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
Entering September, the average high-temperature is recorded at a still tropical 87.4°F (30.8°C), exhibiting a minimal shift from August's 90.5°F (32.5°C). Rock Hill records a consistent low-temperature of 71.2°F (21.8°C) during September nights.Heat index
The heat index value during September is calculated to be a very hot 100.4°F (38°C). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.Metrics for the heat index primarily focus on shaded spots and light wind conditions. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', evaluates the perceived heat by adding the effect of moisture in the air. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important 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.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.
Humidity
In Rock Hill, the average relative humidity in September is 74%.Rainfall
In Rock Hill, Florida, in September, it is raining for 15.5 days, with typically 1.22" (31mm) of accumulated precipitation. Throughout the year, there are 145 rainfall days, and 17.91" (455mm) of precipitation is accumulated.Snowfall
In Rock Hill, snow does not fall in February through December.Daylight
In Rock Hill, the average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 6:21 am and sunset at 7:07 pm. On the last day of September, sunrise is at 6:37 am and sunset at 6:30 pm CDT.
Sunshine
The average sunshine in September in Rock Hill is 9.2h.UV index
The average daily maximum UV index in September in Rock Hill is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The UV index of 6 during September translates into the following guidance:
Deter overexposure. Protecting against the sun's effects is essential. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Frequently asked questions
How hot is September in Rock Hill?
What is the average humidity in September in Rock Hill?
How many days does it rain in September in Rock Hill?
When it does not snow in Rock Hill?
How many hours of daylight does Rock Hill have in September?
What time are sunrise and sunset in September in Rock Hill?
How long on average sun shines in September in Rock Hill?
What is the UV index intensity in September in Rock Hill?
Average temperature in September
Rock Hill, FL
- Average high temperature in September: 87.4°F
The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is January (59.4°F).
- Average low temperature in September: 71.2°F
The month with the highest average low temperature is August (75.6°F).
The coldest month (with the lowest average low temperature) is January (43.3°F).
Average pressure in September
Rock Hill, FL
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
Average wind speed in September
Rock Hill, FL
- Average wind speed in September: 5.1mph
The windiest months (with the highest average wind speed) are January, February and March (7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Rock Hill, FL
- Average humidity in September: 74%
The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are May and October (70%).
Average rainfall in September
Rock Hill, FL
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is August (2.95").
The driest months (with the least rainfall) are January and November (0.83").
Average rainfall days in September
Rock Hill, FL
- Average rainfall days in September: 15.5 days
The month with the highest number of rainy days is August (21.3 days).
The month with the least rainy days is November (6.8 days).
Average snowfall in September
Rock Hill, FL
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Rock Hill, FL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Rock Hill, FL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is June (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 5h and 24min).
Average sunshine days in September
Rock Hill, FL
- Average sunshine days in September: 11.7 days
The month with the most sunshine days is November (21.8 days).
The months with the least sunshine days are July and August (6.3 days).
Average UV index in September
Rock Hill, FL
- 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
Rock Hill, FL
- Average cloud cover in September: 26
The months with the most cloud cover are February and December (Cloud cover 42).
The month with the least cloud cover is October (Cloud cover 24).
Average visibility in September
Rock Hill, 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).
Rock Hill, Florida, USA
Weather forecast for your location
2. Allow the app to use your location
