September weather forecast
Lewisdale, MD

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Weather in September

The first month of the autumn, September, is still a warm month in Lewisdale, Maryland, with temperature in the range of an average low of 61.7°F (16.5°C) and an average high of 78.4°F (25.8°C).

Temperature

September brings a slight decrease in temperature, down from 85.6°F (29.8°C) in August to a still warm 78.4°F (25.8°C). During the month of September, the nighttime temperature falls to an average of 61.7°F (16.5°C).

Humidity

The average relative humidity in September is 73%.

Rainfall

In September, in Lewisdale, the rain falls for 12.4 days. Throughout September, 2.2" (56mm) of precipitation is accumulated. Throughout the year, there are 154.8 rainfall days, and 30.28" (769mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall.

Daylight

In Lewisdale, 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 7:03 am and sunset at 6:51 pm EDT.

Sunshine

The average sunshine in September is 8.7h.

UV index

In Lewisdale, 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 the average person.
Note: The daily high UV index of 5 in September translates into this advice:
Be vigilant - A duty to shield skin and eyes from injury exists. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Updated: Jun 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

An average high-temperature, in September, in Lewisdale, is 78.4°F (25.8°C) and the average low-temperature is 61.7°F (16.5°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, in August is computed to be 95°F (35°C).

What is the average humidity in September?

In Lewisdale, Maryland, the average relative humidity in September is 73%.

How many days does it rain in September?

In Lewisdale, during September, the rain falls for 12.4 days and regularly aggregates up to 2.2" (56mm) of precipitation.

When it does not snow?

May through October are months without snowfall.

What is the average length of the day in September?

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

When are sunrise and 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 7:03 am and sunset at 6:51 pm EDT.

How long on average sun shines in September?

In Lewisdale, the average sunshine duration in September is 8.7h.

How high is the UV index in September?

In Lewisdale, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health 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
Lewisdale, MD

Average temperature in September - Lewisdale, MD
  • Average high temperature in September: 78.4°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.7°F).

  • Average low temperature in September: 61.7°F

The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (27.1°F).

Average pressure in September
Lewisdale, MD

Average pressure in September - Lewisdale, 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 (29.95"Hg).

Average wind speed in September
Lewisdale, MD

Average wind speed in September - Lewisdale, MD
  • Average wind speed in September: 5.8mph

The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in September
Lewisdale, MD

Average humidity in September - Lewisdale, MD
  • Average humidity in September: 73%

The months with the highest relative humidity are May, October and December (75%).
The month with the lowest relative humidity is July (69%).

Average rainfall in September
Lewisdale, MD

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

The wettest month (with the highest rainfall) is August (3.86").
The driest month (with the least rainfall) is January (1.89").

Average rainfall days in September
Lewisdale, MD

Average rainfall days in September - Lewisdale, MD
  • Average rainfall days in September: 12.4 days

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is November (8.5 days).

Average snowfall in September
Lewisdale, MD

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

The month with the highest snowfall is January (2.87").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Lewisdale, MD

Average snowfall days in September - Lewisdale, 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
Lewisdale, MD

Average daylight in September / Average sunshine in September - Lewisdale, 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: 8h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

Average sunshine days in September
Lewisdale, MD

Average sunshine days in September - Lewisdale, MD
  • Average sunshine days in September: 16.1 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (12 days).

Average UV index in September
Lewisdale, MD

Average UV index in September - Lewisdale, 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
Lewisdale, MD

Average cloud cover in September - Lewisdale, MD
  • Average cloud cover in September: 38

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in September
Lewisdale, MD

Average visibility in September - Lewisdale, MD
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

Lewisdale, Maryland, USA

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