Frederick Weather in September

September in Frederick sees daytime temperatures around 27°C (81°F) and lows of 14°C (57°F) at night. With around 113 mm (4.4 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Frederick in September

Rain is expected on roughly 10 days, totalling around 113 mm (4.4 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Frederick in September

In September, Frederick gets high temperatures, with highs of 27°C (81°F). Nights cool to around 14°C (57°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights cool down to 14°C (57°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 Frederick in September

The city usually sees around 225 hours of sunlight, indicating many sunny days — a great month for sightseeing.

If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Frederick.

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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 Frederick's climate page.

Frederick Temperature in September

Min Temperature 14°C (57°F)  

Max Temperature 27°C (81°F)  

Chance of Rain 34%  

Precipitation 113 mm (4.4 in)  

Rainy days 10 days  

Humidity 68% *  

Sunshine 225 hours *  

Percentage Sunshine 60% *  

* Data from: Washington DC, the United States of America (70 KM, 43 Miles).

What to Wear in Frederick in September

Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Frederick 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 Frederick's climate page.

More climate data for Frederick

Temperature Rainfall Sunshine Humidity

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