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
The start of January sees the average high-temperature at a still refreshing 58.6°F (14.8°C), showing little difference from December's 57.2°F (14°C). Throughout the January nights, Opal Cliffs encounters a low-temperature of 46.9°F (8.3°C).Humidity
In January, the average relative humidity is 72%.Rainfall
In Opal Cliffs, in January, during 9.3 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. Throughout the year, there are 77.9 rainfall days, and 14.45" (367mm) of precipitation is accumulated.Ocean temperature
In January, the average ocean temperature is 54.1°F (12.3°C).Note: Swimming in 54.1°F (12.3°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.
Daylight
The average length of the day in January is 9h and 58min.On the first day of the month, sunrise is at 7:20 am and sunset at 5:01 pm. On the last day of January, sunrise is at 7:11 am and sunset at 5:31 pm PST.
Sunshine
In January, the average sunshine in Opal Cliffs is 6.1h.UV index
In January, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 4 during January translates into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in January?
What is the average humidity in January?
How much does it rain in January?
What is the water temperature in January?
What is the average length of the day in January?
When is the sunrise / sunset in January?
How many hours of sunshine does Opal Cliffs have in January?
How high is the UV index in January?
Average temperature in January
Opal Cliffs, 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
Opal Cliffs, 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
Opal Cliffs, 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
Opal Cliffs, 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
Opal Cliffs, 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
Opal Cliffs, 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
Opal Cliffs, 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
Opal Cliffs, 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
Opal Cliffs, 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
Opal Cliffs, 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
Opal Cliffs, 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
Opal Cliffs, 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).
Opal Cliffs, California, USA
Weather forecast for your location
2. Allow the app to use your location