September weather forecast
Rosaryville, MD

Share

Weather in September

September, the first month of the autumn in Rosaryville, is also a moderately hot month, with an average temperature ranging between min 63°F (17.2°C) and max 78.3°F (25.7°C).

Temperature

September implies a soft temperature shift, with average high-temperatures reducing from August's 84.6°F (29.2°C) to a still moderately hot 78.3°F (25.7°C). Throughout September, the temperature tends to fall to a consistent average low of 63°F (17.2°C).

Humidity

In Rosaryville, Maryland, the average relative humidity in September is 75%.

Rainfall

In September, the rain falls for 13.9 days. Throughout September, 2.36" (60mm) of precipitation is accumulated. Throughout the year, in Rosaryville, there are 164.8 rainfall days, and 32.87" (835mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall.

Daylight

In Rosaryville, the average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:37 am and sunset at 7:37 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:51 pm EDT.

Sunshine

The average sunshine in September is 9.1h.

UV index

In Rosaryville, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: In September, the UV index of 5 transforms into the following advice:
Take precautions - Protection against sun damage is advised. When the Sun is at its strongest around midday, find shade and limit exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Updated: Jul 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature in Rosaryville?

The high-temperature, in September, in Rosaryville, records 78.3°F (25.7°C), while the low-temperature is 63°F (17.2°C). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines relative humidity and air temperature, is evaluated at 93.2°F (34°C).

What is the average humidity in September in Rosaryville?

In September, the average relative humidity is 75%.

How many days does it rain in September in Rosaryville?

In Rosaryville, during September, the rain falls for 13.9 days and regularly aggregates up to 2.36" (60mm) of precipitation.

When it does not snow in Rosaryville?

In Rosaryville, snow does not fall in May through October.

How many hours of daylight does Rosaryville have in September?

In Rosaryville, the average day length in September is 12h and 26min.

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 6:37 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:51 pm EDT.

How long on average sun shines in September?

In September, the average sunshine duration is 9.1h.

How high is the UV index in September?

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Rosaryville, MD

Average temperature in September - Rosaryville, MD
  • Average high temperature in September: 78.3°F

The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (40.1°F).

  • Average low temperature in September: 63°F

The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (28.2°F).

Average pressure in September
Rosaryville, MD

Average pressure in September - Rosaryville, MD
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in September
Rosaryville, MD

Average wind speed in September - Rosaryville, MD
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.4mph).

Average humidity in September
Rosaryville, MD

Average humidity in September - Rosaryville, MD
  • Average humidity in September: 75%

The month with the highest relative humidity is May (77%).
The months with the lowest relative humidity are January, March and April (72%).

Average rainfall in September
Rosaryville, MD

Average rainfall in September - Rosaryville, MD
  • Average rainfall in September: 2.36"

The wettest month (with the highest rainfall) is August (3.94").
The driest month (with the least rainfall) is January (2.05").

Average rainfall days in September
Rosaryville, MD

Average rainfall days in September - Rosaryville, MD
  • Average rainfall days in September: 13.9 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (8.8 days).

Average snowfall in September
Rosaryville, MD

Average snowfall in September - Rosaryville, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is January (2.76").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Rosaryville, MD

Average snowfall days in September - Rosaryville, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Rosaryville, MD

Average daylight in September / Average sunshine in September - Rosaryville, MD
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 9h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

Average sunshine days in September
Rosaryville, MD

Average sunshine days in September - Rosaryville, MD
  • Average sunshine days in September: 14.7 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (10.8 days).

Average UV index in September
Rosaryville, MD

Average UV index in September - Rosaryville, 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, November and December (UV index 2).

Average cloud cover in September
Rosaryville, MD

Average cloud cover in September - Rosaryville, MD
  • Average cloud cover in September: 34

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 29).

Average visibility in September
Rosaryville, MD

Average visibility in September - Rosaryville, 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).

Rosaryville, Maryland, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location