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
Hyannis Port ushers in September with an average high-temperature of an enjoyable 67.3°F (19.6°C), showing a close resemblance to the previous month. September nights in Hyannis Port cool to an average low-temperature of 62.8°F (17.1°C), a marginal decrease from its daytime equivalent.Humidity
In Hyannis Port, the average relative humidity in September is 79%.Rainfall
In Hyannis Port, in September, it is raining for 11.3 days, with typically 1.93" (49mm) of accumulated precipitation. In Hyannis Port, during the entire year, the rain falls for 157.2 days and collects up to 31.77" (807mm) of precipitation.Snowfall
In Hyannis Port, Massachusetts, snow does not fall in May through November.Daylight
The average length of the day in September in Hyannis Port, Massachusetts, is 12h and 28min.On the first day of the month, sunrise is at 6:07 am and sunset at 7:14 pm. On the last day of September, sunrise is at 6:37 am and sunset at 6:24 pm EDT.
Sunshine
The average sunshine in September in Hyannis Port is 8.8h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: The UV index of 4 in September translates into these instructions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Frequently asked questions
What are the temperatures in Hyannis Port in September?
What is the average humidity in September in Hyannis Port?
How many days does it rain in September in Hyannis Port?
When it does not snow in Hyannis Port?
What is the average length of the day in September in Hyannis Port?
When are sunrise and sunset in September in Hyannis Port?
How long on average sun shines in September in Hyannis Port?
What is the UV index intensity in September in Hyannis Port?
Average temperature in September
Hyannis Port, MA
- Average high temperature in September: 67.3°F
The warmest month (with the highest average high temperature) is August (72.5°F).
The month with the lowest average high temperature is January (38.3°F).
- Average low temperature in September: 62.8°F
The month with the highest average low temperature is August (68.2°F).
The coldest month (with the lowest average low temperature) is January (30.4°F).
Average pressure in September
Hyannis Port, 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
Hyannis Port, MA
- Average wind speed in September: 12.6mph
The windiest month (with the highest average wind speed) is January (16.5mph).
The calmest month (with the lowest average wind speed) is August (10.6mph).
Average humidity in September
Hyannis Port, MA
- Average humidity in September: 79%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is November (74%).
Average rainfall in September
Hyannis Port, MA
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is October (3.7").
The driest month (with the least rainfall) is August (1.73").
Average rainfall days in September
Hyannis Port, MA
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is April (15.8 days).
The month with the least rainy days is February (10.3 days).
Average snowfall in September
Hyannis Port, MA
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.93").
The months with the least snowfall are May, June, July, August, September, October and November (0").
Average snowfall days in September
Hyannis Port, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.1 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
Hyannis Port, MA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in September
Hyannis Port, MA
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is August (17.7 days).
The month with the least sunshine days is February (11.4 days).
Average UV index in September
Hyannis Port, 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
Hyannis Port, MA
- Average cloud cover in September: 31
The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Hyannis Port, 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).
Hyannis Port, Massachusetts, USA
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