September weather forecast
Mill Spring, MO

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Weather in September

September, the first month of the autumn in Mill Spring, is still a warm month, with an average temperature ranging between max 81.3°F (27.4°C) and min 60.1°F (15.6°C).

Temperature

The beginning of September brings a minor change in the average high-temperature, shifting from a tropical 87.8°F (31°C) in August to a warm 81.3°F (27.4°C). Throughout the month of September, Mill Spring sees a steady low-temperature average of 60.1°F (15.6°C).

Heat index

For September, the heat index is computed to be a hot 86°F (30°C). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.
Heat index data is primarily for areas with shade and subjected to light winds. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.

Humidity

The average relative humidity in September is 74%.

Rainfall

September and December are months with the least rain in Mill Spring when the rain falls for 10.2 days and typically aggregates up to 1.26" (32mm) of rain.

Snowfall

In Mill Spring, snow does not fall in April through October.

Daylight

The average length of the day in September is 12h and 25min.
On the first day of September, sunrise is at 6:34 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:47 pm CDT.

Sunshine

The average sunshine in September is 9.6h.

UV index

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Act with care - Obligation to protect against skin and eye damage is highlighted. To protect against the Sun's most potent rays, avoid direct exposure around midday. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Updated: Jul 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Mill Spring in September?

The average high-temperature, in September, in Mill Spring, is 81.3°F (27.4°C), while the average low-temperature is 60.1°F (15.6°C). In September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, is computed to be 86°F (30°C).

What is the average humidity in September?

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

What is the driest month?

The months with the least rainfall are September and December Rain falls for 10.2 days and accumulates 1.26" (32mm) of rain.

How much does it rain in September?

In Mill Spring, in September, it is raining for 10.2 days, with typically 1.26" (32mm) of accumulated precipitation.

When it does not snow?

In Mill Spring, snow does not fall in April through October.

What is the average length of the day in September?

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

When are sunrise and sunset in September?

On the first day of September, sunrise is at 6:34 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:47 pm CDT.

How many hours of sunshine does Mill Spring have in September?

In September, the average sunshine duration is 9.6h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health 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
Mill Spring, MO

Average temperature in September - Mill Spring, MO
  • Average high temperature in September: 81.3°F

The warmest month (with the highest average high temperature) is July (89.4°F).
The month with the lowest average high temperature is January (41.5°F).

  • Average low temperature in September: 60.1°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (27.1°F).

Average pressure in September
Mill Spring, MO

Average pressure in September - Mill Spring, 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 (29.93"Hg).

Average wind speed in September
Mill Spring, MO

Average wind speed in September - Mill Spring, MO
  • Average wind speed in September: 5.2mph

The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in September
Mill Spring, MO

Average humidity in September - Mill Spring, MO
  • Average humidity in September: 74%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (72%).

Average rainfall in September
Mill Spring, MO

Average rainfall in September - Mill Spring, MO
  • Average rainfall in September: 1.26"

The wettest month (with the highest rainfall) is April (3.03").
The driest months (with the least rainfall) are September and December (1.26").

Average rainfall days in September
Mill Spring, MO

Average rainfall days in September - Mill Spring, MO
  • Average rainfall days in September: 10.2 days

The month with the highest number of rainy days is July (15.7 days).
The months with the least rainy days are January and December (8.1 days).

Average snowfall in September
Mill Spring, MO

Average snowfall in September - Mill Spring, MO
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.65").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Mill Spring, MO

Average snowfall days in September - Mill Spring, MO
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (3.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Mill Spring, MO

Average daylight in September / Average sunshine in September - Mill Spring, MO
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in September: 9h and 4min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

Average sunshine days in September
Mill Spring, MO

Average sunshine days in September - Mill Spring, MO
  • Average sunshine days in September: 17.6 days

The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is July (12 days).

Average UV index in September
Mill Spring, MO

Average UV index in September - Mill Spring, 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).

Average cloud cover in September
Mill Spring, MO

Average cloud cover in September - Mill Spring, MO
  • Average cloud cover in September: 30

The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 28).

Average visibility in September
Mill Spring, MO

Average visibility in September - Mill Spring, MO
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, June, September, October, November and December (6mi).
The months with the lowest visibility are May, July and August (5mi).

Mill Spring, Missouri, USA

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