September weather forecast
Newton, MA

Ancient historic buildings within the Union Historic District in Newton City, Massachusetts
Ancient historic buildings within the Union Historic District in Newton City, Massachusetts

Weather in September

September, the first month of the autumn, in Newton, is still a pleasant month, with average temperature ranging between max 73°F (22.8°C) and min 56.3°F (13.5°C).

Temperature

In Newton, Massachusetts, the average high-temperature marginally drops, from a warm 81°F (27.2°C) in August, to an agreeable 73°F (22.8°C). In Newton, in September, the average low-temperature is 56.3°F (13.5°C).

Humidity

In September, the average relative humidity in Newton is 76%.

Rainfall

The month with the least rainfall in Newton is September when the rain falls for 6.6 days and typically collects 0.24" (6mm) of precipitation.

Snowfall

June through October are months without snowfall.

Daylight

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

Sunshine

In September, the average sunshine in Newton is 8.6h.

UV index

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 4 transform into the following instructions:
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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
[Resources]

FAQ

What is the average humidity in September in Newton?

In Newton, the average relative humidity in September is 76%.

What is the driest month in Newton?

September is the month with the least rainfall in Newton, Massachusetts. Rain falls for 6.6 days and accumulates 0.24" (6mm) of precipitation.

How much does it rain in Newton in September?

In Newton, Massachusetts, in September, it is raining for 6.6 days, with typically 0.24" (6mm) of accumulated precipitation.

When it does not snow in Newton?

June through October are months without snowfall in Newton, Massachusetts.

How many hours of daylight does Newton have in September?

The average length of the day in September in Newton is 12.5h.

How many hours of sunshine does Newton have in September?

In September, the average sunshine is 8.6h.

What is the UV index intensity in September in Newton?

In September, the average daily maximum UV index in Newton is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV rays.

Average temperature in September
Newton, MA

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

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (33.6°F).

  • Average low temperature in September: 56.3°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).

[Resources]

Average pressure in September
Newton, MA

Average pressure in September - Newton, MA
  • Average pressure in September: 30.05"

The month with the highest atmospheric pressure is November (30.07").
The month with the lowest atmospheric pressure is June (29.92").

[Resources]

Average wind speed in September
Newton, MA

Average wind speed in September - Newton, MA
  • Average wind speed in September: 6.3mph

The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).

[Resources]

Average humidity in September
Newton, MA

Average humidity in September - Newton, MA
  • Average humidity in September: 76%

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (70%).

[Resources]

Average rainfall in September
Newton, MA

Average rainfall in September - Newton, MA
  • Average rainfall in September: 0.24"

The wettest month (with the highest rainfall) is November (0.67").
The driest month (with the least rainfall) is September (0.24").

[Resources]

Average rainfall days in September
Newton, MA

Average rainfall days in September - Newton, MA
  • Average rainfall days in September: 6.6 days

The month with the highest number of rainy days is July (10.2 days).
The month with the least rainy days is February (4.1 days).

[Resources]

Average snowfall in September
Newton, MA

Average snowfall in September - Newton, MA
  • Average snowfall in September: 0"

The month with the highest snowfall is December (0.91").
Months with the least snowfall are June, July, August, September and October (0").

[Resources]

Average snowfall days in September
Newton, MA

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

The month with the highest number of snowfall days is January (4.9 days).
Months with the least snowfall days are June, July, August and September (0 days).

[Resources]

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

Average daylight in September / Average sunshine in September - Newton, 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: 9.1h).

  • Average sunshine in September: 8.6h

The month with the most sunshine is August (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.7h).

[Resources]

Average sunshine days in September
Newton, MA

Average sunshine days in September - Newton, MA
  • Average sunshine days in September: 21.4 days

Months with the most sunshine days are January and November (22.5 days).
The month with the least sunshine days is June (17.5 days).

[Resources]

Average UV index in September
Newton, MA

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

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

[Resources]

Average cloud cover in September
Newton, MA

Average cloud cover in September - Newton, MA
  • Average cloud cover in September: 36

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 32).

[Resources]

Average visibility in September
Newton, MA

Average visibility in September - Newton, MA
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location