September weather forecastLacona, IA
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Lacona, Iowa, with an average temperature varying between 56.3°F (13.5°C) and 75.7°F (24.3°C).Temperature
A moderate decline in average high-temperatures is noted in September, moving from a moderately hot 81.7°F (27.6°C) in August to a still warm 75.7°F (24.3°C). In the month of September, the nighttime temperature dips to a steady average of 56.3°F (13.5°C).Humidity
In September, the average relative humidity in Lacona is 77%.Rainfall
In Lacona, in September, during 11.5 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. In Lacona, during the entire year, the rain falls for 131.1 days and collects up to 25.71" (653mm) of precipitation.Snowfall
June through September are months without snowfall in Lacona.Daylight
In September, the average length of the day in Lacona is 12h and 28min.On the first day of the month, sunrise is at 6:40 am and sunset at 7:45 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:56 pm CDT.
Sunshine
In September, the average sunshine in Lacona is 9.2h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 4 in September translates into this advice:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Direct Sun exposure should be minimized especially during midday when radiation is most intense. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lacona, IA
- Average high temperature in September: 75.7°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (16°F).
Average pressure in September
Lacona, IA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Lacona, IA
- Average wind speed in September: 8.1mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in September
Lacona, IA
- Average humidity in September: 77%
The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Lacona, IA
- Average rainfall in September: 2.72"
The wettest month (with the highest rainfall) is June (3.74").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in September
Lacona, IA
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is January (4.7 days).
Average snowfall in September
Lacona, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.13").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Lacona, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Lacona, IA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Lacona, IA
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in September
Lacona, IA
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Lacona, IA
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in September
Lacona, IA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, September, October, November and December (6mi).
The months with the lowest visibility are January and August (5mi).
