New Haven weather in September (Connecticut, United States of America)

Planning a trip to New Haven in September? Wondering if it's an optimal time for a visit? This page provides detailed information on the weather conditions for that month.

In New Haven the weather in September is generally perfect, characterized by high temperatures and moderate rainfall. Daytime temperatures hover around 25°C, while nights can cool down to about 14°C.

New Haven in September usually receives moderate rainfall, averaging around 96 mm for the month. Rain is expected on roughly 10 days.

The city usually sees around 223 hours of sunlight, indicating many sunny days.

So this is a great month to visit if you prefer dry days with pleasant temperatures. July and September typically offer the most optimal weather. In contrast, January, February, March and December tend to have less optimal conditions.

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

 

New Haven, monthly averages in September

Min Temperature 14°C  

Max Temperature 25°C  

Chance of Rain 33%  

Precipitation 96 mm  

Rainy days 10 days  

Humidity 72% *  

Sunshine 223 hours *  

Percentage Sunshine 60% *  

* Data from: Hartford, the United States of America (54 KM, 33 Miles).

Where to go in the United States of America in September

Find out more about the weather in the United States of America in September and which places have the best weather 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 New Haven in September?

For visitors traveling to New Haven, 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 in September.

Swimming

9/10

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

8/10

Outdoor sports

9/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in New Haven.

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 climate conditions. Find out where to go with our weather planner.