January weather forecast
Martinez, CA

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A cow grazing in the vast Martinez Hills
A cow grazing in the vast Martinez Hills' fields near Martinez Town, California

Weather in January

January, like December, is a moderate winter month in Martinez, California, with an average temperature varying between 56.7°F (13.7°C) and 42.3°F (5.7°C).

Temperature

The advent of January denotes an average high-temperature of a still moderate 56.7°F (13.7°C), subtly different from December's 55.4°F (13°C). Throughout January in Martinez, a steady low-temperature average of 42.3°F (5.7°C) is noted.

Humidity

The average relative humidity in January in Martinez is 73%.

Rainfall

In Martinez, during January, the rain falls for 7 days and regularly aggregates up to 0.79" (20mm) of precipitation. Throughout the year, there are 48.9 rainfall days, and 4.96" (126mm) of precipitation is accumulated.

Daylight

In Martinez, the average length of the day in January is 9h and 53min.
On the first day of January, sunrise is at 7:24 am and sunset at 4:59 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 5:30 pm PST.

Sunshine

The average sunshine in January in Martinez is 5.9h.

UV index

The months with the lowest UV index in Martinez are January, February, November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In January, the maximum UV index of 3 translates into these guidelines:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
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Frequently asked questions

What is the usual temperature for Martinez in January?

The high-temperature, in January, in Martinez, records 56.7°F (13.7°C), while the low-temperature is 42.3°F (5.7°C).

What is the average humidity in January in Martinez?

In Martinez, the average relative humidity in January is 73%.

How much does it rain in Martinez in January?

In Martinez, California, in January, it is raining for 7 days, with typically 0.79" (20mm) of accumulated precipitation.

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

The average day length in January in Martinez, California, is 9h and 53min.

When are sunrise and sunset in January in Martinez?

In January, on the first day of the month, sunrise is at 7:24 am and sunset at 4:59 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 5:30 pm PST.

How many hours of sunshine does Martinez have in January?

In January, the average sunshine duration is 5.9h.

What are the months with the lowest UV index in Martinez?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3.

How high is the UV index in January in Martinez?

In January, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability 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
Martinez, CA

Average temperature in January - Martinez, CA
  • Average high temperature in January: 56.7°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is December (55.4°F).

  • Average low temperature in January: 42.3°F

The month with the highest average low temperature is September (57.6°F).
The coldest months (with the lowest average low temperature) are January and December (42.3°F).

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Average pressure in January
Martinez, CA

Average pressure in January - Martinez, CA
  • Average pressure in January: 30.14"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in January
Martinez, CA

Average wind speed in January - Martinez, CA
  • Average wind speed in January: 4.6mph

The windiest month (with the highest average wind speed) is May (7.4mph).
The calmest month (with the lowest average wind speed) is November (4.5mph).

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Average humidity in January
Martinez, CA

Average humidity in January - Martinez, CA
  • Average humidity in January: 73%

The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are September and October (56%).

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Average rainfall in January
Martinez, CA

Average rainfall in January - Martinez, CA
  • Average rainfall in January: 0.79"

The wettest month (with the highest rainfall) is February (0.98").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in January
Martinez, CA

Average rainfall days in January - Martinez, CA
  • Average rainfall days in January: 7 days

The month with the highest number of rainy days is March (8.3 days).
The month with the least rainy days is August (1 days).

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

Average daylight in January / Average sunshine in January - Martinez, CA
  • Average daylight in January: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in January: 5h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days in January
Martinez, CA

Average sunshine days in January - Martinez, CA
  • Average sunshine days in January: 23.1 days

The month with the most sunshine days is July (29 days).
The months with the least sunshine days are February and March (22.1 days).

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Average UV index in January
Martinez, CA

Average UV index in January - Martinez, CA
  • Average UV index in January: 3

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in January
Martinez, CA

Average cloud cover in January - Martinez, CA
  • Average cloud cover in January: 35

The months with the most cloud cover are March and December (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 7).

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Average visibility in January
Martinez, CA

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

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