September weather forecast
Havre de Grace, MD

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Weather in September

September is a blend of summer's heat and the cooling approach of autumn. The weather becomes noticeably milder as the month progresses. Falling temperatures are a noticeable trait of September, with temperatures night falling to 59.7°F (15.4°C). With a prominent decrease in rainfall, the town starts to prepare for the crispness of fall. Overall, despite the month starting with warmth, it generally ends with the low hum of the impending autumn.

Temperature

The commencement of September includes a gentle temperature shift, with the average high-temperature dropping a bit from a warm 82.6°F (28.1°C) in August to a still moderately hot 76.5°F (24.7°C). In September, the temperature drops to an average of 59.7°F (15.4°C) at night.

Humidity

In Havre de Grace, the average relative humidity in September is 78%.

Rainfall

In Havre de Grace, Maryland, in September, during 12.2 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. In Havre de Grace, during the entire year, the rain falls for 149.9 days and collects up to 29.41" (747mm) of precipitation.

Snowfall

May through October are months without snowfall in Havre de Grace.

Ocean temperature

In Havre de Grace, the average seawater temperature in September is 72.3°F (22.4°C).
Note: When thinking about a swim in 72.3°F (22.4°C) waters, consider your cold tolerance, the day's sunshine, wind, and air temperature. It is a fun fact that Olympic swimmers dive into waters of 77°F (25°C) to 82.4°F (28°C).

Daylight

The average length of the day in September in Havre de Grace is 12h and 26min.
On the first day of September in Havre de Grace, sunrise is at 6:33 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:47 pm EDT.

Sunshine

The average sunshine in September in Havre de Grace is 9.1h.

UV index

In September, the average daily maximum UV index in Havre de Grace is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 5 translates into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Heads up! The reflection of sand and water notably intensifies UV rays from the Sun.
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Frequently asked questions

What is the usual temperature for Havre de Grace in September?

During September, Havre de Grace experiences an average high-temperature of 76.5°F (24.7°C) and a low-temperature of 59.7°F (15.4°C). In August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is computed to be 89.6°F (32°C).

What is the average humidity in September in Havre de Grace?

In September, the average relative humidity in Havre de Grace, Maryland, is 78%.

How much does it rain in Havre de Grace in September?

In Havre de Grace, in September, it is raining for 12.2 days, with typically 2.01" (51mm) of accumulated precipitation.

When it does not snow in Havre de Grace?

May through October are months without snowfall in Havre de Grace.

What is the water temperature in September in Havre de Grace?

In Havre de Grace, in September, the average water temperature is 72.3°F (22.4°C). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 72.3°F (22.4°C) water may be enjoyable.

What is the average length of the day in September in Havre de Grace?

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

When is the sunrise / sunset in September in Havre de Grace?

On the first day of September in Havre de Grace, Maryland, sunrise is at 6:33 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:47 pm EDT.

How many hours of sunshine does Havre de Grace have in September?

In September, the average sunshine duration is 9.1h.

What is the UV index reading in September in Havre de Grace?

The average daily maximum UV index in September in Havre de Grace, Maryland, is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability 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
Havre de Grace, MD

Average temperature in September - Havre de Grace, MD
  • Average high temperature in September: 76.5°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: 59.7°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

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Average pressure in September
Havre de Grace, MD

Average pressure in September - Havre de Grace, MD
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in September
Havre de Grace, MD

Average wind speed in September - Havre de Grace, MD
  • Average wind speed in September: 6mph

The windiest months (with the highest average wind speed) are February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in September
Havre de Grace, MD

Average humidity in September - Havre de Grace, MD
  • Average humidity in September: 78%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is April (74%).

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Average rainfall in September
Havre de Grace, MD

Average rainfall in September - Havre de Grace, MD
  • Average rainfall in September: 2.01"

The wettest month (with the highest rainfall) is August (3.82").
The driest month (with the least rainfall) is January (1.85").

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Average rainfall days in September
Havre de Grace, MD

Average rainfall days in September - Havre de Grace, MD
  • Average rainfall days in September: 12.2 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (8.3 days).

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Average snowfall in September
Havre de Grace, MD

Average snowfall in September - Havre de Grace, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Havre de Grace, MD

Average snowfall days in September - Havre de Grace, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in September
Havre de Grace, MD

Average sea temperature in September - Havre de Grace, MD
  • Average sea temperature in September: 72.3°F

The best month for swimming (with the highest average sea temperature) is August (76.6°F).
The coldest month (with the lowest average sea temperature) is February (42.5°F).

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Average daylight in September /
Average sunshine in September
Havre de Grace, MD

Average daylight in September / Average sunshine in September - Havre de Grace, 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 24min).

  • Average sunshine in September: 9h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

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Average sunshine days in September
Havre de Grace, MD

Average sunshine days in September - Havre de Grace, MD
  • Average sunshine days in September: 15.8 days

The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is May (11.1 days).

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Average UV index in September
Havre de Grace, MD

Average UV index in September - Havre de Grace, 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).

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Average cloud cover in September
Havre de Grace, MD

Average cloud cover in September - Havre de Grace, MD
  • Average cloud cover in September: 36

The months with the most cloud cover are February and March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in September
Havre de Grace, MD

Average visibility in September - Havre de Grace, 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).

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Havre de Grace, Maryland, USA

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