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
Harriman's progression into September involves a gentle drop in the average high-temperature, from a warm 81.5°F (27.5°C) in August to a still moderately hot 74.1°F (23.4°C). Harriman's nights in September cool down to an average low-temperature of 54.9°F (12.7°C).Humidity
In September, the average relative humidity is 78%.Rainfall
In Harriman, in September, it is raining for 12.1 days, with typically 1.54" (39mm) of accumulated precipitation. Throughout the year, in Harriman, there are 141.2 rainfall days, and 25" (635mm) of precipitation is accumulated.Snowfall
In Harriman, New York, snow does not fall in June through September.Daylight
In September, the average length of the day in Harriman is 12h and 28min.On the first day of the month, sunrise is at 6:23 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:53 am and sunset at 6:39 pm EDT.
Sunshine
The average sunshine in September in Harriman, New York, is 8.8h.UV index
The average daily maximum UV index in September in Harriman is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: An average maximum UV index of 4 in September leads to these recommendations:
Make use of precautions - It is urged to ward off sun damage. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Frequently asked questions
What is the usual temperature for Harriman in September?
What is the average humidity in September in Harriman?
How many days does it rain in September in Harriman?
When it does not snow in Harriman?
Does it snow in Harriman in September?
How many hours of daylight does Harriman have in September?
What time are sunrise and sunset in September in Harriman?
How long on average sun shines in September in Harriman?
How high is the UV index in September in Harriman?
Average temperature in September
Harriman, NY
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.3°F).
- Average low temperature in September: 54.9°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in September
Harriman, 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
Harriman, NY
- Average wind speed in September: 5mph
The windiest months (with the highest average wind speed) are January, February and March (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in September
Harriman, NY
- Average humidity in September: 78%
The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is April (74%).
Average rainfall in September
Harriman, NY
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is July (2.68").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in September
Harriman, NY
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is January (5.5 days).
Average snowfall in September
Harriman, NY
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Harriman, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Harriman, NY
- 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 30min).
Average sunshine days in September
Harriman, NY
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is January (21 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in September
Harriman, NY
- 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
Harriman, NY
- Average cloud cover in September: 38
The months with the most cloud cover are February and March (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in September
Harriman, NY
- Average visibility in September: 5mi
The months with the highest visibility are April, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September and October (5mi).
Harriman, New York, USA
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