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
September signals a slight drop in average high-temperature, sliding from August's hot 91.2°F (32.9°C) to a warm 84.9°F (29.4°C). In September, Mountain Valley endures a notable temperature shift from day to night, with lows averaging at a comfortable 63.3°F (17.4°C).Heat index
September's mean heat index is appraised at a tropical 93.2°F (34°C). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.Take into consideration that the heat index values are calculated for shade and light wind conditions. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', quantifies the warmth felt when relative humidity is considered. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Humidity
The average relative humidity in September in Mountain Valley is 73%.Rainfall
September is the month with the least rainfall in Mountain Valley. Rain falls for 13.2 days and accumulates 2.17" (55mm) of precipitation.Snowfall
In Mountain Valley, snow does not fall in April through October.Daylight
The average length of the day in September in Mountain Valley is 12h and 23min.On the first day of September, sunrise is at 6:45 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:57 pm CDT.
Sunshine
In Mountain Valley, the average sunshine in September is 9.4h.UV index
The average daily maximum UV index in September in Mountain Valley is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Undertake protective steps - Preventing sun damage is advised. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Frequently asked questions
How hot does it get in Mountain Valley in September?
What is the average humidity in September in Mountain Valley?
What is the driest month in Mountain Valley?
How many days does it rain in September in Mountain Valley?
When it does not snow in Mountain Valley?
What is the average length of the day in September in Mountain Valley?
What time are sunrise and sunset in September in Mountain Valley?
How many hours of sunshine does Mountain Valley have in September?
What is the UV index intensity in September in Mountain Valley?
Average temperature in September
Mountain Valley, AR
- Average high temperature in September: 84.9°F
The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is January (48.7°F).
- Average low temperature in September: 63.3°F
The month with the highest average low temperature is July (70.5°F).
The coldest month (with the lowest average low temperature) is January (33.1°F).
Average pressure in September
Mountain Valley, AR
- 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 (29.94"Hg).
Average wind speed in September
Mountain Valley, AR
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in September
Mountain Valley, AR
- Average humidity in September: 73%
The month with the highest relative humidity is March (80%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Mountain Valley, AR
- Average rainfall in September: 2.17"
The wettest month (with the highest rainfall) is April (4.53").
The driest month (with the least rainfall) is September (2.17").
Average rainfall days in September
Mountain Valley, AR
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is November (10.2 days).
Average snowfall in September
Mountain Valley, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.26").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Mountain Valley, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Mountain Valley, AR
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in September
Mountain Valley, AR
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is July (11.8 days).
Average UV index in September
Mountain Valley, AR
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Mountain Valley, AR
- Average cloud cover in September: 29
The months with the most cloud cover are February and March (Cloud cover 47).
The months with the least cloud cover are June, July, August and September (Cloud cover 29).
Average visibility in September
Mountain Valley, AR
- Average visibility in September: 6mi
The months with the highest visibility are April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March, May and December (5mi).
Mountain Valley, Arkansas, USA
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