September weather forecastGrainola, OK
September
Weather in September
The first month of the autumn, September, is still a warm month in Grainola, Oklahoma, with an average temperature ranging between min 63.7°F (17.6°C) and max 82.8°F (28.2°C).Temperature
Grainola's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's hot 90.3°F (32.4°C) to a warm 82.8°F (28.2°C). In the month of September, Grainola experiences an average low-temperature of 63.7°F (17.6°C).Heat index
During September, the heat index is estimated at a tropical 87.8°F (31°C). With ongoing exposure and activity, one might experience weariness, and heat cramps could ensue.Bear in mind that the heat index values are determined for shaded areas and light breezes. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', comes about by integrating the temperature readings with the humidity levels. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are especially crucial for babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Humidity
In Grainola, the average relative humidity in September is 68%.Rainfall
In Grainola, during September, the rain falls for 10.3 days and regularly aggregates up to 0.98" (25mm) of precipitation. Throughout the year, there are 97.1 rainfall days, and 10.87" (276mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall in Grainola.Daylight
In Grainola, the average length of the day in September is 12h and 24min.On the first day of September, sunrise is at 6:58 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:10 pm CDT.
Sunshine
In Grainola, the average sunshine in September is 8.8h.UV index
In Grainola, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Grainola, OK
- Average high temperature in September: 82.8°F
The warmest month (with the highest average high temperature) is July (92.1°F).
The month with the lowest average high temperature is January (45°F).
- Average low temperature in September: 63.7°F
The month with the highest average low temperature is July (71.8°F).
The coldest month (with the lowest average low temperature) is January (28.9°F).
Average pressure in September
Grainola, OK
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Grainola, OK
- Average wind speed in September: 8.6mph
The windiest month (with the highest average wind speed) is April (11.5mph).
The calmest months (with the lowest average wind speed) are July and August (8.1mph).
Average humidity in September
Grainola, OK
- Average humidity in September: 68%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is October (65%).
Average rainfall in September
Grainola, OK
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is May (2.17").
The driest month (with the least rainfall) is December (0.24").
Average rainfall days in September
Grainola, OK
- Average rainfall days in September: 10.3 days
The month with the highest number of rainy days is May (12.3 days).
The months with the least rainy days are January and December (3.6 days).
Average snowfall in September
Grainola, OK
- Average snowfall in September: 0"
The months with the highest snowfall are January, February and March (0.2").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Grainola, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grainola, OK
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is August (Average sunshine: 11h and 12min).
The months with the least sunshine are January and December (Average sunshine: 6h and 6min).
Average sunshine days in September
Grainola, OK
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is January (26.2 days).
The month with the least sunshine days is May (15.8 days).
Average UV index in September
Grainola, OK
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Grainola, OK
- Average cloud cover in September: 26
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in September
Grainola, OK
- 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).
