Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
Herndon Weather in May
In Herndon, May brings high daytime temperatures around 24°C (75°F), with nights cooling to 12°C (54°F). Expect quite a bit of rainfall this month.
Rainfall in Herndon in May
You can expect rain on around 15 days based on historical patterns, with 130 mm (5.1 in) average for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Herndon in May
In May, Herndon gets high temperatures, with highs of 24°C (75°F). Nights cool to around 12°C (54°F). Overall, the month follows a fairly predictable daily temperature pattern. With lows of 12°C (54°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.
Sunshine in Herndon in May
With approximately 259 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.If you're inclined towards comfortable temperatures and drier conditions, May is a good time to visit Herndon.
Herndon Temperature in May
Min Temperature
12°C (54°F)
Max Temperature
24°C (75°F)
Chance of Rain
48%
Precipitation
130 mm (5.1 in)
Rainy days
15 days
Humidity
64% *
Sunshine
259 hours *
Percentage Sunshine
59% *
* Data from: Washington DC, the United States of America (33 KM, 20 Miles).
Herndon Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Herndon - and find the best time to visit.
Best Places in the United States of America in May
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in May →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Herndon in May
Comfortable temperatures call for an easy wardrobe in May. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Herndon in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming9/10 -
Cycling9/10 -
Walking9/10 -
Camping6/10 -
Outdoor sports9/10
Herndon 3-Day Forecast
More climate data for Herndon
Temperature Rainfall Sunshine Humidity
See the full Herndon climate overview or explore weather in the United States of America.
Popular in May
Where to go in May - average daytime high across popular destinations.
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Yosemite National Park is definitely worth a visit
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