September weather forecast
Willowdale, MD

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Weather in September

September, the first month of the autumn in Willowdale, is also a moderately hot month, with an average temperature ranging between min 62.4°F (16.9°C) and max 77.2°F (25.1°C).

Temperature

A modest decline in the average high-temperature is seen during September, decreasing from 83.8°F (28.8°C) in August to a still warm 77.2°F (25.1°C). Willowdale's nights in September experience an average temperature drop to a comfortable 62.4°F (16.9°C).

Humidity

In September, the average relative humidity is 75%.

Rainfall

In September, the rain falls for 13.1 days. Throughout September, 2.2" (56mm) of precipitation is accumulated. Throughout the year, in Willowdale, there are 157.2 rainfall days, and 30.47" (774mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in September 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 7:02 am and sunset at 6:50 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 reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: A maximum daily UV index of 5 during September morphs into the following directions:
Act with care - The suggestion to avoid sunburn is emphasized. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Updated: Jun 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Willowdale in September?

During September, Willowdale experiences an average high-temperature of 77.2°F (25.1°C) and a low-temperature of 62.4°F (16.9°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, in August is evaluated at 91.4°F (33°C).

What is the average humidity in September?

In September, the average relative humidity is 75%.

How much does it rain in September?

In Willowdale, in September, during 13.1 rainfall days, 2.2" (56mm) of precipitation is typically accumulated.

When it does not snow?

In Willowdale, snow does not fall in April through October.

How many hours of daylight does Willowdale have in September?

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 6:35 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:50 pm EDT.

How long on average sun shines in September?

In September, the average sunshine duration in Willowdale is 9.3h.

What is the UV index intensity in September?

In Willowdale, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes 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
Willowdale, MD

Average temperature in September - Willowdale, MD
  • Average high temperature in September: 77.2°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in September: 62.4°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 (27.7°F).

Average pressure in September
Willowdale, MD

Average pressure in September - Willowdale, 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
Willowdale, MD

Average wind speed in September - Willowdale, MD
  • Average wind speed in September: 6.6mph

The windiest months (with the highest average wind speed) are January, February and March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

Average humidity in September
Willowdale, MD

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

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

Average rainfall in September
Willowdale, MD

Average rainfall in September - Willowdale, MD
  • Average rainfall in September: 2.2"

The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is January (1.81").

Average rainfall days in September
Willowdale, MD

Average rainfall days in September - Willowdale, MD
  • Average rainfall days in September: 13.1 days

The month with the highest number of rainy days is May (18 days).
The months with the least rainy days are January and November (8.4 days).

Average snowfall in September
Willowdale, MD

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

The month with the highest snowfall is January (2.09").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Willowdale, MD

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

The month with the highest number of snowfall days is January (3.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Willowdale, 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
Willowdale, MD

Average sunshine days in September - Willowdale, MD
  • Average sunshine days in September: 14.9 days

The month with the most sunshine days is November (19.9 days).
The months with the least sunshine days are May and July (10.8 days).

Average UV index in September
Willowdale, MD

Average UV index in September - Willowdale, 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
Willowdale, MD

Average cloud cover in September - Willowdale, 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
Willowdale, MD

Average visibility in September - Willowdale, 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).

Willowdale, Maryland, USA

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