Groton weather in September (Connecticut, United States of America)

How does the weather in Groton usually fare in September? Get all the weather information you need to plan your visit.

Temperatures

In September, Groton usually has high temperatures and high rainfall. Throughout the daytime, temperatures often hover around 23°C. However, as the sun sets and evening approaches, there's a noticeable cool-down. Temperatures gently drop to a more temperate 14°C.

Precipitation

Groton in September usually receives high rainfall, averaging around 104 mm for the month. According to historical climate patterns, there are usually around 10 days days of rain.

Average sunshine

Expect a lot of sunshine this month, with about 223 hours of sunny weather. The abundant sunlight creates a lively and bright atmosphere.

If you prefer dry days with pleasant temperatures, July and August typically offer the best circumstances. While January, February, March and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Groton climate page with graphs.

 

Groton, monthly averages in September

Min Temperature 14°C  

Max Temperature 23°C  

Chance of Rain 32%  

Precipitation 104 mm  

Rainy days 10 days  

Humidity 72% *  

Sunshine 223 hours *  

Percentage Sunshine 60% *  

Data from: Hartford, the United States of America (68 KM, 42 Miles).

Where to go 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.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

For visitors traveling to Groton, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

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

Swimming

9/10

Cycling

9/10

Walking

9/10

Camping

6/10

Outdoor sports

9/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Groton.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.