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 transition to September results in a modest reduction in average high-temperature, moving from 82.6°F (28.1°C) in August to a still warm 75°F (23.9°C). Thiells experiences an average temperature drop to a refreshing 57°F (13.9°C) during September nights.Humidity
In Thiells, the average relative humidity in September is 76%.Rainfall
September is the month with the least rainfall. Rain falls for 12.4 days and accumulates 1.89" (48mm) of precipitation.Snowfall
In Thiells, snow does not fall in June through September.Daylight
In Thiells, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:23 am and sunset at 7:28 pm. On the last day of September, sunrise is at 6:52 am and sunset at 6:39 pm EDT.
Sunshine
In Thiells, the average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September in Thiells, New York, is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Heed the precautions - It is counselled to guard against solar damage. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Frequently asked questions
What is the usual temperature for Thiells in September?
What is the average humidity in September in Thiells?
What is the driest month in Thiells?
How much does it rain in Thiells in September?
When it does not snow in Thiells?
Does it snow in Thiells in September?
What is the average length of the day in September in Thiells?
When is the sunrise / sunset in September in Thiells?
How many hours of sunshine does Thiells have in September?
How high is the UV index in September in Thiells?
Average temperature in September
Thiells, NY
- Average high temperature in September: 75°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (34.7°F).
- Average low temperature in September: 57°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in September
Thiells, 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
Thiells, NY
- Average wind speed in September: 5.4mph
The windiest months (with the highest average wind speed) are January and March (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in September
Thiells, NY
- Average humidity in September: 76%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Thiells, NY
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is July (3.23").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in September
Thiells, NY
- Average rainfall days in September: 12.4 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
Thiells, NY
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.46").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Thiells, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Thiells, 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 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Thiells, NY
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is July (11.5 days).
Average UV index in September
Thiells, 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
Thiells, NY
- Average cloud cover in September: 37
The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Thiells, NY
- Average visibility in September: 6mi
The months with the highest visibility are January, March, April, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are February and May (5mi).
Thiells, New York, USA
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