September weather forecastSparta, MI
September
Weather in September
September, the first month of the autumn in Sparta, is still a pleasant month, with an average temperature varying between 71.8°F (22.1°C) and 53.8°F (12.1°C).Temperature
September reveals a small adjustment in temperature, transitioning from an average high of a warm 78.3°F (25.7°C) in August to an agreeable 71.8°F (22.1°C). The month of September records an average low-temperature of 53.8°F (12.1°C) in Sparta.Humidity
In September, the average relative humidity is 78%.Rainfall
September is the month with the least rainfall in Sparta, Michigan. Rain falls for 12.1 days and accumulates 1.5" (38mm) of precipitation.Snowfall
In Sparta, 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 September, sunrise is at 7:07 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 7:25 pm EDT.
Sunshine
In Sparta, Michigan, the average sunshine in September is 8.2h.UV index
The average daily maximum UV index in September in Sparta is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: In September, a regular UV index of 4 translates into these guidelines:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sparta, MI
- Average high temperature in September: 71.8°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (27.5°F).
- Average low temperature in September: 53.8°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in September
Sparta, 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 (29.92"Hg).
Average wind speed in September
Sparta, MI
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in September
Sparta, MI
- Average humidity in September: 78%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (74%).
Average rainfall in September
Sparta, MI
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is October (3.27").
The driest month (with the least rainfall) is September (1.5").
Average rainfall days in September
Sparta, MI
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is February (6.1 days).
Average snowfall in September
Sparta, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (8.23").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Sparta, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (21.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sparta, 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 12min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in September
Sparta, MI
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is September (15.5 days).
The months with the least sunshine days are January and February (7.5 days).
Average UV index in September
Sparta, 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, November and December (UV index 1).
Average cloud cover in September
Sparta, MI
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in September
Sparta, MI
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
