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
With the onset of September, the average high-temperature subtly recedes from August's warm 78.4°F (25.8°C) to a pleasant 70.9°F (21.6°C). Monterey witnesses an average low-temperature of 51.3°F (10.7°C) throughout the month of September.Humidity
In Monterey, the average relative humidity in September is 80%.Rainfall
In Monterey, in September, during 12.7 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. Throughout the year, there are 157.8 rainfall days, and 31.69" (805mm) of precipitation is accumulated.Snowfall
In Monterey, 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 September, sunrise is at 6:19 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:35 pm EDT.
Sunshine
The average sunshine in September in Monterey is 8.5h.UV index
In Monterey, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 4 during September translates into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Monterey have in September?
How high is the UV index in September?
Average temperature in September
Monterey, MA
- Average high temperature in September: 70.9°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (29.1°F).
- Average low temperature in September: 51.3°F
The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in September
Monterey, 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).
Average wind speed in September
Monterey, MA
- Average wind speed in September: 5.6mph
The windiest months (with the highest average wind speed) are January and March (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in September
Monterey, MA
- Average humidity in September: 80%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Monterey, MA
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is October (3.03").
The driest month (with the least rainfall) is January (2.13").
Average rainfall days in September
Monterey, MA
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in September
Monterey, MA
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.89").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Monterey, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (13.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Monterey, 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 12min).
- 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 54min).
Average sunshine days in September
Monterey, MA
- Average sunshine days in September: 15.5 days
The months with the most sunshine days are September and November (15.5 days).
The month with the least sunshine days is February (11.1 days).
Average UV index in September
Monterey, MA
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Monterey, MA
- Average cloud cover in September: 40
The month with the most cloud cover is February (Cloud cover 57).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in September
Monterey, MA
- Average visibility in September: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Monterey, Massachusetts, USA
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