January weather forecastRancho Cucamonga, CA
January
Weather in January
January, like December, in Rancho Cucamonga, California, is another enjoyable winter month, with temperature in the range of an average high of 64°F (17.8°C) and an average low of 46.2°F (7.9°C).Temperature
January's advent notes a subtle adjustment in average high-temperature to a still enjoyable 64°F (17.8°C) from December. Rancho Cucamonga throughout January, records an average low-temperature of 46.2°F (7.9°C).Humidity
In Rancho Cucamonga, the average relative humidity in January is 49%.Rainfall
In Rancho Cucamonga, in January, it is raining for 4.6 days, with typically 0.51" (13mm) of accumulated precipitation. Throughout the year, there are 42.3 rainfall days, and 4.53" (115mm) of precipitation is accumulated.Snowfall
January, March through December are months without snowfall in Rancho Cucamonga.Daylight
The average length of the day in January is 10h and 11min.On the first day of the month, sunrise is at 6:55 am and sunset at 4:51 pm. On the last day of January, sunrise is at 6:48 am and sunset at 5:19 pm PST.
Sunshine
The average sunshine in January is 7h.UV index
In Rancho Cucamonga, the average daily maximum UV index in January is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In January, the UV index of 4 transforms into the following advice:
Take necessary precautions - Suggestions to elude sunburn are provided. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Rancho Cucamonga, CA
- Average high temperature in January: 64°F
The warmest month (with the highest average high temperature) is August (91.8°F).
The month with the lowest average high temperature is December (61.7°F).
- Average low temperature in January: 46.2°F
The month with the highest average low temperature is August (66.6°F).
The coldest months (with the lowest average low temperature) are February and December (45.3°F).
Average pressure in January
Rancho Cucamonga, CA
- Average pressure in January: 30.1"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in January
Rancho Cucamonga, CA
- Average wind speed in January: 5.3mph
The windiest month (with the highest average wind speed) is May (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in January
Rancho Cucamonga, CA
- Average humidity in January: 49%
The months with the highest relative humidity are February, March and May (53%).
The month with the lowest relative humidity is August (41%).
Average rainfall in January
Rancho Cucamonga, CA
- Average rainfall in January: 0.51"
The wettest month (with the highest rainfall) is February (0.98").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in January
Rancho Cucamonga, CA
- Average rainfall days in January: 4.6 days
The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (0.9 days).
Average snowfall days in January
Rancho Cucamonga, CA
- Average snowfall days in January: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in January /
Average sunshine in January
Rancho Cucamonga, CA
- Average daylight in January: 10h and 12min
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: 7h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).
Average sunshine days in January
Rancho Cucamonga, CA
- Average sunshine days in January: 25.8 days
The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (22.8 days).
Average UV index in January
Rancho Cucamonga, CA
- Average UV index in January: 4
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in January
Rancho Cucamonga, CA
- Average cloud cover in January: 19
The months with the most cloud cover are February and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in January
Rancho Cucamonga, 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).
