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
Norristown experiences a minor change to a moderately hot 84.9°F (29.4°C) in average high-temperature during September, closely reflecting August. In the month of September, Norristown records a consistent average low-temperature of 68.2°F (20.1°C).Heat index
The heat index in September is computed to be a sweltering 95°F (35°C). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.The heat index's values are generally associated with conditions in shade and light breezes. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.
Humidity
The average relative humidity in September is 75%.Rainfall
In Norristown, in September, during 12.5 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. Throughout the year, in Norristown, there are 136.8 rainfall days, and 17.05" (433mm) of precipitation is accumulated.Snowfall
In Norristown, snow does not fall in March through December.Daylight
In September, the average length of the day is 12h and 22min.On the first day of September, sunrise is at 7:05 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:15 pm EDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.Note: A daily high UV index of 6 in September leads to these guidelines:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Frequently asked questions
How hot does it get in Norristown in September?
What is the average humidity in September in Norristown?
How many days does it rain in September in Norristown?
When it does not snow in Norristown?
How many hours of daylight does Norristown have in September?
What time are sunrise and sunset in September in Norristown?
How long on average sun shines in September in Norristown?
How high is the UV index in September in Norristown?
Average temperature in September
Norristown, GA
- Average high temperature in September: 84.9°F
The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (55.9°F).
- Average low temperature in September: 68.2°F
The month with the highest average low temperature is July (73.4°F).
The coldest month (with the lowest average low temperature) is January (39.6°F).
Average pressure in September
Norristown, GA
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).
Average wind speed in September
Norristown, GA
- Average wind speed in September: 6.2mph
The windiest months (with the highest average wind speed) are February and March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Norristown, GA
- Average humidity in September: 75%
The months with the highest relative humidity are August and December (76%).
The months with the lowest relative humidity are January and November (71%).
Average rainfall in September
Norristown, GA
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is August (2.09").
The driest month (with the least rainfall) is November (0.94").
Average rainfall days in September
Norristown, GA
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is November (6.6 days).
Average snowfall in September
Norristown, GA
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.04").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Norristown, GA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Norristown, GA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in September
Norristown, GA
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is July (10.4 days).
Average UV index in September
Norristown, GA
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Norristown, GA
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 42).
The month with the least cloud cover is October (Cloud cover 27).
Average visibility in September
Norristown, GA
- 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).
Norristown, Georgia, USA
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