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 snowfall 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
Riverside's weather in January, with an average high-temperature of a still comfortable 65.3°F (18.5°C), subtly shifts from December's 63.3°F (17.4°C). During the month of January, an average low-temperature of 47.3°F (8.5°C) is recorded.Humidity
In January, the average relative humidity is 49%.Rainfall
In Riverside, in January, it is raining for 5.2 days, with typically 1.1" (28mm) of accumulated precipitation. In Riverside, during the entire year, the rain falls for 49 days and collects up to 7.32" (186mm) of precipitation.Snowfall
In Riverside, snow does not fall in January, March through December.Daylight
In January, the average length of the day is 10h and 12min.On the first day of the month, sunrise is at 6:54 am and sunset at 4:51 pm. On the last day of January, sunrise is at 6:47 am and sunset at 5:18 pm PST.
Sunshine
In January, the average sunshine in Riverside is 6.9h.UV index
The average daily maximum UV index in January is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A daily high UV index of 4 in January leads to these guidelines:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Riverside in January?
What is the average humidity in January in Riverside?
How many days does it rain in January in Riverside?
When it does not snow in Riverside?
Does it snow in Riverside in January?
How many hours of daylight does Riverside have in January?
What time are sunrise and sunset in January in Riverside?
How many hours of sunshine does Riverside have in January?
How high is the UV index in January in Riverside?
Average temperature in January
Riverside, CA
- Average high temperature in January: 65.3°F
The warmest month (with the highest average high temperature) is August (91.2°F).
The month with the lowest average high temperature is December (63.3°F).
- Average low temperature in January: 47.3°F
The month with the highest average low temperature is August (66.4°F).
The coldest month (with the lowest average low temperature) is December (45.9°F).
Average pressure in January
Riverside, 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
Riverside, CA
- Average wind speed in January: 5.2mph
The windiest month (with the highest average wind speed) is May (5.6mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).
Average humidity in January
Riverside, CA
- Average humidity in January: 49%
The month with the highest relative humidity is May (56%).
The month with the lowest relative humidity is August (43%).
Average rainfall in January
Riverside, CA
- Average rainfall in January: 1.1"
The wettest months (with the highest rainfall) are February and December (1.61").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in January
Riverside, 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 (1.1 days).
Average snowfall days in January
Riverside, 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
Riverside, 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 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 48min).
Average sunshine days in January
Riverside, CA
- Average sunshine days in January: 25 days
The month with the most sunshine days is June (27.9 days).
The month with the least sunshine days is February (21.6 days).
Average UV index in January
Riverside, 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
Riverside, CA
- Average cloud cover in January: 21
The months with the most cloud cover are February and March (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in January
Riverside, 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).
Riverside, California, USA
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