September weather forecast
Severndale, MD

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Weather in September

September, the first month of the autumn in Severndale, is also a moderately hot month, with an average temperature ranging between min 63.3°F (17.4°C) and max 77.4°F (25.2°C).

Temperature

Severndale in September experiences a gentle temperature dip, with average high-temperatures reducing from 83.7°F (28.7°C) in August to a still warm 77.4°F (25.2°C). During the nights in September, Severndale observes an average low-temperature of 63.3°F (17.4°C).

Humidity

The average relative humidity in September is 75%.

Rainfall

September is the month with the least rainfall. Rain falls for 11.8 days and accumulates 1.89" (48mm) of precipitation.

Snowfall

In Severndale, snow does not fall in May through October.

Daylight

In Severndale, the average length of the day in September is 12h and 26min.
On the first day of September in Severndale, Maryland, 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

In September, the average sunshine is 9.2h.

UV index

In September, the average daily maximum UV index in Severndale is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In September, a daily UV index of 5 turns into the following recommendations:
Ensure safety - Recommendations to avert sunburn are presented. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Updated: Jun 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Severndale in September?

In Severndale, 77.4°F (25.2°C) is the average high-temperature and 63.3°F (17.4°C) is the average low-temperature during September. In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is computed to be 91.4°F (33°C).

What is the average humidity in September?

In September, the average relative humidity is 75%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 11.8 days and typically collects 1.89" (48mm) of precipitation.

How many days does it rain in September?

In Severndale, during September, the rain falls for 11.8 days and regularly aggregates up to 1.89" (48mm) of precipitation.

When it does not snow?

In Severndale, snow does not fall in May through October.

How many hours of daylight does Severndale have in September?

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

When are sunrise and sunset in September?

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 7:02 am and sunset at 6:50 pm EDT.

How many hours of sunshine does Severndale have in September?

In Severndale, the average sunshine duration in September is 9.2h.

What is the UV index reading in September?

In September, the average daily maximum UV index 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
Severndale, MD

Average temperature in September - Severndale, MD
  • Average high temperature in September: 77.4°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (39.6°F).

  • Average low temperature in September: 63.3°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).

Average pressure in September
Severndale, MD

Average pressure in September - Severndale, 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
Severndale, MD

Average wind speed in September - Severndale, MD
  • Average wind speed in September: 7mph

The windiest month (with the highest average wind speed) is March (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

Average humidity in September
Severndale, MD

Average humidity in September - Severndale, 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%).

Average rainfall in September
Severndale, MD

Average rainfall in September - Severndale, MD
  • Average rainfall in September: 1.89"

The wettest month (with the highest rainfall) is August (3.54").
The driest month (with the least rainfall) is September (1.89").

Average rainfall days in September
Severndale, MD

Average rainfall days in September - Severndale, MD
  • Average rainfall days in September: 11.8 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is November (9.4 days).

Average snowfall in September
Severndale, MD

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

The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Severndale, MD

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

The month with the highest number of snowfall days is January (4.4 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
Severndale, MD

Average daylight in September / Average sunshine in September - Severndale, 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 54min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

Average sunshine days in September
Severndale, MD

Average sunshine days in September - Severndale, MD
  • Average sunshine days in September: 16.4 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is May (10.8 days).

Average UV index in September
Severndale, MD

Average UV index in September - Severndale, 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
Severndale, MD

Average cloud cover in September - Severndale, MD
  • Average cloud cover in September: 34

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).

Average visibility in September
Severndale, MD

Average visibility in September - Severndale, 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).

Severndale, Maryland, USA

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