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
With the arrival of September, Walnut Grove experiences a modest decline in average high-temperatures, transitioning from a tropical 87.1°F (30.6°C) in August to a warm 80.1°F (26.7°C). September generally records an average low-temperature of 59.9°F (15.5°C).Humidity
The average relative humidity in September is 73%.Rainfall
In September, the rain falls for 14.3 days. Throughout September, 2.44" (62mm) of precipitation is accumulated. In Walnut Grove, during the entire year, the rain falls for 167.3 days and collects up to 37.91" (963mm) of precipitation.Snowfall
June through October are months without snowfall in Walnut Grove.Daylight
In September, the average length of the day is 12h and 25min.On the first day of September, sunrise is at 6:45 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:58 pm CDT.
Sunshine
In Walnut Grove, 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:
Ensure safety - Recommendations to avert sunburn are presented. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How many days does it rain in September in Walnut Grove?
When it does not snow?
How many hours of daylight does Walnut Grove have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Walnut Grove have in September?
How high is the UV index in September?
Average temperature in September
Walnut Grove, MO
- Average high temperature in September: 80.1°F
The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (41.5°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in September
Walnut Grove, MO
- Average pressure in September: 30.03"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
Walnut Grove, MO
- Average wind speed in September: 6.8mph
The windiest months (with the highest average wind speed) are January and March (9.8mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).
Average humidity in September
Walnut Grove, MO
- Average humidity in September: 73%
The months with the highest relative humidity are March and May (77%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Walnut Grove, MO
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is May (5.63").
The driest month (with the least rainfall) is January (1.73").
Average rainfall days in September
Walnut Grove, MO
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is July (19.4 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in September
Walnut Grove, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.11").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Walnut Grove, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Walnut Grove, 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 42min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Walnut Grove, MO
- Average sunshine days in September: 13 days
The month with the most sunshine days is December (18.6 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in September
Walnut Grove, MO
- Average UV index in September: 5
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Walnut Grove, MO
- Average cloud cover in September: 29
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Walnut Grove, 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).
Walnut Grove, Missouri, USA
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