September Weather forecast - Autumn forecast

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

This courthouse of the York County, Pennsylvania, stands tall in the bright evening sunlight rays

Weather in September

September, the first month of the autumn in York, is also a moderately hot month, with an average temperature ranging between min 56.3°F (13.5°C) and max 74.7°F (23.7°C).

Temperature

In September, the average high-temperature marginally drops from a moderately hot 81°F (27.2°C) in August to a still warm 74.7°F (23.7°C). The average low-temperature, in York, is 56.3°F (13.5°C).

Humidity

In York, the average relative humidity in September is 79%.

Rainfall

In York, during 10.5 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. In York, during the entire year, the rain falls for 134.1 days and collects up to 17.83" (453mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of September, sunrise is at 6:34 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:51 pm EDT.

Sunshine

In September, the average sunshine is 8.9h.

UV index

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

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FAQ

What is the temperature in September in York?

In September, the average high-temperature is 74.7°F (23.7°C), and the average low-temperature is 56.3°F (13.5°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines relative humidity and air temperature, in August is appraised at 86°F (30°C).

What is the average humidity in September in York?

In September, the average relative humidity in York is 79%.

How many days does it rain in September in York?

In York, Pennsylvania, during September, the rain falls for 10.5 days and regularly aggregates up to 1.22" (31mm) of precipitation.

When it does not snow in York?

In York, snow does not fall in May through September.

Does it snow in York in September?

In York, Pennsylvania, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does York have in September?

In September, the average day length in York is 12h and 26min.

When are sunrise and sunset in September in York?

In September, on the first day of the month, sunrise is at 6:34 am and sunset at 7:39 pm. On the last day of the month, in York, sunrise is at 7:02 am and sunset at 6:51 pm EDT.

How long on average sun shines in September in York?

The average sunshine duration in September in York is 8.9h.

How high is the UV index in September in York?

In September, the average daily maximum UV index in York, Pennsylvania, is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

81°F 27.2°C

74.7°F 23.7°C

63.1°F 17.3°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

5.5mph 8.9km/h

5.9mph 9.5km/h

7.6mph 12.2km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

14.3

16.8

18.4

Average UV index

Average cloud cover

Average visibility

Average temperature in September
York, PA

Average high temperature in September: 74.7°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (35.4°F).

Average low temperature in September: 56.3°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 (22.6°F).

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Average pressure in September
York, PA

Average pressure in September: 30.06"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in September
York, PA

Average wind speed in September: 5.7mph

The windiest month (with the highest average wind speed) is March (8.7mph).
The calmest month (with the lowest average wind speed) is August (5mph).

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Average humidity in September
York, PA

Average humidity in September: 79%

The months with the highest relative humidity are February, May and October (80%).
The months with the lowest relative humidity are March and April (76%).

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Average rainfall in September
York, PA

Average rainfall in September: 1.22"

The wettest months (with the highest rainfall) are July and August (2.01").
The driest month (with the least rainfall) is January (1.06").

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Average rainfall days in September
York, PA

Average rainfall days in September: 10.5 days

The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is January (6 days).

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Average snowfall in September
York, PA

Average snowfall in September: 0"

The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
York, PA

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
York, PA

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 5min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in September
York, PA

Average sunshine days in September: 16.8 days

The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is May (12.8 days).

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Average UV index in September
York, PA

Average UV index in September: 4

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
York, PA

Average cloud cover in September: 38

The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in September
York, PA

Average visibility in September: 5mi

The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).

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September weather forecast
York, PA

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