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 reveals a small adjustment in temperature, transitioning from an average high of an agreeable 69.4°F (20.8°C) in August to a refreshing 63.5°F (17.5°C). Rockland's temperature lowers to a mean of 52.7°F (11.5°C) during the nights in September.Humidity
The average relative humidity in September is 79%.Rainfall
In Rockland, in September, it is raining for 13.3 days, with typically 1.85" (47mm) of accumulated precipitation. Throughout the year, there are 122.6 rainfall days, and 22.56" (573mm) of precipitation is accumulated.Snowfall
In Rockland, snow does not fall in June through September.Daylight
In September, the average length of the day in Rockland is 12h and 32min.On the first day of September in Rockland, sunrise is at 7:17 am and sunset at 8:35 pm. On the last day of the month, sunrise is at 7:55 am and sunset at 7:37 pm EDT.
Sunshine
The average sunshine in September is 7.7h.UV index
In Rockland, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 4 during September translates into the following recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. Minimize direct exposure to the Sun during midday when its radiation is at its peak. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Rockland?
What is the average humidity in September in Rockland?
How many days does it rain in September in Rockland?
When it does not snow in Rockland?
Does it snow in Rockland in September?
What is the average length of the day in September in Rockland?
When is the sunrise / sunset in September in Rockland?
How many hours of sunshine does Rockland have in September?
What is the UV index intensity in September in Rockland?
Average temperature in September
Rockland, MI
- Average high temperature in September: 63.5°F
The warmest month (with the highest average high temperature) is August (69.4°F).
The month with the lowest average high temperature is January (22.3°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is August (58.1°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in September
Rockland, MI
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Rockland, MI
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is January (12.6mph).
The calmest month (with the lowest average wind speed) is June (7.6mph).
Average humidity in September
Rockland, MI
- Average humidity in September: 79%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is May (75%).
Average rainfall in September
Rockland, MI
- Average rainfall in September: 1.85"
The wettest months (with the highest rainfall) are April, June, August and October (2.28").
The driest month (with the least rainfall) is February (1.22").
Average rainfall days in September
Rockland, MI
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is October (14.6 days).
The month with the least rainy days is February (2.5 days).
Average snowfall in September
Rockland, MI
- Average snowfall in September: 0"
The month with the highest snowfall is December (6.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Rockland, MI
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (22.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Rockland, MI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 7h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 1h and 36min).
Average sunshine days in September
Rockland, MI
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is July (15.5 days).
The month with the least sunshine days is January (5.6 days).
Average UV index in September
Rockland, MI
- Average UV index in September: 4
The months with the highest UV index are 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
Rockland, MI
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 84).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in September
Rockland, MI
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, November and December (5mi).
Rockland, Michigan, USA
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