September weather forecastLong Grove, IA
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Long Grove, Iowa, with an average temperature ranging between max 75.2°F (24°C) and min 55.8°F (13.2°C).Temperature
September's onset brings an average high-temperature of a still moderately hot 75.2°F (24°C), showing a minute difference from August's 80.2°F (26.8°C). Long Grove records an average low of 55.8°F (13.2°C) throughout the nights in September.Humidity
The average relative humidity in September is 76%.Rainfall
In Long Grove, in September, it is raining for 8.9 days, with typically 1.02" (26mm) of accumulated precipitation. Throughout the year, there are 113.5 rainfall days, and 14.25" (362mm) of precipitation is accumulated.Snowfall
In Long Grove, snow does not fall in May through September.Daylight
In Long Grove, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:29 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:45 pm CDT.
Sunshine
In Long Grove, the average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 4 during September translates into the following guidance:
Undertake precautions - It is suggested to shield oneself from sunburn. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Long Grove, IA
- Average high temperature in September: 75.2°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure in September
Long Grove, IA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Long Grove, IA
- Average wind speed in September: 7.8mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in September
Long Grove, IA
- Average humidity in September: 76%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Long Grove, IA
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is May (2.44").
The driest month (with the least rainfall) is December (0.51").
Average rainfall days in September
Long Grove, IA
- Average rainfall days in September: 8.9 days
The month with the highest number of rainy days is May (15 days).
The month with the least rainy days is January (3.3 days).
Average snowfall in September
Long Grove, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Long Grove, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Long Grove, IA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 9h and 18min
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 54min).
Average sunshine days in September
Long Grove, IA
- Average sunshine days in September: 19.4 days
The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is June (12.9 days).
Average UV index in September
Long Grove, IA
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Long Grove, IA
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are July, August and September (Cloud cover 30).
Average visibility in September
Long Grove, 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).
