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
Downey records an average high-temperature of a still enjoyable 66.6°F (19.2°C) as January arrives, nearly mirroring the previous month's climate. Downey records an average nighttime low of 51.4°F (10.8°C) in January.Humidity
The average relative humidity in January in Downey is 53%.Rainfall
In Downey, California, during January, the rain falls for 4.4 days and regularly aggregates up to 1.22" (31mm) of precipitation. Throughout the year, in Downey, California, there are 46 rainfall days, and 6.77" (172mm) of precipitation is accumulated.Daylight
In January, the average length of the day in Downey is 10h and 12min.On the first day of January in Downey, sunrise is at 6:57 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 5:21 pm PST.
Sunshine
January, February and December, with an average of 6.8h of sunshine, are months with the least sunshine in Downey.UV index
In Downey, the average daily maximum UV index in January is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: A maximum high daily UV index of 5 during January translates into the following directions:
Heed the precautions - It is counselled to guard against solar damage. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Frequently asked questions
What is the temperature in January in Downey?
What is the average humidity in January in Downey?
How many days does it rain in January in Downey?
How many hours of daylight does Downey have in January?
When are sunrise and sunset in January in Downey?
What are the months with the least sunshine in Downey?
How long on average sun shines in January in Downey?
What is the UV index reading in January in Downey?
Average temperature in January
Downey, CA
- Average high temperature in January: 66.6°F
The warmest month (with the highest average high temperature) is August (84°F).
The month with the lowest average high temperature is December (64.9°F).
- Average low temperature in January: 51.4°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (50.5°F).
Average pressure in January
Downey, CA
- Average pressure in January: 30.1"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.89"Hg).
Average wind speed in January
Downey, CA
- Average wind speed in January: 5.3mph
The windiest month (with the highest average wind speed) is April (6.1mph).
The calmest months (with the lowest average wind speed) are September and October (4.7mph).
Average humidity in January
Downey, CA
- Average humidity in January: 53%
The month with the highest relative humidity is June (65%).
The month with the lowest relative humidity is November (51%).
Average rainfall in January
Downey, CA
- Average rainfall in January: 1.22"
The wettest month (with the highest rainfall) is December (1.42").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in January
Downey, CA
- Average rainfall days in January: 4.4 days
The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is June (1.3 days).
Average daylight in January /
Average sunshine in January
Downey, CA
- Average daylight in January: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in January: 6h and 5min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 48min).
Average sunshine days in January
Downey, CA
- Average sunshine days in January: 25.5 days
The month with the most sunshine days is August (26.3 days).
The month with the least sunshine days is February (22.2 days).
Average UV index in January
Downey, CA
- Average UV index in January: 5
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are February, November and December (UV index 4).
Average cloud cover in January
Downey, CA
- Average cloud cover in January: 21
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in January
Downey, 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).
Downey, California, USA
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