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 the transition to September, Atlas observes a minor drop in the average high-temperature, shifting from a warm 77.4°F (25.2°C) in August to an agreeable 71.1°F (21.7°C). In Atlas, the average nighttime temperature during September is a cool 53.1°F (11.7°C).Humidity
The average relative humidity in September in Atlas is 80%.Rainfall
September and December are months with the least rain when the rain falls for 13.7 days and typically aggregates up to 1.57" (40mm) of rain.Snowfall
In Atlas, Michigan, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:59 am and sunset at 8:08 pm. On the last day of September, in Atlas, sunrise is at 7:31 am and sunset at 7:16 pm EDT.
Sunshine
The average sunshine in September in Atlas, Michigan, is 7.8h.UV index
The average daily maximum UV index in September in Atlas is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: In September, a daily UV index of 3 turns into the following recommendations:
Heed the precautions - It is counselled to guard against solar damage. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Atlas?
What is the average humidity in September in Atlas?
What is the driest month in Atlas?
How much does it rain in Atlas in September?
When it does not snow in Atlas?
Does it snow in Atlas in September?
What is the average length of the day in September in Atlas?
What time are sunrise and sunset in September in Atlas?
How long on average sun shines in September in Atlas?
How high is the UV index in September in Atlas?
Average temperature in September
Atlas, MI
- Average high temperature in September: 71.1°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (27.1°F).
- Average low temperature in September: 53.1°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 (16.2°F).
Average pressure in September
Atlas, 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
Atlas, MI
- Average wind speed in September: 7.3mph
The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in September
Atlas, 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
Atlas, MI
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is May (3.03").
The driest months (with the least rainfall) are September and December (1.57").
Average rainfall days in September
Atlas, MI
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in September
Atlas, MI
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.14").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Atlas, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Atlas, 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: 7h and 5min
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 48min).
Average sunshine days in September
Atlas, MI
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is September (14.2 days).
The month with the least sunshine days is January (8.4 days).
Average UV index in September
Atlas, 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 and December (UV index 1).
Average cloud cover in September
Atlas, 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 31).
Average visibility in September
Atlas, MI
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, August, October and November (6mi).
The months with the lowest visibility are January, February, September and December (5mi).
Atlas, Michigan, USA
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