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
In September, the meteorological conditions change slightly, with the average high-temperature moving from a tropical 91.9°F (33.3°C) in August to a still hot 86.2°F (30.1°C). An average low-temperature of 65.3°F (18.5°C) is observed during September nights in Grapevine.Heat index
September's mean heat index is appraised at a very hot 96.8°F (36°C). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.Heat index data is primarily for areas with shade and subjected to light winds. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', melds the effects of warmth and moisture to generate a feeling of heat. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.
Humidity
The average relative humidity in September in Grapevine is 72%.Rainfall
September is the month with the least rainfall. Rain falls for 11.2 days and accumulates 1.73" (44mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
In September, the average length of the day in Grapevine is 12h and 22min.On the first day of the month, sunrise is at 6:43 am and sunset at 7:34 pm. On the last day of September, in Grapevine, sunrise is at 7:03 am and sunset at 6:54 pm CDT.
Sunshine
In Grapevine, the average sunshine in September is 9.6h.UV index
In Grapevine, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: A maximum high daily UV index of 6 during September translates into the following directions:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September in Grapevine?
What is the average humidity in September in Grapevine?
What is the driest month in Grapevine?
How much does it rain in Grapevine in September?
When it does not snow in Grapevine?
How many hours of daylight does Grapevine have in September?
When are sunrise and sunset in September in Grapevine?
How many hours of sunshine does Grapevine have in September?
How high is the UV index in September in Grapevine?
Average temperature in September
Grapevine, AR
- Average high temperature in September: 86.2°F
The warmest month (with the highest average high temperature) is July (92.8°F).
The month with the lowest average high temperature is January (50°F).
- Average low temperature in September: 65.3°F
The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).
Average pressure in September
Grapevine, AR
- Average pressure in September: 30"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
Grapevine, AR
- Average wind speed in September: 5.2mph
The windiest months (with the highest average wind speed) are March and April (7.7mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Grapevine, AR
- Average humidity in September: 72%
The month with the highest relative humidity is March (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Grapevine, AR
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is April (4.41").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in September
Grapevine, AR
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is November (9.4 days).
Average snowfall in September
Grapevine, AR
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.67").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Grapevine, AR
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (1.3 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
Grapevine, 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 4min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in September
Grapevine, AR
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is October (19.4 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in September
Grapevine, AR
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Grapevine, AR
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 26).
Average visibility in September
Grapevine, AR
- 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).
Grapevine, Arkansas, USA
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