September weather forecastCoin, IA
September
Weather in September
September, the first month of the autumn in Coin, is still a warm month, with temperature in the range of an average high of 76.6°F (24.8°C) and an average low of 57°F (13.9°C).Temperature
September's onset introduces a mild reduction in the average high-temperature, from a warm 82.2°F (27.9°C) in August to a still moderately hot 76.6°F (24.8°C). Coin records a mean low-temperature of 57°F (13.9°C) in September.Humidity
In Coin, the average relative humidity in September is 75%.Rainfall
In September, the rain falls for 10.1 days. Throughout September, 1.34" (34mm) of precipitation is accumulated. In Coin, Iowa, during the entire year, the rain falls for 114.9 days and collects up to 18.39" (467mm) of precipitation.Snowfall
In Coin, snow does not fall in May through September.Daylight
In Coin, Iowa, the average length of the day in September is 12h and 27min.On the first day of September in Coin, sunrise is at 6:48 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:04 pm CDT.
Sunshine
The average sunshine in September is 9.3h.UV index
In Coin, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 5 during September leads to these advisories:
Guard yourself - An obligation to protect skin and eyes from harm exists. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Coin, IA
- Average high temperature in September: 76.6°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in September: 57°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).
Average pressure in September
Coin, IA
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Coin, IA
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is March (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in September
Coin, IA
- Average humidity in September: 75%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is October (69%).
Average rainfall in September
Coin, IA
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is June (3.39").
The driest month (with the least rainfall) is February (0.43").
Average rainfall days in September
Coin, IA
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is February (3.4 days).
Average snowfall in September
Coin, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Coin, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Coin, IA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in September
Coin, IA
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in September
Coin, IA
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Coin, IA
- Average cloud cover in September: 28
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Coin, IA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
