Merrifield Weather in September

Merrifield in September sees high temperatures, with highs around 26°C (79°F) and overnight lows of 16°C (61°F). Rainfall is fairly high at around 121 mm (4.8 in) on average, so pack waterproofs just in case.

Rainfall in Merrifield in September

This month experiences about 9 days of rain according to historical data, averaging 121 mm (4.8 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Merrifield in September

Daytime highs in Merrifield in September reach 26°C (79°F), with nights around 16°C (61°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights drop to around 16°C (61°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Merrifield in September

The days are predominantly sunny, with an estimated total of around 225 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

Wind Speed in Merrifield in September

September sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.

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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 Merrifield's climate page.

Merrifield Temperature in September

Min Temperature 16°C (61°F)  

Max Temperature 26°C (79°F)  

Chance of Rain 30%  

Precipitation 121 mm (4.8 in)  

Rainy days 9 days  

Humidity 68% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 225 hours *  

Percentage Sunshine 60% *  

* Data from: Washington DC, the United States of America (17 KM, 10 Miles).

What to Wear in Merrifield in September

Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Merrifield in September

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

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

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 Merrifield's climate page.

More climate data for Merrifield

Temperature Rainfall Sunshine Humidity Wind Speed

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