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
The onset of September results in a small decrease in the average high-temperature, moderately receding from a warm 77.9°F (25.5°C) in August to a pleasant 72°F (22.2°C). Ionia records an average low of 52.5°F (11.4°C) throughout the nights in September.Humidity
The average relative humidity in September in Ionia is 79%.Rainfall
In Ionia, in September, during 10.7 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. Throughout the year, in Ionia, there are 135.7 rainfall days, and 18.58" (472mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall in Ionia, Michigan.Daylight
In September, the average length of the day is 12h and 29min.On the first day of the month, sunrise is at 7:05 am and sunset at 8:14 pm. On the last day of September, in Ionia, sunrise is at 7:37 am and sunset at 7:22 pm EDT.
Sunshine
In September, the average sunshine in Ionia is 7.8h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 3 during September translates into the following guidance:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Frequently asked questions
What is the temperature in September in Ionia?
What is the average humidity in September in Ionia?
How many days does it rain in September in Ionia?
When it does not snow in Ionia?
Does it snow in Ionia in September?
How many hours of daylight does Ionia have in September?
What time are sunrise and sunset in September in Ionia?
How many hours of sunshine does Ionia have in September?
How high is the UV index in September in Ionia?
Average temperature in September
Ionia, MI
- Average high temperature in September: 72°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (27.1°F).
- Average low temperature in September: 52.5°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 (16.9°F).
Average pressure in September
Ionia, 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
Ionia, MI
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in September
Ionia, MI
- Average humidity in September: 79%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Ionia, MI
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is May (2.52").
The driest months (with the least rainfall) are February and November (1.06").
Average rainfall days in September
Ionia, MI
- Average rainfall days in September: 10.7 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is February (5.4 days).
Average snowfall in September
Ionia, MI
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Ionia, 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
Ionia, 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 6min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in September
Ionia, MI
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is September (17.4 days).
The month with the least sunshine days is February (9.6 days).
Average UV index in September
Ionia, 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, November and December (UV index 1).
Average cloud cover in September
Ionia, MI
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Ionia, MI
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, September, October and November (6mi).
The months with the lowest visibility are January, February, August and December (5mi).
Ionia, Michigan, USA
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