September weather forecastAlexander, IA
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Alexander, Iowa, with an average temperature fluctuating between 72.7°F (22.6°C) and 54.3°F (12.4°C).Temperature
The transition into September shows a subtle variation to an agreeable 72.7°F (22.6°C) from August's 77.9°F (25.5°C) in the average high-temperature. Alexander, during the nights of September, experiences an average temperature drop to a cool 54.3°F (12.4°C).Humidity
The average relative humidity in September is 77%.Rainfall
In Alexander, in September, it is raining for 11.8 days, with typically 2.36" (60mm) of accumulated precipitation. Throughout the year, there are 136.3 rainfall days, and 26.18" (665mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Alexander.Daylight
The average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:39 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 6:56 pm CDT.
Sunshine
In Alexander, the average sunshine in September is 9.1h.UV index
In Alexander, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 4 during September translates into the following guidance:
Undertake precautions - Obligation exists to protect against skin and eye damage. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Alexander, IA
- Average high temperature in September: 72.7°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (23.4°F).
- Average low temperature in September: 54.3°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).
Average pressure in September
Alexander, IA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Alexander, IA
- Average wind speed in September: 8.6mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).
Average humidity in September
Alexander, IA
- Average humidity in September: 77%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Alexander, IA
- Average rainfall in September: 2.36"
The wettest month (with the highest rainfall) is June (3.98").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in September
Alexander, IA
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is June (18.6 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in September
Alexander, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Alexander, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Alexander, 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 6min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Alexander, IA
- Average sunshine days in September: 15.8 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is June (10 days).
Average UV index in September
Alexander, IA
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Alexander, IA
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 32).
Average visibility in September
Alexander, 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).
