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 signals a subtle shift in temperature, down from 84.7°F (29.3°C) in August to a still moderately hot 76.5°F (24.7°C). The average temperature drops to a cool 55°F (12.8°C) during the night in the month of September.Humidity
The average relative humidity in September is 50%.Rainfall
In Hyannis, in September, it is raining for 8.3 days, with typically 0.87" (22mm) of accumulated precipitation. In Hyannis, during the entire year, the rain falls for 108.7 days and collects up to 15.79" (401mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Hyannis, during the entire year, snow falls for 42.1 days and aggregates up to 17.2" (437mm) of snow.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 6:13 am and sunset at 7:20 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:29 pm MDT.
Sunshine
In September, the average sunshine is 10.2h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 4 during September translates into these guidelines:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
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 in Hyannis?
How much does it rain in September?
When does it start snowing?
How many hours of daylight does Hyannis have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Hyannis have in September?
How high is the UV index in September?
Average temperature in September
Hyannis, NE
- Average high temperature in September: 76.5°F
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is December (34.2°F).
- Average low temperature in September: 55°F
The month with the highest average low temperature is July (64.8°F).
The coldest months (with the lowest average low temperature) are January and December (20.3°F).
Average pressure in September
Hyannis, NE
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Hyannis, NE
- Average wind speed in September: 11.1mph
The windiest month (with the highest average wind speed) is April (12.9mph).
The calmest month (with the lowest average wind speed) is August (10.1mph).
Average humidity in September
Hyannis, NE
- Average humidity in September: 50%
The month with the highest relative humidity is January (73%).
The month with the lowest relative humidity is August (49%).
Average rainfall in September
Hyannis, NE
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in September
Hyannis, NE
- Average rainfall days in September: 8.3 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is December (3.1 days).
Average snowfall in September
Hyannis, NE
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (3.27").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Hyannis, NE
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (8.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Hyannis, NE
- 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: 10h and 1min
The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).
Average sunshine days in September
Hyannis, NE
- Average sunshine days in September: 19 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is July (12 days).
Average UV index in September
Hyannis, NE
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Hyannis, NE
- Average cloud cover in September: 19
The month with the most cloud cover is February (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Hyannis, NE
- 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, Nebraska, USA
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