September weather forecast
Leavenworth, KS

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Weather in September

September marks the commencement of fall in Leavenworth. Autumn renders a gradual yet noticeable drop in temperature, resonating well with the crisp fall mornings. The middle-of-the-road weather paves the way for comfortable outdoor activities, making it a preference for many. Rainfall registers a slight decrease to 2.52" (64mm) on average, while the count of sunshine hours slightly reduces from August. The change of season is embraced with both daytime and nighttime temperatures dropping, setting the scene for a dramatic fall foliage display.

Temperature

September sees a slight reduction in average high-temperature, with a shift from a moderately hot 84.6°F (29.2°C) in August to a still warm 77.9°F (25.5°C). Leavenworth, during the nights of September, experiences an average temperature drop to a refreshing 59.2°F (15.1°C).

Humidity

In September, the average relative humidity in Leavenworth is 75%.

Rainfall

In Leavenworth, in September, it is raining for 12.4 days, with typically 2.52" (64mm) of accumulated precipitation. In Leavenworth, Kansas, during the entire year, the rain falls for 130.5 days and collects up to 26.38" (670mm) of precipitation.

Snowfall

June through September are months without snowfall in Leavenworth.

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of September in Leavenworth, sunrise is at 6:48 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:03 pm CDT.

Sunshine

In September, the average sunshine is 9.3h.

UV index

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
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Frequently asked questions

What is the usual temperature for Leavenworth in September?

The average high-temperature and low-temperature in Leavenworth during September are 77.9°F (25.5°C) and 59.2°F (15.1°C) respectively. The average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is evaluated at 95°F (35°C).

What is the average humidity in September in Leavenworth?

In Leavenworth, the average relative humidity in September is 75%.

How many days does it rain in September in Leavenworth?

In Leavenworth, in September, during 12.4 rainfall days, 2.52" (64mm) of precipitation is typically accumulated.

When it does not snow in Leavenworth?

June through September are months without snowfall.

Does it snow in Leavenworth in September?

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

How many hours of daylight does Leavenworth have in September?

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

When is the sunrise / sunset in September in Leavenworth?

In September, on the first day of the month, sunrise is at 6:48 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:03 pm CDT.

How long on average sun shines in September in Leavenworth?

The average sunshine duration in September in Leavenworth, Kansas, is 9.3h.

How high is the UV index in September in Leavenworth?

The average daily maximum UV index in September in Leavenworth, Kansas, is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
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
Leavenworth, KS

Average temperature in September - Leavenworth, KS
  • Average high temperature in September: 77.9°F

The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (36.1°F).

  • Average low temperature in September: 59.2°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).

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Average pressure in September
Leavenworth, KS

Average pressure in September - Leavenworth, KS
  • Average pressure in September: 30"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in September
Leavenworth, KS

Average wind speed in September - Leavenworth, KS
  • Average wind speed in September: 7.3mph

The windiest months (with the highest average wind speed) are February and March (9.9mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).

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Average humidity in September
Leavenworth, KS

Average humidity in September - Leavenworth, KS
  • Average humidity in September: 75%

The months with the highest relative humidity are May and June (79%).
The month with the lowest relative humidity is October (69%).

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Average rainfall in September
Leavenworth, KS

Average rainfall in September - Leavenworth, KS
  • Average rainfall in September: 2.52"

The wettest month (with the highest rainfall) is May (3.94").
The driest month (with the least rainfall) is February (0.87").

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Average rainfall days in September
Leavenworth, KS

Average rainfall days in September - Leavenworth, KS
  • Average rainfall days in September: 12.4 days

The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is January (4.3 days).

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Average snowfall in September
Leavenworth, KS

Average snowfall in September - Leavenworth, KS
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.32").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Leavenworth, KS

Average snowfall days in September - Leavenworth, KS
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Leavenworth, KS

Average daylight in September / Average sunshine in September - Leavenworth, KS
  • 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 30min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).

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Average sunshine days in September
Leavenworth, KS

Average sunshine days in September - Leavenworth, KS
  • Average sunshine days in September: 16.2 days

The month with the most sunshine days is January (22 days).
The month with the least sunshine days is June (12.3 days).

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Average UV index in September
Leavenworth, KS

Average UV index in September - Leavenworth, KS
  • 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).

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Average cloud cover in September
Leavenworth, KS

Average cloud cover in September - Leavenworth, KS
  • Average cloud cover in September: 29

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 26).

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Average visibility in September
Leavenworth, KS

Average visibility in September - Leavenworth, KS
  • 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).

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Leavenworth, Kansas, USA

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