September weather forecast
New Carrollton, MD

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Weather in September

September brings the advent of the fall season in New Carrollton. However, the temperatures, while slightly reduced, retain some vestiges of the summer warmth. The weather starts taking on a cooler demeanor with the average highest temperature residing at 78.1°F (25.6°C). A continued shortening of daylight hours further pronounces the imminent seasonal shift. This period marks the onset of autumnal transformation that will become more apparent in the following month.

Temperature

New Carrollton's progression into September involves a minor drop in the average high-temperature, slightly receding from 85.1°F (29.5°C) in August to a still moderately hot 78.1°F (25.6°C). New Carrollton's nighttime temperature in September drops to an average of 62.2°F (16.8°C).

Humidity

In September, the average relative humidity in New Carrollton is 74%.

Rainfall

In New Carrollton, in September, during 12.3 rainfall days, 2.09" (53mm) of precipitation is typically accumulated. Throughout the year, in New Carrollton, there are 157.9 rainfall days, and 31.14" (791mm) of precipitation is accumulated.

Snowfall

May through November are months without snowfall.

Daylight

In New Carrollton, Maryland, 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, in New Carrollton, sunrise is at 7:03 am and sunset at 6:51 pm EDT.

Sunshine

In September, the average sunshine in New Carrollton is 9.1h.

UV index

In New Carrollton, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: An average UV index of 5 in September transforms into this advice:
Adopt protective measures - It is advised to guard against sun damage. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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Frequently asked questions

What are the temperatures in New Carrollton in September?

In September, in New Carrollton, the average high-temperature is 78.1°F (25.6°C), and the average low-temperature is 62.2°F (16.8°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is evaluated at 93.2°F (34°C).

What is the average humidity in September in New Carrollton?

In September, the average relative humidity is 74%.

How much does it rain in New Carrollton in September?

In New Carrollton, during September, the rain falls for 12.3 days and regularly aggregates up to 2.09" (53mm) of precipitation.

When it does not snow in New Carrollton?

In New Carrollton, snow does not fall in May through November.

How many hours of daylight does New Carrollton have in September?

The average day length in September in New Carrollton, Maryland, is 12h and 26min.

What time are sunrise and sunset in September in New Carrollton?

In September, on the first day of the month, sunrise is at 6:37 am and sunset at 7:37 pm. On the last day of the month, in New Carrollton, sunrise is at 7:03 am and sunset at 6:51 pm EDT.

How long on average sun shines in September in New Carrollton?

In September, the average sunshine duration in New Carrollton is 9.1h.

What is the UV index intensity in September in New Carrollton?

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from 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
New Carrollton, MD

Average temperature in September - New Carrollton, MD
  • Average high temperature in September: 78.1°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 (39.9°F).

  • Average low temperature in September: 62.2°F

The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).

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Average pressure in September
New Carrollton, MD

Average pressure in September - New Carrollton, 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).

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Average wind speed in September
New Carrollton, MD

Average wind speed in September - New Carrollton, MD
  • Average wind speed in September: 6.1mph

The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in September
New Carrollton, MD

Average humidity in September - New Carrollton, MD
  • Average humidity in September: 74%

The months with the highest relative humidity are May, October and December (76%).
The months with the lowest relative humidity are April and July (71%).

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Average rainfall in September
New Carrollton, MD

Average rainfall in September - New Carrollton, MD
  • Average rainfall in September: 2.09"

The wettest month (with the highest rainfall) is August (3.58").
The driest month (with the least rainfall) is January (2.01").

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Average rainfall days in September
New Carrollton, MD

Average rainfall days in September - New Carrollton, MD
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is November (9 days).

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Average snowfall in September
New Carrollton, MD

Average snowfall in September - New Carrollton, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is January (2.6").
The months with the least snowfall are May, June, July, August, September, October and November (0").

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Average snowfall days in September
New Carrollton, MD

Average snowfall days in September - New Carrollton, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
New Carrollton, MD

Average daylight in September / Average sunshine in September - New Carrollton, 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 0min).

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Average sunshine days in September
New Carrollton, MD

Average sunshine days in September - New Carrollton, MD
  • Average sunshine days in September: 15.6 days

The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (11.8 days).

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Average UV index in September
New Carrollton, MD

Average UV index in September - New Carrollton, 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 and December (UV index 2).

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Average cloud cover in September
New Carrollton, MD

Average cloud cover in September - New Carrollton, MD
  • Average cloud cover in September: 36

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

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Average visibility in September
New Carrollton, MD

Average visibility in September - New Carrollton, 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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New Carrollton, Maryland, USA

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