January Weather in Martinez, United States

Last updated: June 24, 2025

In January, the average temperature in Martinez, United States hovers around 9°C (49°F). Expect a wide range of temperatures, with the minimum dipping to -7°C (19°F) and the maximum soaring to 26°C (79°F). Be prepared for rainfall, as the region experiences about 84 mm (3.3 in) of precipitation over 8 days, coupled with an average humidity of 86%.

January Temperature in Martinez

In January in Martinez, the average temperature is 9°C (49°F), with maximums reaching up to 26°C (79°F) and minimums dropping as low as -7°C (19°F). Travelers should be prepared for a range of temperatures, so dressing in layers is advisable.

January Weather in Martinez: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Martinez, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Martinez, January typically has an average temperature of 9°C (49°F), with highs reaching up to 26°C (79°F) and lows dropping to around -7°C (19°F).

Data source: Temperature data for Martinez generated using information from the Copernicus Climate Change Service.

January Precipitation in Martinez

In Martinez in January, the precipitation amount is 84 mm (3.3 in) spread over 8 days.

January Precipitation Trends in Martinez

The chart displays monthly precipitation patterns in Martinez, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Martinez, January typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Martinez

In Martinez in January, humidity is 86%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill in the air, making travel uncomfortable as the moisture clings to your skin and thickens the atmosphere, creating a sense of heaviness that can tire you quickly.

January Average Humidity in Martinez

This chart illustrates the average monthly humidity levels in Martinez, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Martinez is approximately 86%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Martinez

In Martinez in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Martinez for better planning.

Maximum UV Index Levels in Martinez for January

The chart shows the monthly maximum UV Index (UVI) for Martinez in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Martinez typically reaches 4, which falls under the moderate exposure category.

Data source: Martinez January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Martinez Compares to Other Months

Weather in Martinez varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Martinez, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Martinez, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	84 mm (3.3 inches)	86%	moderate
February Weather	12°C (54°F)	117 mm (4.6 inches)	81%	high
March Weather	15°C (59°F)	85 mm (3.3 inches)	81%	very high
April Weather	19°C (66°F)	108 mm (4.2 inches)	79%	very high
May Weather	23°C (74°F)	102 mm (4.0 inches)	75%	extreme
June Weather	26°C (79°F)	106 mm (4.2 inches)	75%	extreme
July Weather	28°C (82°F)	122 mm (4.8 inches)	80%	extreme
August Weather	27°C (81°F)	130 mm (5.1 inches)	81%	very high
September Weather	25°C (78°F)	80 mm (3.1 inches)	83%	very high
October Weather	21°C (69°F)	88 mm (3.5 inches)	78%	very high
November Weather	13°C (55°F)	64 mm (2.5 inches)	85%	high
December Weather	11°C (51°F)	117 mm (4.6 inches)	87%	moderate