September weather forecastBrighton, MI
September
Weather in September
September ushers in the fall season with a significant decrease in temperature compared to the preceding month. Climate conditions are balanced, not too hot and far from cold, making it one of the ideal times to visit Brighton. Rainfall reduces to 1.85" (47mm) during this period, intensifying the autumn serenity. Foliage starting to change color from vibrant greens to soft shades of orange and red sets the town aglow, making September a visually delightful month.Temperature
In September, the average high-temperature marginally decreases from a warm 77.5°F (25.3°C) in August to an agreeable 71.6°F (22°C). September nights are marked by an average low-temperature of 53.6°F (12°C).Humidity
The average relative humidity in September in Brighton is 79%.Rainfall
In Brighton, during September, the rain falls for 13.7 days and regularly aggregates up to 1.85" (47mm) of precipitation. Throughout the year, in Brighton, there are 147.8 rainfall days, and 25.35" (644mm) of precipitation is accumulated.Snowfall
In Brighton, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 29min.On the first day of the month, sunrise is at 7:00 am and sunset at 8:08 pm. On the last day of September, sunrise is at 7:31 am and sunset at 7:17 pm EDT.
Sunshine
In September, the average sunshine is 7.7h.UV index
In September, the average daily maximum UV index in Brighton is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: In September, a daily UV index of 3 turns into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Brighton, MI
- Average high temperature in September: 71.6°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in September: 53.6°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
Brighton, 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
Brighton, MI
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in September
Brighton, MI
- Average humidity in September: 79%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is April (77%).
Average rainfall in September
Brighton, MI
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is May (3.27").
The driest month (with the least rainfall) is December (1.18").
Average rainfall days in September
Brighton, MI
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is May (18.9 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in September
Brighton, MI
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.35").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Brighton, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Brighton, MI
- Average daylight in September: 12h and 30min
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 42min
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 42min).
Average sunshine days in September
Brighton, MI
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is December (17.3 days).
The month with the least sunshine days is May (10.1 days).
Average UV index in September
Brighton, 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
Brighton, MI
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Brighton, MI
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
