July Weather in Merrillan, United States

Last updated: June 24, 2025

The average temperature in Merrillan, United States during July is a pleasant 22°C (73°F). Expect temperatures to range from a cool 12°C (54°F) to a warm 33°C (91°F). Prepare for some rain, as the area experiences an average precipitation of 112 mm (4.4 in) over 10 days. With an average humidity of 80%, it’s a perfect time to enjoy the lush surroundings!

July Temperature in Merrillan

In July in Merrillan, the average temperature is 22°C (73°F), with maximums reaching up to 33°C (91°F) and minimums dropping as low as 12°C (54°F). This pleasant climate makes it an ideal time for travel and outdoor activities.

July Weather in Merrillan: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Merrillan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Merrillan, July typically has an average temperature of 22°C (73°F), with highs reaching up to 33°C (91°F) and lows dropping to around 12°C (54°F).

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

July Precipitation in Merrillan

In Merrillan in July, the total precipitation amount is 112 mm (4.4 in) over the course of 10 days.

July Precipitation Trends in Merrillan

The chart displays monthly precipitation patterns in Merrillan, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Merrillan, July typically receives around 112 mm (4.4 inches) of precipitation spread over approximately 10 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Merrillan

In Merrillan in July, humidity is 80%. With an average temperature of 22°C (73°F), this humidity feels like a warm blanket enveloping you, making travel feel a bit sluggish and sticky, yet the vibrant atmosphere invites exploration at a slower pace.

July Average Humidity in Merrillan

This chart illustrates the average monthly humidity levels in Merrillan, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Merrillan is approximately 80%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Merrillan

In Merrillan in July, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Merrillan.

Maximum UV Index Levels in Merrillan for July

The chart shows the monthly maximum UV Index (UVI) for Merrillan in July, 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 July, the maximum UV index in Merrillan typically reaches 10, which falls under the very high exposure category.

Data source: Merrillan July 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 July Weather in Merrillan Compares to Other Months

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

This table compares monthly weather conditions in Merrillan, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (18°F)	33 mm (1.3 inches)	88%	low
February Weather	-7°C (19°F)	52 mm (2.1 inches)	89%	moderate
March Weather	1°C (34°F)	56 mm (2.2 inches)	86%	moderate
April Weather	6°C (44°F)	95 mm (3.8 inches)	85%	very high
May Weather	15°C (58°F)	130 mm (5.1 inches)	79%	very high
June Weather	20°C (69°F)	135 mm (5.3 inches)	80%	very high
July Weather	22°C (73°F)	112 mm (4.4 inches)	80%	very high
August Weather	20°C (69°F)	136 mm (5.4 inches)	78%	very high
September Weather	17°C (63°F)	97 mm (3.8 inches)	80%	high
October Weather	9°C (49°F)	119 mm (4.7 inches)	84%	moderate
November Weather	1°C (34°F)	53 mm (2.1 inches)	89%	moderate
December Weather	-4°C (25°F)	50 mm (2.0 inches)	85%	low