Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The arrival of September correlates with a minor temperature reduction, down from August's tropical 86.5°F (30.3°C) to a warm 80.1°F (26.7°C). The nighttime temperature dips to a refreshing 59.5°F (15.3°C) on average during September.Humidity
August through October, with an average relative humidity of 74%, are the least humid months.Rainfall
In Graff, in September, it is raining for 13.1 days, with typically 1.93" (49mm) of accumulated precipitation. Throughout the year, in Graff, there are 154.1 rainfall days, and 32.83" (834mm) of precipitation is accumulated.Snowfall
June through October are months without snowfall in Graff.Daylight
In Graff, the average length of the day in September is 12h and 25min.On the first day of September in Graff, sunrise is at 6:40 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:53 pm CDT.
Sunshine
The average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index in Graff is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: An average UV index of 5 in September transforms into this advice:
Undertake precautions - Guarding against sun damage is counselled. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Graff?
What is the least humid month in Graff?
What is the average humidity in September in Graff?
How much does it rain in Graff in September?
When it does not snow in Graff?
How many hours of daylight does Graff have in September?
When is the sunrise / sunset in September in Graff?
How long on average sun shines in September in Graff?
What is the UV index intensity in September in Graff?
Average temperature in September
Graff, MO
- Average high temperature in September: 80.1°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (40.8°F).
- Average low temperature in September: 59.5°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in September
Graff, 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
Graff, MO
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest month (with the lowest average wind speed) is July (5.4mph).
Average humidity in September
Graff, MO
- Average humidity in September: 74%
The months with the highest relative humidity are March and May (79%).
The months with the lowest relative humidity are August, September and October (74%).
Average rainfall in September
Graff, MO
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is May (4.06").
The driest month (with the least rainfall) is February (1.77").
Average rainfall days in September
Graff, MO
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in September
Graff, MO
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.4").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Graff, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Graff, 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 3min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in September
Graff, MO
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is December (19.7 days).
The month with the least sunshine days is August (11.5 days).
Average UV index in September
Graff, 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
Graff, MO
- Average cloud cover in September: 31
The month with the most cloud cover is March (Cloud cover 49).
The months with the least cloud cover are June and August (Cloud cover 30).
Average visibility in September
Graff, MO
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, August, September, October, November and December (6mi).
The months with the lowest visibility are May and July (5mi).
Graff, Missouri, USA
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