May weather forecastErie, PA

The somber town of Erie, Pennsylvania, from above on a cool and sunny day, with a clear view of the dark and calm water of Lake Erie in the back

May

Weather in May

Erie’s weather story takes an interesting turn in May. The city abandons its spring attire and begins donning the warm hues of summer. Coming from a relatively cooler April, residents experience an uplift in temperatures, laying the groundwork for the impending summer season. A further increase in temperatures is expected in June, establishing firm summer conditions in Erie. Pleasant weather enables a variety of outdoor activities, becoming a favorite time for picnics and other social events.

Temperature

May comes with an increase, with the average high-temperature moving from a chilly 48.7°F (9.3°C) in April to a mild 59.9°F (15.5°C). Throughout May, Erie encounters an average temperature drop to a frosty 48.7°F (9.3°C).

Humidity

The average relative humidity in May is 81%.

Rainfall

In Erie, Pennsylvania, in May, during 9.3 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. Throughout the year, there are 95.5 rainfall days, and 7.17" (182mm) of precipitation is accumulated.

Snowfall

January through May, November and December are months with snowfall in Erie. May is the last month it regularly snows. During 0.3 snowfall days, in May, Erie aggregates 0.04" (1mm) of snow. In Erie, during the entire year, snow falls for 28.4 days and aggregates up to 1.85" (47mm) of snow.

Ocean temperature

In May, the average ocean temperature is 47.3°F (8.5°C).
Note: Entering waters of 47.3°F (8.5°C) is life-endangering. A mere moment in 55.4°F (13°C) waters feels piercing cold, and below 50°F (10°C) it can lead to immediate cold shock and cessation of breathing control, depending on body resilience.

Daylight

The average length of the day in May is 14h and 35min.
On the first day of the month, sunrise is at 6:14 am and sunset at 8:19 pm. On the last day of May, sunrise is at 5:46 am and sunset at 8:49 pm EDT.

Sunshine

The average sunshine in May is 9h.

UV index

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 exposure to the Sun's UV rays for the ordinary person.
Note: In May, the maximum UV index of 5 translates into these guidelines:
Make use of precautions - Suggestions to resist sunburn are communicated. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.

Updated: Aug 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

An average high-temperature, in May, in Erie, is 59.9°F (15.5°C) and the average low-temperature is 48.7°F (9.3°C).

The average relative humidity in May is 81%.

In Erie, in May, it is raining for 9.3 days, with typically 0.67" (17mm) of accumulated precipitation.

May is the last month it regularly snows. During 0.3 snowfall days, in May, Erie aggregates 0.04" (1mm) of snow.

In Erie, in May, the average water temperature is 47.3°F (8.5°C). Swimming in 47.3°F (8.5°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

The average day length in May in Erie is 14h and 35min.

On the first day of May, sunrise is at 6:14 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 8:49 pm EDT.

The average sunshine duration in May is 9h.

In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to 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

48.7°F

59.9°F

68.7°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

11.7mph

9.6mph

9.2mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

1.1

0.3

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

18.6

18.3

16.8

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Erie, PA

Average high temperature in May: 59.9°F

The warmest month (with the highest average high temperature) is July (74.8°F).
The month with the lowest average high temperature is January (29.8°F).

Average low temperature in May: 48.7°F

The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

Average pressure in May
Erie, PA

Average pressure in May: 29.99"Hg

The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in May
Erie, PA

Average wind speed in May: 8.8mph

The windiest month (with the highest average wind speed) is January (13.5mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).

Average humidity in May
Erie, PA

Average humidity in May: 81%

The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are August, September, October and November (78%).

Average rainfall in May
Erie, PA

Average rainfall in May: 0.67"

The wettest month (with the highest rainfall) is October (0.83").
The driest month (with the least rainfall) is September (0.35").

Average rainfall days in May
Erie, PA

Average rainfall days in May: 9.3 days

The month with the highest number of rainy days is August (11.7 days).
The month with the least rainy days is January (4 days).

Average snowfall in May
Erie, PA

Average snowfall in May: 0.04"

The month with the highest snowfall is February (0.71").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in May
Erie, PA

Average snowfall days in May: 0.3 days

The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average sea temperature in May
Erie, PA

Average sea temperature in May: 47.2°F

The best month for swimming (with the highest average sea temperature) is August (75.1°F).
The coldest month (with the lowest average sea temperature) is February (32.5°F).

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

Average daylight in May: 14h and 36min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

Average sunshine in May: 9h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).

Average sunshine days in May
Erie, PA

Average sunshine days in May: 18.3 days

The month with the most sunshine days is March (21.3 days).
The month with the least sunshine days is August (16.3 days).

Average UV index in May
Erie, PA

Average UV index in May: 5

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in May
Erie, PA

Average cloud cover in May: 40

The month with the most cloud cover is January (Cloud cover 76).
The months with the least cloud cover are July and August (Cloud cover 28).

Average visibility in May
Erie, PA

Average visibility in May: 6mi

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