September weather forecast
Grandview, MO

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Weather in September

September in Grandview marks the onset of the autumn season, bringing forward an enchanting mix of climatic elements. The average high temperature drops to 78.4°F (25.8°C), demonstrating the commencement of the cooling trend. The transition from August ushers in cooler days, reduced daylight hours, and a shift in the scenic landscape. The gradual decrease in temperature is palpable, paving the way for an earthy and serene outdoor ambiance. Grandview in September is a spectacle of falling leaves, mild temperatures and a captivating fall spirit.

Temperature

A mild shift in the average high-temperature occurs in September, reducing from 84.9°F (29.4°C) in August to a still moderately hot 78.4°F (25.8°C). During the nights in September, Grandview experiences a consistent average temperature of 59.9°F (15.5°C).

Humidity

The average relative humidity in September is 75%.

Rainfall

In Grandview, in September, it is raining for 12 days, with typically 2.56" (65mm) of accumulated precipitation. In Grandview, during the entire year, the rain falls for 133.9 days and collects up to 28.54" (725mm) of precipitation.

Snowfall

June through September are months without snowfall in Grandview.

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of the month, sunrise is at 6:47 am and sunset at 7:48 pm. On the last day of September, in Grandview, sunrise is at 7:13 am and sunset at 7:01 pm CDT.

Sunshine

The average sunshine in September is 9.3h.

UV index

In Grandview, Missouri, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 5 during September leads to these instructions:
Heed the precautions - It is counselled to guard against solar damage. To protect against the Sun's most potent rays, avoid direct exposure around midday. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
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Frequently asked questions

What is the average September temperature in Grandview?

September temperatures vary between a high-temperature of 78.4°F (25.8°C) and a low-temperature of 59.9°F (15.5°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in August is calculated to be 95°F (35°C).

What is the average humidity in September in Grandview?

In September, the average relative humidity in Grandview, Missouri, is 75%.

How much does it rain in Grandview in September?

In September, the rain falls for 12 days. Throughout September, 2.56" (65mm) of precipitation is accumulated.

When it does not snow in Grandview?

June through September are months without snowfall.

Does it snow in Grandview in September?

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

What is the average length of the day in September in Grandview?

In Grandview, Missouri, the average day length in September is 12h and 26min.

What time are sunrise and sunset in September in Grandview?

On the first day of September in Grandview, sunrise is at 6:47 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:01 pm CDT.

How long on average sun shines in September in Grandview?

In September, the average sunshine duration in Grandview is 9.3h.

How high is the UV index in September in Grandview?

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

Average temperature in September - Grandview, MO
  • Average high temperature in September: 78.4°F

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (37.4°F).

  • Average low temperature in September: 59.9°F

The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).

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Average pressure in September
Grandview, MO

Average pressure in September - Grandview, MO
  • Average pressure in September: 30.01"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in September
Grandview, MO

Average wind speed in September - Grandview, MO
  • Average wind speed in September: 7.1mph

The windiest month (with the highest average wind speed) is March (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).

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Average humidity in September
Grandview, MO

Average humidity in September - Grandview, MO
  • Average humidity in September: 75%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in September
Grandview, MO

Average rainfall in September - Grandview, MO
  • Average rainfall in September: 2.56"

The wettest month (with the highest rainfall) is May (4.41").
The driest month (with the least rainfall) is January (0.94").

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Average rainfall days in September
Grandview, MO

Average rainfall days in September - Grandview, MO
  • Average rainfall days in September: 12 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (5.3 days).

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Average snowfall in September
Grandview, MO

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

The month with the highest snowfall is February (3.31").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Grandview, MO

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

The month with the highest number of snowfall days is February (5.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Grandview, 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 July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).

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Average sunshine days in September
Grandview, MO

Average sunshine days in September - Grandview, MO
  • Average sunshine days in September: 15.5 days

The month with the most sunshine days is December (22.6 days).
The month with the least sunshine days is May (11.3 days).

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Average UV index in September
Grandview, MO

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

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Average cloud cover in September
Grandview, MO

Average cloud cover in September - Grandview, MO
  • Average cloud cover in September: 29

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 26).

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Average visibility in September
Grandview, MO

Average visibility in September - Grandview, 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).

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Grandview, Missouri, USA

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