September weather forecast
Rombauer, MO

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Weather in September

September, the first month of the autumn in Rombauer, is still a warm month, with an average temperature fluctuating between 81.7°F (27.6°C) and 62.2°F (16.8°C).

Temperature

Rombauer's average high-temperature in September sits at a moderately hot 81.7°F (27.6°C), showing little difference from the previous month. Rombauer experiences an average temperature drop to a comfortable 62.2°F (16.8°C) during September nights.

Heat index

During September, the heat index is computed to be a hot 86°F (30°C). Continued exposure and engagement in activity might trigger tiredness and subsequently heat cramps.
Heat index's context suggests values are appropriate for shady areas and slight breezes. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In Rombauer, the average relative humidity in September is 72%.

Rainfall

In Rombauer, during September, the rain falls for 9.3 days and regularly aggregates up to 0.87" (22mm) of precipitation. Throughout the year, there are 124.5 rainfall days, and 16.38" (416mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

In September, the average length of the day is 12h and 24min.
On the first day of the month, sunrise is at 6:32 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:56 am and sunset at 6:45 pm CDT.

Sunshine

In Rombauer, the average sunshine in September is 9.9h.

UV index

In Rombauer, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 5 translates into the following recommendations:
Take precautions - Protection against sun damage is advised. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Updated: Jul 11, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature?

Rombauer in September has an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 62.2°F (16.8°C). In September, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is computed to be 86°F (30°C).

What is the average humidity in September?

In September, the average relative humidity is 72%.

How much does it rain in September?

In Rombauer, in September, during 9.3 rainfall days, 0.87" (22mm) of precipitation is typically accumulated.

When it does not snow?

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

How many hours of daylight does Rombauer have in September?

The average day length in September is 12h and 24min.

When are sunrise and sunset in September?

On the first day of September, sunrise is at 6:32 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:45 pm CDT.

How many hours of sunshine does Rombauer have in September?

In Rombauer, Missouri, the average sunshine duration in September is 9.9h.

How high is the UV index in September?

In Rombauer, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health risk 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
Rombauer, MO

Average temperature in September - Rombauer, MO
  • Average high temperature in September: 81.7°F

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (42.8°F).

  • Average low temperature in September: 62.2°F

The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).

Average pressure in September
Rombauer, MO

Average pressure in September - Rombauer, MO
  • Average pressure in September: 30.01"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
Rombauer, MO

Average wind speed in September - Rombauer, MO
  • Average wind speed in September: 6mph

The windiest month (with the highest average wind speed) is February (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

Average humidity in September
Rombauer, MO

Average humidity in September - Rombauer, MO
  • Average humidity in September: 72%

The months with the highest relative humidity are March and May (78%).
The month with the lowest relative humidity is October (69%).

Average rainfall in September
Rombauer, MO

Average rainfall in September - Rombauer, MO
  • Average rainfall in September: 0.87"

The wettest month (with the highest rainfall) is May (2.17").
The driest month (with the least rainfall) is December (0.75").

Average rainfall days in September
Rombauer, MO

Average rainfall days in September - Rombauer, MO
  • Average rainfall days in September: 9.3 days

The months with the highest number of rainy days are May and July (14.3 days).
The month with the least rainy days is January (6 days).

Average snowfall in September
Rombauer, MO

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

The month with the highest snowfall is February (0.39").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Rombauer, MO

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

The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in September: 9h and 5min

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

Average sunshine days in September
Rombauer, MO

Average sunshine days in September - Rombauer, MO
  • Average sunshine days in September: 17.8 days

The month with the most sunshine days is January (22.5 days).
The month with the least sunshine days is July (13.8 days).

Average UV index in September
Rombauer, MO

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

Average cloud cover in September
Rombauer, MO

Average cloud cover in September - Rombauer, MO
  • Average cloud cover in September: 26

The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 24).

Average visibility in September
Rombauer, MO

Average visibility in September - Rombauer, 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).

Rombauer, Missouri, USA

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