Climate and monthly weather forecast
Summerdale, PA

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Weather in January

January, like December, in Summerdale, Pennsylvania, is a wintry winter month, with temperature in the range of an average high of 35.1°F (1.7°C) and an average low of 22.1°F (-5.5°C). The coldest time of the year is January, with temperatures averaging a high of 35.1°F (1.7°C) and a low of 22.1°F (-5.5°C). Weather in January »

Weather in February

The last month of the winter, February, is another cold month in Summerdale, Pennsylvania, with an average temperature varying between 23.9°F (-4.5°C) and 38.3°F (3.5°C). A minimal variation is noted in Summerdale's average high-temperature at the onset of February, reaching a still wintry 38.3°F (3.5°C) from January's 35.1°F (1.7°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Summerdale, Pennsylvania, with temperature in the range of an average low of 31.6°F (-0.2°C) and an average high of 47.8°F (8.8°C). March's arrival sees a rise in the average high-temperature, jumping from February's icy 38.3°F (3.5°C) to a frosty 47.8°F (8.8°C). Weather in March »

Weather in April

April is a mild spring month in Summerdale, Pennsylvania, with an average temperature fluctuating between 41.7°F (5.4°C) and 60.1°F (15.6°C). Summerdale's transition into April is marked by a rise in the average high-temperature, advancing from a frosty 47.8°F (8.8°C) in March to a refreshing 60.1°F (15.6°C). Weather in April »

Weather in May

The last month of the spring, May, is an agreeable month in Summerdale, Pennsylvania, with an average temperature ranging between max 70.3°F (21.3°C) and min 51.4°F (10.8°C). The start of May brings a shift in the average high-temperature, increasing from April's mild 60.1°F (15.6°C) to a pleasant 70.3°F (21.3°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Summerdale, Pennsylvania, with an average temperature varying between 78.1°F (25.6°C) and 58.6°F (14.8°C). June's arrival coincides with a marginal rise in the average high-temperature, moving from May's agreeable 70.3°F (21.3°C) to a warm 78.1°F (25.6°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Summerdale, Pennsylvania, with temperature in the range of an average high of 83.8°F (28.8°C) and an average low of 63.5°F (17.5°C). The warmest temperatures occur during July, when averages reach a peak of 83.8°F (28.8°C) and a low of 63.5°F (17.5°C). For July, the heat index is estimated at a hot 91.4°F (33°C). Weather in July »

Weather in August

August, the last month of the summer in Summerdale, is also a moderately hot month, with an average temperature fluctuating between 81.5°F (27.5°C) and 61.9°F (16.6°C). The average high-temperature during August registers at a still warm 81.5°F (27.5°C), maintaining a close resemblance to the previous month. Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Summerdale, Pennsylvania, with temperature in the range of an average low of 55.6°F (13.1°C) and an average high of 74.3°F (23.5°C). September's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from August's moderately hot 81.5°F (27.5°C) to a still warm 74.3°F (23.5°C). Weather in September »

Weather in October

October, like September, in Summerdale, Pennsylvania, is another refreshing autumn month, with an average temperature fluctuating between 62.8°F (17.1°C) and 46°F (7.8°C). With October's arrival, Summerdale sees a decrease in average high-temperatures, moving from a moderately hot 74.3°F (23.5°C) in September to a comfortable 62.8°F (17.1°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cool month in Summerdale, Pennsylvania, with an average temperature fluctuating between 35.2°F (1.8°C) and 50°F (10°C). November comes with a decrease in the average high-temperature, falling from a comfortable 62.8°F (17.1°C) in October to a cool 50°F (10°C). Weather in November »

Weather in December

December, the first month of the winter in Summerdale, is still a cold month, with an average temperature fluctuating between 41°F (5°C) and 29.7°F (-1.3°C). The beginning of December involves a decrease in the average high-temperature, transitioning from a fresh 50°F (10°C) in November to an icy 41°F (5°C). Weather in December »

Frequently asked questions

What part of the year is the coldest?

January, characterized by an average high temperature of 35.1°F (1.7°C) and a low temperature of 22.1°F (-5.5°C), is generally the coldest month.

What is the driest month?

January and February are months with the least rain when the rain falls for 5.7 days and typically aggregates up to 0.71" (18mm) of rain.

How much does it rain?

Throughout the year, there are 122.3 rainfall days, and 11.73" (298mm) of precipitation is accumulated.

When does it snow?

Months with snowfall in Summerdale, Pennsylvania, are January through April, November and December.

How many days does it snow?

Throughout the year, in Summerdale, there are 19.9 snowfall days, and 4.29" (109mm) of snow is accumulated.

When is the lowest UV index?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the most humid month?

February is the most humid month, with an average relative humidity of 80%.

When does it snow the most?

February is the month with the most snowfall. Snow falls for 5.6 days and accumulates 1.3" (33mm) of snow.

What is the month with the least sunshine?

With an average of 4.5h of sunshine, February has the least sunshine of the year.

What is the least humid month?

The months with the lowest humidity are March and April, with an average relative humidity of 75%.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

When it does not snow?

In Summerdale, snow does not fall in May through October.

What are the months with the highest UV index?

The months with the highest UV index are May through July, with an average maximum UV index of 6.

When are the longest days?

With an average of 15h and 0min of daylight, June has the longest days of the year.

What is the hottest time of year?

July is the warmest month of the year, registering average temperatures as high as 83.8°F (28.8°C) and as low as 63.5°F (17.5°C).

What month has the most sunshine?

The month with the most sunshine is July, with an average of 10.5h of sunshine.

What is the wettest month?

The month with the most rainfall is August, when the rain falls for 12.3 days and typically aggregates up to 1.3" (33mm) of precipitation.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 24min of daylight.

Average temperature
Summerdale, PA

Average temperature - Summerdale, PA

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (35.1°F).

The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).

Average pressure
Summerdale, PA

Average pressure - Summerdale, PA

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed
Summerdale, PA

Average wind speed - Summerdale, PA

The windiest month (with the highest average wind speed) is March (8.2mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).

Average humidity
Summerdale, PA

Average humidity - Summerdale, PA

The month with the highest relative humidity is February (80%).
The months with the lowest relative humidity are March and April (75%).

Average rainfall
Summerdale, PA

Average rainfall - Summerdale, PA

The wettest month (with the highest rainfall) is August (1.3").
The driest months (with the least rainfall) are January and February (0.71").

Average rainfall days
Summerdale, PA

Average rainfall days - Summerdale, PA

The month with the highest number of rainy days is May (13.9 days).
The month with the least rainy days is January (5.7 days).

Average snowfall
Summerdale, PA

Average snowfall - Summerdale, PA

The month with the highest snowfall is February (1.3").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days
Summerdale, PA

Average snowfall days - Summerdale, PA

The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight / Average sunshine
Summerdale, PA

Average daylight / Average sunshine - Summerdale, PA

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).

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

Average sunshine days
Summerdale, PA

Average sunshine days - Summerdale, PA

The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is July (14.1 days).

Average UV index
Summerdale, PA

Average UV index - Summerdale, PA

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

Average visibility
Summerdale, PA

Average visibility - Summerdale, PA

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).

Summerdale, Pennsylvania, USA

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