September weather forecast and climate
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
The first month of the autumn, September, is still a warm month in Jefferson City, Missouri, with average temperature ranging between min 59.2°F (15.1°C) and max 80.1°F (26.7°C).

Temperature

In September, the average high-temperature marginally drops, from a hot 87.4°F (30.8°C) in August, to a moderately hot 80.1°F (26.7°C). In Jefferson City, 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, in September, 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 in Jefferson City.

Daylight

In Jefferson City, Missouri, the average length of the day in September is 12.4h.

Sunshine

In September, the average sunshine in Jefferson City is 9.5h.

UV index

In Jefferson City, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Jefferson City?

In Jefferson City, Missouri, in September, the average high-temperature is 80.1°F (26.7°C), and the average low-temperature is 59.2°F (15.1°C).

What is the average humidity in September in Jefferson City?

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

How much does it rain in Jefferson City in September?

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.

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

In September, the average length of the day in Jefferson City is 12.4h.

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

In September, the average sunshine in Jefferson City, Missouri, is 9.5h.

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

In Jefferson City, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from the exposure to the Sun's UV radiation.
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).

Average pressure in September - Jefferson City, MO
  • Average pressure in September: 30.02"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.92").

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).

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%).

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").

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).

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

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

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).
Months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Jefferson City, MO
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 9.5h

The month with the most sunshine is June (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.8h).

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).

Average UV index in September - Jefferson City, MO
  • Average UV index in September: 5

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

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).
Months with the least cloud cover are June and August (Cloud cover 28).

Average visibility in September - Jefferson City, MO
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).