September weather forecastDexter, MO
September
Weather in September
September brings a welcoming relief for those exhausted by the previous months' heat. Dexter experiences a swifter cooling trend, with highs dropping down to average highs of 81.7°F (27.6°C). This replacement of the stifling summer heat with milder temperatures signifies the onset of autumn. The eased temperatures and decreasing humidity levels deem September a pleasant month. As the leaves begin to change color, Dexter prepares for another annual season shift.Temperature
September's presence in Dexter marks an average high-temperature of a warm 81.7°F (27.6°C), subtly varied from August's 86.4°F (30.2°C). During September, the nighttime temperature averages of 62.4°F (16.9°C).Heat index
During September, the heat index is appraised at a tropical 86°F (30°C). Persistently participating in activities during exposure may lead to fatigue and induce heat cramps.It is essential to grasp that the heat index's numbers are for shade and light wind settings. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful 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 September, the average relative humidity in Dexter is 72%.Rainfall
September is the month with the least rainfall. Rain falls for 8.6 days and accumulates 0.47" (12mm) of precipitation.Snowfall
In Dexter, snow does not fall in April through October.Daylight
In September, the average length of the day in Dexter, Missouri, is 12h and 24min.On the first day of the month, sunrise is at 6:31 am and sunset at 7:27 pm. On the last day of September, sunrise is at 6:54 am and sunset at 6:44 pm CDT.
Sunshine
In September, the average sunshine is 9.8h.UV index
In September, the average daily maximum UV index in Dexter, Missouri, is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Dexter, MO
- Average high temperature in September: 81.7°F
The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (42.4°F).
- Average low temperature in September: 62.4°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).
Average pressure in September
Dexter, 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
Dexter, MO
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is February (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Dexter, MO
- Average humidity in September: 72%
The month with the highest relative humidity is March (78%).
The month with the lowest relative humidity is October (68%).
Average rainfall in September
Dexter, MO
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is May (1.42").
The driest month (with the least rainfall) is September (0.47").
Average rainfall days in September
Dexter, MO
- Average rainfall days in September: 8.6 days
The month with the highest number of rainy days is July (12.5 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in September
Dexter, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.24").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Dexter, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Dexter, MO
- Average daylight in September: 12h and 24min
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 48min
The months with the most sunshine are June and July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Dexter, MO
- Average sunshine days in September: 19.2 days
The month with the most sunshine days is December (23.4 days).
The month with the least sunshine days is May (15.7 days).
Average UV index in September
Dexter, 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 and December (UV index 2).
Average cloud cover in September
Dexter, MO
- Average cloud cover in September: 27
The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 25).
Average visibility in September
Dexter, 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).
