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
Deventer marks the onset of September with an average high-temperature of a warm 81.7°F (27.6°C), subtly divergent from August's 86.2°F (30.1°C). During the month of September, Deventer experiences a steady low-temperature average of 62.2°F (16.8°C).Heat index
During September, the heat index is calculated to be a tropical 86°F (30°C). With extended exposure and activity, one might feel exhausted and experience heat cramps.Heat index details are generally centered around shaded locations and a mild breeze. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
Humidity
In September, the average relative humidity in Deventer, Missouri, is 72%.Rainfall
The month with the least rainfall in Deventer is September, when the rain falls for 11.5 days and typically collects 1.42" (36mm) of precipitation.Snowfall
In Deventer, Missouri, snow does not fall in April through October.Daylight
The average length of the day in September in Deventer is 12h and 24min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:24 pm. On the last day of September, in Deventer, sunrise is at 6:51 am and sunset at 6:41 pm CDT.
Sunshine
In September, the average sunshine is 9.7h.UV index
In Deventer, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: During September, 5 as the daily maximum UV index converts into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Deventer in September?
What is the average humidity in September in Deventer?
What is the driest month in Deventer?
How much does it rain in Deventer in September?
When it does not snow in Deventer?
What is the average length of the day in September in Deventer?
When is the sunrise / sunset in September in Deventer?
How many hours of sunshine does Deventer have in September?
What is the UV index intensity in September in Deventer?
Average temperature in September
Deventer, MO
- Average high temperature in September: 81.7°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (42.3°F).
- Average low temperature in September: 62.2°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).
Average pressure in September
Deventer, MO
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Deventer, MO
- Average wind speed in September: 6.4mph
The windiest month (with the highest average wind speed) is February (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Deventer, MO
- Average humidity in September: 72%
The months with the highest relative humidity are March and May (78%).
The month with the lowest relative humidity is October (68%).
Average rainfall in September
Deventer, MO
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is March (4.21").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in September
Deventer, MO
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is November (10.1 days).
Average snowfall in September
Deventer, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.54").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Deventer, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Deventer, MO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Deventer, MO
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is October (18.8 days).
The month with the least sunshine days is March (12.3 days).
Average UV index in September
Deventer, MO
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Deventer, MO
- Average cloud cover in September: 26
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 25).
Average visibility in September
Deventer, 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).
Deventer, Missouri, USA
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