Jefferson City
Missouri, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Jefferson City, MO

The scenic view of the State Capitol building in Jefferson City, Missouri, surrounded by a beautiful park, reflected in a pool of water nearby
The scenic view of the State Capitol building in Jefferson City, Missouri, surrounded by a beautiful park, reflected in a pool of water nearby
The first month of the autumn, September, is also a moderately hot month in Jefferson City, Missouri, with average temperature varying between 55.9°F (13.3°C) and 79.9°F (26.6°C).

Temperature

In Jefferson City, the average high-temperature in September marginally drops, from a hot 87.8°F (31°C) in August, to a moderately hot 79.9°F (26.6°C). The average low-temperature, in Jefferson City, is 55.9°F (13.3°C).

Rainfall

In Jefferson City, Missouri, in September, during 8 rainfall days, 4.1" (105.4mm) of precipitation is typically accumulated. In Jefferson City, during the entire year, the rain falls for 109 days and collects up to 43" (1093mm) of precipitation.

Snowfall

Throughout the year, 13.8" (350.5mm) of snow is accumulated.

Daylight

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

Sunshine

In September, the average sunshine is 8h.

UV index

In September, the average daily maximum UV index in Jefferson City is 7. A UV Index estimate of 6 to 7 represents a high health hazard from the exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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.

What is the temperature in September in Jefferson City?

In Jefferson City, Missouri, in September, the average high-temperature is 79.9°F (26.6°C), and the average low-temperature is 55.9°F (13.3°C).

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

In Jefferson City, Missouri, in September, during 8 rainfall days, 4.1" (105.4mm) of precipitation is typically accumulated.

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

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

How long on average sun shines in September in Jefferson City?

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

How high is the UV index in September in Jefferson City?

In September, the average daily maximum UV index in Jefferson City is 7. A UV Index reading of 6 to 7 represents a high health threat from the exposure to the Sun's UV rays.
Average temperature in September - Jefferson City, MO
  • Average high temperature in September: 79.8°F

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (39.9°F).

  • Average low temperature in September: 56°F

The month with the highest average low temperature is July (67.2°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).

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

The wettest month (with the highest rainfall) is May (5.2").
The driest month (with the lowest rainfall) is January (1.9").

Average rainfall days in September - Jefferson City, MO
  • Average rainfall days in September: 8 days

The month with the highest number of rainy days is May (12 days).
The month with the lowest number of rainy days is January (7 days).

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

The month with the highest snowfall is January (4.8").
Months with the lowest snowfall are May, June, July, August, September and October (0").

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 shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 8h

Months with most sunshine are June and July (Average sunshine: 10h).
Months with least sunshine are January, November and December (Average sunshine: 5).

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

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