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 modest decline in the average high-temperature is seen during September, decreasing from a moderately hot 78.3°F (25.7°C) in August to an agreeable 70.7°F (21.5°C). The temperature dips to an average of 52.7°F (11.5°C) during September nights.Humidity
In Rockford, the average relative humidity in September is 74%.Rainfall
In September, in Rockford, the rain falls for 11.2 days. Throughout September, 1.65" (42mm) of precipitation is accumulated. In Rockford, Minnesota, during the entire year, the rain falls for 118.6 days and collects up to 21.14" (537mm) of precipitation.Snowfall
In Rockford, snow does not fall in June through September.Daylight
In Rockford, the average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:51 pm. On the last day of September, in Rockford, sunrise is at 7:12 am and sunset at 6:56 pm CDT.
Sunshine
The average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 4 in September translates into this advice:
Take necessary precautions - Protection from skin and eye injury is mandatory. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
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 much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September in Rockford?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September in Rockford?
Average temperature in September
Rockford, MN
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (19.8°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (7.2°F).
Average pressure in September
Rockford, MN
- Average pressure in September: 29.99"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Rockford, MN
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).
Average humidity in September
Rockford, MN
- Average humidity in September: 74%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and May (71%).
Average rainfall in September
Rockford, MN
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is June (3.62").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
Rockford, MN
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is June (16.5 days).
The month with the least rainy days is January (2.5 days).
Average snowfall in September
Rockford, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Rockford, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rockford, MN
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in September
Rockford, MN
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is December (17.8 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in September
Rockford, MN
- Average UV index in September: 4
The months with the highest UV index are June and 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
Rockford, MN
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in September
Rockford, MN
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Rockford, Minnesota, USA
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