September weather forecast
Lawrence, MA

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Weather in September

The arrival of September signals the onset of fall in Lawrence. Temperatures drop significantly from August's highs, while there is zero snowfall. Despite the reduction in temperature, the relative humidity remains consistent with summer months. Lawrence is adorned with tinted foliage and pumpkin displays popping up around town. September’s end wraps up with a homage to Lawrence's enriching cultural heritage through the annual Bread and Roses Festival.

Temperature

The shift from August to September includes a minor decrease in the average high-temperature, lightly dropping from a moderately hot 79.9°F (26.6°C) to an agreeable 72.5°F (22.5°C). The average low-temperature, in September, is a moderate 55.9°F (13.3°C).

Humidity

The average relative humidity in September in Lawrence is 76%.

Rainfall

September is the month with the least rainfall. Rain falls for 11.1 days and accumulates 1.46" (37mm) of precipitation.

Snowfall

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

Daylight

The average length of the day in September is 12h and 29min.
On the first day of the month, sunrise is at 6:10 am and sunset at 7:18 pm. On the last day of September, sunrise is at 6:41 am and sunset at 6:27 pm EDT.

Sunshine

In Lawrence, the average sunshine in September 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 unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.

Frequently asked questions

What are the temperatures in September?

The high-temperature in Lawrence during September is 72.5°F (22.5°C) and the low-temperature is 55.9°F (13.3°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, in July is computed to be 86°F (30°C).

What is the average humidity in September?

The average relative humidity in September is 76%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 11.1 days and typically collects 1.46" (37mm) of precipitation.

How many days does it rain in September in Lawrence?

In September, the rain falls for 11.1 days. Throughout September, 1.46" (37mm) of precipitation is accumulated.

When it does not snow?

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

Does it snow in September?

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

What is the average length of the day in September?

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

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:10 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 6:27 pm EDT.

How long on average sun shines in September?

In September, the average sunshine duration is 8.6h.

How high is the UV index in September?

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

Average temperature in September
Lawrence, MA

Average temperature in September - Lawrence, MA
  • Average high temperature in September: 72.5°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 (32.5°F).

  • Average low temperature in September: 55.9°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).

Average pressure in September
Lawrence, MA

Average pressure in September - Lawrence, MA
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in September
Lawrence, MA

Average wind speed in September - Lawrence, MA
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

Average humidity in September
Lawrence, MA

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

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (71%).

Average rainfall in September
Lawrence, MA

Average rainfall in September - Lawrence, MA
  • Average rainfall in September: 1.46"

The wettest month (with the highest rainfall) is December (2.87").
The driest month (with the least rainfall) is September (1.46").

Average rainfall days in September
Lawrence, MA

Average rainfall days in September - Lawrence, MA
  • Average rainfall days in September: 11.1 days

The month with the highest number of rainy days is May (15.8 days).
The months with the least rainy days are January and February (7.6 days).

Average snowfall in September
Lawrence, MA

Average snowfall in September - Lawrence, 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").

Average snowfall days in September
Lawrence, MA

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

The month with the highest number of snowfall days is January (8.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Lawrence, MA
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in September
Lawrence, MA

Average sunshine days in September - Lawrence, MA
  • Average sunshine days in September: 16.5 days

The month with the most sunshine days is January (17.3 days).
The month with the least sunshine days is April (13.7 days).

Average UV index in September
Lawrence, MA

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

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

Average cloud cover in September
Lawrence, MA

Average cloud cover in September - Lawrence, MA
  • Average cloud cover in September: 35

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 31).

Average visibility in September
Lawrence, MA

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

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

Lawrence, Massachusetts, USA

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