September weather forecast
Prospect Bay, MD

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Prospect Bay, Maryland, with temperature in the range of an average high of 77.4°F (25.2°C) and an average low of 63.5°F (17.5°C).

Temperature

Upon the beginning of September, Prospect Bay's high-temperatures register at a still warm 77.4°F (25.2°C), closely mirroring the preceding month. The temperature lowers to an average of 63.5°F (17.5°C) during September nights.

Humidity

In Prospect Bay, the average relative humidity in September is 77%.

Rainfall

September is the month with the least rainfall. Rain falls for 12.5 days and accumulates 1.89" (48mm) of precipitation.

Snowfall

In Prospect Bay, snow does not fall in May through October.

Daylight

In Prospect Bay, the average length of the day in September is 12h and 26min.
On the first day of September, sunrise is at 6:34 am and sunset at 7:34 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 9.3h.

UV index

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: The maximum daily UV index of 5 during September translates into the following directions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.

Frequently asked questions

What are the temperatures in September?

September temperatures vary between a high-temperature of 77.4°F (25.2°C) and a low-temperature of 63.5°F (17.5°C). In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is appraised at 89.6°F (32°C).

What is the average humidity in September in Prospect Bay?

The average relative humidity in September is 77%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 12.5 days and typically collects 1.89" (48mm) of precipitation.

How many days does it rain in September?

In Prospect Bay, in September, during 12.5 rainfall days, 1.89" (48mm) of precipitation is typically accumulated.

When it does not snow in Prospect Bay?

May through October are months without snowfall.

How many hours of daylight does Prospect Bay have in September?

The average day length in September is 12h and 26min.

When are sunrise and sunset in September?

On the first day of September, sunrise is at 6:34 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:48 pm EDT.

How many hours of sunshine does Prospect Bay have in September?

The average sunshine duration in September is 9.3h.

What is the UV index intensity in September?

The average daily maximum UV index in September in Prospect Bay, Maryland, is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe exposure to Sun's UV rays.
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
Prospect Bay, MD

Average temperature in September - Prospect Bay, MD
  • Average high temperature in September: 77.4°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 (40.1°F).

  • Average low temperature in September: 63.5°F

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).

Average pressure in September
Prospect Bay, MD

Average pressure in September - Prospect Bay, 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
Prospect Bay, MD

Average wind speed in September - Prospect Bay, MD
  • Average wind speed in September: 7.4mph

The windiest months (with the highest average wind speed) are February and March (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

Average humidity in September
Prospect Bay, MD

Average humidity in September - Prospect Bay, MD
  • Average humidity in September: 77%

The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January and November (73%).

Average rainfall in September
Prospect Bay, MD

Average rainfall in September - Prospect Bay, MD
  • Average rainfall in September: 1.89"

The wettest month (with the highest rainfall) is July (3.31").
The driest month (with the least rainfall) is September (1.89").

Average rainfall days in September
Prospect Bay, MD

Average rainfall days in September - Prospect Bay, MD
  • Average rainfall days in September: 12.5 days

The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is November (8.8 days).

Average snowfall in September
Prospect Bay, MD

Average snowfall in September - Prospect Bay, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is January (1.42").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Prospect Bay, MD

Average snowfall days in September - Prospect Bay, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.2 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
Prospect Bay, MD

Average daylight in September / Average sunshine in September - Prospect Bay, 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 0min).

Average sunshine days in September
Prospect Bay, MD

Average sunshine days in September - Prospect Bay, MD
  • Average sunshine days in September: 16.2 days

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (11.1 days).

Average UV index in September
Prospect Bay, MD

Average UV index in September - Prospect Bay, 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 and December (UV index 2).

Average cloud cover in September
Prospect Bay, MD

Average cloud cover in September - Prospect Bay, MD
  • Average cloud cover in September: 34

The months with the most cloud cover are February, March and December (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).

Average visibility in September
Prospect Bay, MD

Average visibility in September - Prospect Bay, 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).

Prospect Bay, Maryland, USA

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