January weather forecast
Carlsbad, CA

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The skyline and clear coastline of Carlsbad in California
The skyline and clear coastline of Carlsbad in California

Weather in January

With slightly cooler days extending from December, January in Carlsbad experiences colder yet comfortable weather. The long hours of daylight keep the city vibrant well past early evening. A gentle winter breeze adds a crisp touch to the overall atmosphere. Noticeably, the rainfall measures average 1.26" (32mm), rendering the wettest month of the year. Additionally, residents are advised to carry a light jacket for those chillier days.

Temperature

Carlsbad's weather, upon January's arrival, documents an average high-temperature of a still enjoyable 64°F (17.8°C), nearly identical to the prior month. January brings with it a nighttime average temperature of 50.7°F (10.4°C) in Carlsbad.

Humidity

In January, the average relative humidity is 61%.

Rainfall

In Carlsbad, California, during January, the rain falls for 6 days and regularly aggregates up to 1.26" (32mm) of precipitation. Throughout the year, there are 68.2 rainfall days, and 9.49" (241mm) of precipitation is accumulated.

Ocean temperature

January and February, with an average ocean temperature of 58.6°F (14.8°C), are months with the coldest seawater.
Note: Beware of 58.6°F (14.8°C) waters at 55.4°F (13°C), they're uninviting, and a dip below 50°F (10°C) has risks of breath loss and cold shock, contingent on health.

Daylight

The average length of the day in January is 10h and 16min.
On the first day of January, sunrise is at 6:52 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 5:20 pm PST.

Sunshine

In Carlsbad, California, the average sunshine in January is 6.8h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The UV index of 4 during January leads to these advisories:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
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Frequently asked questions

What is the temperature in January in Carlsbad?

The high-temperature, in January, in Carlsbad, is 64°F (17.8°C), while the low-temperature averages to 50.7°F (10.4°C).

What is the average humidity in January in Carlsbad?

In January, the average relative humidity in Carlsbad, California, is 61%.

How much does it rain in Carlsbad in January?

In Carlsbad, during January, the rain falls for 6 days and regularly aggregates up to 1.26" (32mm) of precipitation.

When is the ocean coldest in Carlsbad?

January and February, with an average ocean temperature of 58.6°F (14.8°C), are months with the coldest seawater in Carlsbad.

How cold is the water in January in Carlsbad?

In Carlsbad, California, the average seawater temperature in January is 58.6°F (14.8°C). Swimming in 58.6°F (14.8°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.

How many hours of daylight does Carlsbad have in January?

In Carlsbad, the average day length in January is 10h and 16min.

What time are sunrise and sunset in January in Carlsbad?

On the first day of January in Carlsbad, sunrise is at 6:52 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 5:20 pm PST.

How many hours of sunshine does Carlsbad have in January?

The average sunshine duration in January in Carlsbad is 6.8h.

When is the lowest UV index in Carlsbad?

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

How high is the UV index in January in Carlsbad?

In January, the average daily maximum UV index in Carlsbad is 4. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Carlsbad, CA

Average temperature in January - Carlsbad, CA
  • Average high temperature in January: 64°F

The warmest month (with the highest average high temperature) is August (78.6°F).
The month with the lowest average high temperature is December (62.4°F).

  • Average low temperature in January: 50.7°F

The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is February (49.6°F).

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Average pressure in January
Carlsbad, CA

Average pressure in January - Carlsbad, CA
  • Average pressure in January: 30.09"Hg

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

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Average wind speed in January
Carlsbad, CA

Average wind speed in January - Carlsbad, CA
  • Average wind speed in January: 5.1mph

The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest month (with the lowest average wind speed) is October (4.8mph).

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Average humidity in January
Carlsbad, CA

Average humidity in January - Carlsbad, CA
  • Average humidity in January: 61%

The month with the highest relative humidity is June (73%).
The month with the lowest relative humidity is November (60%).

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Average rainfall in January
Carlsbad, CA

Average rainfall in January - Carlsbad, CA
  • Average rainfall in January: 1.26"

The wettest month (with the highest rainfall) is December (1.97").
The driest month (with the least rainfall) is June (0.12").

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Average rainfall days in January
Carlsbad, CA

Average rainfall days in January - Carlsbad, CA
  • Average rainfall days in January: 6 days

The month with the highest number of rainy days is March (8 days).
The month with the least rainy days is June (2.7 days).

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Average sea temperature in January
Carlsbad, CA

Average sea temperature in January - Carlsbad, CA
  • Average sea temperature in January: 58.7°F

The best month for swimming (with the highest average sea temperature) is August (68°F).
The coldest months (with the lowest average sea temperature) are January and February (58.7°F).

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Average daylight in January /
Average sunshine in January
Carlsbad, CA

Average daylight in January / Average sunshine in January - Carlsbad, CA
  • Average daylight in January: 10h and 2min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in January: 6h and 5min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

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Average sunshine days in January
Carlsbad, CA

Average sunshine days in January - Carlsbad, CA
  • Average sunshine days in January: 23.8 days

The month with the most sunshine days is October (24.2 days).
The month with the least sunshine days is February (20 days).

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Average UV index in January
Carlsbad, CA

Average UV index in January - Carlsbad, CA
  • Average UV index in January: 4

The months with the highest UV index are July, August and September (UV index 6).
The 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
Carlsbad, CA

Average cloud cover in January - Carlsbad, CA
  • Average cloud cover in January: 22

The month with the most cloud cover is December (Cloud cover 25).
The month with the least cloud cover is August (Cloud cover 8).

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Average visibility in January
Carlsbad, CA

Average visibility in January - Carlsbad, 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).

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Carlsbad, California, USA

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