Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
In Balfour, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's moderately hot 82.4°F (28°C) to a still warm 76.6°F (24.8°C). Balfour's nighttime temperature during September is consistently averaged at a moderate 57.4°F (14.1°C).Humidity
In September, the average relative humidity is 73%.Rainfall
In Balfour, in September, it is raining for 12.4 days, with typically 2.48" (63mm) of accumulated precipitation. Throughout the year, there are 129.5 rainfall days, and 27.48" (698mm) of precipitation is accumulated.Snowfall
In Balfour, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:50 am and sunset at 7:54 pm. On the last day of September, sunrise is at 7:19 am and sunset at 7:05 pm CDT.
Sunshine
The average sunshine in September in Balfour is 9h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September in Balfour?
When are sunrise and sunset in September?
How long on average sun shines in September in Balfour?
What is the UV index reading in September?
Average temperature in September
Balfour, IA
- Average high temperature in September: 76.6°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in September: 57.4°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in September
Balfour, IA
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Balfour, IA
- Average wind speed in September: 8.2mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in September
Balfour, IA
- Average humidity in September: 73%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is October (67%).
Average rainfall in September
Balfour, IA
- Average rainfall in September: 2.48"
The wettest month (with the highest rainfall) is June (4.57").
The driest months (with the least rainfall) are January and February (0.83").
Average rainfall days in September
Balfour, IA
- Average rainfall days in September: 12.4 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in September
Balfour, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.9").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Balfour, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Balfour, IA
- Average daylight in September: 12h and 3min
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 0min
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 42min).
Average sunshine days in September
Balfour, IA
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is June (10.6 days).
Average UV index in September
Balfour, IA
- Average UV index in September: 5
The months with the highest UV index are June, July and August (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
Balfour, IA
- Average cloud cover in September: 28
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Balfour, IA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Balfour, Iowa, USA
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