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
With the advent of September, Forest City's high-temperatures adjust to a pleasant 72.1°F (22.3°C), closely aligning with the preceding month. Forest City's average low-temperature in September is measured at a fresh 53.6°F (12°C).Humidity
In Forest City, the average relative humidity in September is 77%.Rainfall
In Forest City, during September, the rain falls for 12.5 days and regularly aggregates up to 2.44" (62mm) of precipitation. Throughout the year, in Forest City, there are 136.2 rainfall days, and 25.39" (645mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Forest City.Daylight
In Forest City, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:49 pm. On the last day of September, in Forest City, sunrise is at 7:11 am and sunset at 6:56 pm CDT.
Sunshine
In Forest City, the average sunshine in September is 9.1h.UV index
In September, the average daily maximum UV index in Forest City, Iowa, is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. When the Sun is at its strongest around midday, find shade and limit exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Forest City?
What is the average humidity in September in Forest City?
How many days does it rain in September in Forest City?
When it does not snow in Forest City?
Does it snow in Forest City in September?
What is the average length of the day in September in Forest City?
When are sunrise and sunset in September in Forest City?
How long on average sun shines in September in Forest City?
What is the UV index intensity in September in Forest City?
Average temperature in September
Forest City, IA
- Average high temperature in September: 72.1°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 (22.1°F).
- Average low temperature in September: 53.6°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 (9.9°F).
Average pressure in September
Forest City, IA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Forest City, IA
- Average wind speed in September: 8.6mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).
Average humidity in September
Forest City, IA
- Average humidity in September: 77%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Forest City, IA
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is June (4.21").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in September
Forest City, IA
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is June (18.8 days).
The month with the least rainy days is February (3 days).
Average snowfall in September
Forest City, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.79").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Forest City, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Forest City, 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 0min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Forest City, IA
- Average sunshine days in September: 15.1 days
The months with the most sunshine days are October and November (17.4 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in September
Forest City, 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
Forest City, IA
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Forest City, IA
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, September, October and November (6mi).
The months with the lowest visibility are January, February, July, August and December (5mi).
Forest City, Iowa, USA
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