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
Bonaparte records a mild change in average high-temperature during September, easing from a moderately hot 82.6°F (28.1°C) in August to a still warm 77°F (25°C). In Bonaparte, the expected average low-temperature for September is a refreshing 57.4°F (14.1°C).Humidity
In Bonaparte, the average relative humidity in September is 75%.Rainfall
In September, the rain falls for 12 days. Throughout September, 2.28" (58mm) of precipitation is accumulated. Throughout the year, there are 145.2 rainfall days, and 28.98" (736mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September in Bonaparte, Iowa, is 12h and 27min.On the first day of September, sunrise is at 6:35 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:50 pm CDT.
Sunshine
In Bonaparte, the average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the UV index of 4 transforms into the following advice:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Bonaparte?
What is the average humidity in September in Bonaparte?
How many days does it rain in September in Bonaparte?
When it does not snow in Bonaparte?
Does it snow in Bonaparte in September?
What is the average length of the day in September in Bonaparte?
When is the sunrise / sunset in September in Bonaparte?
How long on average sun shines in September in Bonaparte?
What is the UV index intensity in September in Bonaparte?
Average temperature in September
Bonaparte, IA
- Average high temperature in September: 77°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (30.2°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 (18.3°F).
Average pressure in September
Bonaparte, IA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Bonaparte, IA
- Average wind speed in September: 7.7mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in September
Bonaparte, IA
- Average humidity in September: 75%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Bonaparte, IA
- Average rainfall in September: 2.28"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is December (1.38").
Average rainfall days in September
Bonaparte, IA
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is May (19.2 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in September
Bonaparte, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.41").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Bonaparte, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Bonaparte, IA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Bonaparte, IA
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is May (9.2 days).
Average UV index in September
Bonaparte, IA
- Average UV index in September: 4
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, November and December (UV index 2).
Average cloud cover in September
Bonaparte, IA
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July, August and September (Cloud cover 29).
Average visibility in September
Bonaparte, IA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Bonaparte, Iowa, USA
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