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 commencement of September, Clark records a moderate temperature decline, with the average high easing from August's 83.8°F (28.8°C) to a still moderately hot 78.3°F (25.7°C). In September, Clark encounters an average low-temperature of 59°F (15°C) during the night.Humidity
The average relative humidity in September is 74%.Rainfall
In Clark, in September, it is raining for 11.5 days, with typically 2.17" (55mm) of accumulated precipitation. Throughout the year, in Clark, there are 136.6 rainfall days, and 27.44" (697mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, September through December. September is the first month it typically snows in Clark, Missouri. Throughout September, in the average 0.1 snowfall days, it receives 0.08" (2mm) of snow. In Clark, during the entire year, snow falls for 21.5 days and aggregates up to 10.94" (278mm) of snow.Daylight
In Clark, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:38 am and sunset at 7:39 pm. On the last day of September, in Clark, sunrise is at 7:05 am and sunset at 6:53 pm CDT.
Sunshine
The average sunshine in September in Clark is 9.4h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Take necessary precautions - Suggestions to elude sunburn are provided. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Frequently asked questions
What are September temperatures in Clark?
What is the average humidity in September in Clark?
How much does it rain in Clark in September?
When does it start snowing in Clark?
How many hours of daylight does Clark have in September?
When are sunrise and sunset in September in Clark?
How long on average sun shines in September in Clark?
What is the UV index reading in September in Clark?
Average temperature in September
Clark, MO
- Average high temperature in September: 78.3°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in September: 59°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 (21.7°F).
Average pressure in September
Clark, 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 (29.91"Hg).
Average wind speed in September
Clark, MO
- Average wind speed in September: 7.1mph
The windiest months (with the highest average wind speed) are January, February and March (10mph).
The calmest months (with the lowest average wind speed) are July and August (6.4mph).
Average humidity in September
Clark, MO
- Average humidity in September: 74%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Clark, MO
- Average rainfall in September: 2.17"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in September
Clark, MO
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (5.2 days).
Average snowfall in September
Clark, MO
- Average snowfall in September: 0.08"
The month with the highest snowfall is January (3.7").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in September
Clark, MO
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (6.9 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Clark, 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: 4h and 36min).
Average sunshine days in September
Clark, MO
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is May (11.7 days).
Average UV index in September
Clark, MO
- Average UV index in September: 5
The months with the highest UV index are 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
Clark, MO
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in September
Clark, 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).
Clark, Missouri, USA
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