San Clemente
California, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
San Clemente, CA

January, the same as December, is another comfortable winter month in San Clemente, California, with average temperature varying between 64.2°F (17.9°C) and 50.9°F (10.5°C).

Temperature

In January, the average high-temperature is essentially the same as in December - a still enjoyable 64.2°F (17.9°C). In San Clemente, the average low-temperature is 50.9°F (10.5°C).

Humidity

In January, the average relative humidity in San Clemente is 62%.

Rainfall

In San Clemente, in January, during 4.8 rainfall days, 0.35" (9mm) of precipitation is typically accumulated. In San Clemente, during the entire year, the rain falls for 51.1 days and collects up to 3.66" (93mm) of precipitation.

Ocean temperature

In January, the average ocean temperature in San Clemente is 59°F (15°C).
Note: For swimming, a surface water temperature of 59°F (15°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

Daylight

The average length of the day in January is 10.2h.

Sunshine

The average sunshine in San Clemente is 6.7h.

UV index

January through March, November and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 4 transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in January in San Clemente?

The average high-temperature, in January, is 64.2°F (17.9°C), while the average low-temperature is 50.9°F (10.5°C).

What is the average humidity in January in San Clemente?

The average relative humidity in January in San Clemente is 62%.

How many days does it rain in January in San Clemente?

In January, in San Clemente, the rain falls for 4.8 days. Throughout January, 0.35" (9mm) of precipitation is accumulated.

What is the ocean temperature in January in San Clemente?

In San Clemente, in January, the average water temperature is 59°F (15°C). For most, swimming in 59°F (15°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

How many hours of daylight does San Clemente have in January?

In San Clemente, California, the average length of the day in January is 10.2h.

How long on average sun shines in January in San Clemente?

The average sunshine in January in San Clemente, California, is 6.7h.

What are the months with the lowest UV index in San Clemente?

January through March, November and December, with an average maximum UV index of 4, are months with the lowest UV index in San Clemente, California.

What is the UV index reading in January in San Clemente?

In San Clemente, the average daily maximum UV index in January is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe exposure to the Sun's UV rays.
Average temperature in January - San Clemente, CA
  • Average high temperature in January: 64.2°F

The warmest month (with the highest average high temperature) is September (77.4°F).
The month with the lowest average high temperature is December (62.6°F).

  • Average low temperature in January: 50.9°F

Months with the highest average low temperature are August and September (63.5°F).
The coldest month (with the lowest average low temperature) is February (49.6°F).

Average humidity in January - San Clemente, CA
  • Average humidity in January: 62%

The month with the highest relative humidity is June (75%).
The month with the lowest relative humidity is November (60%).

Average rainfall in January - San Clemente, CA
  • Average rainfall in January: 0.35"

The wettest month (with the highest rainfall) is December (0.71").
The driest month (with the lowest rainfall) is June (0.08").

Average rainfall days in January - San Clemente, CA
  • Average rainfall days in January: 4.8 days

The month with the highest number of rainy days is March (7.3 days).
The month with the lowest number of rainy days is June (1.4 days).

Average sea temperature in January - San Clemente, CA
  • Average sea temperature in January: 58.9°F

The best month for swimming (with the highest average sea temperature) is August (68.3°F).
Coldest months (with the lowest average sea temperature) are January and February (58.9°F).

Average daylight in January / Average sunshine in January - San Clemente, CA
  • Average daylight in January: 10.2h

The month with the longest days is June (Average daylight: 14.3h).
The month with shortest days is December (Average daylight: 10h).

  • Average sunshine in January: 6.7h

Months with most sunshine are July and August (Average sunshine: 11.8h).
The month with least sunshine is December (Average sunshine: 6.5h).

Average UV index in January - San Clemente, CA
  • Average UV index in January: 4

Months with the highest UV index are July, August and September (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 4).