September weather forecast
Rockcrest, MD

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Rockcrest, Maryland, with an average temperature varying between 77.9°F (25.5°C) and 60.8°F (16°C).

Temperature

As Rockcrest, Maryland, enters September, the average high-temperature subtly lowers from the a moderately hot 85.3°F (29.6°C) of August to a still warm 77.9°F (25.5°C). During September, Rockcrest experiences a consistent low-temperature average of 60.8°F (16°C).

Humidity

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

Rainfall

In Rockcrest, in September, during 13.7 rainfall days, 2.2" (56mm) of precipitation is typically accumulated. Throughout the year, there are 156.4 rainfall days, and 30.79" (782mm) of precipitation is accumulated.

Snowfall

In Rockcrest, snow does not fall in May through October.

Daylight

In Rockcrest, the average length of the day in September is 12h and 26min.
On the first day of September, sunrise is at 6:37 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:52 pm EDT.

Sunshine

In Rockcrest, the average sunshine in September is 9h.

UV index

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: In September, the UV index of 5 transforms into the following advice:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.

Frequently asked questions

What is the temperature in September?

In September, the average high-temperature and low-temperature in Rockcrest are 77.9°F (25.5°C) and 60.8°F (16°C) respectively. In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is evaluated at 95°F (35°C).

What is the average humidity in September?

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

How much does it rain in September?

In Rockcrest, Maryland, during September, the rain falls for 13.7 days and regularly aggregates up to 2.2" (56mm) of precipitation.

When it does not snow in Rockcrest?

In Rockcrest, snow does not fall in May through October.

How many hours of daylight does Rockcrest 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 6:37 am and sunset at 7:38 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 September, the average sunshine duration is 9h.

How high is the UV index 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 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
Rockcrest, MD

Average temperature in September - Rockcrest, MD
  • Average high temperature in September: 77.9°F

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (39°F).

  • Average low temperature in September: 60.8°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).

Average pressure in September
Rockcrest, MD

Average pressure in September - Rockcrest, 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 (29.95"Hg).

Average wind speed in September
Rockcrest, MD

Average wind speed in September - Rockcrest, MD
  • Average wind speed in September: 5.6mph

The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity in September
Rockcrest, MD

Average humidity in September - Rockcrest, MD
  • Average humidity in September: 74%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (70%).

Average rainfall in September
Rockcrest, MD

Average rainfall in September - Rockcrest, MD
  • Average rainfall in September: 2.2"

The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is January (1.97").

Average rainfall days in September
Rockcrest, MD

Average rainfall days in September - Rockcrest, MD
  • Average rainfall days in September: 13.7 days

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is November (9.2 days).

Average snowfall in September
Rockcrest, MD

Average snowfall in September - Rockcrest, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is March (3.03").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Rockcrest, MD

Average snowfall days in September - Rockcrest, MD
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and February (5.3 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
Rockcrest, MD

Average daylight in September / Average sunshine in September - Rockcrest, 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 48min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 6min).

Average sunshine days in September
Rockcrest, MD

Average sunshine days in September - Rockcrest, MD
  • Average sunshine days in September: 14.9 days

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is July (12 days).

Average UV index in September
Rockcrest, MD

Average UV index in September - Rockcrest, 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
Rockcrest, MD

Average cloud cover in September - Rockcrest, 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
Rockcrest, MD

Average visibility in September - Rockcrest, 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).

Rockcrest, Maryland, USA

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