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
January brings an average high-temperature of a still mild 57.7°F (14.3°C), nearly identical to the preceding month. The nighttime temperature dips to an icy 41.9°F (5.5°C) on average during January.Humidity
January is the most humid month, with an average relative humidity of 72%.Rainfall
In Riverdale Park, in January, it is raining for 5.9 days, with typically 0.75" (19mm) of accumulated precipitation. Throughout the year, there are 54.3 rainfall days, and 6.54" (166mm) of precipitation is accumulated.Daylight
In Riverdale Park, the average length of the day in January is 9h and 55min.On the first day of January, sunrise is at 7:19 am and sunset at 4:56 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:26 pm PST.
Sunshine
In January, the average sunshine is 6.3h.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: In January, the average maximum UV index of 3 translates into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average January temperature in Riverdale Park?
What is the most humid month?
What is the average humidity in January?
How much does it rain in January?
How many hours of daylight does Riverdale Park have in January?
When is the sunrise / sunset in January?
How many hours of sunshine does Riverdale Park have in January?
What is the month with the lowest UV index in Riverdale Park?
What is the UV index intensity in January?
Average temperature in January
Riverdale Park, CA
- Average high temperature in January: 57.7°F
The warmest month (with the highest average high temperature) is July (97.7°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in January: 41.9°F
The month with the highest average low temperature is July (62.1°F).
The coldest months (with the lowest average low temperature) are January and December (41.9°F).
Average pressure in January
Riverdale Park, CA
- Average pressure in January: 30.15"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Riverdale Park, CA
- Average wind speed in January: 5.3mph
The windiest month (with the highest average wind speed) is June (7.3mph).
The calmest month (with the lowest average wind speed) is November (5.2mph).
Average humidity in January
Riverdale Park, CA
- Average humidity in January: 72%
The month with the highest relative humidity is January (72%).
The month with the lowest relative humidity is July (37%).
Average rainfall in January
Riverdale Park, CA
- Average rainfall in January: 0.75"
The wettest month (with the highest rainfall) is March (1.3").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in January
Riverdale Park, CA
- Average rainfall days in January: 5.9 days
The month with the highest number of rainy days is March (10.3 days).
The month with the least rainy days is August (0.9 days).
Average daylight in January /
Average sunshine in January
Riverdale Park, 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 2min
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 0min).
Average sunshine days in January
Riverdale Park, CA
- Average sunshine days in January: 24.1 days
The month with the most sunshine days is August (29.2 days).
The month with the least sunshine days is March (19.6 days).
Average UV index in January
Riverdale Park, CA
- Average UV index in January: 3
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in January
Riverdale Park, CA
- Average cloud cover in January: 30
The month with the most cloud cover is March (Cloud cover 33).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in January
Riverdale Park, 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).
Riverdale Park, California, USA
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