September weather forecast
Jefferson City, MO

The State Capitol building surrounded by a beautiful park in Jefferson City, Missouri
The State Capitol building surrounded by a beautiful park in Jefferson City, Missouri

Weather in September

September, the first month of the autumn in Jefferson City, is still a warm month, with temperature in the range of an average low of 59.2°F (15.1°C) and an average high of 80.1°F (26.7°C).

Temperature

In Jefferson City, the average high-temperature in September slightly decreases from a hot 87.4°F (30.8°C) in August to a moderately hot 80.1°F (26.7°C). In September, the average low-temperature is 59.2°F (15.1°C).

Humidity

In Jefferson City, Missouri, the average relative humidity in September is 73%.

Rainfall

In Jefferson City, it is raining for 7 days, with typically 0.55" (14mm) of accumulated precipitation. Throughout the year, there are 93.7 rainfall days, and 9.29" (236mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 6:37 am and sunset at 7:39 pm. On the last day of September, in Jefferson City, sunrise is at 7:03 am and sunset at 6:53 pm CDT.

Sunshine

The average sunshine in September is 9.5h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Jefferson City?

In September, in Jefferson City, Missouri, the average high-temperature is 80.1°F (26.7°C), and the average low-temperature is 59.2°F (15.1°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, in August is calculated to be 100.4°F (38°C).

What is the average humidity in September in Jefferson City?

In Jefferson City, Missouri, the average relative humidity in September is 73%.

How many days does it rain in September in Jefferson City?

In September, in Jefferson City, Missouri, the rain falls for 7 days. Throughout September, 0.55" (14mm) of precipitation is accumulated.

When it does not snow in Jefferson City?

April through October are months without snowfall in Jefferson City.

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

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

When is the sunrise / sunset in September in Jefferson City?

On the first day of September, sunrise is at 6:37 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:53 pm CDT.

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

In September, the average sunshine duration is 9.5h.

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

In September, the average daily maximum UV index in Jefferson City is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Jefferson City, MO

Average temperature in September - Jefferson City, MO
  • Average high temperature in September: 80.1°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (38.5°F).

  • Average low temperature in September: 59.2°F

The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

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Average pressure in September
Jefferson City, MO

Average pressure in September - Jefferson City, 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).

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Average wind speed in September
Jefferson City, MO

Average wind speed in September - Jefferson City, MO
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

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Average humidity in September
Jefferson City, MO

Average humidity in September - Jefferson City, MO
  • Average humidity in September: 73%

The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in September
Jefferson City, MO

Average rainfall in September - Jefferson City, MO
  • Average rainfall in September: 0.55"

The wettest month (with the highest rainfall) is May (1.3").
The driest month (with the least rainfall) is November (0.47").

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Average rainfall days in September
Jefferson City, MO

Average rainfall days in September - Jefferson City, MO
  • Average rainfall days in September: 7 days

The month with the highest number of rainy days is May (11.3 days).
The month with the least rainy days is January (4 days).

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Average snowfall in September
Jefferson City, MO

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

The month with the highest snowfall is January (0.71").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Jefferson City, MO

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

The month with the highest number of snowfall days is January (5.2 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
Jefferson City, MO

Average daylight in September / Average sunshine in September - Jefferson City, MO
  • Average daylight in September: 12h and 25min

The month with the longest days is June (Average daylight: 14h and 49min).
The month with the shortest days is December (Average daylight: 9h and 32min).

  • Average sunshine in September: 9h and 30min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

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Average sunshine days in September
Jefferson City, MO

Average sunshine days in September - Jefferson City, MO
  • Average sunshine days in September: 20.7 days

The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is May (16.7 days).

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Average UV index in September
Jefferson City, MO

Average UV index in September - Jefferson City, 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).

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Average cloud cover in September
Jefferson City, MO

Average cloud cover in September - Jefferson City, MO
  • Average cloud cover in September: 30

The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are June and August (Cloud cover 28).

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Average visibility in September
Jefferson City, MO

Average visibility in September - Jefferson City, 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).

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