September weather forecast
Selby-on-the-Bay, MD

Today
Tomorrow
Long-term
YearJFMAMJJASeptemberOND
°Celsius°Fahrenheit
Share

Contents

Weather in September

The arrival of September signals a significant weather shift in Selby-on-the-Bay. The mercury dips down, with the monthly high averaging at 77°F (25°C). With the number of sunshine hours reducing and a decrease in sea temperature, one can attribute this month to the start of Autumn. As the leaves start to change their colors, the overall visibility around the town remains excellent, making it an ideal time for drives and walks. While the weather is still warm, it is considerably milder than the preceding summer months.

Temperature

As August transitions into September, Selby-on-the-Bay sees a gentle drop in the average high-temperature, transitioning from a warm 83.3°F (28.5°C) to a still moderately hot 77°F (25°C). Selby-on-the-Bay's temperature lowers to a mean of 64.6°F (18.1°C) during the nights in September.

Humidity

In September, the average relative humidity in Selby-on-the-Bay is 75%.

Rainfall

In September, in Selby-on-the-Bay, the rain falls for 10.5 days. Throughout September, 0.63" (16mm) of precipitation is accumulated. Throughout the year, there are 120.4 rainfall days, and 10.47" (266mm) of precipitation is accumulated.

Snowfall

In Selby-on-the-Bay, snow does not fall in April through October.

Ocean temperature

In Selby-on-the-Bay, in September, the average water temperature is 74.1°F (23.4°C).
Note: Taking into account a person's sensitivity to the cold, given sunshine, wind, and air temperature, swimming in 74.1°F (23.4°C) might be pleasant. (FYI: The water temperature set for the Olympic swimming event is between 77°F (25°C) and 82.4°F (28°C).)

Daylight

In Selby-on-the-Bay, Maryland, the average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:35 am and sunset at 7:36 pm. On the last day of September, in Selby-on-the-Bay, Maryland, sunrise is at 7:01 am and sunset at 6:49 pm EDT.

Sunshine

The average sunshine in September in Selby-on-the-Bay, Maryland, is 9.2h.

UV index

The average daily maximum UV index in September in Selby-on-the-Bay is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the UV index of 5 transforms into the following advice:
Undertake protective steps - Recommendations to avoid sunburn are issued. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Enhance your sun protection with tightly woven, yet airy clothing. Be wary! Reflections from sand and water make UV radiation more intense.
[Resources]

Frequently asked questions

What is the temperature in September in Selby-on-the-Bay?

The high-temperature during September is 77°F (25°C) and the low-temperature is 64.6°F (18.1°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is computed to be 89.6°F (32°C).

What is the average humidity in September in Selby-on-the-Bay?

The average relative humidity in September in Selby-on-the-Bay is 75%.

How many days does it rain in September in Selby-on-the-Bay?

In Selby-on-the-Bay, Maryland, during September, the rain falls for 10.5 days and regularly aggregates up to 0.63" (16mm) of precipitation.

When it does not snow in Selby-on-the-Bay?

April through October are months without snowfall in Selby-on-the-Bay.

How warm is the water in September in Selby-on-the-Bay?

In Selby-on-the-Bay, Maryland, in September, the average water temperature is 74.1°F (23.4°C). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 74.1°F (23.4°C) water may be enjoyable.

How many hours of daylight does Selby-on-the-Bay have in September?

The average day length in September in Selby-on-the-Bay is 12h and 26min.

When are sunrise and sunset in September in Selby-on-the-Bay?

In September, on the first day of the month, sunrise is at 6:35 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:49 pm EDT.

How long on average sun shines in September in Selby-on-the-Bay?

In September, the average sunshine duration is 9.2h.

What is the UV index intensity in September in Selby-on-the-Bay?

In September, the average daily maximum UV index in Selby-on-the-Bay, Maryland, is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJASeptemberOND
Aug
September
Oct
Average high temperature
83.3°F 28.5°C
77°F 25°C
66.2°F 19°C
Average low temperature
70.5°F 21.4°C
64.6°F 18.1°C
54.5°F 12.5°C
Average pressure
29.99" 762mmHg
30.05" 763mmHg
30.03" 763mmHg
Average wind speed
6.6mph 10.6km/h
7.6mph 12.2km/h
9mph 14.5km/h
Average max. wind speed
7.2mph 11.6km/h
7.9mph 12.7km/h
9.7mph 15.6km/h
Average wind speed gusts
10.5mph 16.9km/h
11.9mph 19.2km/h
14.5mph 23.3km/h
Average humidity
74%
75%
75%
Average rainfall
1.69" 43mm
0.63" 16mm
0.87" 22mm
Average rainfall days
14.3
10.5
8.8
Average snowfall
0" 0mm
0" 0mm
0" 0mm
Average snowfall days
0
0
0
Average sea temperature
78°F 25.6°C
74.2°F 23.4°C
67.2°F 19.6°C
Average daylight
13h 4min
12h 2min
11h 1min
Average sunshine
10h 3min
9h 1min
5h 4min
Average sunshine days
13.8
17.4
20
Average UV index
6
5
4
Average cloud cover
29%
33%
37%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in September
Selby-on-the-Bay, MD

Average temperature in September - Selby-on-the-Bay, MD
  • Average high temperature in September: 77°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (40.3°F).

  • Average low temperature in September: 64.6°F

The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).

[Resources]

Average pressure in September
Selby-on-the-Bay, MD

Average pressure in September - Selby-on-the-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).

[Resources]

Average wind speed in September
Selby-on-the-Bay, MD

Average wind speed in September - Selby-on-the-Bay, MD
  • Average wind speed in September: 7.6mph

The windiest month (with the highest average wind speed) is January (10mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

[Resources]

Average humidity in September
Selby-on-the-Bay, MD

Average humidity in September - Selby-on-the-Bay, MD
  • Average humidity in September: 75%

The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, March, April and November (72%).

[Resources]

Average rainfall in September
Selby-on-the-Bay, MD

Average rainfall in September - Selby-on-the-Bay, MD
  • Average rainfall in September: 0.63"

The wettest month (with the highest rainfall) is August (1.69").
The driest month (with the least rainfall) is January (0.47").

[Resources]

Average rainfall days in September
Selby-on-the-Bay, MD

Average rainfall days in September - Selby-on-the-Bay, MD
  • Average rainfall days in September: 10.5 days

The months with the highest number of rainy days are July and August (14.3 days).
The month with the least rainy days is November (5.3 days).

[Resources]

Average snowfall in September
Selby-on-the-Bay, MD

Average snowfall in September - Selby-on-the-Bay, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.67").
The months with the least snowfall are April, May, June, July, August, September and October (0").

[Resources]

Average snowfall days in September
Selby-on-the-Bay, MD

Average snowfall days in September - Selby-on-the-Bay, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

[Resources]

Average sea temperature in September
Selby-on-the-Bay, MD

Average sea temperature in September - Selby-on-the-Bay, MD
  • Average sea temperature in September: 74.2°F

The best month for swimming (with the highest average sea temperature) is August (78°F).
The coldest month (with the lowest average sea temperature) is February (45.9°F).

[Resources]

Average daylight in September /
Average sunshine in September
Selby-on-the-Bay, MD

Average daylight in September / Average sunshine in September - Selby-on-the-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 1min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

[Resources]

Average sunshine days in September
Selby-on-the-Bay, MD

Average sunshine days in September - Selby-on-the-Bay, MD
  • Average sunshine days in September: 17.4 days

The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is August (13.8 days).

[Resources]

Average UV index in September
Selby-on-the-Bay, MD

Average UV index in September - Selby-on-the-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, February and December (UV index 2).

[Resources]

Average cloud cover in September
Selby-on-the-Bay, MD

Average cloud cover in September - Selby-on-the-Bay, MD
  • Average cloud cover in September: 33

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

[Resources]

Average visibility in September
Selby-on-the-Bay, MD

Average visibility in September - Selby-on-the-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).

[Resources]

Selby-on-the-Bay, Maryland, USA

Weather forecast for today
Weather forecast for tomorrow
10 days weather forecast
Climate data
1January
2February
3March
4April
5May
6June
7July
8August
9September
10October
11November
12December

Weather forecast for your location

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