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
Grand Rapids notes an average high-temperature of a still warm 74.1°F (23.4°C) in September, hardly diverging from August. Grand Rapids records an average low-temperature of 55.8°F (13.2°C) throughout the month of September.Humidity
The average relative humidity in September in Grand Rapids is 79%.Rainfall
In Grand Rapids, Ohio, in September, during 14.5 rainfall days, 1.81" (46mm) of precipitation is typically accumulated. Throughout the year, in Grand Rapids, Ohio, there are 170.7 rainfall days, and 28.39" (721mm) of precipitation is accumulated.Snowfall
In Grand Rapids, snow does not fall in June through September.Daylight
In Grand Rapids, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 7:02 am and sunset at 8:07 pm. On the last day of September, sunrise is at 7:31 am and sunset at 7:18 pm EDT.
Sunshine
In Grand Rapids, the average sunshine in September is 8h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: The UV index of 4 during September translates into the following guidance:
Act with care - The need to guard against sun damage is communicated. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Grand Rapids in September?
What is the average humidity in September in Grand Rapids?
How many days does it rain in September in Grand Rapids?
When it does not snow in Grand Rapids?
Does it snow in Grand Rapids in September?
What is the average length of the day in September in Grand Rapids?
When is the sunrise / sunset in September in Grand Rapids?
How long on average sun shines in September in Grand Rapids?
What is the UV index intensity in September in Grand Rapids?
Average temperature in September
Grand Rapids, OH
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.7°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).
Average pressure in September
Grand Rapids, OH
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Grand Rapids, OH
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in September
Grand Rapids, OH
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Grand Rapids, OH
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is April (3.31").
The driest month (with the least rainfall) is December (1.73").
Average rainfall days in September
Grand Rapids, OH
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (8.8 days).
Average snowfall in September
Grand Rapids, OH
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.45").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Grand Rapids, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grand Rapids, OH
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in September
Grand Rapids, OH
- Average sunshine days in September: 12.5 days
The month with the most sunshine days is November (14.9 days).
The month with the least sunshine days is February (8.9 days).
Average UV index in September
Grand Rapids, OH
- Average UV index in September: 4
The months with the highest UV index are June and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Grand Rapids, OH
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Grand Rapids, OH
- 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).
Grand Rapids, Ohio, USA
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