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

The advent of January sees the average high-temperature at a still comfortable 64°F (17.8°C), subtly shifted from December's 62.4°F (16.9°C). Nighttime temperature lowers to an average of 50.7°F (10.4°C) in January.

Humidity

The average relative humidity in January in Carlsbad is 61%.

Rainfall

In Carlsbad, in January, during 6 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. In Carlsbad, California, during the entire year, the rain falls for 68.2 days and collects up to 9.49" (241mm) of precipitation.

Ocean temperature

January and February, with an average ocean temperature of 58.6°F (14.8°C), are months with the coldest seawater in Carlsbad.
Note: One needs to be cautious in 58.6°F (14.8°C) waters. 55.4°F (13°C) is already forbidding, but sub14°F (-10°C) can seriously disrupt your breathing and lead to a frigid shock, considering one's well-being.

Daylight

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

Sunshine

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 reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 4 during January translates into these guidelines:
Ensure safety - Imperative it is to shield skin and eyes from damage. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Updated: Jul 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Carlsbad in January?

During January, Carlsbad experiences an average high-temperature of 64°F (17.8°C) and a low-temperature of 50.7°F (10.4°C).

What is the average humidity in January?

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

How much does it rain in Carlsbad in January?

In Carlsbad, in January, it is raining for 6 days, with typically 1.26" (32mm) of accumulated precipitation.

When is the ocean coldest?

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

What is the water temperature in January?

In January, the average ocean temperature is 58.6°F (14.8°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

How many hours of daylight does Carlsbad have in January?

The average day length in January is 10h and 16min.

When is the sunrise / sunset in January?

In January, on the first day of the month, 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 long on average sun shines in January?

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

What are the months with the lowest UV index?

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

What is the UV index reading in January?

In Carlsbad, the average daily maximum UV index in January is 4. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to Sun's UV rays.
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).

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).

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).

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%).

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").

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).

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).

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).

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).

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).

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).

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).

Carlsbad, California, USA

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