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 arrival of September, Harrison experiences a modest decline in average high-temperatures, transitioning from 81.3°F (27.4°C) in August to a still moderately hot 74.5°F (23.6°C). During the month of September, Harrison experiences a steady low-temperature average of 61.7°F (16.5°C).Humidity
The average relative humidity in September is 73%.Rainfall
In September, the rain falls for 12.9 days. Throughout September, 1.85" (47mm) of precipitation is accumulated. In Harrison, during the entire year, the rain falls for 150.3 days and collects up to 27.72" (704mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September in Harrison, New Jersey, is 12h and 27min.On the first day of September in Harrison, sunrise is at 6:24 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:39 pm EDT.
Sunshine
In Harrison, the average sunshine in September is 8.9h.UV index
In Harrison, New Jersey, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: During September, 5 as the daily maximum UV index converts into the following advice:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Frequently asked questions
What is the temperature in September in Harrison?
What is the average humidity in September in Harrison?
How many days does it rain in September in Harrison?
When it does not snow in Harrison?
What is the average length of the day in September in Harrison?
When is the sunrise / sunset in September in Harrison?
How long on average sun shines in September in Harrison?
How high is the UV index in September in Harrison?
Average temperature in September
Harrison, NJ
- Average high temperature in September: 74.5°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (36.3°F).
- Average low temperature in September: 61.7°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).
Average pressure in September
Harrison, NJ
- Average pressure in September: 30.05"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
Harrison, NJ
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in September
Harrison, NJ
- Average humidity in September: 73%
The months with the highest relative humidity are February and December (75%).
The month with the lowest relative humidity is August (70%).
Average rainfall in September
Harrison, NJ
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is July (3.23").
The driest months (with the least rainfall) are January and February (1.69").
Average rainfall days in September
Harrison, NJ
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in September
Harrison, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is March (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Harrison, NJ
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (5.3 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
Harrison, NJ
- Average daylight in September: 12h and 3min
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 5min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Harrison, NJ
- Average sunshine days in September: 15.2 days
The month with the most sunshine days is January (19.6 days).
The month with the least sunshine days is July (12 days).
Average UV index in September
Harrison, NJ
- Average UV index in September: 5
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
Harrison, NJ
- Average cloud cover in September: 34
The months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Harrison, NJ
- 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).
Harrison, New Jersey, USA
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