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 Casco, the average high-temperature in September gently drops from a moderately hot 77.5°F (25.3°C) in August to an agreeable 71.1°F (21.7°C). Casco's average low-temperature during September nights is observed to be a cool 54.9°F (12.7°C).Humidity
The average relative humidity in September is 78%.Rainfall
In September, in Casco, Michigan, the rain falls for 13.7 days. Throughout September, 1.61" (41mm) of precipitation is accumulated. Throughout the year, there are 153.6 rainfall days, and 22.52" (572mm) of precipitation is accumulated.Snowfall
In Casco, Michigan, snow does not fall in June through September.Daylight
In Casco, Michigan, the average length of the day in September is 12h and 29min.On the first day of September in Casco, sunrise is at 6:56 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 7:13 pm EDT.
Sunshine
In Casco, the average sunshine in September is 8.3h.UV index
In Casco, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Casco?
What is the average humidity in September in Casco?
How much does it rain in Casco in September?
When it does not snow in Casco?
Does it snow in Casco in September?
How many hours of daylight does Casco have in September?
What time are sunrise and sunset in September in Casco?
How many hours of sunshine does Casco have in September?
What is the UV index intensity in September in Casco?
Average temperature in September
Casco, MI
- Average high temperature in September: 71.1°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in September: 54.9°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in September
Casco, MI
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are March and November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Casco, MI
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in September
Casco, MI
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Casco, MI
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is May (2.64").
The driest month (with the least rainfall) is December (1.22").
Average rainfall days in September
Casco, MI
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is February (6.4 days).
Average snowfall in September
Casco, MI
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.41").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Casco, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Casco, MI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Casco, MI
- Average sunshine days in September: 13.7 days
The month with the most sunshine days is November (14.2 days).
The month with the least sunshine days is February (9.5 days).
Average UV index in September
Casco, MI
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Casco, MI
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in September
Casco, MI
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Casco, Michigan, USA
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