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
In Guilford, the average high-temperature in September slightly decreases from a moderately hot 79.7°F (26.5°C) in August to a pleasant 73°F (22.8°C). Guilford experiences a mean low-temperature of 59.9°F (15.5°C) during September.Humidity
The average relative humidity in September is 76%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.9 days and typically collects 2.09" (53mm) of precipitation.Snowfall
June through October are months without snowfall in Guilford, Connecticut.Daylight
In Guilford, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:17 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:33 pm EDT.
Sunshine
In Guilford, the average sunshine in September is 9h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the maximum UV index of 4 suggests these recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Frequently asked questions
What is the usual temperature for Guilford in September?
What is the average humidity in September in Guilford?
What is the driest month in Guilford?
How much does it rain in Guilford in September?
When it does not snow in Guilford?
How many hours of daylight does Guilford have in September?
When are sunrise and sunset in September in Guilford?
How many hours of sunshine does Guilford have in September?
What is the UV index reading in September in Guilford?
Average temperature in September
Guilford, CT
- Average high temperature in September: 73°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).
Average pressure in September
Guilford, CT
- Average pressure in September: 30.05"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
Guilford, CT
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).
Average humidity in September
Guilford, CT
- Average humidity in September: 76%
The month with the highest relative humidity is June (77%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Guilford, CT
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is December (3.94").
The driest month (with the least rainfall) is September (2.09").
Average rainfall days in September
Guilford, CT
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is January (9.6 days).
Average snowfall in September
Guilford, CT
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.11").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Guilford, CT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Guilford, CT
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Guilford, CT
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in September
Guilford, CT
- Average UV index in September: 4
The months with the highest UV index are June, July and August (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
Guilford, CT
- Average cloud cover in September: 33
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Guilford, CT
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Guilford, Connecticut, USA
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