May weather forecast
Chambersburg, PA

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Weather in May

May brings an important climatic transition in Chambersburg, Pennsylvania, characterized by much warmer weather. The environment feels entirely different compared to the cooler months, with temperature increasing to 71.1°F (21.7°C). The lovely Pennsylvania town begins to showcase its summer radiance in May. The town is lush and green, enriched by the preceding rains. However, the wind speed diminishes compared to the windy winters, contributing to the warm and calm atmosphere.

Temperature

The average high-temperature in Chambersburg increases in May, moving from a refreshing 60.4°F (15.8°C) in April to an agreeable 71.1°F (21.7°C). Throughout the nights in May, an average low-temperature of 51.6°F (10.9°C) is noted in Chambersburg.

Humidity

In May, the average relative humidity is 79%.

Rainfall

The month with the most rainfall in Chambersburg is May, when the rain falls for 17.3 days and typically aggregates up to 2.95" (75mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Chambersburg. May is the last month it regularly snows in Chambersburg. During 0.1 snowfall days, in May, Chambersburg aggregates 0.12" (3mm) of snow. In Chambersburg, during the entire year, snow falls for 28.8 days and aggregates up to 15.39" (391mm) of snow.

Daylight

In May, the average length of the day in Chambersburg, Pennsylvania, is 14h and 24min.
On the first day of May in Chambersburg, sunrise is at 6:09 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 8:32 pm EDT.

Sunshine

In Chambersburg, the average sunshine in May is 8.3h.

UV index

In Chambersburg, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high daily UV index of 5 during May translates into the following directions:
Undertake precautions - Guarding against sun damage is counselled. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
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Frequently asked questions

What is the usual temperature for Chambersburg in May?

The high-temperature, in May, in Chambersburg, is 71.1°F (21.7°C), while the low-temperature averages to 51.6°F (10.9°C).

What is the average humidity in May in Chambersburg?

In May, the average relative humidity in Chambersburg is 79%.

What is the wettest month in Chambersburg?

May is the month with the most rainfall in Chambersburg. Rain falls for 17.3 days and accumulates 2.95" (75mm) of precipitation.

How many days does it rain in May in Chambersburg?

In Chambersburg, Pennsylvania, during May, the rain falls for 17.3 days and regularly aggregates up to 2.95" (75mm) of precipitation.

What is the last month it snows in Chambersburg?

May is the last month it regularly snows in Chambersburg. During 0.1 snowfall days, in May, Chambersburg aggregates 0.12" (3mm) of snow.

What is the average length of the day in May in Chambersburg?

In Chambersburg, Pennsylvania, the average day length in May is 14h and 24min.

What time are sunrise and sunset in May in Chambersburg?

In May, on the first day of the month, sunrise is at 6:09 am and sunset at 8:05 pm. On the last day of the month, in Chambersburg, sunrise is at 5:44 am and sunset at 8:32 pm EDT.

How many hours of sunshine does Chambersburg have in May?

In May, the average sunshine duration in Chambersburg is 8.3h.

What is the UV index reading in May in Chambersburg?

The average daily maximum UV index in May in Chambersburg, Pennsylvania, is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Chambersburg, PA

Average temperature in May - Chambersburg, PA
  • Average high temperature in May: 71.1°F

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).

  • Average low temperature in May: 51.6°F

The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).

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Average pressure in May
Chambersburg, PA

Average pressure in May - Chambersburg, PA
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed in May
Chambersburg, PA

Average wind speed in May - Chambersburg, PA
  • Average wind speed in May: 5.9mph

The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

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Average humidity in May
Chambersburg, PA

Average humidity in May - Chambersburg, PA
  • Average humidity in May: 79%

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

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Average rainfall in May
Chambersburg, PA

Average rainfall in May - Chambersburg, PA
  • Average rainfall in May: 2.95"

The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is January (1.85").

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Average rainfall days in May
Chambersburg, PA

Average rainfall days in May - Chambersburg, PA
  • Average rainfall days in May: 17.3 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (7.3 days).

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Average snowfall in May
Chambersburg, PA

Average snowfall in May - Chambersburg, PA
  • Average snowfall in May: 0.12"

The month with the highest snowfall is January (4.92").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Chambersburg, PA

Average snowfall days in May - Chambersburg, PA
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is January (8.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Chambersburg, PA

Average daylight in May / Average sunshine in May - Chambersburg, PA
  • Average daylight in May: 14h 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 May: 8h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).

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Average sunshine days in May
Chambersburg, PA

Average sunshine days in May - Chambersburg, PA
  • Average sunshine days in May: 11.6 days

The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (11.6 days).

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Average UV index in May
Chambersburg, PA

Average UV index in May - Chambersburg, PA
  • Average UV index in May: 5

The months with the highest UV index are June and July (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 May
Chambersburg, PA

Average cloud cover in May - Chambersburg, PA
  • Average cloud cover in May: 48

The months with the most cloud cover are January, February and December (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 33).

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Average visibility in May
Chambersburg, PA

Average visibility in May - Chambersburg, PA
  • Average visibility in May: 5mi

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

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Chambersburg, Pennsylvania, USA

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