September weather forecast
Frontenac, MO

Share

Weather in September

The first month of the autumn, September, is still a warm month in Frontenac, Missouri, with an average temperature ranging between min 60.1°F (15.6°C) and max 79.7°F (26.5°C).

Temperature

September ushers in a minor alteration in Frontenac's climate, with the average high-temperature moving from August's 85.5°F (29.7°C) to a still moderately hot 79.7°F (26.5°C). In Frontenac, the average temperature during the nights of September drops to a refreshing 60.1°F (15.6°C).

Humidity

The average relative humidity in September in Frontenac is 73%.

Rainfall

In Frontenac, during September, the rain falls for 12 days and regularly aggregates up to 1.97" (50mm) of precipitation. Throughout the year, there are 144.8 rainfall days, and 30.59" (777mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

In Frontenac, Missouri, the average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 6:31 am and sunset at 7:31 pm. On the last day of September, sunrise is at 6:57 am and sunset at 6:45 pm CDT.

Sunshine

In Frontenac, the average sunshine in September is 9.6h.

UV index

In September, the average daily maximum UV index in Frontenac, Missouri, is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 5 translates into the following recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Opt for tightly woven and loose clothing to enhance protection from the Sun. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
[Resources]

Frequently asked questions

What are September temperatures in Frontenac?

The average high-temperature, in September, in Frontenac, is 79.7°F (26.5°C), while the average low-temperature is 60.1°F (15.6°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 95°F (35°C).

What is the average humidity in September in Frontenac?

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

How much does it rain in Frontenac in September?

In September, the rain falls for 12 days. Throughout September, 1.97" (50mm) of precipitation is accumulated.

When it does not snow in Frontenac?

In Frontenac, Missouri, snow does not fall in April through October.

How many hours of daylight does Frontenac have in September?

The average day length in September is 12h and 25min.

What time are sunrise and sunset in September in Frontenac?

On the first day of September in Frontenac, Missouri, sunrise is at 6:31 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:45 pm CDT.

How many hours of sunshine does Frontenac have in September?

In September, the average sunshine duration is 9.6h.

How high is the UV index in September in Frontenac?

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

Average temperature in September - Frontenac, MO
  • Average high temperature in September: 79.7°F

The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (37.8°F).

  • Average low temperature in September: 60.1°F

The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

[Resources]

Average pressure in September
Frontenac, MO

Average pressure in September - Frontenac, 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).

[Resources]

Average wind speed in September
Frontenac, MO

Average wind speed in September - Frontenac, MO
  • Average wind speed in September: 6mph

The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

[Resources]

Average humidity in September
Frontenac, MO

Average humidity in September - Frontenac, MO
  • Average humidity in September: 73%

The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (70%).

[Resources]

Average rainfall in September
Frontenac, MO

Average rainfall in September - Frontenac, MO
  • Average rainfall in September: 1.97"

The wettest month (with the highest rainfall) is May (3.58").
The driest month (with the least rainfall) is February (1.69").

[Resources]

Average rainfall days in September
Frontenac, MO

Average rainfall days in September - Frontenac, MO
  • Average rainfall days in September: 12 days

The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (6.5 days).

[Resources]

Average snowfall in September
Frontenac, MO

Average snowfall in September - Frontenac, MO
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.6").
The months with the least snowfall are April, May, June, July, August, September and October (0").

[Resources]

Average snowfall days in September
Frontenac, MO

Average snowfall days in September - Frontenac, MO
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is February (5.2 days).
The months with the least snowfall days are May, June, July and August (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Frontenac, MO

Average daylight in September / Average sunshine in September - Frontenac, 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 4min

The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

[Resources]

Average sunshine days in September
Frontenac, MO

Average sunshine days in September - Frontenac, MO
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is January (21 days).
The month with the least sunshine days is June (11.2 days).

[Resources]

Average UV index in September
Frontenac, MO

Average UV index in September - Frontenac, MO
  • 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 and December (UV index 2).

[Resources]

Average cloud cover in September
Frontenac, MO

Average cloud cover in September - Frontenac, MO
  • Average cloud cover in September: 28

The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).

[Resources]

Average visibility in September
Frontenac, MO

Average visibility in September - Frontenac, 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).

[Resources]

Frontenac, Missouri, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location