May weather forecast
Dayton, PA

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Weather in May

The last month of the spring, May, is an agreeable month in Dayton, Pennsylvania, with an average temperature fluctuating between 48.4°F (9.1°C) and 68.9°F (20.5°C).

Temperature

May's arrival brings a change in high-temperatures, moving from a refreshing 56.8°F (13.8°C) in April to a pleasant 68.9°F (20.5°C). Dayton's temperature drops to an average low of 48.4°F (9.1°C) during the nights of May.

Humidity

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

Rainfall

In May, in Dayton, the rain falls for 18 days. Throughout May, 2.36" (60mm) of precipitation is accumulated. Throughout the year, there are 151.9 rainfall days, and 22.13" (562mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.6 snowfall days, in May, Dayton aggregates 0.55" (14mm) of snow. In Dayton, Pennsylvania, during the entire year, snow falls for 71 days and aggregates up to 22.32" (567mm) of snow.

Daylight

The average length of the day in May is 14h and 29min.
On the first day of May, sunrise is at 6:14 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 8:42 pm EDT.

Sunshine

The average sunshine in May is 8.1h.

UV index

May through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 5 during May leads to these instructions:
Make use of precautions - Suggestions to resist sunburn are communicated. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Updated: Aug 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Dayton in May?

The high-temperature during May is 68.9°F (20.5°C) and the low-temperature is 48.4°F (9.1°C).

What is the average humidity in May?

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

How many days does it rain in May?

In Dayton, in May, during 18 rainfall days, 2.36" (60mm) of precipitation is typically accumulated.

What is the last month it snows?

May is the last month it regularly snows. During 0.6 snowfall days, in May, Dayton aggregates 0.55" (14mm) of snow.

What is the average length of the day in May?

In Dayton, the average day length in May is 14h and 29min.

When is the sunrise / sunset in May in Dayton?

On the first day of May, sunrise is at 6:14 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 8:42 pm EDT.

How many hours of sunshine does Dayton have in May?

In Dayton, Pennsylvania, the average sunshine duration in May is 8.1h.

What is the month with the highest UV index?

May through August, with an average maximum UV index of 5, are months with the highest UV index.

What is the UV index reading in May?

In Dayton, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's 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
Dayton, PA

Average temperature in May - Dayton, PA
  • Average high temperature in May: 68.9°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.4°F).

  • Average low temperature in May: 48.4°F

The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).

Average pressure in May
Dayton, PA

Average pressure in May - Dayton, PA
  • Average pressure in May: 30"Hg

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 in May
Dayton, PA

Average wind speed in May - Dayton, PA
  • Average wind speed in May: 7mph

The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

Average humidity in May
Dayton, PA

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

The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are June, July and August (78%).

Average rainfall in May
Dayton, PA

Average rainfall in May - Dayton, PA
  • Average rainfall in May: 2.36"

The wettest month (with the highest rainfall) is April (2.48").
The driest month (with the least rainfall) is November (1.26").

Average rainfall days in May
Dayton, PA

Average rainfall days in May - Dayton, PA
  • Average rainfall days in May: 18 days

The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (7.8 days).

Average snowfall in May
Dayton, PA

Average snowfall in May - Dayton, PA
  • Average snowfall in May: 0.55"

The month with the highest snowfall is January (5.63").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in May
Dayton, PA

Average snowfall days in May - Dayton, PA
  • Average snowfall days in May: 0.6 days

The month with the highest number of snowfall days is January (18.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in May / Average sunshine in May - Dayton, PA
  • Average daylight in May: 14h and 3min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in May: 8h and 1min

The months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).

Average sunshine days in May
Dayton, PA

Average sunshine days in May - Dayton, PA
  • Average sunshine days in May: 10.7 days

The month with the most sunshine days is September (15.3 days).
The month with the least sunshine days is February (7.8 days).

Average UV index in May
Dayton, PA

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

The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in May
Dayton, PA

Average cloud cover in May - Dayton, PA
  • Average cloud cover in May: 50

The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is August (Cloud cover 39).

Average visibility in May
Dayton, PA

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

The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).

Dayton, Pennsylvania, USA

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