June Weather in Fairfax, United States

Last updated: June 24, 2025

In June, the average temperature in Fairfax, United States hovers around 22°C (72°F). Expect a minimum of 7°C (45°F) and a sweltering maximum of 38°C (102°F). With an average humidity of 80%, the atmosphere can feel quite sticky. Be prepared for 106 mm (4.2 in) of rainfall over approximately 11 days during the month.

June Temperature in Fairfax

In June in Fairfax, the average temperature is 22°C (72°F). The maximum can reach 38°C (102°F), while the minimum can drop to as low as 7°C (45°F). Overall, visitors to Fairfax during this month should prepare for a mix of warm days and cooler nights.

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 22°C (72°F), with highs reaching up to 38°C (102°F) and lows dropping to around 7°C (45°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 106 mm (4.2 in) spread over a duration of 11 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 106 mm (4.2 inches) of precipitation spread over approximately 11 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 80%. With an average temperature of 22°C (72°F), this humidity feels like a warm, enveloping blanket that can quickly sap your energy while traveling, making you feel sticky and uncomfortable if you're not prepared.

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 80%, 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 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 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 10, which falls under the very high 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	-9°C (16°F)	26 mm (1.0 inches)	87%	moderate
February Weather	-9°C (16°F)	27 mm (1.1 inches)	90%	moderate
March Weather	0°C (33°F)	62 mm (2.5 inches)	85%	moderate
April Weather	6°C (43°F)	80 mm (3.1 inches)	84%	very high
May Weather	15°C (60°F)	124 mm (4.9 inches)	78%	very high
June Weather	22°C (72°F)	106 mm (4.2 inches)	80%	very high
July Weather	23°C (74°F)	123 mm (4.8 inches)	81%	very high
August Weather	21°C (71°F)	124 mm (4.9 inches)	81%	very high
September Weather	18°C (65°F)	118 mm (4.6 inches)	81%	very high
October Weather	9°C (48°F)	97 mm (3.8 inches)	84%	moderate
November Weather	1°C (34°F)	30 mm (1.2 inches)	88%	moderate
December Weather	-4°C (24°F)	40 mm (1.6 inches)	84%	low