September weather forecast
Salem, MA

The gray Witch House located in Salem Town, Massachusetts
The gray Witch House located in Salem Town, Massachusetts

Weather in September

September, the first month of the autumn in Salem, is still a warm month, with an average temperature fluctuating between 53.6°F (12°C) and 73.4°F (23°C).

Temperature

In Salem, the average high-temperature in September slightly decreases from a moderately hot 80.6°F (27°C) in August to a still warm 73.4°F (23°C). In September, in Salem, Massachusetts, the average low-temperature is 53.6°F (12°C).

Rainfall

In Salem, in September, during 8 rainfall days, 3.35" (85mm) of precipitation is typically accumulated. Throughout the year, there are 124 rainfall days, and 43.03" (1093mm) of precipitation is accumulated.

Ocean temperature

In September, the average ocean temperature is 60.8°F (16°C).
Note: For swimming, a surface water temperature of 60.8°F (16°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

Daylight

In Salem, Massachusetts, the average length of the day in September is 12h and 29min.
On the first day of September in Salem, sunrise is at 6:08 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 6:27 pm EDT.

Sunshine

In September, the average sunshine is 8h.

UV index

The average daily maximum UV index in September in Salem is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The daily maximum UV index of 6 in September interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

How many days does it rain in September in Salem?

In September, in Salem, Massachusetts, the rain falls for 8 days. Throughout September, 3.35" (85mm) of precipitation is accumulated.

How cold is the water in September in Salem?

In Salem, Massachusetts, the average seawater temperature in September is 60.8°F (16°C). For most, swimming in 60.8°F (16°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

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

In Salem, Massachusetts, the average day length in September is 12h and 29min.

When are sunrise and sunset in September in Salem?

On the first day of September in Salem, sunrise is at 6:08 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 6:27 pm EDT.

How many hours of sunshine does Salem have in September?

In September, the average sunshine duration in Salem, Massachusetts, is 8h.

How high is the UV index in September in Salem?

In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.
Average rainfall days
Average sunshine
Average UV index

Average temperature in September
Salem, MA

Average temperature in September - Salem, MA
  • Average high temperature in September: 73°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in September: 54°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (18°F).

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Average rainfall in September
Salem, MA

Average rainfall in September - Salem, MA
  • Average rainfall in September: 3.3"

The wettest month (with the highest rainfall) is November (4.6").
The driest month (with the least rainfall) is July (3").

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Average rainfall days in September
Salem, MA

Average rainfall days in September - Salem, MA
  • Average rainfall days in September: 8 days

The month with the highest number of rainy days is December (12 days).
The month with the least rainy days is September (8 days).

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Average sea temperature in September
Salem, MA

Average sea temperature in September - Salem, MA
  • Average sea temperature in September: 61°F

The best month for swimming (with the highest average sea temperature) is August (64°F).
The coldest month (with the lowest average sea temperature) is March (37°F).

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Average daylight in September /
Average sunshine in September
Salem, MA

Average daylight in September / Average sunshine in September - Salem, MA
  • Average daylight in September: 12h and 29min

The month with the longest days is June (Average daylight: 15h and 15min).
The month with the shortest days is December (Average daylight: 9h and 7min).

  • Average sunshine in September: 8h

The months with the most sunshine are June, July and August (Average sunshine: 9h).
The months with the least sunshine are January, November and December (Average sunshine: 5h).

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Average UV index in September
Salem, MA

Average UV index in September - Salem, MA
  • Average UV index in September: 6

The months with the highest UV index are June and July (UV index 8).
The months with the lowest UV index are January and December (UV index 1).

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