October weather forecast
West Chester, PA

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A cool summer day over the colorful cityscape of West Chester, Pennsylvania
A cool summer day over the colorful cityscape of West Chester, Pennsylvania

Weather in October

October ushers in the full glory of fall weather in West Chester, Pennsylvania. The month offers plenty of visual treats, with rustic colors cloaking the cityscape, backdropped by clear azure skies. Temperatures cool down significantly, hinting at the impending chill of winter. In contrast to the drying leaves, rainfall and humidity remain a constant presence throughout the month. The golden, russet and crimson hues of October tell tales of change, marking a significant shift from the heat of the summer to the chill of winter.

Temperature

West Chester's October weather features a mild decline in high-temperatures, reducing from a warm 75.7°F (24.3°C) in September to a comfortable 63.5°F (17.5°C). West Chester sees an average low-temperature of 49.1°F (9.5°C) during October.

Humidity

The months with the highest humidity in West Chester, Pennsylvania, are February and October, with an average relative humidity of 79%.

Rainfall

In West Chester, during October, the rain falls for 9.3 days and regularly aggregates up to 1.02" (26mm) of precipitation. Throughout the year, in West Chester, there are 128.5 rainfall days, and 14.92" (379mm) of precipitation is accumulated.

Snowfall

June through October are months without snowfall.

Daylight

In October, the average length of the day is 11h and 8min.
On the first day of October, sunrise is at 6:59 am and sunset at 6:44 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 6:00 pm EDT.

Sunshine

In West Chester, the average sunshine in October is 5.5h.

UV index

The average daily maximum UV index in October in West Chester is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index of 3 in October interprets into the following recommendations:
Guard yourself - Avoiding sunburn is suggested. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
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Frequently asked questions

What are October temperatures in West Chester?

During October, West Chester experiences an average high-temperature of 63.5°F (17.5°C) and a low-temperature of 49.1°F (9.5°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is estimated at 87.8°F (31°C).

What are the most humid months in West Chester?

February and October, with an average relative humidity of 79%, are most humid months in West Chester, Pennsylvania.

What is the average humidity in October in West Chester?

In October, the average relative humidity is 79%.

How many days does it rain in October in West Chester?

In West Chester, in October, it is raining for 9.3 days, with typically 1.02" (26mm) of accumulated precipitation.

When it does not snow in West Chester?

In West Chester, snow does not fall in June through October.

Does it snow in West Chester in October?

In West Chester, in October, it doesn't snow. In November, it regularly snows.

How many hours of daylight does West Chester have in October?

In West Chester, Pennsylvania, the average day length in October is 11h and 8min.

When are sunrise and sunset in October in West Chester?

On the first day of October in West Chester, sunrise is at 6:59 am and sunset at 6:44 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 6:00 pm EDT.

How long on average sun shines in October in West Chester?

The average sunshine duration in October in West Chester is 5.5h.

How high is the UV index in October in West Chester?

In October, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
West Chester, PA

Average temperature in October - West Chester, PA
  • Average high temperature in October: 63.5°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (36.5°F).

  • Average low temperature in October: 49.1°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).

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Average pressure in October
West Chester, PA

Average pressure in October - West Chester, PA
  • Average pressure in October: 30.03"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in October
West Chester, PA

Average wind speed in October - West Chester, PA
  • Average wind speed in October: 7mph

The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in October
West Chester, PA

Average humidity in October - West Chester, PA
  • Average humidity in October: 79%

The months with the highest relative humidity are February and October (79%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in October
West Chester, PA

Average rainfall in October - West Chester, PA
  • Average rainfall in October: 1.02"

The wettest month (with the highest rainfall) is August (2.01").
The driest month (with the least rainfall) is January (0.83").

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Average rainfall days in October
West Chester, PA

Average rainfall days in October - West Chester, PA
  • Average rainfall days in October: 9.3 days

The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is January (5.7 days).

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Average snowfall in October
West Chester, PA

Average snowfall in October - West Chester, PA
  • Average snowfall in October: 0"

The month with the highest snowfall is March (1.54").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in October
West Chester, PA

Average snowfall days in October - West Chester, PA
  • Average snowfall days in October: 0 days

The month with the highest number of snowfall days is January (5.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in October /
Average sunshine in October
West Chester, PA

Average daylight in October / Average sunshine in October - West Chester, PA
  • Average daylight in October: 11h and 1min

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 October: 5h and 3min

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 October
West Chester, PA

Average sunshine days in October - West Chester, PA
  • Average sunshine days in October: 19.3 days

The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is August (13.1 days).

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Average UV index in October
West Chester, PA

Average UV index in October - West Chester, PA
  • Average UV index in October: 3

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, March, November and December (UV index 2).

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Average cloud cover in October
West Chester, PA

Average cloud cover in October - West Chester, PA
  • Average cloud cover in October: 43

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).

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Average visibility in October
West Chester, PA

Average visibility in October - West Chester, PA
  • Average visibility in October: 6mi

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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West Chester, Pennsylvania, USA

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