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
The advent of September brings an average high-temperature of a still moderately hot 74.3°F (23.5°C), exhibiting minor difference from the previous month. An average temperature of 55°F (12.8°C) is recorded in Belle Plaine during the nights in September.Humidity
In Belle Plaine, the average relative humidity in September is 78%.Rainfall
In Belle Plaine, in September, it is raining for 11.9 days, with typically 2.52" (64mm) of accumulated precipitation. In Belle Plaine, Iowa, during the entire year, the rain falls for 139 days and collects up to 29.49" (749mm) of precipitation.Snowfall
June through September are months without snowfall in Belle Plaine.Daylight
The average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:42 pm. On the last day of September, sunrise is at 7:05 am and sunset at 6:51 pm CDT.
Sunshine
In Belle Plaine, the average sunshine in September is 9.2h.UV index
The average daily maximum UV index in September in Belle Plaine, Iowa, is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Belle Plaine?
What is the average humidity in September in Belle Plaine?
How much does it rain in Belle Plaine in September?
When it does not snow in Belle Plaine?
Does it snow in Belle Plaine in September?
What is the average length of the day in September in Belle Plaine?
What time are sunrise and sunset in September in Belle Plaine?
How long on average sun shines in September in Belle Plaine?
What is the UV index reading in September in Belle Plaine?
Average temperature in September
Belle Plaine, IA
- Average high temperature in September: 74.3°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 (25.9°F).
- Average low temperature in September: 55°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in September
Belle Plaine, IA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Belle Plaine, IA
- Average wind speed in September: 8.1mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in September
Belle Plaine, IA
- Average humidity in September: 78%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Belle Plaine, IA
- Average rainfall in September: 2.52"
The wettest month (with the highest rainfall) is May (4.61").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in September
Belle Plaine, IA
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is June (19.3 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in September
Belle Plaine, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Belle Plaine, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Belle Plaine, IA
- Average daylight in September: 12h and 3min
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 1min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Belle Plaine, IA
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is June (8.4 days).
Average UV index in September
Belle Plaine, 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, October, November and December (UV index 2).
Average cloud cover in September
Belle Plaine, IA
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in September
Belle Plaine, IA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
Belle Plaine, Iowa, USA
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