January weather forecast and climate
Chula Vista, CA

Wood and rope barriers at sunset on the waterfront of Bayside Park in Chula Vista, San Diego Bay, California
Wood and rope barriers at sunset on the waterfront of Bayside Park in Chula Vista, San Diego Bay, California

Weather in January

January, like December, in Chula Vista, California, is another enjoyable winter month, with average temperature ranging between min 51.8°F (11°C) and max 65.1°F (18.4°C).

Temperature

In Chula Vista, California, the average high-temperature in January is relatively the same as in December - a still comfortable 65.1°F (18.4°C). The average low-temperature, is 51.8°F (11°C).

Humidity

The average relative humidity in Chula Vista is 59%.

Rainfall

In Chula Vista, during 4.7 rainfall days, 0.55" (14mm) of precipitation is typically accumulated. In Chula Vista, during the entire year, the rain falls for 51 days and collects up to 5.63" (143mm) of precipitation.

Ocean temperature

In Chula Vista, California, the average water temperature is 59.4°F (15.2°C).
Note: For swimming, a surface water temperature of 59.4°F (15.2°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

In January, the average length of the day in Chula Vista is 10.3h.

Sunshine

In January, the average sunshine is 6.8h.

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 value of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 4 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in January in Chula Vista?

In Chula Vista, in January, the average high-temperature is 65.1°F (18.4°C), and the average low-temperature is 51.8°F (11°C).

What is the average humidity in January in Chula Vista?

In Chula Vista, the average relative humidity in January is 59%.

How much does it rain in Chula Vista in January?

In Chula Vista, California, in January, during 4.7 rainfall days, 0.55" (14mm) of precipitation is typically accumulated.

How cold is the water in January in Chula Vista?

In January, the average ocean temperature is 59.4°F (15.2°C). For swimming, a surface water temperature of 59.4°F (15.2°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).

What is the average length of the day in January in Chula Vista?

In January, the average length of the day in Chula Vista is 10.3h.

How long on average sun shines in January in Chula Vista?

In Chula Vista, the average sunshine in January is 6.8h.

When is the lowest UV index in Chula Vista?

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

How high is the UV index in January in Chula Vista?

In January, the average daily maximum UV index in Chula Vista is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV rays.

Average temperature in January
Chula Vista, CA

Average temperature in January - Chula Vista, CA
  • Average high temperature in January: 65.1°F

The warmest month (with the highest average high temperature) is August (79.2°F).
The month with the lowest average high temperature is December (63.7°F).

  • Average low temperature in January: 51.8°F

The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is February (51.1°F).

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Average pressure in January
Chula Vista, CA

Average pressure in January - Chula Vista, CA
  • Average pressure in January: 30.09"

The month with the highest atmospheric pressure is January (30.09").
Months with the lowest atmospheric pressure are June and September (29.88").

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Average wind speed in January
Chula Vista, CA

Average wind speed in January - Chula Vista, CA
  • Average wind speed in January: 5.2mph

The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest month (with the lowest average wind speed) is October (5mph).

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Average humidity in January
Chula Vista, CA

Average humidity in January - Chula Vista, CA
  • Average humidity in January: 59%

The month with the highest relative humidity is June (71%).
The month with the lowest relative humidity is November (58%).

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Average rainfall in January
Chula Vista, CA

Average rainfall in January - Chula Vista, CA
  • Average rainfall in January: 0.55"

The wettest month (with the highest rainfall) is February (1.1").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in January
Chula Vista, CA

Average rainfall days in January - Chula Vista, CA
  • Average rainfall days in January: 4.7 days

The month with the highest number of rainy days is March (7.2 days).
The month with the least rainy days is June (1.7 days).

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Average sea temperature in January
Chula Vista, CA

Average sea temperature in January - Chula Vista, CA
  • Average sea temperature in January: 59.2°F

The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (58.7°F).

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Average daylight in January /
Average sunshine in January
Chula Vista, CA

Average daylight in January / Average sunshine in January - Chula Vista, CA
  • Average daylight in January: 10.3h

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

  • Average sunshine in January: 6.8h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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Average sunshine days in January
Chula Vista, CA

Average sunshine days in January - Chula Vista, CA
  • Average sunshine days in January: 25.1 days

The month with the most sunshine days is June (27.2 days).
The month with the least sunshine days is February (21.1 days).

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Average UV index in January
Chula Vista, CA

Average UV index in January - Chula Vista, CA
  • Average UV index in January: 4

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

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Average cloud cover in January
Chula Vista, CA

Average cloud cover in January - Chula Vista, CA
  • Average cloud cover in January: 20

Months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 8).

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Average visibility in January
Chula Vista, CA

Average visibility in January - Chula Vista, CA
  • Average visibility in January: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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