September weather forecastLyons, NJ
September
Weather in September
September, the first month of the autumn in Lyons, is also a moderately hot month, with an average temperature fluctuating between 75°F (23.9°C) and 57.2°F (14°C).Temperature
The start of September signals a gentle decrease in the average high-temperature, transitioning from 81.9°F (27.7°C) in August to a still warm 75°F (23.9°C). Throughout September, Lyons registers a consistent average low-temperature of 57.2°F (14°C).Humidity
The average relative humidity in September is 77%.Rainfall
The month with the least rainfall is September, when the rain falls for 13.2 days and typically collects 1.57" (40mm) of precipitation.Snowfall
In Lyons, snow does not fall in June through October.Daylight
In September, the average length of the day in Lyons is 12h and 27min.On the first day of the month, sunrise is at 6:25 am and sunset at 7:29 pm. On the last day of September, in Lyons, sunrise is at 6:54 am and sunset at 6:41 pm EDT.
Sunshine
In September, the average sunshine in Lyons is 8.6h.UV index
In September, the average daily maximum UV index in Lyons is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Exercise prevention - Protecting skin and eyes from harm is required. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lyons, NJ
- Average high temperature in September: 75°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (35.1°F).
- Average low temperature in September: 57.2°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in September
Lyons, NJ
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Lyons, NJ
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in September
Lyons, NJ
- Average humidity in September: 77%
The months with the highest relative humidity are February and October (80%).
The month with the lowest relative humidity is April (74%).
Average rainfall in September
Lyons, NJ
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is July (3.11").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in September
Lyons, NJ
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in September
Lyons, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is March (4.09").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Lyons, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.2 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
Lyons, NJ
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in September
Lyons, NJ
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (11.2 days).
Average UV index in September
Lyons, NJ
- 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
Lyons, NJ
- Average cloud cover in September: 40
The months with the most cloud cover are February, March and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in September
Lyons, NJ
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, July, August, October, November and December (6mi).
The months with the lowest visibility are May, June and September (5mi).
