Old Lyme Weather in September

Old Lyme in September averages 24°C (75°F) during the day and 14°C (57°F) at night. Keep in mind that quite a bit of rainfall is expected this month.

Rainfall in Old Lyme in September

You can typically expect 9 days of rain this month, averaging around 113 mm (4.4 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Old Lyme in September

Daytime highs in Old Lyme in September reach 24°C (75°F), with nights around 14°C (57°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights drop to around 14°C (57°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Old Lyme in September

Enjoy a sunny month with about 223 hours of sunshine, the clear skies make Old Lyme even more beautiful.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. May and July typically offer the best weather for Old Lyme.

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• January
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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 Old Lyme's climate page.

Old Lyme Temperature in September

Min Temperature 14°C (57°F)  

Max Temperature 24°C (75°F)  

Chance of Rain 31%  

Precipitation 113 mm (4.4 in)  

Rainy days 9 days  

Humidity 72% *  

Sunshine 223 hours *  

Percentage Sunshine 60% *  

* Data from: Hartford, the United States of America (57 KM, 36 Miles).

What to Wear in Old Lyme in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Old Lyme 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

Camping

6/10

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 Old Lyme's climate page.

More climate data for Old Lyme

Temperature Rainfall Sunshine Humidity

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