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
An average high-temperature of a moderately hot 83.3°F (28.5°C) marks September, exhibiting a close resemblance to the conditions in August. Cainhoy's average low-temperature for the month of September records at 73.6°F (23.1°C).Heat index
The heat index value during September is estimated at a hot 91.4°F (33°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.Heat index values are typically calculated for conditions of shade and a light breeze. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', melds the effects of warmth and moisture to generate a feeling of heat. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
Humidity
In September, the average relative humidity is 76%.Rainfall
In Cainhoy, in September, it is raining for 19.4 days, with typically 5.47" (139mm) of accumulated precipitation. Throughout the year, there are 182.9 rainfall days, and 44.69" (1135mm) of precipitation is accumulated.Snowfall
In Cainhoy, snow does not fall in January, March through November.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:54 am and sunset at 7:43 pm. On the last day of September, sunrise is at 7:13 am and sunset at 7:04 pm EDT.
Sunshine
In Cainhoy, the average sunshine in September is 9.2h.UV index
In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the ordinary person.Note: A maximum high daily UV index of 6 during September translates into the following directions:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
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 many days does it rain in September?
When it does not snow?
How many hours of daylight does Cainhoy have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Cainhoy have in September?
What is the UV index reading in September?
Average temperature in September
Cainhoy, SC
- Average high temperature in September: 83.3°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (57.2°F).
- Average low temperature in September: 73.6°F
The month with the highest average low temperature is July (77.9°F).
The coldest month (with the lowest average low temperature) is January (45.1°F).
Average pressure in September
Cainhoy, SC
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Cainhoy, SC
- Average wind speed in September: 8.6mph
The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).
Average humidity in September
Cainhoy, SC
- Average humidity in September: 76%
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are January and March (73%).
Average rainfall in September
Cainhoy, SC
- Average rainfall in September: 5.47"
The wettest month (with the highest rainfall) is August (8.03").
The driest month (with the least rainfall) is January (1.38").
Average rainfall days in September
Cainhoy, SC
- Average rainfall days in September: 19.4 days
The month with the highest number of rainy days is August (25.8 days).
The month with the least rainy days is November (8.6 days).
Average snowfall in September
Cainhoy, SC
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.5").
The months with the least snowfall are January, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Cainhoy, SC
- 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, November and December (0 days).
Average daylight in September /
Average sunshine in September
Cainhoy, SC
- 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 0min).
- Average sunshine in September: 9h and 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Cainhoy, SC
- Average sunshine days in September: 8.1 days
The months with the most sunshine days are January and November (19.3 days).
The month with the least sunshine days is August (3 days).
Average UV index in September
Cainhoy, SC
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in September
Cainhoy, SC
- Average cloud cover in September: 29
The month with the most cloud cover is December (Cloud cover 39).
The months with the least cloud cover are June and July (Cloud cover 26).
Average visibility in September
Cainhoy, 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).
Cainhoy, South Carolina, USA
Weather forecast for your location
2. Allow the app to use your location