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
With the onset of September, the average high-temperature subtly recedes from August's warm 78.4°F (25.8°C) to an agreeable 71.2°F (21.8°C). During the nights in September, Rock Hill experiences a consistent average temperature of 50.9°F (10.5°C).Humidity
In Rock Hill, the average relative humidity in September is 80%.Rainfall
In September, the rain falls for 11.9 days. Throughout September, 1.81" (46mm) of precipitation is accumulated. Throughout the year, there are 153.7 rainfall days, and 26.73" (679mm) of precipitation is accumulated.Snowfall
In Rock Hill, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:25 am and sunset at 7:31 pm. On the last day of September, in Rock Hill, sunrise is at 6:54 am and sunset at 6:41 pm EDT.
Sunshine
The average sunshine in September in Rock Hill is 8.5h.UV index
The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: A daily maximum UV index of 3 in September translates into the following instructions:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Rock Hill have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Rock Hill, NY
- Average high temperature in September: 71.2°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in September
Rock Hill, NY
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Rock Hill, NY
- Average wind speed in September: 5.2mph
The windiest months (with the highest average wind speed) are January and February (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Rock Hill, NY
- Average humidity in September: 80%
The months with the highest relative humidity are February and December (85%).
The month with the lowest relative humidity is July (77%).
Average rainfall in September
Rock Hill, NY
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is May (2.8").
The driest months (with the least rainfall) are January and February (1.65").
Average rainfall days in September
Rock Hill, NY
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in September
Rock Hill, NY
- Average snowfall in September: 0"
The month with the highest snowfall is December (5.04").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Rock Hill, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (10.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rock Hill, NY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days in September
Rock Hill, NY
- Average sunshine days in September: 15.8 days
The month with the most sunshine days is January (18.3 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in September
Rock Hill, NY
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Rock Hill, NY
- Average cloud cover in September: 42
The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is July (Cloud cover 38).
Average visibility in September
Rock Hill, NY
- Average visibility in September: 4mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (5mi).
The months with the lowest visibility are May and September (4mi).
Rock Hill, New York, USA
Weather forecast for your location
2. Allow the app to use your location