January weather forecast and climate
Martinez, CA

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 another mild winter month in Martinez, California, with average temperature fluctuating between 42.3°F (5.7°C) and 56.7°F (13.7°C).

Temperature

In January, the average high-temperature is almost the same as in December - a still moderate 56.7°F (13.7°C). In January, in Martinez, the average low-temperature is 42.3°F (5.7°C).

Humidity

The average relative humidity in Martinez, California, 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, in Martinez, 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 9.9h.

Sunshine

In Martinez, the average sunshine is 5.9h.

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Martinez. A UV Index value of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 Martinez?

In January, the average high-temperature is 56.7°F (13.7°C), and the average low-temperature is 42.3°F (5.7°C).

What is the average humidity in January in Martinez?

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

How many days does it rain in January in Martinez?

In January, in Martinez, California, the rain falls for 7 days. Throughout January, 0.79" (20mm) of precipitation is accumulated.

How many hours of daylight does Martinez have in January?

The average length of the day in January in Martinez is 9.9h.

How long on average sun shines in January in Martinez?

In January, the average sunshine in Martinez, California, is 5.9h.

When is the lowest UV index in Martinez?

Months with the lowest UV index in Martinez, California, are January, February, November and December, with an average maximum UV index of 3.

What is the UV index reading in January in Martinez?

In Martinez, California, the average daily maximum UV index in January is 3. A UV Index of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV rays.

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"

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

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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%).
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: 9.9h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in January: 5.9h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 5.7h).

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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).
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

Months with the highest UV index are June, July and August (UV index 6).
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

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

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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