UV Index in Fairfax, Virginia, United States

· America/New York

4.0
Moderate · clear-sky maximum Tuesday, October 20, 2026

At solar noon (12:54:04 PM) the sun reaches 40.7° above the horizon in Fairfax. Without clouds, that corresponds to a maximum UV index of about 4.0 (moderate). Clouds usually lower the real value; snow, sand, water and altitude can raise it.

☀️ Sun Safety: When the UV index is high, protect yourself with sunscreen, shade, and a hat. Values of 6 or more indicate increased sunburn risk!

UV index in Fairfax, next 14 days

DateSun at noonClear-sky maxForecast max
40.7° 4.0 Moderate —
40.3° 3.9 Moderate —
39.9° 3.9 Moderate —
39.6° 3.8 Moderate —
39.2° 3.7 Moderate —
38.9° 3.7 Moderate —
38.6° 3.6 Moderate —
38.2° 3.5 Moderate —
37.9° 3.5 Moderate —
37.6° 3.4 Moderate —
37.2° 3.3 Moderate —
36.9° 3.3 Moderate —
36.6° 3.2 Moderate —
36.3° 3.2 Moderate —

Clear-sky values are calculated from the sun's height at solar noon (cloud-free sky, average ozone). Forecast values from Open-Meteo include clouds and load in your browser.

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The UV index in Fairfax measures the intensity of ultraviolet radiation reaching the ground. Values below 3 are considered low risk, while 6 and above require sun protection such as sunscreen, sunglasses, and shade. The clear-sky value shows how strong the sun can get on each day; the forecast shows what is expected with clouds. See today's sunrise and sunset times for Fairfax or discover the best light for photos during the golden hour in Fairfax.

About Fairfax

Fairfax is an independent city located in the state of Virginia, United States. Covering an area of 16.3 square kilometres at an elevation of 95 metres, the city has existed as a municipality since 1805. According to the 2020 census, the population was 24,146 residents. The city is home to George Mason University, which serves as a major feature of the area. Other notable sites within the city include the National Firearms Museum and Virginia International University. The local landscape is further defined by the presence of the Daniels Run river.

AI-assisted description based on geographic data and editorial notes.