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
Tappan's weather subtly changes with the onset of September, barely falling from a warm 77.5°F (25.3°C) in August to a pleasant 71.2°F (21.8°C). Nighttime temperature in Tappan lowers to an average of 55.4°F (13°C) in September.Humidity
The average relative humidity in September is 78%.Rainfall
In Tappan, in September, during 13 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. Throughout the year, there are 138 rainfall days, and 17.8" (452mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Tappan.Daylight
In Tappan, the average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:55 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 7:12 pm EDT.
Sunshine
In Tappan, the average sunshine in September is 8.1h.UV index
In Tappan, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: In September, a daily maximum UV index of 3 leads to the following instructions:
Exercise prevention - Protecting skin and eyes from harm is required. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Tappan in September?
What is the average humidity in September in Tappan?
How many days does it rain in September in Tappan?
When it does not snow in Tappan?
Does it snow in Tappan in September?
What is the average length of the day in September in Tappan?
When are sunrise and sunset in September in Tappan?
How many hours of sunshine does Tappan have in September?
How high is the UV index in September in Tappan?
Average temperature in September
Tappan, MI
- Average high temperature in September: 71.2°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in September: 55.4°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 (18.3°F).
Average pressure in September
Tappan, 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 (29.93"Hg).
Average wind speed in September
Tappan, MI
- Average wind speed in September: 7.8mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in September
Tappan, MI
- Average humidity in September: 78%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April and May (76%).
Average rainfall in September
Tappan, MI
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is February (0.87").
Average rainfall days in September
Tappan, MI
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in September
Tappan, MI
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Tappan, 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
Tappan, 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 18min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in September
Tappan, MI
- Average sunshine days in September: 14.2 days
The months with the most sunshine days are October and November (15 days).
The month with the least sunshine days is February (11.3 days).
Average UV index in September
Tappan, MI
- Average UV index in September: 3
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
Tappan, MI
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in September
Tappan, MI
- 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).
Tappan, Michigan, USA
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