September weather forecast
Kansas City, MO

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YearJFMAMJJASeptemberOND
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Panorama of Kansas City, Missouri in the US, with an old statue of a scout boy looking towards the city
Panorama of Kansas City, Missouri in the US, with an old statue of a scout boy looking towards the city

Weather in September

September brings a whiff of change in Kansas City's air as the city prepares to bid adieu to summer. The advent of fall gradually replaces the sultry heat with a comfortable chill. As the month progresses, the number of daylight hours shrink, a subtle reminder of the onset of fall. September also marks a decrease in rainfall, providing dry and clear days. With autumn leaves beginning to scatter around, Kansas City witnesses a beautiful changeover.

Temperature

With September's onset, the weather reveals a slight temperature decrease, transitioning from a tropical 88.5°F (31.4°C) in August to a warm 80.1°F (26.7°C). Kansas City sees an average low-temperature of 60.4°F (15.8°C) during September.

Humidity

In Kansas City, Missouri, the average relative humidity in September is 70.4%.

Rainfall

In September, the rain falls for 8.1 days. Throughout September, 4.17" (106mm) of precipitation is accumulated. In Kansas City, during the entire year, the rain falls for 90.8 days and collects up to 39.06" (992mm) of precipitation.

Snowfall

May through September are months without snowfall in Kansas City, Missouri.

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of the month, sunrise is at 6:47 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:14 am and sunset at 7:01 pm CDT.

Sunshine

The average sunshine in September is 8h.

UV index

In September, the average daily maximum UV index is 7. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Shun overexposure. Protection from sun ravages is indispensable. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
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Frequently asked questions

What are the temperatures in Kansas City in September?

In September, the average high-temperature and low-temperature are 80.1°F (26.7°C) and 60.4°F (15.8°C) respectively. In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is appraised at 102.2°F (39°C).

What is the average humidity in September in Kansas City?

The average relative humidity in September in Kansas City, Missouri, is 70.4%.

How much does it rain in Kansas City in September?

In Kansas City, Missouri, during September, the rain falls for 8.1 days and regularly aggregates up to 4.17" (106mm) of precipitation.

When it does not snow in Kansas City?

In Kansas City, snow does not fall in May through September.

Does it snow in Kansas City in September?

In Kansas City, Missouri, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Kansas City?

In September, the average day length is 12h and 26min.

What time are sunrise and sunset in September in Kansas City?

In September, on the first day of the month, sunrise is at 6:47 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 7:01 pm CDT.

How many hours of sunshine does Kansas City have in September?

In September, the average sunshine duration in Kansas City is 8h.

What is the UV index reading in September in Kansas City?

The average daily maximum UV index in September in Kansas City is 7. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJASeptemberOND
Aug
September
Oct
Average high temperature
88.6°F 31.4°C
80°F 26.7°C
67.8°F 19.9°C
Average low temperature
70.2°F 21.2°C
60.5°F 15.8°C
48.9°F 9.4°C
Average humidity
70%
70.4%
67.1%
Average rainfall
4.4" 112mm
4.2" 107mm
3.5" 89mm
Average rainfall days
7.5
8.1
7.5
Average snowfall
0" 0mm
0" 0mm
0.3" 8mm
Average snowfall days
0
0
0.1
Average daylight
13h 4min
12h 2min
11h 1min
Average sunshine
9h 3min
8h 0min
6h 5min
Average UV index
9
7
4

Average temperature in September
Kansas City, MO

Average temperature in September - Kansas City, MO
  • Average high temperature in September: 80°F

The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (39.5°F).

  • Average low temperature in September: 60.5°F

The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (22.4°F).

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Average humidity in September
Kansas City, MO

Average humidity in September - Kansas City, MO
  • Average humidity in September: 70.4%

The month with the highest relative humidity is December (71%).
The month with the lowest relative humidity is April (62.9%).

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Average rainfall in September
Kansas City, MO

Average rainfall in September - Kansas City, MO
  • Average rainfall in September: 4.2"

The wettest month (with the highest rainfall) is June (5.5").
The driest month (with the least rainfall) is January (1.1").

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Average rainfall days in September
Kansas City, MO

Average rainfall days in September - Kansas City, MO
  • Average rainfall days in September: 8.1 days

The month with the highest number of rainy days is May (11 days).
The month with the least rainy days is January (4.8 days).

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Average snowfall in September
Kansas City, MO

Average snowfall in September - Kansas City, MO
  • Average snowfall in September: 0"

The month with the highest snowfall is December (4.4").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Kansas City, MO

Average snowfall days in September - Kansas City, MO
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and December (2.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Kansas City, MO

Average daylight in September / Average sunshine in September - Kansas City, 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: 8h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).

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Average UV index in September
Kansas City, MO

Average UV index in September - Kansas City, MO
  • Average UV index in September: 7

The month with the highest UV index is July (UV index 10).
The months with the lowest UV index are January and December (UV index 2).

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Kansas City, Missouri, USA

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