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
The beginning of September brings a minor change in the average high-temperature, shifting from a hot 89.8°F (32.1°C) in August to a warm 82.4°F (28°C). Nightfall in September introduces a considerable dip in temperature, settling at an average of 60.3°F (15.7°C).Heat index
The heat index for September is estimated at a tropical 87.8°F (31°C). Uninterrupted exposure and activity might result in fatigue, potentially causing heat cramps.It is crucial to understand that heat index figures are for shade and gentle wind conditions. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely 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 September, the average relative humidity is 74%.Rainfall
The month with the least rainfall is September, when the rain falls for 10.8 days and typically collects 1.73" (44mm) of precipitation.Snowfall
In Isabella, snow does not fall in April 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 6:42 am and sunset at 7:38 pm. On the last day of September, sunrise is at 7:05 am and sunset at 6:54 pm CDT.
Sunshine
In Isabella, the average sunshine in September is 9.2h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 5 during September translates into the following guidance:
Exercise prevention - Precautions against solar damage are endorsed. It's recommended to limit sun exposure when its radiation is at its peak during midday. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Isabella have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Isabella, MO
- Average high temperature in September: 82.4°F
The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is January (44.2°F).
- Average low temperature in September: 60.3°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (28.2°F).
Average pressure in September
Isabella, 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
Isabella, MO
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are January, February, March and April (7mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in September
Isabella, MO
- Average humidity in September: 74%
The month with the highest relative humidity is March (79%).
The months with the lowest relative humidity are July, August and October (73%).
Average rainfall in September
Isabella, MO
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is May (4.33").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in September
Isabella, MO
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (7.6 days).
Average snowfall in September
Isabella, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.77").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Isabella, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.4 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
Isabella, 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 1min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are January and February (Average sunshine: 5h and 6min).
Average sunshine days in September
Isabella, MO
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is May (12.7 days).
Average UV index in September
Isabella, 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
Isabella, MO
- Average cloud cover in September: 32
The month with the most cloud cover is March (Cloud cover 49).
The months with the least cloud cover are June and July (Cloud cover 30).
Average visibility in September
Isabella, MO
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, October, November and December (6mi).
The months with the lowest visibility are April, May, June, July, August and September (5mi).
Isabella, Missouri, USA
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