September weather forecast
Defiance, MO

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Weather in September

September, the first month of the autumn in Defiance, is also a moderately hot month, with an average temperature fluctuating between 59.5°F (15.3°C) and 79.3°F (26.3°C).

Temperature

The arrival of September is marked by a minor reduction in average high-temperature, sliding from 85.5°F (29.7°C) in August to a still moderately hot 79.3°F (26.3°C). Defiance observes an average low-temperature of 59.5°F (15.3°C) during September.

Humidity

In Defiance, the average relative humidity in September is 74%.

Rainfall

In September, the rain falls for 11.9 days. Throughout September, 2.13" (54mm) of precipitation is accumulated. Throughout the year, there are 152.1 rainfall days, and 32.01" (813mm) of precipitation is accumulated.

Snowfall

In Defiance, snow does not fall in May through October.

Daylight

In September, the average length of the day in Defiance, Missouri, is 12h and 25min.
On the first day of the month, sunrise is at 6:33 am and sunset at 7:32 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:46 pm CDT.

Sunshine

In September, the average sunshine is 9.6h.

UV index

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 rays for the ordinary person.
Note: The maximum daily UV index of 5 during September translates into the following directions:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. To protect against the Sun's most potent rays, avoid direct exposure around midday. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.

Frequently asked questions

What are the temperatures in September?

In Defiance, 79.3°F (26.3°C) is the average high-temperature and 59.5°F (15.3°C) is the average low-temperature during September. The average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, in August is estimated at 96.8°F (36°C).

What is the average humidity in September?

In Defiance, the average relative humidity in September is 74%.

How many days does it rain in September?

In Defiance, in September, during 11.9 rainfall days, 2.13" (54mm) of precipitation is typically accumulated.

When it does not snow?

In Defiance, snow does not fall in May through October.

What is the average length of the day in September?

In September, the average day length is 12h and 25min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:33 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:46 pm CDT.

How many hours of sunshine does Defiance have in September?

The average sunshine duration in September is 9.6h.

How high is the UV index in September?

In Defiance, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Defiance, MO

Average temperature in September - Defiance, MO
  • Average high temperature in September: 79.3°F

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (37.4°F).

  • Average low temperature in September: 59.5°F

The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).

Average pressure in September
Defiance, MO

Average pressure in September - Defiance, 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 (29.92"Hg).

Average wind speed in September
Defiance, MO

Average wind speed in September - Defiance, MO
  • Average wind speed in September: 6mph

The windiest months (with the highest average wind speed) are January and February (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

Average humidity in September
Defiance, MO

Average humidity in September - Defiance, MO
  • Average humidity in September: 74%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (72%).

Average rainfall in September
Defiance, MO

Average rainfall in September - Defiance, MO
  • Average rainfall in September: 2.13"

The wettest month (with the highest rainfall) is April (3.82").
The driest month (with the least rainfall) is February (1.77").

Average rainfall days in September
Defiance, MO

Average rainfall days in September - Defiance, MO
  • Average rainfall days in September: 11.9 days

The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (7.8 days).

Average snowfall in September
Defiance, MO

Average snowfall in September - Defiance, MO
  • Average snowfall in September: 0"

The month with the highest snowfall is February (3.15").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Defiance, MO

Average snowfall days in September - Defiance, MO
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (7.3 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
Defiance, MO

Average daylight in September / Average sunshine in September - Defiance, MO
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 9h and 4min

The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

Average sunshine days in September
Defiance, MO

Average sunshine days in September - Defiance, MO
  • Average sunshine days in September: 15.8 days

The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is June (10.9 days).

Average UV index in September
Defiance, MO

Average UV index in September - Defiance, 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, February, November and December (UV index 2).

Average cloud cover in September
Defiance, MO

Average cloud cover in September - Defiance, MO
  • Average cloud cover in September: 29

The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).

Average visibility in September
Defiance, MO

Average visibility in September - Defiance, 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).

Defiance, Missouri, USA

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