January weather forecast
Monterey, CA

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The rugged mountainous coast of Big Sur in Monterey, California
The rugged mountainous coast of Big Sur in Monterey, California

Weather in January

January in Monterey, California, greets residents and visitors alike with moderately cool temperatures. Highs typically hover around 59°F (15°C), the lower end of the city's annual temperature range, while rainfall peaks at 1.89" (48mm) over 9.3 days. Driven by Pacific storms during the peak of California's wet season, this period is marked by moderate rainfall and relative humidity of 71%. Despite these conditions, it's important to remember that the city enjoys 6.4 hours of sunlight each day during this month. The weather in January sets the stage for the winter weather experience in Monterey: comfortably cold temperatures, a fair amount of rain, and fewer sunshine hours.

Temperature

January begins with an average high-temperature of a still moderate 59°F (15°C), reflecting close similarity to the preceding month. In January, Monterey records an average nighttime temperature of 46.4°F (8°C).

Humidity

In Monterey, the average relative humidity in January is 71%.

Rainfall

In Monterey, in January, it is raining for 9.3 days, with typically 1.89" (48mm) of accumulated precipitation. In Monterey, during the entire year, the rain falls for 73.6 days and collects up to 11.77" (299mm) of precipitation.

Ocean temperature

In Monterey, in January, the average water temperature is 54.1°F (12.3°C).
Note: In 54.1°F (12.3°C), even brief exposure to 55.4°F (13°C) feels biting, and anything less than 50°F (10°C) risks cold shock and impaired breathing, considering one's health.

Daylight

The average length of the day in January is 10h and 0min.
On the first day of January in Monterey, sunrise is at 7:19 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 5:31 pm PST.

Sunshine

The average sunshine in January is 6.4h.

UV index

In January, the average daily maximum UV index in Monterey is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.
Note: In January, the maximum UV index of 4 translates into these guidelines:
Ensure safety - Recommendations to avert sunburn are presented. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
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Frequently asked questions

What are January temperatures in Monterey?

The high-temperature in Monterey during January is 59°F (15°C) and the low-temperature is 46.4°F (8°C).

What is the average humidity in January in Monterey?

The average relative humidity in January is 71%.

How many days does it rain in January in Monterey?

In Monterey, during January, the rain falls for 9.3 days and regularly aggregates up to 1.89" (48mm) of precipitation.

What is the water temperature in January in Monterey?

In Monterey, in January, the average water temperature is 54.1°F (12.3°C). Swimming in 54.1°F (12.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in January in Monterey?

In January, the average day length in Monterey is 10h and 0min.

What time are sunrise and sunset in January in Monterey?

In January, on the first day of the month, sunrise is at 7:19 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 5:31 pm PST.

How long on average sun shines in January in Monterey?

In January, the average sunshine duration in Monterey, California, is 6.4h.

What is the UV index reading in January in Monterey?

The average daily maximum UV index in January is 4. A UV Index value of 3 to 5 symbolizes a medium health risk 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
Monterey, CA

Average temperature in January - Monterey, CA
  • Average high temperature in January: 59°F

The warmest month (with the highest average high temperature) is September (72.5°F).
The month with the lowest average high temperature is December (57.2°F).

  • Average low temperature in January: 46.4°F

The months with the highest average low temperature are August and September (55.2°F).
The coldest month (with the lowest average low temperature) is February (46°F).

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Average pressure in January
Monterey, CA

Average pressure in January - Monterey, 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).

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Average wind speed in January
Monterey, CA

Average wind speed in January - Monterey, CA
  • Average wind speed in January: 6.2mph

The windiest months (with the highest average wind speed) are April and May (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

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Average humidity in January
Monterey, CA

Average humidity in January - Monterey, CA
  • Average humidity in January: 71%

The months with the highest relative humidity are March and May (76%).
The month with the lowest relative humidity is November (68%).

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Average rainfall in January
Monterey, CA

Average rainfall in January - Monterey, CA
  • Average rainfall in January: 1.89"

The wettest month (with the highest rainfall) is December (2.4").
The driest months (with the least rainfall) are July and August (0.08").

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Average rainfall days in January
Monterey, CA

Average rainfall days in January - Monterey, CA
  • Average rainfall days in January: 9.3 days

The month with the highest number of rainy days is March (12.5 days).
The month with the least rainy days is August (1.1 days).

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Average sea temperature in January
Monterey, CA

Average sea temperature in January - Monterey, 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).

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

Average daylight in January / Average sunshine in January - Monterey, CA
  • Average daylight in January: 10h and 0min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in January: 6h and 2min

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

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Average sunshine days in January
Monterey, CA

Average sunshine days in January - Monterey, CA
  • Average sunshine days in January: 20.3 days

The month with the most sunshine days is July (27.3 days).
The month with the least sunshine days is March (16.8 days).

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Average UV index in January
Monterey, CA

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

The months with the highest UV index are June, July, August and September (UV index 5).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in January
Monterey, CA

Average cloud cover in January - Monterey, CA
  • Average cloud cover in January: 29

The month with the most cloud cover is March (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 9).

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Average visibility in January
Monterey, CA

Average visibility in January - Monterey, 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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Monterey, California, USA

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