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
A moderate decline in average high-temperatures is noted in September, moving from 81.9°F (27.7°C) in August to a still warm 75°F (23.9°C). During September, Montclair's temperature falls to a steady low-temperature average of 59.4°F (15.2°C).Humidity
In Montclair, the average relative humidity in September is 75%.Rainfall
In Montclair, during September, the rain falls for 13.2 days and regularly aggregates up to 1.46" (37mm) of precipitation. Throughout the year, there are 153.3 rainfall days, and 24.92" (633mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 27min.On the first day of September in Montclair, sunrise is at 6:24 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:40 pm EDT.
Sunshine
In September, the average sunshine in Montclair is 8.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Be vigilant - Suggestions to stave off sun damage are provided. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September in Montclair?
When it does not snow in Montclair?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Montclair have in September?
How high is the UV index in September?
Average temperature in September
Montclair, NJ
- Average high temperature in September: 75°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in September: 59.4°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).
Average pressure in September
Montclair, 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
Montclair, NJ
- Average wind speed in September: 6.3mph
The windiest months (with the highest average wind speed) are January and March (8.8mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).
Average humidity in September
Montclair, NJ
- Average humidity in September: 75%
The month with the highest relative humidity is February (78%).
The months with the lowest relative humidity are April and August (72%).
Average rainfall in September
Montclair, NJ
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is July (3.07").
The driest month (with the least rainfall) is January (1.38").
Average rainfall days in September
Montclair, NJ
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is January (7.6 days).
Average snowfall in September
Montclair, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.27").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Montclair, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.8 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
Montclair, NJ
- 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 18min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Montclair, NJ
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (10.7 days).
Average UV index in September
Montclair, 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
Montclair, NJ
- Average cloud cover in September: 36
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Montclair, NJ
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Montclair, New Jersey, USA
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