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
A modest decline in the average high-temperature is seen during September, decreasing from a hot 87.8°F (31°C) in August to a warm 81°F (27.2°C). Shell Knob records an average nighttime low-temperature of 60.3°F (15.7°C) throughout September.Heat index
The heat index for September is computed to be 84.2°F (29°C). If one endures exposure and continues to be active, it might result in tiredness and heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', represents the fusion of temperature and moisture in the air to suggest how warm it feels. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Humidity
In Shell Knob, the average relative humidity in September is 73%.Rainfall
In September, the rain falls for 13.2 days. Throughout September, 2.24" (57mm) of precipitation is accumulated. In Shell Knob, Missouri, during the entire year, the rain falls for 149.2 days and collects up to 33.43" (849mm) of precipitation.Snowfall
In Shell Knob, snow does not fall in June through October.Daylight
The average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 6:46 am and sunset at 7:42 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:58 pm CDT.
Sunshine
The average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 5 translates into these guidelines:
Take necessary precautions - Suggestions to elude sunburn are provided. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Shell Knob in September?
What is the average humidity in September?
How much does it rain in Shell Knob in September?
When it does not snow?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Shell Knob have in September?
How high is the UV index in September?
Average temperature in September
Shell Knob, MO
- Average high temperature in September: 81°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (43.5°F).
- Average low temperature in September: 60.3°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (27.9°F).
Average pressure in September
Shell Knob, MO
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Shell Knob, MO
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in September
Shell Knob, MO
- Average humidity in September: 73%
The month with the highest relative humidity is May (77%).
The months with the lowest relative humidity are July, August and October (72%).
Average rainfall in September
Shell Knob, MO
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is May (4.69").
The driest month (with the least rainfall) is February (1.69").
Average rainfall days in September
Shell Knob, MO
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is December (7.2 days).
Average snowfall in September
Shell Knob, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.64").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Shell Knob, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Shell Knob, 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 3min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in September
Shell Knob, MO
- Average sunshine days in September: 15 days
The month with the most sunshine days is December (21.3 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in September
Shell Knob, 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
Shell Knob, MO
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 46).
The months with the least cloud cover are June, July and August (Cloud cover 26).
Average visibility in September
Shell Knob, 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).
Shell Knob, Missouri, USA
Weather forecast for your location
2. Allow the app to use your location