September weather forecastHarrisonville, MO
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Harrisonville, Missouri, with temperature in the range of an average low of 59.5°F (15.3°C) and an average high of 78.3°F (25.7°C).Temperature
With the onset of September, Harrisonville experiences a modest temperature adjustment, with the average high-temperature gently receding from a moderately hot 84.7°F (29.3°C) in August to a still warm 78.3°F (25.7°C). An average nighttime temperature of 59.5°F (15.3°C) is noted in Harrisonville during the month of September.Humidity
The average relative humidity in September is 76%.Rainfall
In Harrisonville, in September, it is raining for 11.5 days, with typically 2.01" (51mm) of accumulated precipitation. In Harrisonville, during the entire year, the rain falls for 129.2 days and collects up to 22.2" (564mm) of precipitation.Snowfall
In Harrisonville, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 6:47 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:01 pm CDT.
Sunshine
In September, the average sunshine is 9.4h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 5 during September translates into the following guidance:
Prioritize safety - Suggestions to prevent sun damage are offered. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Harrisonville, MO
- Average high temperature in September: 78.3°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in September: 59.5°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 (23.5°F).
Average pressure in September
Harrisonville, 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 (29.9"Hg).
Average wind speed in September
Harrisonville, MO
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is March (10.2mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in September
Harrisonville, MO
- Average humidity in September: 76%
The months with the highest relative humidity are May and June (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Harrisonville, MO
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in September
Harrisonville, MO
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (5.2 days).
Average snowfall in September
Harrisonville, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Harrisonville, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Harrisonville, MO
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Harrisonville, MO
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is December (22.9 days).
The month with the least sunshine days is May (13 days).
Average UV index in September
Harrisonville, 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).
Average cloud cover in September
Harrisonville, MO
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in September
Harrisonville, 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).
