September weather forecast
Troy, MO

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Weather in September

September, the first month of the autumn in Troy, is also a moderately hot month, with an average temperature fluctuating between 59°F (15°C) and 79.2°F (26.2°C).

Temperature

Troy records a mild change in average high-temperature during September, easing from 85.3°F (29.6°C) in August to a still moderately hot 79.2°F (26.2°C). Troy records a consistent low-temperature of 59°F (15°C) during September nights.

Humidity

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

Rainfall

In September, the rain falls for 11.4 days. Throughout September, 2.17" (55mm) of precipitation is accumulated. In Troy, during the entire year, the rain falls for 142.7 days and collects up to 29.25" (743mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:33 am and sunset at 7:33 pm. On the last day of September, sunrise is at 6:59 am and sunset at 6:47 pm CDT.

Sunshine

In September, the average sunshine is 9.3h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum UV index of 5 in September translates into the following recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Updated: Jul 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

The high-temperature, in September, in Troy, is 79.2°F (26.2°C), while the low-temperature averages to 59°F (15°C). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is evaluated at 95°F (35°C).

What is the average humidity in September?

The average relative humidity in September is 74%.

How many days does it rain in September?

In Troy, in September, during 11.4 rainfall days, 2.17" (55mm) of precipitation is typically accumulated.

When it does not snow?

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

What is the average length of the day in September?

The average day length in September in Troy is 12h and 26min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:33 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:47 pm CDT.

How long on average sun shines in September?

The average sunshine duration in September is 9.3h.

How high is the UV index in September?

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat 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
Troy, MO

Average temperature in September - Troy, MO
  • Average high temperature in September: 79.2°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (36.3°F).

  • Average low temperature in September: 59°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).

Average pressure in September
Troy, MO

Average pressure in September - Troy, 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 (29.91"Hg).

Average wind speed in September
Troy, MO

Average wind speed in September - Troy, MO
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

Average humidity in September
Troy, MO

Average humidity in September - Troy, 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
Troy, MO

Average rainfall in September - Troy, MO
  • Average rainfall in September: 2.17"

The wettest month (with the highest rainfall) is May (3.46").
The driest month (with the least rainfall) is January (1.38").

Average rainfall days in September
Troy, MO

Average rainfall days in September - Troy, MO
  • Average rainfall days in September: 11.4 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (6.3 days).

Average snowfall in September
Troy, MO

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

The months with the highest snowfall are January and February (2.68").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Troy, MO

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

The month with the highest number of snowfall days is January (6.2 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
Troy, MO

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

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 9h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

Average sunshine days in September
Troy, MO

Average sunshine days in September - Troy, MO
  • Average sunshine days in September: 17.1 days

The month with the most sunshine days is December (19.6 days).
The month with the least sunshine days is May (11.9 days).

Average UV index in September
Troy, MO

Average UV index in September - Troy, MO
  • Average UV index in September: 5

The months with the highest UV index are 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
Troy, MO

Average cloud cover in September - Troy, MO
  • Average cloud cover in September: 31

The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June and August (Cloud cover 30).

Average visibility in September
Troy, MO

Average visibility in September - Troy, MO
  • Average visibility in September: 6mi

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

Troy, Missouri, USA

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