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 average high-temperature slightly decreases in September, shifting from a moderately hot 79.3°F (26.3°C) in August to an agreeable 72°F (22.2°C). During September, Rockland's temperature averages to a moderate 57.7°F (14.3°C) at night.Humidity
The months with the highest humidity are January, February, June, September and October, with an average relative humidity of 77%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.8 days and typically collects 1.42" (36mm) of precipitation.Snowfall
June through October are months without snowfall.Daylight
In Rockland, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:09 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 6:26 pm EDT.
Sunshine
The average sunshine in September is 8.4h.UV index
In Rockland, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A typical high UV index of 4 in September suggests the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the most humid month?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Rockland have in September?
What is the UV index reading in September?
Average temperature in September
Rockland, MA
- Average high temperature in September: 72°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 (34.9°F).
- Average low temperature in September: 57.7°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).
Average pressure in September
Rockland, 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 (29.93"Hg).
Average wind speed in September
Rockland, MA
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in September
Rockland, MA
- Average humidity in September: 77%
The months with the highest relative humidity are January, February, June, September and October (77%).
The month with the lowest relative humidity is April (71%).
Average rainfall in September
Rockland, MA
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is April (3.11").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in September
Rockland, MA
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in September
Rockland, MA
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.86").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Rockland, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Rockland, 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 2min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Rockland, MA
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is April (12.8 days).
Average UV index in September
Rockland, 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
Rockland, MA
- Average cloud cover in September: 36
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Rockland, MA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Rockland, Massachusetts, USA
Weather forecast for your location
2. Allow the app to use your location