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
With the commencement of September, Napoleon records a moderate temperature decline, with the average high easing from August's warm 77.5°F (25.3°C) to a pleasant 71.6°F (22°C). During the month of September, Napoleon experiences a steady low-temperature average of 53.8°F (12.1°C).Humidity
In Napoleon, Michigan, the average relative humidity in September is 80%.Rainfall
In Napoleon, in September, it is raining for 13.3 days, with typically 1.46" (37mm) of accumulated precipitation. In Napoleon, Michigan, during the entire year, the rain falls for 144.6 days and collects up to 20.2" (513mm) of precipitation.Snowfall
June through September are months without snowfall in Napoleon.Daylight
The average length of the day in September in Napoleon is 12h and 28min.On the first day of September in Napoleon, sunrise is at 7:03 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 7:19 pm EDT.
Sunshine
In September, the average sunshine is 7.9h.UV index
In Napoleon, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Undertake protective steps - Preventing sun damage is advised. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Frequently asked questions
What are September temperatures in Napoleon?
What is the average humidity in September in Napoleon?
How many days does it rain in September in Napoleon?
When it does not snow in Napoleon?
Does it snow in Napoleon in September?
How many hours of daylight does Napoleon have in September?
When is the sunrise / sunset in September in Napoleon?
How many hours of sunshine does Napoleon have in September?
What is the UV index reading in September in Napoleon?
Average temperature in September
Napoleon, MI
- Average high temperature in September: 71.6°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in September: 53.8°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in September
Napoleon, MI
- Average pressure in September: 30.04"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
Napoleon, MI
- Average wind speed in September: 7.2mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).
Average humidity in September
Napoleon, MI
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is April (77%).
Average rainfall in September
Napoleon, MI
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is December (0.87").
Average rainfall days in September
Napoleon, MI
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in September
Napoleon, MI
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.66").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Napoleon, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Napoleon, MI
- 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: 7h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in September
Napoleon, MI
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is May (9.9 days).
Average UV index in September
Napoleon, MI
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Napoleon, MI
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Napoleon, MI
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are January, February, August and September (5mi).
Napoleon, Michigan, USA
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