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 sea temperature 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
During the shift to September, a minor reduction in average high-temperature is observed, shifting from a moderately hot 82.6°F (28.1°C) in August to a still warm 76.6°F (24.8°C). Rock Hall's temperature in September lowers to a consistent average of 62.8°F (17.1°C) during the nights.Humidity
In September, the average relative humidity is 77%.Rainfall
In September, the rain falls for 9.6 days. Throughout September, 0.67" (17mm) of precipitation is accumulated. Throughout the year, there are 120.1 rainfall days, and 12.87" (327mm) of precipitation is accumulated.Snowfall
In Rock Hall, snow does not fall in May through November.Ocean temperature
In Rock Hall, the average seawater temperature in September is 73°F (22.8°C).Note: For those not fond of cold temperatures, taking a swim at 73°F (22.8°C) may require consideration of the sunshine, wind, and ambient temperature. While wetsuits are not mandatory, they can enhance the experience.
Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 6:34 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:48 pm EDT.
Sunshine
The average sunshine in September is 9.4h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In September, the maximum UV index of 5 transforms into these recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Always opt for UVA and UVB-resistant sunglasses on radiant days. Be careful! The Sun's UV radiation is accentuated by reflecting off sand and water.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Rock Hall in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the water temperature in September?
How many hours of daylight does Rock Hall have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Rock Hall, MD
- Average high temperature in September: 76.6°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (39.2°F).
- Average low temperature in September: 62.8°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).
Average pressure in September
Rock Hall, MD
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Rock Hall, MD
- Average wind speed in September: 7mph
The windiest months (with the highest average wind speed) are January, February and March (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in September
Rock Hall, MD
- Average humidity in September: 77%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is November (73%).
Average rainfall in September
Rock Hall, MD
- Average rainfall in September: 0.67"
The wettest months (with the highest rainfall) are July and August (1.81").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in September
Rock Hall, MD
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is July (14.6 days).
The month with the least rainy days is November (5.6 days).
Average snowfall in September
Rock Hall, MD
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.83").
The months with the least snowfall are May, June, July, August, September, October and November (0").
Average snowfall days in September
Rock Hall, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Rock Hall, MD
- Average sea temperature in September: 73.1°F
The best month for swimming (with the highest average sea temperature) is August (77.2°F).
The coldest month (with the lowest average sea temperature) is February (43.7°F).
Average daylight in September /
Average sunshine in September
Rock Hall, MD
- 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: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in September
Rock Hall, MD
- Average sunshine days in September: 17.6 days
The months with the most sunshine days are January and November (21.9 days).
The month with the least sunshine days is July (14.1 days).
Average UV index in September
Rock Hall, MD
- Average UV index in September: 5
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 and December (UV index 2).
Average cloud cover in September
Rock Hall, MD
- Average cloud cover in September: 33
The months with the most cloud cover are February, March and December (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in September
Rock Hall, MD
- 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 Hall, Maryland, USA
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