June Weather in Fairfax, United States

Last updated: June 24, 2025

In June, the average temperature in Fairfax, United States is a pleasant 23°C (73°F). While the mercury can dip as low as 9°C (49°F), it can also soar to a scorching 35°C (96°F). Expect about 134 mm (5.3 in) of precipitation over 10 days, contributing to a humid atmosphere with an average humidity level of 81%.

June Temperature in Fairfax

In June in Fairfax, the average temperature is 23°C (73°F). The maximum can reach 35°C (96°F) and the minimum can be as low as 9°C (49°F). This makes it a comfortable time to visit, with warm days perfect for outdoor activities and cooler evenings ideal for exploring local dining options.

June Weather in Fairfax: Daily Temperature Highs, Lows, and Averages

The chart illustrates June temperature patterns in Fairfax, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fairfax, June typically has an average temperature of 23°C (73°F), with highs reaching up to 35°C (96°F) and lows dropping to around 9°C (49°F).

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

June Precipitation in Fairfax

In Fairfax in June, the total precipitation amount reaches 134 mm (5.3 in) over a span of 10 days.

June Precipitation Trends in Fairfax

The chart displays monthly precipitation patterns in Fairfax, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Fairfax, June typically receives around 134 mm (5.3 inches) of precipitation spread over approximately 10 days.

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

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Millimeters (mm) Inches (in)

June Humidity in Fairfax

In Fairfax in June, humidity is 81%. With an average temperature of 23°C (73°F), this humidity feels like a heavy blanket wrapping around you, making every step feel more laborious while traveling and causing you to constantly seek out shade or a cool breeze for relief.

June Average Humidity in Fairfax

This chart illustrates the average monthly humidity levels in Fairfax, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Fairfax is approximately 81%, offering insight into how humid the weather typically is during this month.

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

June UV Index in Fairfax

In Fairfax in June, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Fairfax.

Maximum UV Index Levels in Fairfax for June

The chart shows the monthly maximum UV Index (UVI) for Fairfax in June, 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 June, the maximum UV index in Fairfax typically reaches 11, which falls under the extreme exposure category.

Data source: Fairfax June 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 June Weather in Fairfax Compares to Other Months

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

This table compares monthly weather conditions in Fairfax, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	47 mm (1.9 inches)	81%	moderate
February Weather	-5°C (23°F)	56 mm (2.2 inches)	81%	moderate
March Weather	3°C (38°F)	73 mm (2.9 inches)	81%	high
April Weather	9°C (48°F)	81 mm (3.2 inches)	82%	very high
May Weather	16°C (62°F)	160 mm (6.3 inches)	78%	very high
June Weather	23°C (73°F)	134 mm (5.3 inches)	81%	extreme
July Weather	24°C (76°F)	85 mm (3.3 inches)	79%	very high
August Weather	22°C (73°F)	77 mm (3.0 inches)	77%	very high
September Weather	19°C (67°F)	127 mm (5.0 inches)	78%	very high
October Weather	11°C (53°F)	140 mm (5.5 inches)	78%	high
November Weather	3°C (38°F)	47 mm (1.9 inches)	87%	moderate
December Weather	-1°C (30°F)	44 mm (1.7 inches)	84%	moderate