Connecticut in september: average Weather, Temperature and Climate
Weather in Connecticut in september 2025
The weather in Connecticut in the month of september comes from statistical datas on the last years. You can view the weather statistics for all the month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather
Weather at 6am
61°F
Clear/Sunny
41% of time
22%
12%
10%
Weather at 12pm
76°F
Clear/Sunny
42% of time
24%
18%
11%
Weather at 6pm
67°F
Clear/Sunny
46% of time
18%
18%
10%
Weather at 3am
59°F
32%
29%
15%
14%
Evolution of daily average temperature and precipitation in Connecticut in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Connecticut in september.
The climate of Connecticut in september is good
In september in Connecticut, the climate is relatively dry (with 4.8in of rainfall over 6 days). This is better than the previous month since in august it receives an average of 6.7in of precipitation over 9 days.
The climate comfortable there the month of september. Temperatures are up to 76°F. In the morning the temperature drops to 61°F. Thus, the mean temperature average on this month of september in Connecticut is 68°F. These temperatures are far removed from those records observed in Connecticut in september with a maximum record of 95°F in 2015 and a minimum record of 41°F in 2020.
On this month of september, day length in Connecticut is generally 12:28. Sunrise is at 05:33 and sunset is at 18:01.
With a good weather, september is a good time to go in this locality.
Seasonal average climate and temperature of Connecticut in september
Check below seasonal norms These datas are compiled from the weather statements of the past years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 68°F | ||||
| Highest temperature | 76°F | ||||
| Lowest temperature | 61°F | ||||
| Highest record temperature | 95°F (2015) | ||||
| Lowest record temperature | 41°F (2020) | ||||
| Number of days at +86°F | 3 day(s) (10%) | ||||
| Number of days at +65°F | 28 day(s) (93%) | ||||
| Number of days at -32°F | 0 day(s) (0%) | ||||
| Wind | |||||
| Wind speed | 14km/h | ||||
| Wind temperature | 59°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 4.8in | ||||
| Number of days with rainfall | 6 day(s) (20%) | ||||
| Record daily rainfall | 2.9in (2012) | ||||
| Snowfall | 0cm | ||||
| Other climate data | |||||
| Humidity | 87% | ||||
| Visibility | 8.61km | ||||
| Cloud cover | 37% | ||||
| UV index | 5 | ||||
| Daily sunshine hours | 12 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:33 | ||||
| Time of sunset | 18:01 | ||||
| Length of day | 12:28 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Connecticut in september 2024:
68°F to 76°F
61°F to 76°F
47°F to 74°F
50°F to 76°F
54°F to 74°F
52°F to 77°F
58°F to 67°F
45°F to 67°F
49°F to 70°F
52°F to 74°F
50°F to 77°F
52°F to 77°F
56°F to 83°F
59°F to 83°F
58°F to 77°F
52°F to 76°F
54°F to 72°F
59°F to 72°F
65°F to 67°F
65°F to 68°F
59°F to 68°F
56°F to 65°F
56°F to 63°F
54°F to 65°F
54°F to 58°F
59°F to 70°F
63°F to 68°F
63°F to 70°F
59°F to 61°F
56°F to 65°F
Map: other cities in the United States (USA) in september
Cities near Connecticut:
| New York City in september | good weather |
| Brooklyn in september | good weather |
| Albany in september | good weather |
| Rhode Island in september | perfect weather |
| Massachusetts in september | perfect weather |
| Boston in september | good weather |
| New Jersey in september | perfect weather |
| Hampton Beach in september | good weather |
| Provincetown in september | good weather |
| Philadelphia in september | good weather |
| Nantucket Island (Massachusetts) in september | good weather |
| Cape Cod National Seashore in september | good weather |
Click over cities on the map for information about the weather in september.
Connecticut
perfect weather
good
tolerable
bad
very bad
Weather data for Connecticut in september:
Weather data for Connecticut for september are derived from an average of the weather forecast since 2009 in Connecticut. There is a margin of error and these forecasts are to be considered as general information only. The weather in Connecticut can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Connecticut.