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 sea temperature 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
Rio del Mar starts January with an average high-temperature of a still mild 58.6°F (14.8°C), hinting at a minimal fluctuation from December. Throughout January, Rio del Mar experiences a low-temperature average of 46.9°F (8.3°C).Humidity
In January, the average relative humidity in Rio del Mar is 72%.Rainfall
In January, the rain falls for 9.3 days. Throughout January, 2.56" (65mm) of precipitation is accumulated. In Rio del Mar, during the entire year, the rain falls for 77.9 days and collects up to 14.45" (367mm) of precipitation.Ocean temperature
In Rio del Mar, the average seawater temperature in January is 54.1°F (12.3°C).Note: Swimming in 54.1°F (12.3°C) poses a severe threat. Even short exposure to 55.4°F (13°C) is chilling, and going below 50°F (10°C) can cause breathing irregularities and intense cold shock, based on one's stamina.
Daylight
In January, the average length of the day in Rio del Mar is 9h and 58min.On the first day of January in Rio del Mar, sunrise is at 7:20 am and sunset at 5:01 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 5:31 pm PST.
Sunshine
In Rio del Mar, the average sunshine in January is 6.1h.UV index
In Rio del Mar, the average daily maximum UV index in January is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 4 during January leads to these advisories:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in January in Rio del Mar?
What is the average humidity in January in Rio del Mar?
How much does it rain in Rio del Mar in January?
How cold is the water in January in Rio del Mar?
How many hours of daylight does Rio del Mar have in January?
When is the sunrise / sunset in January in Rio del Mar?
How long on average sun shines in January in Rio del Mar?
How high is the UV index in January in Rio del Mar?
Average temperature in January
Rio del Mar, CA
- Average high temperature in January: 58.6°F
The warmest months (with the highest average high temperature) are August and September (73°F).
The month with the lowest average high temperature is December (57.2°F).
- Average low temperature in January: 46.9°F
The month with the highest average low temperature is September (55.2°F).
The coldest month (with the lowest average low temperature) is February (45.5°F).
Average pressure in January
Rio del Mar, CA
- Average pressure in January: 30.13"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in January
Rio del Mar, CA
- Average wind speed in January: 5.7mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in January
Rio del Mar, CA
- Average humidity in January: 72%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (68%).
Average rainfall in January
Rio del Mar, CA
- Average rainfall in January: 2.56"
The wettest month (with the highest rainfall) is December (2.8").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in January
Rio del Mar, CA
- Average rainfall days in January: 9.3 days
The month with the highest number of rainy days is March (13.4 days).
The month with the least rainy days is August (1.2 days).
Average sea temperature in January
Rio del Mar, CA
- Average sea temperature in January: 54.1°F
The best months for swimming (with the highest average sea temperature) are August and September (58.1°F).
The coldest month (with the lowest average sea temperature) is April (53.8°F).
Average daylight in January /
Average sunshine in January
Rio del Mar, CA
- Average daylight in January: 10h and 0min
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 42min).
- Average sunshine in January: 6h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in January
Rio del Mar, CA
- Average sunshine days in January: 20.5 days
The month with the most sunshine days is August (27.8 days).
The month with the least sunshine days is March (16.4 days).
Average UV index in January
Rio del Mar, CA
- Average UV index in January: 4
The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February and November (UV index 3).
Average cloud cover in January
Rio del Mar, CA
- Average cloud cover in January: 33
The month with the most cloud cover is March (Cloud cover 38).
The months with the least cloud cover are July and September (Cloud cover 15).
Average visibility in January
Rio del Mar, 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).
Rio del Mar, California, USA
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