September weather forecast
Festus, MO

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Weather in September

September, the first month of the autumn in Festus, is still a warm month, with an average temperature varying between 79.7°F (26.5°C) and 59.9°F (15.5°C).

Temperature

A subtle change in temperatures is noted as August gives way to September, with average highs reducing from a hot 86.2°F (30.1°C) to a moderately hot 79.7°F (26.5°C). In the month of September, the nighttime temperature dips to a steady average of 59.9°F (15.5°C).

Humidity

The average relative humidity in September is 74%.

Rainfall

In Festus, in September, it is raining for 13 days, with typically 2.13" (54mm) of accumulated precipitation. In Festus, during the entire year, the rain falls for 155 days and collects up to 34.92" (887mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In Festus, Missouri, the average length of the day in September is 12h and 25min.
On the first day of September, sunrise is at 6:31 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:45 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 moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The average daily UV index of 5 in September transforms into the following instructions:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Boost your sun resistance with garments that are densely woven yet spacious.
Updated: Jul 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

During September, Festus experiences an average high-temperature of 79.7°F (26.5°C) and a low-temperature of 59.9°F (15.5°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is calculated to be 98.6°F (37°C).

What is the average humidity in September?

In Festus, the average relative humidity in September is 74%.

How many days does it rain in September in Festus?

In Festus, in September, it is raining for 13 days, with typically 2.13" (54mm) of accumulated precipitation.

When it does not snow?

In Festus, snow does not fall in April through October.

How many hours of daylight does Festus have in September?

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

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:31 am and sunset at 7:30 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 Festus have in September?

In Festus, the average sunshine duration in September is 9.5h.

How high is the UV index in September?

In Festus, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability 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
Festus, MO

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

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (39°F).

  • Average low temperature in September: 59.9°F

The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).

Average pressure in September
Festus, MO

Average pressure in September - Festus, 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).

Average wind speed in September
Festus, MO

Average wind speed in September - Festus, MO
  • Average wind speed in September: 5.6mph

The windiest month (with the highest average wind speed) is January (9mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in September
Festus, MO

Average humidity in September - Festus, MO
  • Average humidity in September: 74%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (72%).

Average rainfall in September
Festus, MO

Average rainfall in September - Festus, MO
  • Average rainfall in September: 2.13"

The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is February (1.97").

Average rainfall days in September
Festus, MO

Average rainfall days in September - Festus, MO
  • Average rainfall days in September: 13 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (8.2 days).

Average snowfall in September
Festus, MO

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

The month with the highest snowfall is January (2.36").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Festus, MO

Average snowfall days in September - Festus, MO
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Festus, 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 36min).

  • Average sunshine in September: 9h and 3min

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 48min).

Average sunshine days in September
Festus, MO

Average sunshine days in September - Festus, MO
  • Average sunshine days in September: 14.6 days

The month with the most sunshine days is December (19.2 days).
The month with the least sunshine days is July (10.7 days).

Average UV index in September
Festus, MO

Average UV index in September - Festus, 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, November and December (UV index 2).

Average cloud cover in September
Festus, MO

Average cloud cover in September - Festus, MO
  • Average cloud cover in September: 29

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

Average visibility in September
Festus, MO

Average visibility in September - Festus, 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).

Festus, Missouri, USA

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