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 Greenville, entering September brings a subtle temperature decrement, reducing from August's warm 77.9°F (25.5°C) to a pleasant 71.4°F (21.9°C). Greenville's temperature lowers to a mean of 52.3°F (11.3°C) during the nights in September.Humidity
In September, the average relative humidity is 79%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.2 days and typically collects 1.42" (36mm) of precipitation.Snowfall
In Greenville, snow does not fall in May through September.Daylight
In Greenville, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 7:06 am and sunset at 8:15 pm. On the last day of September, sunrise is at 7:38 am and sunset at 7:23 pm EDT.
Sunshine
In September, the average sunshine is 8.1h.UV index
In Greenville, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index, 3 in September, converts into the following recommendations:
Take precautions - Protection against sunburn is recommended. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Greenville have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Greenville have in September?
What is the UV index intensity in September?
Average temperature in September
Greenville, MI
- Average high temperature in September: 71.4°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in September: 52.3°F
The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in September
Greenville, MI
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Greenville, MI
- Average wind speed in September: 7.4mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in September
Greenville, MI
- Average humidity in September: 79%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Greenville, MI
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in September
Greenville, MI
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is February (6.3 days).
Average snowfall in September
Greenville, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (7.13").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Greenville, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (20.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Greenville, 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 1min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in September
Greenville, MI
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is February (7.3 days).
Average UV index in September
Greenville, MI
- Average UV index in September: 3
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, November and December (UV index 1).
Average cloud cover in September
Greenville, MI
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Greenville, MI
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, August, October and November (6mi).
The month with the lowest visibility is January (4mi).
Greenville, Michigan, USA
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