Sterling Weather in September

In Sterling, September brings high daytime temperatures around 27°C (81°F), with nights cooling to 15°C (59°F). Expect quite a bit of rainfall this month.

Rainfall in Sterling in September

You can expect rain on roughly 10 days based on historical data, averaging 97 mm (3.8 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Sterling in September

The temperature in Sterling in September is perfect. Daytime highs reach 27°C (81°F), with nights dropping to 15°C (59°F). Overall, the month follows a fairly predictable daily temperature pattern. Nights cool down to 15°C (59°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Sterling in September

With approximately 225 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

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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 Sterling's climate page.

Sterling Temperature in September

Min Temperature 15°C (59°F)  

Max Temperature 27°C (81°F)  

Chance of Rain 33%  

Precipitation 97 mm (3.8 in)  

Rainy days 10 days  

Humidity 68% *  

Sunshine 225 hours *  

Percentage Sunshine 60% *  

* Data from: Washington DC, the United States of America (36 KM, 22 Miles).

What to Wear in Sterling in September

Warm but pleasant conditions in Sterling in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Sterling 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

8/10

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 Sterling's climate page.

More climate data for Sterling

Temperature Rainfall Sunshine Humidity

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