Fairfax Weather in May

With daytime temperatures of 23°C (73°F) and nighttime lows of 12°C (54°F), May in Fairfax brings high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 125 mm (4.9 in) falls on average.

Rainfall in Fairfax in May

You can typically expect 13 days of rain this month, averaging around 125 mm (4.9 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Fairfax in May

Fairfax in May gets highs of 23°C (73°F) during the day and drops to 12°C (54°F) at night. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. 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 Fairfax in May

The month enjoys around 259 hours of sunshine, creating mostly sunny days with good weather conditions.

Wind Speed in Fairfax in May

Wind speeds average 4 m/s (8 knots) during May. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

If you prefer dry days with pleasant temperatures, August typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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For a detailed overview over the year and the best time to visit the United States of America, check out our Fairfax's climate page.

Fairfax Temperature in May

Min Temperature 12°C (54°F)  

Max Temperature 23°C (73°F)  

Chance of Rain 43%  

Precipitation 125 mm (4.9 in)  

Rainy days 13 days  

Humidity 64% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 259 hours *  

Percentage Sunshine 59% *  

* Data from: Washington DC, the United States of America (23 KM, 14 Miles).

What to Wear in Fairfax in May

Pleasant temperatures in May mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Fairfax in May

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

9/10

Walking

9/10

Camping

6/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Fairfax's climate page.

More climate data for Fairfax

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Fairfax climate overview or explore weather in the United States of America.