September weather forecast
Longtown, MO

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Longtown, Missouri, with an average temperature varying between 59.9°F (15.5°C) and 80.1°F (26.7°C).

Temperature

The commencement of September includes a gentle temperature shift, with the average high-temperature dropping a bit from a tropical 86.2°F (30.1°C) in August to a warm 80.1°F (26.7°C). Longtown records an average low-temperature of 59.9°F (15.5°C) throughout the month of September.

Humidity

The average relative humidity in September is 74%.

Rainfall

The month with the least rainfall is September, when the rain falls for 8.6 days and typically collects 0.43" (11mm) of precipitation.

Snowfall

April through September are months without snowfall.

Daylight

In September, the average length of the day is 12h and 25min.
On the first day of the month, sunrise is at 6:29 am and sunset at 7:27 pm. On the last day of September, sunrise is at 6:54 am and sunset at 6:43 pm CDT.

Sunshine

In Longtown, the average sunshine in September is 9.4h.

UV index

In September, the average daily maximum UV index 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 ordinary individuals.
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. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Updated: Jul 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

In September, the average high-temperature and low-temperature are 80.1°F (26.7°C) and 59.9°F (15.5°C) respectively. The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in August is evaluated at 98.6°F (37°C).

What is the average humidity in September?

The average relative humidity in September is 74%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 8.6 days and typically collects 0.43" (11mm) of precipitation.

How many days does it rain in September?

In Longtown, in September, it is raining for 8.6 days, with typically 0.43" (11mm) of accumulated precipitation.

When it does not snow?

In Longtown, Missouri, snow does not fall in April through September.

Does it snow in September?

In Longtown, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Longtown have in September?

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

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 6:29 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:43 pm CDT.

How many hours of sunshine does Longtown have in September?

In September, the average sunshine duration is 9.4h.

What is the UV index reading in September?

In Longtown, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
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
Longtown, MO

Average temperature in September - Longtown, MO
  • Average high temperature in September: 80.1°F

The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (39.4°F).

  • Average low temperature in September: 59.9°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

Average pressure in September
Longtown, MO

Average pressure in September - Longtown, 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
Longtown, MO

Average wind speed in September - Longtown, MO
  • Average wind speed in September: 5.9mph

The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

Average humidity in September
Longtown, MO

Average humidity in September - Longtown, 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 (71%).

Average rainfall in September
Longtown, MO

Average rainfall in September - Longtown, MO
  • Average rainfall in September: 0.43"

The wettest months (with the highest rainfall) are April and May (1.22").
The driest month (with the least rainfall) is September (0.43").

Average rainfall days in September
Longtown, MO

Average rainfall days in September - Longtown, MO
  • Average rainfall days in September: 8.6 days

The month with the highest number of rainy days is July (13.4 days).
The month with the least rainy days is January (5.9 days).

Average snowfall in September
Longtown, MO

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

The month with the highest snowfall is February (0.59").
The months with the least snowfall are April, May, June, July, August and September (0").

Average snowfall days in September
Longtown, MO

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

The month with the highest number of snowfall days is January (3.7 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
Longtown, MO

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

  • Average sunshine in September: 9h and 2min

The months with the most sunshine are June and July (Average sunshine: 10h and 36min).
The months with the least sunshine are January and February (Average sunshine: 4h and 48min).

Average sunshine days in September
Longtown, MO

Average sunshine days in September - Longtown, MO
  • Average sunshine days in September: 18.7 days

The month with the most sunshine days is October (21.9 days).
The month with the least sunshine days is July (13.5 days).

Average UV index in September
Longtown, MO

Average UV index in September - Longtown, 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
Longtown, MO

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

The months with the most cloud cover are January and February (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 27).

Average visibility in September
Longtown, MO

Average visibility in September - Longtown, 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).

Longtown, Missouri, USA

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