September weather forecast
Montgomery Run, MD

Share

Weather in September

September, the first month of the autumn in Montgomery Run, is also a moderately hot month, with an average temperature ranging between max 77°F (25°C) and min 60.6°F (15.9°C).

Temperature

With the beginning of September, the average high-temperature shows a small decrease, transitioning from a warm 83.8°F (28.8°C) in August to a still moderately hot 77°F (25°C). Throughout September, an average nighttime temperature of 60.6°F (15.9°C) is experienced in Montgomery Run.

Humidity

The average relative humidity in September is 75%.

Rainfall

In September, the rain falls for 13.3 days. Throughout September, 2.17" (55mm) of precipitation is accumulated. Throughout the year, there are 159.3 rainfall days, and 30.31" (770mm) of precipitation is accumulated.

Snowfall

In Montgomery Run, snow does not fall in April through October.

Daylight

The average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:36 am and sunset at 7:37 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:50 pm EDT.

Sunshine

In Montgomery Run, Maryland, the average sunshine in September is 9.1h.

UV index

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 5 during September translates into the following directions:
Undertake precautions - It is suggested to shield oneself from sunburn. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.

Frequently asked questions

What is the temperature in September?

In September, in Montgomery Run, the average high-temperature is 77°F (25°C), and the average low-temperature is 60.6°F (15.9°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, in August is calculated to be 91.4°F (33°C).

What is the average humidity in September?

In September, the average relative humidity is 75%.

How many days does it rain in September?

In Montgomery Run, Maryland, in September, during 13.3 rainfall days, 2.17" (55mm) of precipitation is typically accumulated.

When it does not snow?

In Montgomery Run, snow does not fall in April through October.

How many hours of daylight does Montgomery Run have in September?

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

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:36 am and sunset at 7:37 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 Montgomery Run have in September?

In Montgomery Run, Maryland, the average sunshine duration in September is 9.1h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health 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
Montgomery Run, MD

Average temperature in September - Montgomery Run, MD
  • Average high temperature in September: 77°F

The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (38.1°F).

  • Average low temperature in September: 60.6°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

Average pressure in September
Montgomery Run, MD

Average pressure in September - Montgomery Run, 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
Montgomery Run, MD

Average wind speed in September - Montgomery Run, MD
  • Average wind speed in September: 6.1mph

The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity in September
Montgomery Run, MD

Average humidity in September - Montgomery Run, MD
  • Average humidity in September: 75%

The months with the highest relative humidity are May and October (77%).
The months with the lowest relative humidity are April and July (72%).

Average rainfall in September
Montgomery Run, MD

Average rainfall in September - Montgomery Run, MD
  • Average rainfall in September: 2.17"

The wettest month (with the highest rainfall) is August (4.06").
The driest month (with the least rainfall) is January (1.85").

Average rainfall days in September
Montgomery Run, MD

Average rainfall days in September - Montgomery Run, MD
  • Average rainfall days in September: 13.3 days

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

Average snowfall in September
Montgomery Run, MD

Average snowfall in September - Montgomery Run, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is March (3.03").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Montgomery Run, MD

Average snowfall days in September - Montgomery Run, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (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
Montgomery Run, MD

Average daylight in September / Average sunshine in September - Montgomery Run, 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 months with the least sunshine are January and February (Average sunshine: 5h and 6min).

Average sunshine days in September
Montgomery Run, MD

Average sunshine days in September - Montgomery Run, MD
  • Average sunshine days in September: 14.3 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (11 days).

Average UV index in September
Montgomery Run, MD

Average UV index in September - Montgomery Run, 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, November and December (UV index 2).

Average cloud cover in September
Montgomery Run, MD

Average cloud cover in September - Montgomery Run, MD
  • Average cloud cover in September: 35

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).

Average visibility in September
Montgomery Run, MD

Average visibility in September - Montgomery Run, 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).

Montgomery Run, Maryland, USA

Weather forecast for your location

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