Baltimore
Maryland, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Baltimore, MD

A golden evening appearance of tall buildings in Baltimore, Maryland, with the clear sky
A golden evening appearance of tall buildings in Baltimore, Maryland, with the clear sky
Baltimore experiences a further drop in the temperature in September as the mercury shrinks to the range of 63.9°F (17.7°C) and 80.2°F (26.8°C). In addition to the seven hours of sunshine makes most days very warm and pleasant.
Sea activities remain in place with the 68°F (20°C) sea temperature still usable for some.
Touring the many statues and monuments is more manageable, as the rainfall days decrease to eight and a half, with the rain gauge collecting a moderately high 4.1" (104.1mm) in precipitation. Packing a raincoat in September is much advised.

What is the temperature in September in Baltimore?

In September, in Baltimore, Maryland, the average high-temperature is 80.2°F (26.8°C), and the average low-temperature is 63.9°F (17.7°C).

What is the most humid month in Baltimore?

With an average relative humidity of 71.3%, September is the most humid month in Baltimore.

What is the average humidity in September in Baltimore?

The average relative humidity in September in Baltimore is 71.3%.

How many days does it rain in September in Baltimore?

In September, in Baltimore, the rain falls for 8.9 days. Throughout September, 4.1" (103.9mm) of precipitation is accumulated.

When it does not snow in Baltimore?

April through October are months without snowfall in Baltimore.

What is the ocean temperature in September in Baltimore?

In Baltimore, Maryland, the average seawater temperature in September is 73.6°F (23.1°C). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 73.6°F (23.1°C) water.

What is the average length of the day in September in Baltimore?

The average length of the day in September is 12.4h.

How many hours of sunshine does Baltimore have in September?

The average sunshine in September in Baltimore is 7.4h.

How high is the UV index in September in Baltimore?

The average daily maximum UV index in September in Baltimore is 7. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays.
Average temperature in September - Baltimore, MD
  • Average high temperature in September: 80.3°F

The warmest month (with the highest average high temperature) is July (89°F).
The month with the lowest average high temperature is January (42.4°F).

  • Average low temperature in September: 63.8°F

The month with the highest average low temperature is July (72.5°F).
The coldest month (with the lowest average low temperature) is January (29.2°F).

Average humidity in September - Baltimore, MD
  • Average humidity in September: 71.3%

The month with the highest relative humidity is September (71.3%).
The month with the lowest relative humidity is April (58.9%).

Average rainfall in September - Baltimore, MD
  • Average rainfall in September: 4.1"

The wettest month (with the highest rainfall) is July (4.6").
The driest month (with the lowest rainfall) is February (2.6").

Average rainfall days in September - Baltimore, MD
  • Average rainfall days in September: 8.9 days

The month with the highest number of rainy days is May (11.2 days).
The month with the lowest number of rainy days is October (8.3 days).

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

The month with the highest snowfall is February (8").
Months with the lowest snowfall are April, May, June, July, August, September and October (0").

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

The month with the highest number of snowfall days is January (3.5 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in September - Baltimore, MD
  • Average sea temperature in September: 73.5°F

The best month for swimming (with the highest average sea temperature) is August (77.5°F).
The coldest month (with the lowest average sea temperature) is February (44.5°F).

Average daylight in September / Average sunshine in September - Baltimore, MD
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 7.4h

The month with most sunshine is July (Average sunshine: 9.4h).
The month with least sunshine is December (Average sunshine: 4.7h).

Average UV index in September - Baltimore, MD
  • Average UV index in September: 7

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 2).