September weather forecastRolfe, IA
September
Weather in September
September, the first month of the autumn in Rolfe, is also a moderately hot month, with an average temperature fluctuating between 73.9°F (23.3°C) and 54.5°F (12.5°C).Temperature
September observes an average high-temperature of a still moderately hot 73.9°F (23.3°C), marking an insignificant difference from August's 78.8°F (26°C). An average low-temperature of 54.5°F (12.5°C) is recorded during the nights in September.Humidity
In September, the average relative humidity is 74%.Rainfall
In Rolfe, Iowa, in September, it is raining for 9.4 days, with typically 0.83" (21mm) of accumulated precipitation. In Rolfe, during the entire year, the rain falls for 93.7 days and collects up to 9.29" (236mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In Rolfe, the average length of the day in September is 12h and 29min.On the first day of September in Rolfe, sunrise is at 6:43 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:00 pm CDT.
Sunshine
In September, the average sunshine is 9.2h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The UV index of 4 in September translates into these instructions:
Ensure safety - Recommendations to avert sunburn are presented. Direct Sun exposure should be minimized especially during midday when radiation is most intense. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rolfe, IA
- Average high temperature in September: 73.9°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (24.4°F).
- Average low temperature in September: 54.5°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (11.8°F).
Average pressure in September
Rolfe, 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
Rolfe, IA
- Average wind speed in September: 8.6mph
The windiest month (with the highest average wind speed) is April (11mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).
Average humidity in September
Rolfe, IA
- Average humidity in September: 74%
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April and October (68%).
Average rainfall in September
Rolfe, IA
- Average rainfall in September: 0.83"
The wettest month (with the highest rainfall) is May (1.38").
The driest month (with the least rainfall) is January (0.28").
Average rainfall days in September
Rolfe, IA
- Average rainfall days in September: 9.4 days
The month with the highest number of rainy days is May (13 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in September
Rolfe, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.05").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Rolfe, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rolfe, IA
- Average daylight in September: 12h and 30min
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 6min).
- Average sunshine in September: 9h and 12min
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 6min).
Average sunshine days in September
Rolfe, IA
- Average sunshine days in September: 18.6 days
The month with the most sunshine days is November (23.3 days).
The month with the least sunshine days is June (14.7 days).
Average UV index in September
Rolfe, 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, November and December (UV index 2).
Average cloud cover in September
Rolfe, IA
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in September
Rolfe, IA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
