August Weather in Irwindale, United States

Last updated: June 24, 2025

In August, the average temperature in Irwindale, United States is a comfortable 25°C (76°F). While you might experience a refreshing low of 16°C (61°F), be prepared for the occasional spike, with highs reaching up to 39°C (102°F). Expect minimal rainfall, with only 2 mm (0.1 in) over the course of 0 days, and enjoy a reasonably humid atmosphere with an average humidity of 69%.

August Temperature in Irwindale

In August in Irwindale, the average temperature is 25°C (76°F). Maximum can reach 39°C (102°F) and minimum can be as low as 16°C (61°F). This mix of warm days and cooler nights makes it an ideal time for travelers to explore and enjoy outdoor activities.

August Weather in Irwindale: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Irwindale, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Irwindale, August typically has an average temperature of 25°C (76°F), with highs reaching up to 39°C (102°F) and lows dropping to around 16°C (61°F).

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

August Precipitation in Irwindale

In Irwindale in August, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

August Precipitation Trends in Irwindale

The chart displays monthly precipitation patterns in Irwindale, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Irwindale, August typically receives around 2 mm (0.1 inches) of precipitation spread over approximately 0 days.

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

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Millimeters (mm) Inches (in)

August Humidity in Irwindale

In Irwindale in August, humidity is 69%. With an average temperature of 25°C (76°F), this humidity feels like a warm, tropical embrace, making travel invigorating yet slightly sticky—perfect for leisurely strolls but requiring frequent breaks to enjoy refreshing drinks.

August Average Humidity in Irwindale

This chart illustrates the average monthly humidity levels in Irwindale, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Irwindale is approximately 69%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Irwindale

In Irwindale in August, 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 Irwindale.

Maximum UV Index Levels in Irwindale for August

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

Data source: Irwindale August 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 August Weather in Irwindale Compares to Other Months

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

This table compares monthly weather conditions in Irwindale, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (56°F)	75 mm (3.0 inches)	74%	moderate
February Weather	13°C (56°F)	63 mm (2.5 inches)	79%	high
March Weather	14°C (58°F)	67 mm (2.7 inches)	75%	very high
April Weather	17°C (63°F)	23 mm (0.9 inches)	70%	very high
May Weather	18°C (65°F)	16 mm (0.6 inches)	70%	very high
June Weather	21°C (70°F)	3 mm (0.1 inches)	72%	extreme
July Weather	24°C (76°F)	2 mm (0.1 inches)	73%	extreme
August Weather	25°C (76°F)	2 mm (0.1 inches)	69%	very high
September Weather	23°C (74°F)	4 mm (0.1 inches)	68%	very high
October Weather	20°C (69°F)	10 mm (0.4 inches)	67%	high
November Weather	17°C (62°F)	20 mm (0.8 inches)	68%	moderate
December Weather	13°C (56°F)	72 mm (2.8 inches)	71%	moderate