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
September begins with an average high-temperature of a still warm 74.3°F (23.5°C), reflecting close similarity to the preceding month. Yorktown's nights in September experience an average temperature drop to a mild 56.5°F (13.6°C).Humidity
In September, the average relative humidity is 79%.Rainfall
In Yorktown, in September, during 13.7 rainfall days, 1.81" (46mm) of precipitation is typically accumulated. Throughout the year, there are 162 rainfall days, and 28.11" (714mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 7:10 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 7:25 pm EDT.
Sunshine
In September, the average sunshine is 8.1h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Yorktown in September?
What is the average humidity in September?
How many days 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?
How many hours of sunshine does Yorktown have in September?
What is the UV index reading in September?
Average temperature in September
Yorktown, IN
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (32.2°F).
- Average low temperature in September: 56.5°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in September
Yorktown, IN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Yorktown, IN
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Yorktown, IN
- Average humidity in September: 79%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Yorktown, IN
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is February (1.57").
Average rainfall days in September
Yorktown, IN
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is May (18.9 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in September
Yorktown, IN
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Yorktown, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Yorktown, IN
- Average daylight in September: 12h and 2min
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 24min).
- Average sunshine in September: 8h and 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
Yorktown, IN
- Average sunshine days in September: 13 days
The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is May (9 days).
Average UV index in September
Yorktown, IN
- 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, October, November and December (UV index 2).
Average cloud cover in September
Yorktown, IN
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are June, July and August (Cloud cover 33).
Average visibility in September
Yorktown, IN
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Yorktown, Indiana, USA
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