If you plan to visit Grand Rapids in September, the weather is typically alright, with an average high temperature of +23°C during the day and approximately 6 sunny days. Expect some rainy, though, as there are typically 14 rainy days in the month and around 84 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flightsin one click on Avionero.
Average weather
☀️
+23°C
Avg. max. temperature
-2°C
Min.
+36°C
Max.
84 mm
Total precipitation
75%
Avg. humidity
2 m/s
Avg. wind
6 ☀️
Sunny Days
10 ⛅️
Cloudy
14 🌦
Rainy
Our opinion: Grand Rapids has OK weather in September.
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Average temperature in Grand Rapids in September
Here are the expected maximum, average and minimum temperatures in Grand Rapids for September based on the historical data.
Last Year
Historical Data
Going from a maximum of +32°C during the day to a minimum of +8°C during the night, the temperature in September averages around +23°C.
The average maximum temperature goes down 4% by the end of the month, compared with the beginning of the month, from +27°C to +26°C.
Is Grand Rapids warm or cold in September?
Grand Rapids is typically warm in September.
Maximum temperatures go down compared to the previous month from +26°C to +23°C. The minimum temperature also goes down from +17°C to +13°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how September is compared to other months in Grand Rapids:
Climate in Grand Rapids in September
Grand Rapids weather looks like this, on average, in September and the surrounding months.
August
September
October
Avg. temperature
+26°C
+23°C
+16°C
Min. temperature
+5°C
-2°C
-5°C
Max. temperature
+35°C
+36°C
+30°C
Rainfall
96 mm
84 mm
98 mm
Wind
2 m/s
2 m/s
3 m/s
Humidity
75%
75%
75%
Air pressure
1015 HPa
1016 HPa
1016 HPa
Sunny days
6
6
5
Cloudy days
9
10
11
Rainy days
15
14
15
Snowy days
0
0
0
September weather is still as ok as in August.It’s getting colder in September. From +26°C in the day, the average maximum temperature lowers to +23°C.As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 96 mm to 84 mm.Humidity levels don’t change as the month goes on, averaging around 75%.The average wind speed doesn’t change much during September, staying around 2 m/s.The amount of sunny days stay about the same, averaging 6 sunny days during the month.
October brings much the same weather, it remains ok.
Wind speed in Grand Rapids in September based on historical data.
Last Year
Historical Data
The average wind speed is 2 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Grand Rapids is gradually increasing during September, going from 1 m/s to 1 m/s over the course of the month.
Rain
Amount of rainfall in mm during September in Grand Rapids based on historical data.
Last Year
Historical Data
Typically, there is a 33% chance of rain on an average day in September, with total rainfall of approximately 63 mm. The maximum amount of rainfall per day is around 33 mm, which is moderate rain.September is a pretty wet month with over 10 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of galoshes.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Grand Rapids wettest month is October, where a typical day has a 48% chance of precipitation and 98 mm of rainfall per day. January, on the other hand, is the driest month with a mere 6% chance of precipitation and 22 mm of rainfall per day.
How was the weather last September in Grand Rapids?
This is the weather in Grand Rapids in September 2024:
1 September
☀️
+27°C
2 September
☁️
+26°C
3 September
☀️
+31°C
4 September
☀️
+32°C
5 September
☁️
+32°C
6 September
☁️
+28°C
7 September
☁️
+23°C
8 September
☁️
+20°C
9 September
☁️
+23°C
10 September
☀️
+24°C
11 September
🌫️
+20°C
12 September
☁️
+20°C
13 September
☀️
+17°C
14 September
☀️
+21°C
15 September
☀️
+22°C
16 September
☁️
+21°C
17 September
☁️
+20°C
18 September
☁️
+18°C
19 September
☀️
+19°C
20 September
☁️
+26°C
21 September
☁️
+27°C
22 September
☁️
+27°C
23 September
☀️
+24°C
24 September
☀️
+24°C
25 September
☁️
+21°C
26 September
☁️
+22°C
27 September
🌧️
+19°C
28 September
☁️
+19°C
29 September
☁️
+21°C
30 September
🌫️
+26°C
In September 2024 Grand Rapids had 10 sunny days, 17 cloudy days, and 1 rainy days. The average maximum temperature was +23°C, with an absolute maximum of +32°C and a minimum of +17°C. The average humidity was 81%, with a maximum of 99% and a minimum of 46%. The average wind speed was 2 m/s, with a maximum of 9 m/s and a minimum of 0 m/s.
Are you planning a trip in September?
Climate Change over Years
This is how Grand Rapids climate have been changing during last 43 years period.
The climate in Grand Rapids in September has not changed much over the last 43 years.
The average temperature was the lowest in 1996 (+13°C) and the highest in 2012 (+17°C). The driest year was 1989 with only 519 mm of rainfall, and the wettest year was 2021 with 1616 mm.
FAQ
Frequently asked questions about the weather in Grand Rapids in September:
Is September a good time to visit Grand Rapids?
It’s always a good time to visit Grand Rapids, but the weather is changeable in September, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in Grand Rapids in September?
September is warm in Grand Rapids. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.
Is Grand Rapids rainy in September?
Grand Rapids is often rainy in September. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Grand Rapids in September?
Usually, it’s not very sunny in Grand Rapids in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
For this page, we’ve looked at the typical weather in Grand Rapids, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
