January weather forecastDiablo, CA
January
Weather in January
January, the same as December, in Diablo, California, is another refreshing winter month, with temperature in the range of an average high of 56.8°F (13.8°C) and an average low of 42.1°F (5.6°C).Temperature
The transition from December to January sees average high-temperatures adjusting to a still moderate 56.8°F (13.8°C), from a not significantly different 55.8°F (13.2°C). Diablo experiences a mean temperature of 42.1°F (5.6°C) during January nights.Humidity
In January, the average relative humidity in Diablo is 73%.Rainfall
In Diablo, in January, during 8.8 rainfall days, 1.97" (50mm) of precipitation is typically accumulated. Throughout the year, there are 65.6 rainfall days, and 11.22" (285mm) of precipitation is accumulated.Daylight
The average length of the day in January in Diablo is 9h and 54min.On the first day of the month, sunrise is at 7:23 am and sunset at 4:59 pm. On the last day of January, sunrise is at 7:12 am and sunset at 5:29 pm PST.
Sunshine
In January, the average sunshine is 6.1h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index, 3 in January, converts into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. 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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Diablo, CA
- Average high temperature in January: 56.8°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is December (55.8°F).
- Average low temperature in January: 42.1°F
The months with the highest average low temperature are August and September (56.7°F).
The coldest month (with the lowest average low temperature) is January (42.1°F).
Average pressure in January
Diablo, CA
- Average pressure in January: 30.14"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in January
Diablo, CA
- Average wind speed in January: 4.5mph
The windiest month (with the highest average wind speed) is May (6.9mph).
The calmest month (with the lowest average wind speed) is November (4.3mph).
Average humidity in January
Diablo, CA
- Average humidity in January: 73%
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is September (57%).
Average rainfall in January
Diablo, CA
- Average rainfall in January: 1.97"
The wettest month (with the highest rainfall) is February (2.36").
The driest months (with the least rainfall) are July and August (0").
Average rainfall days in January
Diablo, CA
- Average rainfall days in January: 8.8 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (0.6 days).
Average daylight in January /
Average sunshine in January
Diablo, CA
- Average daylight in January: 9h and 54min
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 6min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in January
Diablo, CA
- Average sunshine days in January: 21 days
The month with the most sunshine days is July (30.2 days).
The month with the least sunshine days is March (17.6 days).
Average UV index in January
Diablo, CA
- Average UV index in January: 3
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in January
Diablo, CA
- Average cloud cover in January: 33
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 6).
Average visibility in January
Diablo, 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).
