September weather forecast
Patapsco Park, MD

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Weather in September

The first month of the autumn, September, is still a warm month in Patapsco Park, Maryland, with an average temperature ranging between max 77.2°F (25.1°C) and min 62.2°F (16.8°C).

Temperature

In September, the average high-temperature marginally drops from a moderately hot 83.8°F (28.8°C) in August to a still warm 77.2°F (25.1°C). Patapsco Park's temperature in September lowers to a consistent average of 62.2°F (16.8°C) during the nights.

Humidity

In Patapsco Park, 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. Throughout the year, there are 156.3 rainfall days, and 29.61" (752mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

In September, the average length of the day in Patapsco Park is 12h and 26min.
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.

Sunshine

In Patapsco Park, 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 medium health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In September, a daily UV index of 5 turns into the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Updated: Aug 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

In Patapsco Park, 77.2°F (25.1°C) is the average high-temperature and 62.2°F (16.8°C) is the average low-temperature during September. The average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is evaluated at 91.4°F (33°C).

What is the average humidity in September?

In Patapsco Park, the average relative humidity in September is 75%.

How many days 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 Patapsco Park, snow does not fall in April through October.

How many hours of daylight does Patapsco Park have in September?

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 long on average sun shines in September?

In September, the average sunshine duration is 9.3h.

What is the UV index intensity in September in Patapsco Park?

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health risk from exposure to the Sun's 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
Patapsco Park, MD

Average temperature in September - Patapsco Park, 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
Patapsco Park, MD

Average pressure in September - Patapsco Park, 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
Patapsco Park, MD

Average wind speed in September - Patapsco Park, 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
Patapsco Park, MD

Average humidity in September - Patapsco Park, 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
Patapsco Park, MD

Average rainfall in September - Patapsco Park, 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
Patapsco Park, MD

Average rainfall days in September - Patapsco Park, 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
Patapsco Park, MD

Average snowfall in September - Patapsco Park, 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
Patapsco Park, MD

Average snowfall days in September - Patapsco Park, 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
Patapsco Park, MD

Average daylight in September / Average sunshine in September - Patapsco Park, 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
Patapsco Park, MD

Average sunshine days in September - Patapsco Park, 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
Patapsco Park, MD

Average UV index in September - Patapsco Park, 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
Patapsco Park, MD

Average cloud cover in September - Patapsco Park, 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
Patapsco Park, MD

Average visibility in September - Patapsco Park, 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).

Patapsco Park, Maryland, USA

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