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are June and September (29.87"Hg).
Average wind speed in January
Bostonia, CA
- Average wind speed in January: 4.8mph
The windiest month (with the highest average wind speed) is April (5.5mph).
The calmest month (with the lowest average wind speed) is October (4.3mph).
Average humidity in January
Bostonia, CA
- Average humidity in January: 55%
The month with the highest relative humidity is May (66%).
The month with the lowest relative humidity is November (53%).
Average rainfall in January
Bostonia, CA
- Average rainfall in January: 1.1"
The wettest month (with the highest rainfall) is February (1.81").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in January
Bostonia, CA
- Average rainfall days in January: 5.2 days
The month with the highest number of rainy days is March (7.7 days).
The month with the least rainy days is June (1.4 days).
Average daylight in January /
Average sunshine in January
Bostonia, CA
- Average daylight in January: 10h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January: 6h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in January
Bostonia, CA
- Average sunshine days in January: 25.4 days
The month with the most sunshine days is June (27.7 days).
The month with the least sunshine days is February (21.9 days).
Average UV index in January
Bostonia, 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
Bostonia, CA
- Average cloud cover in January: 20
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in January
Bostonia, 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).
Bostonia, California, USA
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