September weather forecast
Jefferson City, MO

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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 whispers the enchanting tales of autumn into the Jefferson City canvas. The weather carries a whiff of a blend - the remnants of summer with the hints of oncoming fall. Favorable weather conditions present themselves with average temperatures going down to 59.2°F (15.1°C) from 65.8°F (18.8°C) in August. The daylight hours reduce, prompting the advent of stunning autumnal hues. Jefferson City embraces September as a spellbinding transitional interlude between summer and autumn.

Temperature

As August makes way for September, Jefferson City's average high-temperature eases from a hot 87.4°F (30.8°C) to a moderately hot 80.1°F (26.7°C). The average low-temperature of 59.2°F (15.1°C) is witnessed during September.

Humidity

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

Rainfall

In Jefferson City, in September, it is raining for 7 days, with typically 0.55" (14mm) of accumulated precipitation. In Jefferson City, Missouri, during the entire year, the rain falls for 93.7 days and collects up to 9.29" (236mm) of precipitation.

Snowfall

In Jefferson City, snow does not fall in April through October.

Daylight

In Jefferson City, the average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 6:38 am and sunset at 7:38 pm. On the last day of September, in Jefferson City, sunrise is at 7:04 am and sunset at 6:52 pm CDT.

Sunshine

The average sunshine in September is 9.5h.

UV index

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.
Note: A maximum high daily UV index of 5 during September translates into the following directions:
Be vigilant - A duty to shield skin and eyes from injury exists. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
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Frequently asked questions

What is the usual temperature for Jefferson City in September?

In Jefferson City, 80.1°F (26.7°C) is the average high-temperature and 59.2°F (15.1°C) is the average low-temperature during September. The average heat index (a.k.a. 'real feel', 'feels like'), which factors the actual air temperature with the relative humidity, in August is evaluated at 100.4°F (38°C).

What is the average humidity in September in Jefferson City?

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

How much does it rain in Jefferson City in September?

In Jefferson City, in September, during 7 rainfall days, 0.55" (14mm) of precipitation is typically accumulated.

When it does not snow in Jefferson City?

April through October are months without snowfall in Jefferson City, Missouri.

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

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

When are sunrise and sunset in September in Jefferson City?

In September, on the first day of the month, sunrise is at 6:38 am and sunset at 7:38 pm. On the last day of the month, in Jefferson City, Missouri, sunrise is at 7:04 am and sunset at 6:52 pm CDT.

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

The average sunshine duration in September in Jefferson City, Missouri, is 9.5h.

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

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health risk 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
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 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 3min

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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Jefferson City, Missouri, USA

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