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's onset records a minor alteration in the average high-temperature to a pleasant 72.5°F (22.5°C) from August's 77.5°F (25.3°C). Nighttime temperature in Rockford lowers to an average of 53.4°F (11.9°C) in September.Humidity
The average relative humidity in September in Rockford is 78%.Rainfall
In Rockford, in September, it is raining for 11.5 days, with typically 2.52" (64mm) of accumulated precipitation. Throughout the year, there are 129.5 rainfall days, and 25.98" (660mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Rockford, the average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:37 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:54 pm CDT.
Sunshine
In Rockford, the average sunshine in September is 8.9h.UV index
In Rockford, the average daily maximum UV index in September 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: The maximum daily UV index, 4 in September, converts into the following recommendations:
Take precautions - Protection against sunburn is recommended. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Frequently asked questions
What is the usual temperature for Rockford in September?
What is the average humidity in September in Rockford?
How much does it rain in Rockford in September?
When it does not snow in Rockford?
Does it snow in Rockford in September?
What is the average length of the day in September in Rockford?
What time are sunrise and sunset in September in Rockford?
How long on average sun shines in September in Rockford?
What is the UV index reading in September in Rockford?
Average temperature in September
Rockford, IA
- Average high temperature in September: 72.5°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 (22.5°F).
- Average low temperature in September: 53.4°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (10°F).
Average pressure in September
Rockford, IA
- Average pressure in September: 30.01"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, IA
- Average wind speed in September: 8.3mph
The windiest months (with the highest average wind speed) are January and April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in September
Rockford, IA
- Average humidity in September: 78%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Rockford, IA
- Average rainfall in September: 2.52"
The wettest month (with the highest rainfall) is June (3.98").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in September
Rockford, IA
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (3 days).
Average snowfall in September
Rockford, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Rockford, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.7 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, IA
- 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: 8h and 5min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
Rockford, IA
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in September
Rockford, IA
- 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 and December (UV index 1).
Average cloud cover in September
Rockford, IA
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Rockford, IA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
Rockford, Iowa, USA
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