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
September's arrival subtly correlates with a reduction in the average high-temperature, down from a moderately hot 84.7°F (29.3°C) in August to a still warm 78.1°F (25.6°C). In the month of September, the average temperature dips to a refreshing 57.4°F (14.1°C) during the night.Humidity
The months with the lowest humidity are August and September, with an average relative humidity of 75%.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
May through September are months without snowfall in Rocky Hill.Daylight
In September, the average length of the day 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, in Rocky Hill, sunrise is at 7:25 am and sunset at 7:13 pm EDT.
Sunshine
The average sunshine in September in Rocky Hill is 8h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the UV index of 4 transforms into the following advice:
Take precautions - Protection against sunburn is recommended. To guard against the harmful effects of the Sun, minimize exposure during midday. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Frequently asked questions
What are September temperatures in Rocky Hill?
What are the least humid months in Rocky Hill?
What is the average humidity in September in Rocky Hill?
What is the driest month in Rocky Hill?
How many days does it rain in September in Rocky Hill?
When it does not snow in Rocky Hill?
Does it snow in Rocky Hill in September?
What is the average length of the day in September in Rocky Hill?
What time are sunrise and sunset in September in Rocky Hill?
How long on average sun shines in September in Rocky Hill?
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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