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
September brings a slight decrease in the average high-temperature, shifting from a moderately hot 77.9°F (25.5°C) in August to a pleasant 72°F (22.2°C). Ionia experiences an average low-temperature reading of 52.5°F (11.4°C) throughout September.Humidity
In Ionia, the average relative humidity in September is 79%.Rainfall
In Ionia, during September, the rain falls for 10.7 days and regularly aggregates up to 1.14" (29mm) of precipitation. Throughout the year, there are 135.7 rainfall days, and 18.58" (472mm) of precipitation is accumulated.Snowfall
In Ionia, snow does not fall in May through September.Daylight
In Ionia, the average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 7:05 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 7:22 pm EDT.
Sunshine
In Ionia, the average sunshine in September is 7.8h.UV index
In Ionia, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the UV index of 3 transforms into the following advice:
Ensure safety - Recommendations to avert sunburn are presented. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September in Ionia?
When it does not snow?
Does it snow in September?
How many hours of daylight does Ionia have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Ionia have in September?
What is the UV index reading in September?
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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