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, Jefferson experiences a modest temperature adjustment, with the average high-temperature gently receding from a warm 74.5°F (23.6°C) in August to an agreeable 68°F (20°C). Jefferson reports a consistent average low-temperature of 48°F (8.9°C) throughout September nights.Humidity
In Jefferson, New York, the average relative humidity in September is 82%.Rainfall
In Jefferson, in September, it is raining for 12.7 days, with typically 2.01" (51mm) of accumulated precipitation. In Jefferson, during the entire year, the rain falls for 150.7 days and collects up to 27.83" (707mm) of precipitation.Snowfall
In Jefferson, snow does not fall in June through September.Daylight
In Jefferson, the average length of the day in September is 12h and 29min.On the first day of September in Jefferson, sunrise is at 6:24 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:41 pm EDT.
Sunshine
In September, the average sunshine is 8.1h.UV index
In Jefferson, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: An average maximum UV index of 3 in September leads to these recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Jefferson in September?
What is the average humidity in September in Jefferson?
How much does it rain in Jefferson in September?
When it does not snow in Jefferson?
Does it snow in Jefferson in September?
How many hours of daylight does Jefferson have in September?
When are sunrise and sunset in September in Jefferson?
How many hours of sunshine does Jefferson have in September?
What is the UV index reading in September in Jefferson?
Average temperature in September
Jefferson, NY
- Average high temperature in September: 68°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in September: 48°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in September
Jefferson, NY
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Jefferson, NY
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Jefferson, NY
- Average humidity in September: 82%
The months with the highest relative humidity are February and December (87%).
The months with the lowest relative humidity are April, May, June and July (80%).
Average rainfall in September
Jefferson, NY
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is August (3.27").
The driest month (with the least rainfall) is January (1.5").
Average rainfall days in September
Jefferson, NY
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (4.6 days).
Average snowfall in September
Jefferson, NY
- Average snowfall in September: 0"
The month with the highest snowfall is December (9.84").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Jefferson, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (19 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Jefferson, NY
- 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 6min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 2h and 48min).
Average sunshine days in September
Jefferson, NY
- Average sunshine days in September: 15 days
The month with the most sunshine days is September (15 days).
The month with the least sunshine days is February (7.5 days).
Average UV index in September
Jefferson, NY
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in September
Jefferson, NY
- Average cloud cover in September: 45
The month with the most cloud cover is February (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 42).
Average visibility in September
Jefferson, NY
- Average visibility in September: 4mi
The months with the highest visibility are January, April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are February, March and September (4mi).
Jefferson, New York, USA
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