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
The onset of September results in a small decrease in the average high-temperature, moderately receding from 84.7°F (29.3°C) in August to a still warm 78.1°F (25.6°C). Rocky Hill registers a consistent average low-temperature of 57.4°F (14.1°C) during September.Humidity
August and September, with an average relative humidity of 75%, are the least humid months.Rainfall
The months with the least rainfall in Rocky Hill are September and November Rain falls for 7.9 days and accumulates 0.75" (19mm) of rain.Snowfall
In Rocky Hill, snow does not fall in May through September.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:59 am and sunset at 8:00 pm. On the last day of September, sunrise is at 7:25 am and sunset at 7:13 pm EDT.
Sunshine
The average sunshine in September is 8h.UV index
The average daily maximum UV index in September in Rocky Hill is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In September, an average UV index of 4 transforms into the following instructions:
Guard yourself - Avoiding sunburn is suggested. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the least humid month?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
Does it snow in Rocky Hill in September?
How many hours of daylight does Rocky Hill have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September in Rocky Hill?
Average temperature in September
Rocky Hill, OH
- Average high temperature in September: 78.1°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 (37°F).
- Average low temperature in September: 57.4°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).
Average pressure in September
Rocky Hill, OH
- Average pressure in September: 30.05"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Rocky Hill, OH
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is February (7.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in September
Rocky Hill, OH
- Average humidity in September: 75%
The months with the highest relative humidity are January and February (82%).
The months with the lowest relative humidity are August and September (75%).
Average rainfall in September
Rocky Hill, OH
- Average rainfall in September: 0.75"
The wettest month (with the highest rainfall) is May (1.57").
The driest months (with the least rainfall) are September and November (0.75").
Average rainfall days in September
Rocky Hill, OH
- Average rainfall days in September: 7.9 days
The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is November (6.5 days).
Average snowfall in September
Rocky Hill, OH
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.3").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Rocky Hill, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rocky Hill, OH
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
Rocky Hill, OH
- Average sunshine days in September: 19.2 days
The month with the most sunshine days is November (21.6 days).
The month with the least sunshine days is May (13.3 days).
Average UV index in September
Rocky Hill, OH
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Rocky Hill, OH
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Rocky Hill, OH
- Average visibility in September: 5mi
The months with the highest visibility are March, April, October and November (6mi).
The months with the lowest visibility are January, February, May, June, July, August, September and December (5mi).
Rocky Hill, Ohio, USA
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