September weather forecastRichmond, MI
September
Weather in September
September, the first month of the autumn in Richmond, is also an agreeable month, with an average temperature ranging between max 71.1°F (21.7°C) and min 54.9°F (12.7°C).Temperature
A moderate decline in average high-temperatures is noted in September, moving from a moderately hot 77.5°F (25.3°C) in August to an agreeable 71.1°F (21.7°C). An average minimum temperature of 54.9°F (12.7°C) marks the month of September in Richmond.Humidity
In September, the average relative humidity in Richmond, Michigan, is 78%.Rainfall
In September, in Richmond, the rain falls for 13.7 days. Throughout September, 1.61" (41mm) of precipitation is accumulated. Throughout the year, there are 153.6 rainfall days, and 22.52" (572mm) of precipitation is accumulated.Snowfall
In Richmond, snow does not fall in June through September.Daylight
In Richmond, Michigan, the average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:56 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 7:13 pm EDT.
Sunshine
The average sunshine in September in Richmond is 8.3h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The average daily UV index of 4 in September transforms into the following instructions:
Act with care - Obligation to protect against skin and eye damage is highlighted. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Richmond, MI
- Average high temperature in September: 71.1°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in September: 54.9°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in September
Richmond, MI
- Average pressure in September: 30.03"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
Richmond, MI
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in September
Richmond, MI
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Richmond, MI
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is May (2.64").
The driest month (with the least rainfall) is December (1.22").
Average rainfall days in September
Richmond, MI
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is February (6.4 days).
Average snowfall in September
Richmond, MI
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.41").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Richmond, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Richmond, 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: 8h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Richmond, MI
- Average sunshine days in September: 13.7 days
The month with the most sunshine days is November (14.2 days).
The month with the least sunshine days is February (9.5 days).
Average UV index in September
Richmond, MI
- Average UV index in September: 4
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
Richmond, MI
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in September
Richmond, 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).
