September weather forecast
Arundel Hills, MD

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Weather in September

September, the first month of the autumn in Arundel Hills, is also a moderately hot month, with an average temperature varying between 77.2°F (25.1°C) and 62.2°F (16.8°C).

Temperature

September is characterized by a mild reduction in the average high-temperature, from a warm 83.8°F (28.8°C) in August to a still moderately hot 77.2°F (25.1°C). Throughout the nights in September, Arundel Hills experiences an average low-temperature of 62.2°F (16.8°C).

Humidity

The average relative humidity in September is 75%.

Rainfall

In September, the rain falls for 13.1 days. Throughout September, 2.09" (53mm) of precipitation is accumulated. In Arundel Hills, during the entire year, the rain falls for 156.3 days and collects up to 29.61" (752mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of the month, sunrise is at 6:35 am and sunset at 7:36 pm. On the last day of September, 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 unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index of 5 during September translates into these guidelines:
Exercise prevention - Precautions against solar damage are endorsed. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

Frequently asked questions

What is the usual temperature for Arundel Hills in September?

September temperatures vary between a high-temperature of 77.2°F (25.1°C) and a low-temperature of 62.2°F (16.8°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, is calculated to be 91.4°F (33°C).

What is the average humidity in September in Arundel Hills?

In September, the average relative humidity in Arundel Hills is 75%.

How much does it rain in September?

In September, the rain falls for 13.1 days. Throughout September, 2.09" (53mm) of precipitation is accumulated.

When it does not snow?

In Arundel Hills, Maryland, snow does not fall in April through October.

How many hours of daylight does Arundel Hills have 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 6:35 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 Arundel Hills, the average sunshine duration in September is 9.3h.

What is the UV index reading in September?

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 unprotected exposure to 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
Arundel Hills, MD

Average temperature in September - Arundel Hills, MD
  • Average high temperature in September: 77.2°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 (38.8°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 (27.3°F).

Average pressure in September
Arundel Hills, MD

Average pressure in September - Arundel Hills, 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
Arundel Hills, MD

Average wind speed in September - Arundel Hills, MD
  • Average wind speed in September: 6.5mph

The windiest months (with the highest average wind speed) are February and March (9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

Average humidity in September
Arundel Hills, MD

Average humidity in September - Arundel Hills, MD
  • Average humidity in September: 75%

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

Average rainfall in September
Arundel Hills, MD

Average rainfall in September - Arundel Hills, MD
  • Average rainfall in September: 2.09"

The wettest month (with the highest rainfall) is August (3.94").
The driest month (with the least rainfall) is January (1.77").

Average rainfall days in September
Arundel Hills, MD

Average rainfall days in September - Arundel Hills, MD
  • Average rainfall days in September: 13.1 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (8.6 days).

Average snowfall in September
Arundel Hills, MD

Average snowfall in September - Arundel Hills, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is January (2.24").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Arundel Hills, MD

Average snowfall days in September - Arundel Hills, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (3.9 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
Arundel Hills, MD

Average daylight in September / Average sunshine in September - Arundel Hills, 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
Arundel Hills, MD

Average sunshine days in September - Arundel Hills, MD
  • Average sunshine days in September: 14.7 days

The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is July (10.9 days).

Average UV index in September
Arundel Hills, MD

Average UV index in September - Arundel Hills, 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
Arundel Hills, MD

Average cloud cover in September - Arundel Hills, 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
Arundel Hills, MD

Average visibility in September - Arundel Hills, 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).

Arundel Hills, Maryland, USA

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