Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The transition into September in Manchester is accompanied by a slight temperature decrease, with the average high-temperature shifting from a moderately hot 81°F (27.2°C) in August to a still warm 73.4°F (23°C). During the month of September, an average low-temperature of 55.2°F (12.9°C) is recorded.Humidity
In September, the average relative humidity in Manchester is 77%.Rainfall
September is the month with the least rainfall. Rain falls for 12.5 days and accumulates 1.77" (45mm) of precipitation.Snowfall
In Manchester, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 28min.On the first day of September in Manchester, Connecticut, sunrise is at 6:16 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:33 pm EDT.
Sunshine
The average sunshine in September in Manchester, Connecticut, is 8.7h.UV index
In Manchester, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: A typical high UV index of 4 in September suggests the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. To guard against the harmful effects of the Sun, minimize exposure during midday. Boost your sun resistance with garments that are densely woven yet spacious.
Frequently asked questions
What are the temperatures in Manchester in September?
What is the average humidity in September in Manchester?
What is the driest month in Manchester?
How much does it rain in Manchester in September?
When it does not snow in Manchester?
Does it snow in Manchester in September?
How many hours of daylight does Manchester have in September?
When are sunrise and sunset in September in Manchester?
How long on average sun shines in September in Manchester?
What is the UV index intensity in September in Manchester?
Average temperature in September
Manchester, CT
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in September: 55.2°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in September
Manchester, CT
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Manchester, CT
- Average wind speed in September: 5.8mph
The windiest months (with the highest average wind speed) are January and March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Manchester, CT
- Average humidity in September: 77%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (71%).
Average rainfall in September
Manchester, CT
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is December (3.27").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in September
Manchester, CT
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (10 days).
Average snowfall in September
Manchester, CT
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Manchester, CT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Manchester, CT
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Manchester, CT
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in September
Manchester, CT
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Manchester, CT
- Average cloud cover in September: 37
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Manchester, CT
- Average visibility in September: 5mi
The months with the highest visibility are January, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are February, May and September (5mi).
Manchester, Connecticut, USA
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