September weather forecast
Blackrock Hills, MD

Share

Weather in September

September, the first month of the autumn in Blackrock Hills, is also a moderately hot month, with an average temperature varying between 77.5°F (25.3°C) and 59.2°F (15.1°C).

Temperature

Blackrock Hills experiences a moderate temperature shift at the start of September, with average high-temperatures adjusting a bit from 84.6°F (29.2°C) in August to a still warm 77.5°F (25.3°C). In the month of September, the temperature generally rests at an average low of 59.2°F (15.1°C).

Humidity

In September, the average relative humidity is 76%.

Rainfall

In September, the rain falls for 14.2 days. Throughout September, 2.17" (55mm) of precipitation is accumulated. Throughout the year, there are 159.4 rainfall days, and 30.71" (780mm) of precipitation is accumulated.

Snowfall

June through October are months without snowfall in Blackrock Hills.

Daylight

The average length of the day in September is 12h and 26min.
On the first day of September, sunrise is at 6:38 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:52 pm EDT.

Sunshine

In September, the average sunshine is 9h.

UV index

In Blackrock Hills, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: An average UV index of 5 in September transforms into this advice:
Take precautions - Protection against sun damage is advised. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Updated: Aug 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

An average high-temperature, in September, in Blackrock Hills, is 77.5°F (25.3°C) and the average low-temperature is 59.2°F (15.1°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, is appraised at 93.2°F (34°C).

What is the average humidity in September?

In Blackrock Hills, Maryland, the average relative humidity in September is 76%.

How many days does it rain in September in Blackrock Hills?

In Blackrock Hills, in September, during 14.2 rainfall days, 2.17" (55mm) of precipitation is typically accumulated.

When it does not snow?

June through October are months without snowfall.

How many hours of daylight does Blackrock Hills have in September?

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

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:38 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:52 pm EDT.

How long on average sun shines in September in Blackrock Hills?

In September, the average sunshine duration is 9h.

What is the UV index reading in September?

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health risk 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
Blackrock Hills, MD

Average temperature in September - Blackrock Hills, MD
  • Average high temperature in September: 77.5°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in September: 59.2°F

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).

Average pressure in September
Blackrock Hills, MD

Average pressure in September - Blackrock Hills, MD
  • Average pressure in September: 30.06"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in September
Blackrock Hills, MD

Average wind speed in September - Blackrock Hills, MD
  • Average wind speed in September: 5.4mph

The windiest month (with the highest average wind speed) is March (7.8mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).

Average humidity in September
Blackrock Hills, MD

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

The months with the highest relative humidity are October and December (78%).
The month with the lowest relative humidity is July (72%).

Average rainfall in September
Blackrock Hills, MD

Average rainfall in September - Blackrock Hills, MD
  • Average rainfall in September: 2.17"

The wettest month (with the highest rainfall) is August (3.78").
The driest months (with the least rainfall) are January and February (1.97").

Average rainfall days in September
Blackrock Hills, MD

Average rainfall days in September - Blackrock Hills, MD
  • Average rainfall days in September: 14.2 days

The month with the highest number of rainy days is May (17.5 days).
The months with the least rainy days are January and November (9.5 days).

Average snowfall in September
Blackrock Hills, MD

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

The month with the highest snowfall is March (2.83").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in September
Blackrock Hills, MD

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

The months with the highest number of snowfall days are January and February (5.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Blackrock Hills, MD

Average daylight in September / Average sunshine in September - Blackrock 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 0min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).

Average sunshine days in September
Blackrock Hills, MD

Average sunshine days in September - Blackrock Hills, MD
  • Average sunshine days in September: 14.1 days

The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (11.3 days).

Average UV index in September
Blackrock Hills, MD

Average UV index in September - Blackrock 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
Blackrock Hills, MD

Average cloud cover in September - Blackrock Hills, MD
  • Average cloud cover in September: 37

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).

Average visibility in September
Blackrock Hills, MD

Average visibility in September - Blackrock Hills, MD
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

Blackrock Hills, Maryland, USA

Weather forecast for your location

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