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
September brings a slight decrease in the average high-temperature, shifting from 82.9°F (28.3°C) in August to a still warm 76.3°F (24.6°C). In September, Montchanin encounters an average low-temperature of 59.9°F (15.5°C) during the night.Humidity
In September, the average relative humidity in Montchanin is 77%.Rainfall
In September, in Montchanin, the rain falls for 13.3 days. Throughout September, 2.4" (61mm) of precipitation is accumulated. Throughout the year, in Montchanin, there are 168.9 rainfall days, and 35.55" (903mm) of precipitation is accumulated.Snowfall
In Montchanin, snow does not fall in June through September.Daylight
The average length of the day in September in Montchanin is 12h and 26min.On the first day of September in Montchanin, sunrise is at 6:31 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:45 pm EDT.
Sunshine
In Montchanin, the average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September in Montchanin is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: A typical high UV index of 4 in September suggests the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Frequently asked questions
What are September temperatures in Montchanin?
What is the average humidity in September in Montchanin?
How many days does it rain in September in Montchanin?
When it does not snow in Montchanin?
Does it snow in Montchanin in September?
How many hours of daylight does Montchanin have in September?
When are sunrise and sunset in September in Montchanin?
How long on average sun shines in September in Montchanin?
How high is the UV index in September in Montchanin?
Average temperature in September
Montchanin, DE
- Average high temperature in September: 76.3°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).
Average pressure in September
Montchanin, DE
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Montchanin, DE
- Average wind speed in September: 5.8mph
The windiest months (with the highest average wind speed) are January, February and March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in September
Montchanin, DE
- Average humidity in September: 77%
The month with the highest relative humidity is October (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Montchanin, DE
- Average rainfall in September: 2.4"
The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is January (2.36").
Average rainfall days in September
Montchanin, DE
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in September
Montchanin, DE
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.58").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Montchanin, DE
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Montchanin, DE
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in September
Montchanin, DE
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is November (18.6 days).
The months with the least sunshine days are May and July (9.8 days).
Average UV index in September
Montchanin, DE
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Montchanin, DE
- Average cloud cover in September: 37
The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Montchanin, DE
- 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).
Montchanin, Delaware, USA
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