September weather forecastGriffintown, TN
September
Weather in September
September, the first month of the autumn in Griffintown, is still a warm month, with an average temperature ranging between max 81.3°F (27.4°C) and min 61.7°F (16.5°C).Temperature
The start of September comes with a small reduction in the average high-temperature, subtly receding from a hot 86.7°F (30.4°C) in August to a warm 81.3°F (27.4°C). During September, the temperature tends to dip to an average of 61.7°F (16.5°C) at night.Heat index
The heat index value during September is calculated to be a hot 86°F (30°C). Prolonged activity during exposure might result in a state of fatigue and cause heat cramps.Heat index specifics point out values are for conditions of shade and a slight breeze. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is achieved by amalgamating air temperature with the relative humidity readings. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly relevant to children. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
Humidity
In Griffintown, the average relative humidity in September is 76%.Rainfall
In Griffintown, in September, during 13.1 rainfall days, 1.73" (44mm) of precipitation is typically accumulated. In Griffintown, during the entire year, the rain falls for 158.3 days and collects up to 26.57" (675mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 24min.On the first day of the month, sunrise is at 6:20 am and sunset at 7:15 pm. On the last day of September, sunrise is at 6:43 am and sunset at 6:33 pm CDT.
Sunshine
The average sunshine in September is 8.6h.UV index
In Griffintown, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 5 in September translates into the following instructions:
Be vigilant - Preventing sunburn is recommended. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Griffintown, TN
- Average high temperature in September: 81.3°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (44.2°F).
- Average low temperature in September: 61.7°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in September
Griffintown, TN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Griffintown, TN
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is February (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in September
Griffintown, TN
- Average humidity in September: 76%
The months with the highest relative humidity are March and December (79%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Griffintown, TN
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is July (3.5").
The driest month (with the least rainfall) is November (1.42").
Average rainfall days in September
Griffintown, TN
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is July (19 days).
The month with the least rainy days is November (8.6 days).
Average snowfall in September
Griffintown, TN
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.79").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Griffintown, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (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
Griffintown, TN
- Average daylight in September: 12h and 24min
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: 8h and 36min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Griffintown, TN
- Average sunshine days in September: 15 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in September
Griffintown, TN
- 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 and December (UV index 2).
Average cloud cover in September
Griffintown, TN
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in September
Griffintown, TN
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
