September weather forecast
Persimmon Hills, MD

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Persimmon Hills, Maryland, with an average temperature ranging between max 76.6°F (24.8°C) and min 65.1°F (18.4°C).

Temperature

A moderate decline in average high-temperatures is noted in September, moving from a moderately hot 82.9°F (28.3°C) in August to a still warm 76.6°F (24.8°C). The nights of September anticipate an average low-temperature of 65.1°F (18.4°C).

Humidity

The average relative humidity in September in Persimmon Hills is 76%.

Rainfall

In Persimmon Hills, during September, the rain falls for 12.3 days and regularly aggregates up to 1.06" (27mm) of precipitation. Throughout the year, there are 132.3 rainfall days, and 15.83" (402mm) of precipitation is accumulated.

Snowfall

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

Daylight

In Persimmon Hills, Maryland, the average length of the day in September is 12h and 26min.
On the first day of September, sunrise is at 6:36 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

The average sunshine in September is 9.2h.

UV index

In Persimmon Hills, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 5 in September translates into these instructions:
Prioritize safety - Recommendations to avert sunburn are shared. Around midday, solar radiation is most harmful; hence, exposure should be limited. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.

Frequently asked questions

What are September temperatures?

September temperatures vary between a high-temperature of 76.6°F (24.8°C) and a low-temperature of 65.1°F (18.4°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in August is appraised at 89.6°F (32°C).

What is the average humidity in September in Persimmon Hills?

The average relative humidity in September is 76%.

How much does it rain in September?

In Persimmon Hills, Maryland, in September, during 12.3 rainfall days, 1.06" (27mm) of precipitation is typically accumulated.

When it does not snow?

April through October are months without snowfall.

What is the average length of the day in September?

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

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 6:36 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 Persimmon Hills, the average sunshine duration in September is 9.2h.

What is the UV index intensity in September?

In Persimmon Hills, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability 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
Persimmon Hills, MD

Average temperature in September - Persimmon Hills, MD
  • Average high temperature in September: 76.6°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (40.6°F).

  • Average low temperature in September: 65.1°F

The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).

Average pressure in September
Persimmon Hills, MD

Average pressure in September - Persimmon Hills, MD
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in September
Persimmon Hills, MD

Average wind speed in September - Persimmon Hills, MD
  • Average wind speed in September: 7.7mph

The windiest months (with the highest average wind speed) are January and March (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

Average humidity in September
Persimmon Hills, MD

Average humidity in September - Persimmon Hills, MD
  • Average humidity in September: 76%

The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January and November (72%).

Average rainfall in September
Persimmon Hills, MD

Average rainfall in September - Persimmon Hills, MD
  • Average rainfall in September: 1.06"

The wettest month (with the highest rainfall) is August (2.4").
The driest month (with the least rainfall) is January (0.67").

Average rainfall days in September
Persimmon Hills, MD

Average rainfall days in September - Persimmon Hills, MD
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is November (6.6 days).

Average snowfall in September
Persimmon Hills, MD

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

The month with the highest snowfall is January (0.75").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Persimmon Hills, MD

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

The month with the highest number of snowfall days is January (2.9 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
Persimmon Hills, MD

Average daylight in September / Average sunshine in September - Persimmon Hills, MD
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 48min).
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
Persimmon Hills, MD

Average sunshine days in September - Persimmon Hills, MD
  • Average sunshine days in September: 16.3 days

The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is August (13.7 days).

Average UV index in September
Persimmon Hills, MD

Average UV index in September - Persimmon 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 and December (UV index 2).

Average cloud cover in September
Persimmon Hills, MD

Average cloud cover in September - Persimmon Hills, MD
  • Average cloud cover in September: 33

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 27).

Average visibility in September
Persimmon Hills, MD

Average visibility in September - Persimmon 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).

Persimmon Hills, Maryland, USA

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