Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The arrival of September corresponds with a light shift in temperature, down from a warm 77.4°F (25.2°C) in August to a pleasant 70.2°F (21.2°C). Lee's nighttime temperature in September drops to an average of 50.9°F (10.5°C).Humidity
The average relative humidity in September is 80%.Rainfall
The month with the least rainfall is September, when the rain falls for 7.4 days and typically collects 0.35" (9mm) of precipitation.Snowfall
In Lee, Massachusetts, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:19 am and sunset at 7:26 pm. On the last day of September, sunrise is at 6:49 am and sunset at 6:35 pm EDT.
Sunshine
In Lee, Massachusetts, the average sunshine in September is 8.5h.UV index
In Lee, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 3 during September translates into the following directions:
Take necessary precautions - Protection from skin and eye injury is mandatory. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. 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.
Frequently asked questions
What is the average September temperature in Lee?
What is the average humidity in September in Lee?
What is the driest month in Lee?
How much does it rain in Lee in September?
When it does not snow in Lee?
Does it snow in Lee in September?
What is the average length of the day in September in Lee?
When are sunrise and sunset in September in Lee?
How long on average sun shines in September in Lee?
What is the UV index intensity in September in Lee?
Average temperature in September
Lee, MA
- Average high temperature in September: 70.2°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).
Average pressure in September
Lee, 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 (29.92"Hg).
Average wind speed in September
Lee, MA
- Average wind speed in September: 5.7mph
The windiest months (with the highest average wind speed) are January, February and March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Lee, MA
- Average humidity in September: 80%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Lee, MA
- Average rainfall in September: 0.35"
The wettest month (with the highest rainfall) is July (0.83").
The driest month (with the least rainfall) is September (0.35").
Average rainfall days in September
Lee, MA
- Average rainfall days in September: 7.4 days
The month with the highest number of rainy days is July (11 days).
The month with the least rainy days is January (3.6 days).
Average snowfall in September
Lee, MA
- Average snowfall in September: 0"
The month with the highest snowfall is December (1.34").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Lee, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Lee, MA
- Average daylight in September: 12h and 3min
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 6min).
- Average sunshine in September: 8h and 3min
The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in September
Lee, MA
- Average sunshine days in September: 20.5 days
The month with the most sunshine days is January (23.3 days).
The month with the least sunshine days is June (17.1 days).
Average UV index in September
Lee, MA
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Lee, MA
- Average cloud cover in September: 40
The month with the most cloud cover is February (Cloud cover 60).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in September
Lee, MA
- Average visibility in September: 5mi
The months with the highest visibility are April and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and November (5mi).
Lee, Massachusetts, USA
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