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
September's commencement is accompanied by an average high-temperature of a warm 83.7°F (28.7°C), diverging marginally from August's 88.3°F (31.3°C). Effingham's temperature drops to an average low of 66.2°F (19°C) during the nights of September.Heat index
The heat index for September is appraised at a tropical 91.4°F (33°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.Remember that heat index calculations are made for conditions in the shade with light wind. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', gives a temperature feeling by integrating air temperature and humidity. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
Humidity
In September, the average relative humidity is 77%.Rainfall
In Effingham, in September, during 14.5 rainfall days, 2.95" (75mm) of precipitation is typically accumulated. In Effingham, during the entire year, the rain falls for 168.6 days and collects up to 33.82" (859mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:53 am and sunset at 7:44 pm. On the last day of September, sunrise is at 7:13 am and sunset at 7:04 pm EDT.
Sunshine
The average sunshine in September is 9.2h.UV index
In Effingham, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A typical high UV index of 6 in September suggests the following recommendations:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
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?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Effingham have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Effingham have in September?
How high is the UV index in September in Effingham?
Average temperature in September
Effingham, SC
- Average high temperature in September: 83.7°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (52.3°F).
- Average low temperature in September: 66.2°F
The month with the highest average low temperature is July (72.3°F).
The coldest month (with the lowest average low temperature) is January (37°F).
Average pressure in September
Effingham, SC
- Average pressure in September: 30.01"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Effingham, SC
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is April (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Effingham, SC
- Average humidity in September: 77%
The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January and November (72%).
Average rainfall in September
Effingham, SC
- Average rainfall in September: 2.95"
The wettest month (with the highest rainfall) is August (3.82").
The driest month (with the least rainfall) is January (1.65").
Average rainfall days in September
Effingham, SC
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is July (20.5 days).
The month with the least rainy days is November (8.6 days).
Average snowfall in September
Effingham, SC
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.06").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Effingham, SC
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.8 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
Effingham, SC
- 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 1min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Effingham, SC
- Average sunshine days in September: 13.7 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (8.1 days).
Average UV index in September
Effingham, SC
- 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 January (UV index 2).
Average cloud cover in September
Effingham, SC
- Average cloud cover in September: 33
The months with the most cloud cover are February and December (Cloud cover 41).
The months with the least cloud cover are June and October (Cloud cover 29).
Average visibility in September
Effingham, SC
- 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).
Effingham, South Carolina, USA
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