September weather forecastLuther, IA
September
Weather in September
September, the first month of the autumn in Luther, is also a moderately hot month, with an average temperature varying between 75°F (23.9°C) and 55.9°F (13.3°C).Temperature
The arrival of September suggests a slight decrease in the average high-temperature, moving from a moderately hot 80.8°F (27.1°C) in August to a still warm 75°F (23.9°C). Luther's temperature lowers to a mean of 55.9°F (13.3°C) during the nights in September.Humidity
The average relative humidity in September is 76%.Rainfall
In Luther, during September, the rain falls for 11.9 days and regularly aggregates up to 3.03" (77mm) of precipitation. In Luther, during the entire year, the rain falls for 130.8 days and collects up to 26.57" (675mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Luther, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:41 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 6:58 pm CDT.
Sunshine
In September, the average sunshine is 9.2h.UV index
In Luther, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: In September, a regular UV index of 4 translates into these guidelines:
Act with care - The suggestion to avoid sunburn is emphasized. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Luther, IA
- Average high temperature in September: 75°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (26.8°F).
- Average low temperature in September: 55.9°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 (13.8°F).
Average pressure in September
Luther, IA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Luther, IA
- Average wind speed in September: 8.1mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity in September
Luther, 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 (70%).
Average rainfall in September
Luther, IA
- Average rainfall in September: 3.03"
The wettest month (with the highest rainfall) is May (4.13").
The driest months (with the least rainfall) are January and February (0.87").
Average rainfall days in September
Luther, IA
- Average rainfall days in September: 11.9 days
The months with the highest number of rainy days are May and June (17.5 days).
The month with the least rainy days is February (3.6 days).
Average snowfall in September
Luther, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.13").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Luther, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Luther, 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 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 6min).
Average sunshine days in September
Luther, IA
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is December (19 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in September
Luther, 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, February, October, November and December (UV index 2).
Average cloud cover in September
Luther, IA
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July and September (Cloud cover 30).
Average visibility in September
Luther, IA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
