September weather forecast
Londontowne, MD

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Weather in September

September, the first month of the autumn in Londontowne, is also a moderately hot month, with an average temperature fluctuating between 77°F (25°C) and 64.6°F (18.1°C).

Temperature

September witnesses a gentle descent in average high-temperature, descending from August's moderately hot 83.3°F (28.5°C) to a still warm 77°F (25°C). Londontowne, during the nights of September, experiences an average temperature drop to a refreshing 64.6°F (18.1°C).

Humidity

The average relative humidity in September in Londontowne, Maryland, is 75%.

Rainfall

In Londontowne, in September, it is raining for 10.5 days, with typically 0.63" (16mm) of accumulated precipitation. In Londontowne, during the entire year, the rain falls for 120.4 days and collects up to 10.47" (266mm) of precipitation.

Snowfall

April through October are months without snowfall in Londontowne.

Ocean temperature

In Londontowne, in September, the average water temperature is 74.1°F (23.4°C).
Note: While a person's sensitivity to cold is personal, factors like sunshine, wind, and the temperature can influence their comfort in 74.1°F (23.4°C) waters. Olympians, for perspective, swim in waters between 77°F (25°C) and 82.4°F (28°C).

Daylight

The average length of the day in September in Londontowne is 12h and 26min.
On the first day of September, 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 6:50 pm EDT.

Sunshine

In September, the average sunshine in Londontowne is 9.2h.

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 in September converts into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. To protect against the Sun's most potent rays, avoid direct exposure around midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Caution! The reflection of sand and water significantly amplifies the Sun's UV radiation.
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Frequently asked questions

What are the temperatures in Londontowne in September?

An average high-temperature, in September, in Londontowne, is 77°F (25°C) and the average low-temperature is 64.6°F (18.1°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in August is computed to be 89.6°F (32°C).

What is the average humidity in September in Londontowne?

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

How much does it rain in Londontowne in September?

In September, in Londontowne, the rain falls for 10.5 days. Throughout September, 0.63" (16mm) of precipitation is accumulated.

When it does not snow in Londontowne?

April through October are months without snowfall in Londontowne, Maryland.

What is the water temperature in September in Londontowne?

In September, the average ocean temperature in Londontowne is 74.1°F (23.4°C). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 74.1°F (23.4°C) water.

What is the average length of the day in September in Londontowne?

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

When is the sunrise / sunset in September in Londontowne?

On the first day of September in Londontowne, 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 6:50 pm EDT.

How many hours of sunshine does Londontowne have in September?

The average sunshine duration in September is 9.2h.

How high is the UV index in September in Londontowne?

In Londontowne, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to 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
Londontowne, MD

Average temperature in September - Londontowne, 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).

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Average pressure in September
Londontowne, MD

Average pressure in September - Londontowne, 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).

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Average wind speed in September
Londontowne, MD

Average wind speed in September - Londontowne, 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).

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Average humidity in September
Londontowne, MD

Average humidity in September - Londontowne, 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%).

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Average rainfall in September
Londontowne, MD

Average rainfall in September - Londontowne, 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").

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Average rainfall days in September
Londontowne, MD

Average rainfall days in September - Londontowne, 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).

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Average snowfall in September
Londontowne, MD

Average snowfall in September - Londontowne, 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").

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Average snowfall days in September
Londontowne, MD

Average snowfall days in September - Londontowne, 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).

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Average sea temperature in September
Londontowne, MD

Average sea temperature in September - Londontowne, 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).

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

Average daylight in September / Average sunshine in September - Londontowne, 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).

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Average sunshine days in September
Londontowne, MD

Average sunshine days in September - Londontowne, 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).

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Average UV index in September
Londontowne, MD

Average UV index in September - Londontowne, 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).

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Average cloud cover in September
Londontowne, MD

Average cloud cover in September - Londontowne, 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).

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Average visibility in September
Londontowne, MD

Average visibility in September - Londontowne, 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).

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Londontowne, Maryland, USA

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