Sterling
Weather by month
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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 excellent. 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.

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).

Sterling Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Sterling - and find the best time to visit.

Best Places in the United States of America in September

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 September →

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 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

Sterling 3-Day Forecast

Popular in September

Where to go in September - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.