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
South Orleans observes an average high-temperature of a comfortable 66.6°F (19.2°C) in September, barely different from 71.4°F (21.9°C) in August. South Orleans's nighttime temperatures in September see a subtle dip to an average of 62.4°F (16.9°C).Humidity
In September, the average relative humidity is 80%.Rainfall
In South Orleans, in September, during 5.5 rainfall days, 0.47" (12mm) of precipitation is typically accumulated. In South Orleans, during the entire year, the rain falls for 78.2 days and collects up to 5.75" (146mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In South Orleans, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:06 am and sunset at 7:12 pm. On the last day of the month, sunrise is at 6:36 am and sunset at 6:22 pm EDT.
Sunshine
The average sunshine in September is 8.6h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Adopt protective measures - Suggestions to resist sunburn are offered. Given the potency of the midday Sun's UV radiation, one should avoid prolonged 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 September temperatures in South Orleans?
What is the average humidity in September in South Orleans?
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 long on average sun shines in September?
What is the UV index intensity in September in South Orleans?
Average temperature in September
South Orleans, MA
- Average high temperature in September: 66.6°F
The warmest month (with the highest average high temperature) is August (71.4°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in September: 62.4°F
The month with the highest average low temperature is August (67.8°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).
Average pressure in September
South Orleans, 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
South Orleans, MA
- Average wind speed in September: 13.4mph
The windiest month (with the highest average wind speed) is January (18.3mph).
The calmest month (with the lowest average wind speed) is August (11.4mph).
Average humidity in September
South Orleans, MA
- Average humidity in September: 80%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is November (74%).
Average rainfall in September
South Orleans, MA
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is October (0.87").
The driest months (with the least rainfall) are July and August (0.28").
Average rainfall days in September
South Orleans, MA
- Average rainfall days in September: 5.5 days
The month with the highest number of rainy days is April (8.2 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in September
South Orleans, MA
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.31").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
South Orleans, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
South Orleans, 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 4min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in September
South Orleans, MA
- Average sunshine days in September: 23.4 days
The month with the most sunshine days is September (23.4 days).
The month with the least sunshine days is February (19.8 days).
Average UV index in September
South Orleans, MA
- Average UV index in September: 4
The months with the highest UV index are 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
South Orleans, MA
- Average cloud cover in September: 32
The month with the most cloud cover is December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
South Orleans, 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).
South Orleans, Massachusetts, USA
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