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 75.6°F (24.2°C) in August to an agreeable 69.4°F (20.8°C). September brings West Valley a consistent average low-temperature of 50.9°F (10.5°C).Humidity
In September, the average relative humidity is 81%.Rainfall
September is the month with the least rainfall. Rain falls for 14.9 days and accumulates 1.57" (40mm) of precipitation.Snowfall
In West Valley, New York, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:40 am and sunset at 7:48 pm. On the last day of September, in West Valley, New York, sunrise is at 7:11 am and sunset at 6:57 pm EDT.
Sunshine
In West Valley, the average sunshine in September is 8.6h.UV index
In West Valley, New York, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 3 suggests these recommendations:
Be vigilant - Preventing sunburn is recommended. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in West Valley?
What is the average humidity in September in West Valley?
What is the driest month in West Valley?
How many days does it rain in September in West Valley?
When it does not snow in West Valley?
Does it snow in West Valley in September?
What is the average length of the day in September in West Valley?
What time are sunrise and sunset in September in West Valley?
How long on average sun shines in September in West Valley?
How high is the UV index in September in West Valley?
Average temperature in September
West Valley, NY
- Average high temperature in September: 69.4°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (27.7°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in September
West Valley, 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
West Valley, NY
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in September
West Valley, NY
- Average humidity in September: 81%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is May (80%).
Average rainfall in September
West Valley, NY
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is April (2.95").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in September
West Valley, NY
- Average rainfall days in September: 14.9 days
The month with the highest number of rainy days is October (18.2 days).
The month with the least rainy days is January (7.4 days).
Average snowfall in September
West Valley, NY
- Average snowfall in September: 0"
The month with the highest snowfall is January (8.11").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
West Valley, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (21.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
West Valley, NY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in September
West Valley, NY
- Average sunshine days in September: 12.7 days
The month with the most sunshine days is September (12.7 days).
The month with the least sunshine days is February (5.6 days).
Average UV index in September
West Valley, NY
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in September
West Valley, NY
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 79).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
West Valley, NY
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February and December (4mi).
West Valley, New York, USA
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