September weather forecast
High Ridge, MO

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Weather in September

September, the first month of the autumn in High Ridge, is still a warm month, with an average temperature fluctuating between 80.1°F (26.7°C) and 60.1°F (15.6°C).

Temperature

The start of September comes with a small reduction in the average high-temperature, subtly receding from a hot 86.5°F (30.3°C) in August to a moderately hot 80.1°F (26.7°C). High Ridge, during the nights of September, experiences an average temperature drop to a moderate 60.1°F (15.6°C).

Humidity

The average relative humidity in September is 72%.

Rainfall

In September, the rain falls for 11.9 days. Throughout September, 2.17" (55mm) of precipitation is accumulated. In High Ridge, during the entire year, the rain falls for 141.7 days and collects up to 32.01" (813mm) of precipitation.

Snowfall

Months with snowfall are January through March, September, November and December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 18.9 snowfall days, and 7.2" (183mm) of snow is accumulated.

Daylight

In September, the average length of the day is 12h and 25min.
On the first day of September, sunrise is at 6:32 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:46 pm CDT.

Sunshine

The average sunshine in September is 9.4h.

UV index

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum high UV index of 5 in September translates into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Updated: Jul 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for High Ridge in September?

The high-temperature during September is 80.1°F (26.7°C) and the low-temperature is 60.1°F (15.6°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is estimated at 98.6°F (37°C).

What is the average humidity in September?

In September, the average relative humidity is 72%.

How much does it rain in High Ridge in September?

In High Ridge, in September, during 11.9 rainfall days, 2.17" (55mm) of precipitation is typically accumulated.

When does it start snowing?

September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow.

What is the average length of the day in September?

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

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:32 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:46 pm CDT.

How many hours of sunshine does High Ridge have in September?

In September, the average sunshine duration is 9.4h.

What is the UV index reading in September?

In High Ridge, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from unsafe 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
High Ridge, MO

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

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (38.1°F).

  • Average low temperature in September: 60.1°F

The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).

Average pressure in September
High Ridge, MO

Average pressure in September - High Ridge, 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
High Ridge, MO

Average wind speed in September - High Ridge, MO
  • Average wind speed in September: 5.7mph

The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity in September
High Ridge, MO

Average humidity in September - High Ridge, MO
  • Average humidity in September: 72%

The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).

Average rainfall in September
High Ridge, MO

Average rainfall in September - High Ridge, MO
  • Average rainfall in September: 2.17"

The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is February (1.54").

Average rainfall days in September
High Ridge, MO

Average rainfall days in September - High Ridge, MO
  • Average rainfall days in September: 11.9 days

The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (6.3 days).

Average snowfall in September
High Ridge, MO

Average snowfall in September - High Ridge, MO
  • Average snowfall in September: 0.04"

The month with the highest snowfall is January (2.52").
The months with the least snowfall are April, May, June, July, August and October (0").

Average snowfall days in September
High Ridge, MO

Average snowfall days in September - High Ridge, MO
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is January (6.7 days).
The months with the least snowfall days are April, May, June, July and August (0 days).

Average daylight in September /
Average sunshine in September
High Ridge, MO

Average daylight in September / Average sunshine in September - High Ridge, 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 2min

The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

Average sunshine days in September
High Ridge, MO

Average sunshine days in September - High Ridge, MO
  • Average sunshine days in September: 16.3 days

The month with the most sunshine days is December (20.1 days).
The months with the least sunshine days are May and July (12.6 days).

Average UV index in September
High Ridge, MO

Average UV index in September - High Ridge, MO
  • Average UV index in September: 5

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in September
High Ridge, MO

Average cloud cover in September - High Ridge, MO
  • Average cloud cover in September: 30

The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June, July and August (Cloud cover 29).

Average visibility in September
High Ridge, MO

Average visibility in September - High Ridge, 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).

High Ridge, Missouri, USA

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