Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The start of September involves a subtle temperature drop, shifting from 82.6°F (28.1°C) in August to a still moderately hot 76.5°F (24.7°C). Havre de Grace records an average temperature drop to a moderate 59.7°F (15.4°C) in September.Humidity
In September, the average relative humidity is 78%.Rainfall
In Havre de Grace, during September, the rain falls for 12.2 days and regularly aggregates up to 2.01" (51mm) of precipitation. 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
In Havre de Grace, snow does not fall in May through October.Ocean temperature
In Havre de Grace, the average seawater temperature in September is 72.3°F (22.4°C).Note: Think about diving into 72.3°F (22.4°C) waters. Factors like your sensitivity to cold, the brightness of the sun, wind conditions, and the day's warmth play a role. For reference, Olympic swimming competitions use waters between 77°F (25°C) and 82.4°F (28°C).
Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:34 pm. On the last day of September, sunrise is at 7:00 am and sunset at 6:47 pm EDT.
Sunshine
In September, the average sunshine is 9.1h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 5 transforms into these recommendations:
Take precautions - Protection against sunburn is recommended. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. During bright days, sunglasses that offer UVA and UVB defense are recommended. Stay cautious! Sand and water reflections increase UV radiation potency.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the ocean temperature in September?
What is the average length of the day in September in Havre de Grace?
When is the sunrise / sunset in September in Havre de Grace?
How long on average sun shines in September?
What is the UV index reading in September in Havre de Grace?
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).
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).
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).
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%).
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").
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).
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").
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).
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).
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).
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).
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).
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).
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).
Havre de Grace, Maryland, USA
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