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 tropical 91.2°F (32.9°C) in August to a warm 84.4°F (29.1°C). In September, Blue Mountain experiences a significant drop from daily zeniths to an average nighttime temperature of 62.4°F (16.9°C).Heat index
In September, the heat index is estimated at a hot 91.4°F (33°C). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.Heat index readings emphasize conditions of light breezes and shaded spots. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', provides an understanding of perceived warmth by combining temperature and relative humidity. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Humidity
The average relative humidity in September is 72%.Rainfall
The month with the least rainfall is September, when the rain falls for 10.7 days and typically collects 0.87" (22mm) of precipitation.Snowfall
In Blue Mountain, snow does not fall in April through October.Daylight
In Blue Mountain, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:48 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:59 pm CDT.
Sunshine
In September, the average sunshine is 9.6h.UV index
In Blue Mountain, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 6 during September translates into the following directions:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Blue Mountain have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Blue Mountain, AR
- Average high temperature in September: 84.4°F
The warmest month (with the highest average high temperature) is July (92.7°F).
The month with the lowest average high temperature is January (47.8°F).
- Average low temperature in September: 62.4°F
The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).
Average pressure in September
Blue Mountain, 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 (29.93"Hg).
Average wind speed in September
Blue Mountain, AR
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.2mph).
Average humidity in September
Blue Mountain, AR
- Average humidity in September: 72%
The months with the highest relative humidity are March and May (78%).
The months with the lowest relative humidity are July and August (71%).
Average rainfall in September
Blue Mountain, AR
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is May (2.52").
The driest month (with the least rainfall) is September (0.87").
Average rainfall days in September
Blue Mountain, AR
- Average rainfall days in September: 10.7 days
The month with the highest number of rainy days is May (12.9 days).
The month with the least rainy days is November (7.7 days).
Average snowfall in September
Blue Mountain, AR
- Average snowfall in September: 0"
The months with the highest snowfall are January, February and December (0.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Blue Mountain, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.9 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
Blue Mountain, AR
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in September
Blue Mountain, AR
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is December (21.3 days).
The month with the least sunshine days is July (13.8 days).
Average UV index in September
Blue Mountain, AR
- Average UV index in September: 6
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
Blue Mountain, AR
- Average cloud cover in September: 26
The months with the most cloud cover are February and March (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in September
Blue Mountain, AR
- Average visibility in September: 6mi
The months with the highest visibility are February, March, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, April and May (5mi).
Blue Mountain, Arkansas, USA
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