September weather forecastIsland of Palms, SC
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Island of Palms, South Carolina, with temperature in the range of an average low of 74.1°F (23.4°C) and an average high of 82.6°F (28.1°C).Temperature
Island of Palms in September witnesses an average high-temperature of a still warm 82.6°F (28.1°C), indicating a slight variation from August's 85.8°F (29.9°C). Island of Palms registers a subtle dip to an average of 74.1°F (23.4°C) during the nights of September.Heat index
In September, the average heat index is appraised at a hot 89.6°F (32°C). If exposure and activity persist, fatigue could ensue, possibly leading to heat cramps.When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are particularly meaningful for babies and toddlers. 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.
Humidity
In Island of Palms, the average relative humidity in September is 76%.Rainfall
In Island of Palms, in September, during 18.5 rainfall days, 5.67" (144mm) of precipitation is typically accumulated. Throughout the year, in Island of Palms, there are 184.5 rainfall days, and 45.83" (1164mm) of precipitation is accumulated.Snowfall
In Island of Palms, 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 6:54 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 7:04 pm EDT.
Sunshine
In Island of Palms, South Carolina, the average sunshine in September is 9.2h.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 unsafe exposure to UV radiation for ordinary individuals.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Island of Palms, SC
- Average high temperature in September: 82.6°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (57°F).
- Average low temperature in September: 74.1°F
The month with the highest average low temperature is July (78.4°F).
The coldest month (with the lowest average low temperature) is January (45.7°F).
Average pressure in September
Island of Palms, 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
Island of Palms, SC
- Average wind speed in September: 9.4mph
The windiest months (with the highest average wind speed) are March and April (10.6mph).
The calmest month (with the lowest average wind speed) is August (8.6mph).
Average humidity in September
Island of Palms, 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
Island of Palms, SC
- Average rainfall in September: 5.67"
The wettest month (with the highest rainfall) is August (7.83").
The driest month (with the least rainfall) is January (1.54").
Average rainfall days in September
Island of Palms, SC
- Average rainfall days in September: 18.5 days
The month with the highest number of rainy days is August (25.2 days).
The month with the least rainy days is November (9.9 days).
Average snowfall in September
Island of Palms, SC
- 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
Island of Palms, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.5 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
Island of Palms, SC
- Average daylight in September: 12h and 24min
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 12min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Island of Palms, SC
- Average sunshine days in September: 8.3 days
The month with the most sunshine days is January (18.1 days).
The month with the least sunshine days is August (2.5 days).
Average UV index in September
Island of Palms, SC
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in September
Island of Palms, SC
- Average cloud cover in September: 28
The month with the most cloud cover is December (Cloud cover 39).
The month with the least cloud cover is June (Cloud cover 25).
Average visibility in September
Island of Palms, 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).
