September weather forecast
Cromwell Fountain, MD

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Weather in September

The first month of the autumn, September, is still a warm month in Cromwell Fountain, Maryland, with an average temperature fluctuating between 77.2°F (25.1°C) and 62.4°F (16.9°C).

Temperature

The transition into September involves a small decrease in the average high-temperature, dipping slightly from a moderately hot 83.8°F (28.8°C) in August to a still warm 77.2°F (25.1°C). In Cromwell Fountain, the September nights cool down to an average low of 62.4°F (16.9°C).

Humidity

In September, the average relative humidity is 75%.

Rainfall

In Cromwell Fountain, during September, the rain falls for 13.1 days and regularly aggregates up to 2.2" (56mm) of precipitation. Throughout the year, there are 157.2 rainfall days, and 30.47" (774mm) of precipitation is accumulated.

Snowfall

In Cromwell Fountain, snow does not fall in April through October.

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of the month, sunrise is at 6:35 am and sunset at 7:36 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:50 pm EDT.

Sunshine

In September, the average sunshine is 9.3h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: In September, the maximum UV index of 5 suggests these recommendations:
Be vigilant - Preventing sunburn is recommended. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

Frequently asked questions

What is the temperature in September?

In September, in Cromwell Fountain, the average high-temperature is 77.2°F (25.1°C), and the average low-temperature is 62.4°F (16.9°C). In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, is evaluated at 91.4°F (33°C).

What is the average humidity in September?

In Cromwell Fountain, the average relative humidity in September is 75%.

How much does it rain in Cromwell Fountain in September?

In Cromwell Fountain, during September, the rain falls for 13.1 days and regularly aggregates up to 2.2" (56mm) of precipitation.

When it does not snow?

April through October are months without snowfall.

How many hours of daylight does Cromwell Fountain have in September?

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

What time are sunrise and sunset in September?

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.

How long on average sun shines in September?

In Cromwell Fountain, the average sunshine duration in September is 9.3h.

How high is the UV index in September?

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat 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
Cromwell Fountain, MD

Average temperature in September - Cromwell Fountain, MD
  • Average high temperature in September: 77.2°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in September: 62.4°F

The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).

Average pressure in September
Cromwell Fountain, MD

Average pressure in September - Cromwell Fountain, 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
Cromwell Fountain, MD

Average wind speed in September - Cromwell Fountain, MD
  • Average wind speed in September: 6.6mph

The windiest months (with the highest average wind speed) are January, February and March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

Average humidity in September
Cromwell Fountain, MD

Average humidity in September - Cromwell Fountain, MD
  • Average humidity in September: 75%

The month with the highest relative humidity is May (77%).
The months with the lowest relative humidity are March, April and July (72%).

Average rainfall in September
Cromwell Fountain, MD

Average rainfall in September - Cromwell Fountain, MD
  • Average rainfall in September: 2.2"

The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is January (1.81").

Average rainfall days in September
Cromwell Fountain, MD

Average rainfall days in September - Cromwell Fountain, MD
  • Average rainfall days in September: 13.1 days

The month with the highest number of rainy days is May (18 days).
The months with the least rainy days are January and November (8.4 days).

Average snowfall in September
Cromwell Fountain, MD

Average snowfall in September - Cromwell Fountain, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is January (2.09").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Cromwell Fountain, MD

Average snowfall days in September - Cromwell Fountain, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (3.8 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
Cromwell Fountain, MD

Average daylight in September / Average sunshine in September - Cromwell Fountain, 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
Cromwell Fountain, MD

Average sunshine days in September - Cromwell Fountain, MD
  • Average sunshine days in September: 14.9 days

The month with the most sunshine days is November (19.9 days).
The months with the least sunshine days are May and July (10.8 days).

Average UV index in September
Cromwell Fountain, MD

Average UV index in September - Cromwell Fountain, 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, November and December (UV index 2).

Average cloud cover in September
Cromwell Fountain, MD

Average cloud cover in September - Cromwell Fountain, 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
Cromwell Fountain, MD

Average visibility in September - Cromwell Fountain, 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).

Cromwell Fountain, Maryland, USA

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