September weather forecast
Gerber Knoll, MD

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Weather in September

September, the first month of the autumn in Gerber Knoll, is still a warm month, with an average temperature fluctuating between 75.9°F (24.4°C) and 58.6°F (14.8°C).

Temperature

The arrival of September suggests a slight decrease in the average high-temperature, moving from 82.6°F (28.1°C) in August to a still moderately hot 75.9°F (24.4°C). Gerber Knoll records an average temperature drop to a mild 58.6°F (14.8°C) in September.

Humidity

In Gerber Knoll, the average relative humidity in September is 78%.

Rainfall

In Gerber Knoll, in September, it is raining for 11.4 days, with typically 1.14" (29mm) of accumulated precipitation. Throughout the year, there are 130.3 rainfall days, and 15.47" (393mm) of precipitation is accumulated.

Snowfall

In Gerber Knoll, snow does not fall in May through October.

Daylight

The average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:37 am and sunset at 7:38 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:51 pm EDT.

Sunshine

In Gerber Knoll, the average sunshine in September is 8.8h.

UV index

In September, the average daily maximum UV index in Gerber Knoll is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures?

Gerber Knoll in September has an average high-temperature of 75.9°F (24.4°C) and an average low-temperature of 58.6°F (14.8°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in August is evaluated at 89.6°F (32°C).

What is the average humidity in September?

The average relative humidity in September is 78%.

How much does it rain in September?

In Gerber Knoll, during September, the rain falls for 11.4 days and regularly aggregates up to 1.14" (29mm) of precipitation.

When it does not snow in Gerber Knoll?

May through October are months without snowfall.

What is the average length of the day in September?

The average day length in September is 12h and 26min.

What time 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 7:03 am and sunset at 6:51 pm EDT.

How many hours of sunshine does Gerber Knoll have in September?

In Gerber Knoll, Maryland, the average sunshine duration in September is 8.8h.

How high is the UV index in September in Gerber Knoll?

The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health 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
Gerber Knoll, MD

Average temperature in September - Gerber Knoll, MD
  • Average high temperature in September: 75.9°F

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (37.6°F).

  • Average low temperature in September: 58.6°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (25°F).

Average pressure in September
Gerber Knoll, MD

Average pressure in September - Gerber Knoll, 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 (29.94"Hg).

Average wind speed in September
Gerber Knoll, MD

Average wind speed in September - Gerber Knoll, MD
  • Average wind speed in September: 5.9mph

The windiest month (with the highest average wind speed) is March (8.7mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in September
Gerber Knoll, MD

Average humidity in September - Gerber Knoll, MD
  • Average humidity in September: 78%

The month with the highest relative humidity is May (80%).
The months with the lowest relative humidity are January, April, July and November (75%).

Average rainfall in September
Gerber Knoll, MD

Average rainfall in September - Gerber Knoll, MD
  • Average rainfall in September: 1.14"

The wettest month (with the highest rainfall) is August (2.48").
The driest month (with the least rainfall) is February (0.79").

Average rainfall days in September
Gerber Knoll, MD

Average rainfall days in September - Gerber Knoll, MD
  • Average rainfall days in September: 11.4 days

The month with the highest number of rainy days is August (15.1 days).
The months with the least rainy days are January and February (6.8 days).

Average snowfall in September
Gerber Knoll, MD

Average snowfall in September - Gerber Knoll, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is January (1.34").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Gerber Knoll, MD

Average snowfall days in September - Gerber Knoll, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (4.9 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
Gerber Knoll, MD

Average daylight in September / Average sunshine in September - Gerber Knoll, 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: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in September
Gerber Knoll, MD

Average sunshine days in September - Gerber Knoll, MD
  • Average sunshine days in September: 16.6 days

The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is May (12.9 days).

Average UV index in September
Gerber Knoll, MD

Average UV index in September - Gerber Knoll, MD
  • Average UV index in September: 4

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
Gerber Knoll, MD

Average cloud cover in September - Gerber Knoll, MD
  • Average cloud cover in September: 38

The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in September
Gerber Knoll, MD

Average visibility in September - Gerber Knoll, 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).

Gerber Knoll, Maryland, USA

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