June Weather in Fairfax, United States

Last updated: June 24, 2025

In June, the average temperature in Fairfax, United States hovers around 26°C (79°F), with minimums dipping to 13°C (55°F) and peaks reaching up to 37°C (99°F). Visitors should be prepared for some rainfall, as precipitation averages 101 mm (4.0 in) over approximately 6 days. The air tends to feel quite moist, with an average humidity level of 83%, adding to the overall tropical ambiance.

June Temperature in Fairfax

In June in Fairfax, the average temperature is 26°C (79°F). The maximum can reach 37°C (99°F), while the minimum can be as low as 13°C (55°F). This temperature range makes Fairfax an ideal destination for travelers looking to enjoy warm weather while still having comfortable cooler evenings.

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 37°C (99°F) and lows dropping to around 13°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 precipitation amount is 101 mm (4.0 in) over the course of 6 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 101 mm (4.0 inches) of precipitation spread over approximately 6 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

June Humidity in Fairfax

In Fairfax in June, humidity is 83%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket enveloping you, making travel an exercise in endurance as the air clings to your skin and saps your energy.

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 83%, 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	3°C (38°F)	57 mm (2.3 inches)	77%	moderate
February Weather	4°C (39°F)	43 mm (1.7 inches)	76%	high
March Weather	11°C (52°F)	97 mm (3.8 inches)	71%	high
April Weather	15°C (59°F)	104 mm (4.1 inches)	73%	very high
May Weather	20°C (69°F)	160 mm (6.3 inches)	83%	very high
June Weather	26°C (79°F)	101 mm (4.0 inches)	83%	extreme
July Weather	28°C (82°F)	80 mm (3.2 inches)	81%	extreme
August Weather	27°C (80°F)	103 mm (4.1 inches)	73%	very high
September Weather	24°C (76°F)	88 mm (3.4 inches)	67%	very high
October Weather	16°C (61°F)	121 mm (4.8 inches)	72%	high
November Weather	9°C (49°F)	34 mm (1.3 inches)	82%	moderate
December Weather	6°C (43°F)	35 mm (1.4 inches)	85%	moderate