May weather forecastRochester, PA

May

Weather in May

The last month of the spring, May, is an agreeable month in Rochester, Pennsylvania, with an average temperature ranging between max 71.2°F (21.8°C) and min 50.2°F (10.1°C).

Temperature

The transition to May introduces an increase in the average high-temperature, shifting from a mild 59.5°F (15.3°C) in April to a pleasant 71.2°F (21.8°C). Rochester experiences a mean temperature of 50.2°F (10.1°C) during May nights.

Humidity

In May, the average relative humidity is 78%.

Rainfall

In Rochester, in May, it is raining for 18.1 days, with typically 2.2" (56mm) of accumulated precipitation. In Rochester, during the entire year, the rain falls for 168.7 days and collects up to 21.22" (539mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

In May, the average length of the day in Rochester is 14h and 28min.
On the first day of May, sunrise is at 6:18 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 5:52 am and sunset at 8:45 pm EDT.

Sunshine

The average sunshine in May is 8.8h.

UV index

In Rochester, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.
Note: In May, the maximum UV index of 5 suggests these recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.

Updated: Aug 6, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The average high-temperature and low-temperature during May are 71.2°F (21.8°C) and 50.2°F (10.1°C) respectively.

The average relative humidity in May is 78%.

In Rochester, during May, the rain falls for 18.1 days and regularly aggregates up to 2.2" (56mm) of precipitation.

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

In May, it doesn't snow. April is the latest month when it typically snows.

The average day length in May is 14h and 28min.

In May, on the first day of the month, sunrise is at 6:18 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 5:52 am and sunset at 8:45 pm EDT.

The average sunshine duration in May is 8.8h.

In Rochester, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A May J J A S O N D

Apr

May

Jun

Average high temperature

59.5°F

71.2°F

78.3°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

8mph

6.6mph

6.2mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

10.8

10.5

11.3

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Rochester, PA

Average high temperature in May: 71.2°F

The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (32.5°F).

Average low temperature in May: 50.2°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

Average pressure in May
Rochester, PA

Average pressure in May: 29.99"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).

Average wind speed in May
Rochester, PA

Average wind speed in May: 6.1mph

The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).

Average humidity in May
Rochester, PA

Average humidity in May: 78%

The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April, July and August (77%).

Average rainfall in May
Rochester, PA

Average rainfall in May: 2.2"

The wettest month (with the highest rainfall) is June (2.32").
The driest month (with the least rainfall) is November (1.1").

Average rainfall days in May
Rochester, PA

Average rainfall days in May: 18.1 days

The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is January (10 days).

Average snowfall in May
Rochester, PA

Average snowfall in May: 0"

The month with the highest snowfall is January (3.11").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in May
Rochester, PA

Average snowfall days in May: 0.2 days

The month with the highest number of snowfall days is January (17.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in May: 14h and 30min

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 18min).

Average sunshine in May: 8h and 48min

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).