September weather forecast
Orleans, MA

Weather in September

The first month of the autumn, September, is still a comfortable month in Orleans, Massachusetts, with temperature in the range of an average high of 66.6°F (19.2°C) and an average low of 62.4°F (16.9°C).

Temperature

In September, the average high-temperature is practically the same as in August - a comfortable 66.6°F (19.2°C). In September, in Orleans, the average low-temperature is 62.4°F (16.9°C).

Humidity

The average relative humidity in Orleans, Massachusetts, is 80%.

Rainfall

In September, the rain falls for 5.5 days. Throughout September, 0.47" (12mm) of precipitation is accumulated. Throughout the year, in Orleans, there are 78.2 rainfall days, and 5.75" (146mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

In September, the average length of the day in Orleans, Massachusetts, is 12.5h.

Sunshine

In September, the average sunshine is 8.6h.

UV index

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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

What is the average humidity in September in Orleans?

In September, the average relative humidity is 80%.

How much does it rain in Orleans in September?

In September, in Orleans, Massachusetts, the rain falls for 5.5 days. Throughout September, 0.47" (12mm) of precipitation is accumulated.

When it does not snow in Orleans?

April through October are months without snowfall in Orleans, Massachusetts.

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

In September, the average length of the day in Orleans, Massachusetts, is 12.5h.

How many hours of sunshine does Orleans have in September?

In Orleans, Massachusetts, the average sunshine in September is 8.6h.

What is the UV index reading in September in Orleans?

In Orleans, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
Orleans, MA

Average temperature in September - Orleans, MA
  • Average high temperature in September: 19.2°C

The warmest month (with the highest average high temperature) is August (21.9°C).
The month with the lowest average high temperature is January (3.8°C).

  • Average low temperature in September: 16.9°C

The month with the highest average low temperature is August (19.9°C).
The coldest month (with the lowest average low temperature) is January (-0.3°C).

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Average pressure in September
Orleans, MA

Average pressure in September - Orleans, MA
  • Average pressure in September: 1017.7mbar

The month with the highest atmospheric pressure is November (1017.8mbar).
The month with the lowest atmospheric pressure is June (1013.7mbar).

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Average wind speed in September
Orleans, MA

Average wind speed in September - Orleans, MA
  • Average wind speed in September: 21.6km/h

The windiest month (with the highest average wind speed) is January (29.4km/h).
The calmest month (with the lowest average wind speed) is August (18.3km/h).

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Average humidity in September
Orleans, MA

Average humidity in September - Orleans, MA
  • Average humidity in September: 80%

The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is November (74%).

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Average rainfall in September
Orleans, MA

Average rainfall in September - Orleans, MA
  • Average rainfall in September: 12mm

The wettest month (with the highest rainfall) is October (22mm).
The driest months (with the least rainfall) are July and August (7mm).

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Average rainfall days in September
Orleans, MA

Average rainfall days in September - Orleans, MA
  • Average rainfall days in September: 5.5 days

The month with the highest number of rainy days is April (8.2 days).
The month with the least rainy days is February (4.8 days).

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Average snowfall in September
Orleans, MA

Average snowfall in September - Orleans, MA
  • Average snowfall in September: 0mm

The month with the highest snowfall is December (8mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days in September
Orleans, MA

Average snowfall days in September - Orleans, MA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (3.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Orleans, MA
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in September: 8.6h

The month with the most sunshine is August (Average sunshine: 10.7h).
The month with the least sunshine is December (Average sunshine: 4.3h).

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Average sunshine days in September
Orleans, MA

Average sunshine days in September - Orleans, MA
  • Average sunshine days in September: 23.4 days

The month with the most sunshine days is September (23.4 days).
The month with the least sunshine days is February (19.8 days).

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Average UV index in September
Orleans, MA

Average UV index in September - Orleans, MA
  • Average UV index in September: 4

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in September
Orleans, MA

Average cloud cover in September - Orleans, MA
  • Average cloud cover in September: 32

The month with the most cloud cover is December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in September
Orleans, MA

Average visibility in September - Orleans, MA
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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