Holtsville Weather in September

Holtsville in September averages 24°C (75°F) during the day and 15°C (59°F) at night. Keep in mind that quite a bit of rainfall is expected this month.

Rainfall in Holtsville in September

Rain is expected on roughly 9 days, totalling around 87 mm (3.4 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Holtsville in September

Holtsville has excellent weather in September, with days reaching 24°C (75°F) and nights cooling to 15°C (59°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. At 15°C (59°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Holtsville in September

Enjoy a sunny month with about 218 hours of sunshine, the clear skies make Holtsville even more beautiful.

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

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• January
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• October
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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 Holtsville's climate page.

Holtsville Temperature in September

Min Temperature 15°C (59°F)  

Max Temperature 24°C (75°F)  

Chance of Rain 30%  

Precipitation 87 mm (3.4 in)  

Rainy days 9 days  

Humidity 68% *  

Sunshine 218 hours *  

Percentage Sunshine 59% *  

* Data from: New York City, the United States of America (72 KM, 44 Miles).

What to Wear in Holtsville in September

Pleasant temperatures in September 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 Holtsville in September

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

Swimming

9/10

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

8/10

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 Holtsville's climate page.

More climate data for Holtsville

Temperature Rainfall Sunshine Humidity

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