September weather forecastCaledonia, MI
September
Weather in September
September, the first month of the autumn in Caledonia, is still a pleasant month, with temperature in the range of an average high of 72.5°F (22.5°C) and an average low of 53.2°F (11.8°C).Temperature
Caledonia experiences a moderate temperature shift at the start of September, with average high-temperatures adjusting a bit from a warm 78.4°F (25.8°C) in August to an agreeable 72.5°F (22.5°C). An average low-temperature of 53.2°F (11.8°C) is expected during September.Humidity
In Caledonia, the average relative humidity in September is 78%.Rainfall
In Caledonia, in September, it is raining for 10.9 days, with typically 1.42" (36mm) of accumulated precipitation. Throughout the year, there are 136.2 rainfall days, and 18.98" (482mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Caledonia, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 7:07 am and sunset at 8:16 pm. On the last day of September, sunrise is at 7:39 am and sunset at 7:24 pm EDT.
Sunshine
In Caledonia, the average sunshine in September is 8.1h.UV index
In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes 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:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Caledonia, MI
- Average high temperature in September: 72.5°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 (27.5°F).
- Average low temperature in September: 53.2°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 (17.8°F).
Average pressure in September
Caledonia, 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
Caledonia, MI
- Average wind speed in September: 7.3mph
The windiest months (with the highest average wind speed) are February and April (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in September
Caledonia, 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 (75%).
Average rainfall in September
Caledonia, MI
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is October (2.32").
The driest month (with the least rainfall) is February (1.06").
Average rainfall days in September
Caledonia, MI
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is May (16.1 days).
The month with the least rainy days is February (5 days).
Average snowfall in September
Caledonia, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.13").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Caledonia, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Caledonia, 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 6min
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 24min).
Average sunshine days in September
Caledonia, MI
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is September (17.2 days).
The month with the least sunshine days is February (9.5 days).
Average UV index in September
Caledonia, MI
- Average UV index in September: 3
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Caledonia, MI
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Caledonia, 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).
