June Weather in Fairfax, United States

Last updated: June 24, 2025

In June, the average temperature in Fairfax, United States is a warm 26°C (79°F). Expect variations, with minimums dipping to 12°C (55°F) and maximums soaring up to 38°C (101°F). Alongside the warmth, 121 mm (4.8 in) of precipitation is likely, falling over 16 days. With an average humidity of 75%, the air may feel quite sticky, making hydration essential for outdoor activities!

June Temperature in Fairfax

In June in Fairfax, the average temperature is 26°C (79°F). Maximums can reach 38°C (101°F), while minimums can dip as low as 12°C (55°F). It's advisable to pack light clothing for the daytime and a light jacket for the cooler evenings while traveling.

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 26°C (79°F), with highs reaching up to 38°C (101°F) and lows dropping to around 12°C (55°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 is 121 mm (4.8 in) spread over 16 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 121 mm (4.8 inches) of precipitation spread over approximately 16 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 75%. With an average temperature of 26°C (79°F), this humidity feels like a warm blanket wrapped around you, making traveling a sticky experience where every step requires extra effort and frequent breaks to cool off.

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 75%, 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	10°C (50°F)	81 mm (3.2 inches)	86%	moderate
February Weather	13°C (56°F)	104 mm (4.1 inches)	81%	high
March Weather	16°C (60°F)	73 mm (2.9 inches)	81%	very high
April Weather	19°C (66°F)	119 mm (4.7 inches)	79%	very high
May Weather	24°C (75°F)	94 mm (3.7 inches)	75%	extreme
June Weather	26°C (79°F)	121 mm (4.8 inches)	75%	extreme
July Weather	28°C (82°F)	143 mm (5.6 inches)	80%	extreme
August Weather	27°C (81°F)	142 mm (5.6 inches)	81%	extreme
September Weather	26°C (78°F)	85 mm (3.3 inches)	83%	very high
October Weather	21°C (71°F)	72 mm (2.8 inches)	78%	very high
November Weather	14°C (57°F)	63 mm (2.5 inches)	85%	high
December Weather	11°C (53°F)	126 mm (5.0 inches)	87%	moderate