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 suggests a slight decrease in the average high-temperature, moving from a warm 78.4°F (25.8°C) in August to a pleasant 72.3°F (22.4°C). An average low-temperature of 65.3°F (18.5°C), slightly less than the daytime peak, marks the month of September.Humidity
In Merrick, the average relative humidity in September is 75%.Rainfall
In September, the rain falls for 13.8 days. Throughout September, 2.68" (68mm) of precipitation is accumulated. Throughout the year, there are 159.2 rainfall days, and 37.17" (944mm) of precipitation is accumulated.Snowfall
In Merrick, snow does not fall in May through September.Daylight
The average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:22 am and sunset at 7:25 pm. On the last day of September, in Merrick, sunrise is at 6:50 am and sunset at 6:37 pm EDT.
Sunshine
In Merrick, the average sunshine in September is 9h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A typical high UV index of 5 in September suggests the following recommendations:
Take measures. Individuals with light skin might experience burns in under 30 minutes. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When are sunrise and sunset in September in Merrick?
How many hours of sunshine does Merrick have in September?
What is the UV index intensity in September?
Average temperature in September
Merrick, NY
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in September: 65.3°F
The month with the highest average low temperature is August (71.8°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).
Average pressure in September
Merrick, NY
- 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
Merrick, NY
- Average wind speed in September: 10.2mph
The windiest month (with the highest average wind speed) is January (13.6mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).
Average humidity in September
Merrick, NY
- Average humidity in September: 75%
The months with the highest relative humidity are May and June (78%).
The month with the lowest relative humidity is November (71%).
Average rainfall in September
Merrick, NY
- Average rainfall in September: 2.68"
The wettest month (with the highest rainfall) is July (4.17").
The driest month (with the least rainfall) is January (2.17").
Average rainfall days in September
Merrick, NY
- Average rainfall days in September: 13.8 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
Merrick, NY
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Merrick, NY
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (4.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Merrick, NY
- 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: 9h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Merrick, NY
- Average sunshine days in September: 15 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is July (10.7 days).
Average UV index in September
Merrick, NY
- 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 and December (UV index 2).
Average cloud cover in September
Merrick, NY
- Average cloud cover in September: 32
The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Merrick, NY
- 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).
Merrick, New York, USA
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