September weather forecast
Westfield, MA

Weather in September

The first month of the autumn, September, is also an agreeable month in Westfield, Massachusetts, with temperature in the range of an average high of 72.1°F (22.3°C) and an average low of 52.9°F (11.6°C).

Temperature

In September, the average high-temperature slightly decreases from a warm 79.7°F (26.5°C) in August to an agreeable 72.1°F (22.3°C). In Westfield, the average low-temperature is 52.9°F (11.6°C).

Humidity

The average relative humidity in September in Westfield is 78%.

Rainfall

The month with the least rainfall in Westfield, Massachusetts, is September, when the rain falls for 13.7 days and typically collects 2.01" (51mm) of precipitation.

Snowfall

In Westfield, snow does not fall in June through September.

Daylight

In September, the average length of the day in Westfield is 12h and 28min.
On the first day of September in Westfield, sunrise is at 6:16 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:35 pm EDT.

Sunshine

In September, the average sunshine is 8.7h.

UV index

In September, the average daily maximum UV index in Westfield is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Westfield?

In September, the average high-temperature is 72.1°F (22.3°C), and the average low-temperature is 52.9°F (11.6°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in July is estimated at 87.8°F (31°C).

What is the average humidity in September in Westfield?

The average relative humidity in September in Westfield, Massachusetts, is 78%.

What is the driest month in Westfield?

September is the month with the least rainfall. Rain falls for 13.7 days and accumulates 2.01" (51mm) of precipitation.

How many days does it rain in September in Westfield?

In Westfield, during September, the rain falls for 13.7 days and regularly aggregates up to 2.01" (51mm) of precipitation.

When it does not snow in Westfield?

In Westfield, snow does not fall in June through September.

Does it snow in Westfield in September?

In Westfield, Massachusetts, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Westfield have in September?

The average day length in September in Westfield is 12h and 28min.

What time are sunrise and sunset in September in Westfield?

In September, on the first day of the month, sunrise is at 6:16 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:35 pm EDT.

How many hours of sunshine does Westfield have in September?

In Westfield, the average sunshine duration in September is 8.7h.

What is the UV index intensity in September in Westfield?

In Westfield, Massachusetts, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Westfield, MA

Average temperature in September - Westfield, MA
  • Average high temperature in September: 72.1°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in September: 52.9°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (18°F).

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Average pressure in September
Westfield, MA

Average pressure in September - Westfield, MA
  • Average pressure in September: 30.06"Hg

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in September
Westfield, MA

Average wind speed in September - Westfield, MA
  • Average wind speed in September: 5.6mph

The windiest months (with the highest average wind speed) are January, February and March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).

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Average humidity in September
Westfield, MA

Average humidity in September - Westfield, MA
  • Average humidity in September: 78%

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in September
Westfield, MA

Average rainfall in September - Westfield, MA
  • Average rainfall in September: 2.01"

The wettest months (with the highest rainfall) are October and December (3.27").
The driest month (with the least rainfall) is September (2.01").

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Average rainfall days in September
Westfield, MA

Average rainfall days in September - Westfield, MA
  • Average rainfall days in September: 13.7 days

The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is January (8.9 days).

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Average snowfall in September
Westfield, MA

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

The month with the highest snowfall is February (5.59").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Westfield, MA

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

The month with the highest number of snowfall days is February (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Westfield, MA
  • Average daylight in September: 12h and 28min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 10min).

  • Average sunshine in September: 8h and 42min

The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in September
Westfield, MA

Average sunshine days in September - Westfield, MA
  • Average sunshine days in September: 13.5 days

The month with the most sunshine days is January (16.2 days).
The month with the least sunshine days is June (10.3 days).

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Average UV index in September
Westfield, MA

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

The month with the highest UV index is June (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
Westfield, MA

Average cloud cover in September - Westfield, MA
  • Average cloud cover in September: 38

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).

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Average visibility in September
Westfield, MA

Average visibility in September - Westfield, MA
  • Average visibility in September: 5mi

The months with the highest visibility are April, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September and October (5mi).

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