January Weather in Grover Beach, United States

Last updated: June 24, 2025

In Grover Beach, United States, the average temperature in January is a comfortable 12°C (54°F). During this time, temperatures can range from a cool 4°C (39°F) to a warm 24°C (75°F). Expect about 100 mm (3.9 in) of precipitation spread over 7 days, with an average humidity of 80%, creating a lush and vibrant atmosphere.

January Temperature in Grover Beach

In January in Grover Beach, the average temperature is 12°C (54°F). Maximum temperatures can reach 24°C (75°F), while minimums can drop as low as 4°C (39°F). This pleasant and mild climate makes Grover Beach a great destination for travelers looking to enjoy outdoor activities and sightseeing.

January Weather in Grover Beach: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Grover Beach, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grover Beach, January typically has an average temperature of 12°C (54°F), with highs reaching up to 24°C (75°F) and lows dropping to around 4°C (39°F).

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

January Precipitation in Grover Beach

In Grover Beach in January, the precipitation amount is 100 mm (3.9 in) over a span of 7 days.

January Precipitation Trends in Grover Beach

The chart displays monthly precipitation patterns in Grover Beach, 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 Grover Beach, January typically receives around 100 mm (3.9 inches) of precipitation spread over approximately 7 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Grover Beach

In Grover Beach in January, humidity is 80%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket that wraps around you, making it feel much cooler and damp. Traveling in these conditions might leave you feeling chilly and slightly uncomfortable, as the moisture in the air clings to your skin and clothes, turning each step into a soggy endeavor.

January Average Humidity in Grover Beach

This chart illustrates the average monthly humidity levels in Grover Beach, 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 Grover Beach is approximately 80%, 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 Grover Beach

In Grover Beach 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 Grover Beach for better planning.

Maximum UV Index Levels in Grover Beach for January

The chart shows the monthly maximum UV Index (UVI) for Grover Beach 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 Grover Beach typically reaches 4, which falls under the moderate exposure category.

Data source: Grover Beach 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 Grover Beach Compares to Other Months

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

This table compares monthly weather conditions in Grover Beach, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	100 mm (3.9 inches)	80%	moderate
February Weather	12°C (53°F)	81 mm (3.2 inches)	83%	high
March Weather	12°C (54°F)	88 mm (3.5 inches)	80%	very high
April Weather	13°C (57°F)	24 mm (1.0 inches)	76%	very high
May Weather	14°C (58°F)	12 mm (0.5 inches)	75%	extreme
June Weather	16°C (61°F)	2 mm (0.1 inches)	74%	extreme
July Weather	18°C (64°F)	1 mm (0.0 inches)	75%	extreme
August Weather	18°C (65°F)	1 mm (0.0 inches)	72%	extreme
September Weather	18°C (64°F)	1 mm (0.1 inches)	70%	very high
October Weather	17°C (63°F)	10 mm (0.4 inches)	70%	high
November Weather	14°C (58°F)	33 mm (1.3 inches)	74%	moderate
December Weather	12°C (54°F)	72 mm (2.8 inches)	76%	moderate