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 average high-temperature shows a slight dip in September, from August's 84.4°F (29.1°C) to a still warm 78.3°F (25.7°C). In the month of September, the nighttime temperature dips to a steady average of 58.8°F (14.9°C).Humidity
The average relative humidity in September is 76%.Rainfall
In Napoleon, Missouri, in September, it is raining for 12 days, with typically 2.48" (63mm) of accumulated precipitation. In Napoleon, during the entire year, the rain falls for 136.3 days and collects up to 27.28" (693mm) of precipitation.Snowfall
April, June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:45 am and sunset at 7:46 pm. On the last day of September, in Napoleon, sunrise is at 7:12 am and sunset at 6:59 pm CDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
In Napoleon, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: A daily maximum UV index of 5 in September translates into the following instructions:
Make use of precautions - It is urged to ward off sun damage. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. 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 usual temperature for Napoleon in September?
What is the average humidity in September?
How much does it rain in Napoleon in September?
When it does not snow in Napoleon?
Does it snow in September?
How many hours of daylight does Napoleon have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Napoleon have in September?
How high is the UV index in September?
Average temperature in September
Napoleon, MO
- Average high temperature in September: 78.3°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (36.5°F).
- Average low temperature in September: 58.8°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).
Average pressure in September
Napoleon, MO
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Napoleon, MO
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is March (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Napoleon, MO
- Average humidity in September: 76%
The months with the highest relative humidity are May and June (79%).
The months with the lowest relative humidity are October and November (71%).
Average rainfall in September
Napoleon, MO
- Average rainfall in September: 2.48"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in September
Napoleon, MO
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in September
Napoleon, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.35").
The months with the least snowfall are April, June, July, August and September (0").
Average snowfall days in September
Napoleon, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Napoleon, MO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in September
Napoleon, MO
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is December (22 days).
The months with the least sunshine days are May and June (11.6 days).
Average UV index in September
Napoleon, MO
- 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, November and December (UV index 2).
Average cloud cover in September
Napoleon, MO
- Average cloud cover in September: 29
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in September
Napoleon, MO
- 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).
Napoleon, Missouri, USA
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