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
A shift in Grand Rapids's weather is observed as August turns into September, with the average high temperature reducing from a moderately hot 77.2°F (25.1°C) to a comfortable 67.3°F (19.6°C). Grand Rapids records an average low of 47.5°F (8.6°C) throughout the nights in September.Humidity
The average relative humidity in September is 76%.Rainfall
In September, the rain falls for 11.6 days. Throughout September, 1.42" (36mm) of precipitation is accumulated. In Grand Rapids, Minnesota, during the entire year, the rain falls for 113.8 days and collects up to 18.94" (481mm) of precipitation.Snowfall
In Grand Rapids, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:34 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:54 pm CDT.
Sunshine
In September, the average sunshine is 8h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In September, an average UV index of 4 transforms into the following instructions:
Make use of precautions - Suggestions to resist sunburn are communicated. The solar radiation around mid-day is intense; avoid the Sun and stay safe. During bright days, sunglasses that offer UVA and UVB defense are recommended. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Grand Rapids?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Grand Rapids have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Grand Rapids have in September?
How high is the UV index in September?
Average temperature in September
Grand Rapids, MN
- Average high temperature in September: 67.3°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 (15.8°F).
- Average low temperature in September: 47.5°F
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (1.4°F).
Average pressure in September
Grand Rapids, MN
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Grand Rapids, MN
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Grand Rapids, MN
- Average humidity in September: 76%
The months with the highest relative humidity are January and February (93%).
The month with the lowest relative humidity is May (70%).
Average rainfall in September
Grand Rapids, MN
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is June (2.91").
The driest months (with the least rainfall) are January and February (0.75").
Average rainfall days in September
Grand Rapids, MN
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is June (16.4 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in September
Grand Rapids, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (7.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Grand Rapids, MN
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is January (21.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Grand Rapids, MN
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 1h and 54min).
Average sunshine days in September
Grand Rapids, MN
- Average sunshine days in September: 16.5 days
The months with the most sunshine days are August and September (16.5 days).
The month with the least sunshine days is February (10.1 days).
Average UV index in September
Grand Rapids, MN
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Grand Rapids, MN
- Average cloud cover in September: 43
The month with the most cloud cover is January (Cloud cover 81).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in September
Grand Rapids, MN
- Average visibility in September: 5mi
The months with the highest visibility are May and June (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
Grand Rapids, Minnesota, USA
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