September weather forecastPalm City, FL
September
Weather in September
September, the first month of the autumn in Palm City, is still a warm month, with temperature in the range of an average low of 78.3°F (25.7°C) and an average high of 85.3°F (29.6°C).Temperature
Palm City, Florida, marks the onset of September with an average high-temperature of a warm 85.3°F (29.6°C), a subtle shift from August's 87.1°F (30.6°C). Nights in September cool down, indicating a minor disparity from daytime highs with an average low-temperature of 78.3°F (25.7°C).Heat index
The heat index value during September is computed to be a very hot 96.8°F (36°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.Heat index readings emphasize conditions of light breezes and shaded spots. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.
Humidity
In September, the average relative humidity is 77%.Rainfall
In Palm City, in September, during 22.6 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. In Palm City, during the entire year, the rain falls for 168.1 days and collects up to 14.09" (358mm) of precipitation.Ocean temperature
In September, the average ocean temperature in Palm City, Florida, is 84.4°F (29.1°C).Note: With water temperature from 77°F (25°C) to 84.2°F (29°C), all water activities are comfortable and delightful, devoid of discomfort even for lengthened periods.
Daylight
The average length of the day in September in Palm City is 12h and 19min.On the first day of the month, sunrise is at 7:00 am and sunset at 7:41 pm. On the last day of September, in Palm City, sunrise is at 7:13 am and sunset at 7:08 pm EDT.
Sunshine
In September, the average sunshine is 9h.UV index
May through September, with an average maximum UV index of 7, are months with the highest UV index in Palm City. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In September, the maximum UV index of 7 translates into these guidelines:
Fend off overexposure. Sun protection is vital. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Heads up! The reflection of sand and water notably intensifies UV rays from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Palm City, FL
- Average high temperature in September: 85.3°F
The warmest month (with the highest average high temperature) is August (87.1°F).
The month with the lowest average high temperature is January (71.4°F).
- Average low temperature in September: 78.3°F
The month with the highest average low temperature is August (79.3°F).
The coldest month (with the lowest average low temperature) is January (61.2°F).
Average pressure in September
Palm City, FL
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).
Average wind speed in September
Palm City, FL
- Average wind speed in September: 7.9mph
The windiest months (with the highest average wind speed) are January, March and November (10.3mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in September
Palm City, FL
- Average humidity in September: 77%
The months with the highest relative humidity are June and August (78%).
The month with the lowest relative humidity is March (70%).
Average rainfall in September
Palm City, FL
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is August (2.56").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in September
Palm City, FL
- Average rainfall days in September: 22.6 days
The month with the highest number of rainy days is August (23.1 days).
The month with the least rainy days is February (7.7 days).
Average sea temperature in September
Palm City, FL
- Average sea temperature in September: 84.4°F
The best month for swimming (with the highest average sea temperature) is August (85.1°F).
The coldest month (with the lowest average sea temperature) is February (73.3°F).
Average daylight in September /
Average sunshine in September
Palm City, FL
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in September: 9h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 6h and 6min).
Average sunshine days in September
Palm City, FL
- Average sunshine days in September: 4.7 days
The month with the most sunshine days is January (19.5 days).
The month with the least sunshine days is August (3.4 days).
Average UV index in September
Palm City, FL
- Average UV index in September: 7
The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January and December (UV index 5).
Average cloud cover in September
Palm City, FL
- Average cloud cover in September: 29
The months with the most cloud cover are January, November and December (Cloud cover 34).
The months with the least cloud cover are May and July (Cloud cover 26).
Average visibility in September
Palm City, FL
- 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).
