May weather forecastPetroleum, WV

May

Weather in May

May, the last month of the spring in Petroleum, is a moderately hot month, with an average temperature fluctuating between 73.9°F (23.3°C) and 52.9°F (11.6°C).

Temperature

May brings a temperature change, with average high-temperatures moving from April's comfortable 63.3°F (17.4°C) to a warm 73.9°F (23.3°C). During May, Petroleum experiences an average low-temperature of 52.9°F (11.6°C) at night.

Humidity

The average relative humidity in May is 79%.

Rainfall

May is the month with the most rainfall. Rain falls for 20.7 days and accumulates 4.13" (105mm) of precipitation.

Snowfall

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

Daylight

In May, the average length of the day is 14h and 20min.
On the first day of the month, sunrise is at 6:25 am and sunset at 8:18 pm. On the last day of May, in Petroleum, sunrise is at 6:00 am and sunset at 8:45 pm EDT.

Sunshine

In May, the average sunshine in Petroleum is 8.6h.

UV index

The average daily maximum UV index in May in Petroleum is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.
Note: In May, the maximum UV index of 5 translates into these guidelines:
Act with care - Obligation to protect against skin and eye damage is highlighted. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.

Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature during May is 73.9°F (23.3°C) and the low-temperature is 52.9°F (11.6°C).

The average relative humidity in May in Petroleum is 79%.

May is the month with the most rainfall in Petroleum, West Virginia. Rain falls for 20.7 days and accumulates 4.13" (105mm) of precipitation.

In Petroleum, West Virginia, during May, the rain falls for 20.7 days and regularly aggregates up to 4.13" (105mm) of precipitation.

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

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

In Petroleum, the average day length in May is 14h and 20min.

In May, on the first day of the month, sunrise is at 6:25 am and sunset at 8:18 pm. On the last day of the month, in Petroleum, West Virginia, sunrise is at 6:00 am and sunset at 8:45 pm EDT.

The average sunshine duration in May in Petroleum, West Virginia, is 8.6h.

The average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

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

Apr

May

Jun

Average high temperature

63.3°F

73.9°F

81.1°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

7mph

5.8mph

5.3mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

10.5

8.8

9.3

Average UV index

Average cloud cover

47%

39%

Average visibility

5mi

Average temperature in May
Petroleum, WV

Average high temperature in May: 73.9°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (36.7°F).

Average low temperature in May: 52.9°F

The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

Average pressure in May
Petroleum, WV

Average pressure in May: 30"Hg

The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

Average wind speed in May
Petroleum, WV

Average wind speed in May: 5.3mph

The windiest months (with the highest average wind speed) are January and February (6.6mph).
The calmest month (with the lowest average wind speed) is August (4mph).

Average humidity in May
Petroleum, WV

Average humidity in May: 79%

The months with the highest relative humidity are January and February (83%).
The months with the lowest relative humidity are June, July, August and November (77%).

Average rainfall in May
Petroleum, WV

Average rainfall in May: 4.13"

The wettest month (with the highest rainfall) is May (4.13").
The driest month (with the least rainfall) is September (2.13").

Average rainfall days in May
Petroleum, WV

Average rainfall days in May: 20.7 days

The month with the highest number of rainy days is May (20.7 days).
The month with the least rainy days is November (12.2 days).

Average snowfall in May
Petroleum, WV

Average snowfall in May: 0"

The month with the highest snowfall is January (5.87").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in May
Petroleum, WV

Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (15.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
Petroleum, WV

Average daylight in May: 14h and 18min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

Average sunshine in May: 8h and 36min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).

Average sunshine days in May
Petroleum, WV

Average sunshine days in May: 8.8 days

The month with the most sunshine days is November (15.5 days).
The month with the least sunshine days is February (8.2 days).

Average UV index in May
Petroleum, WV

Average UV index in May: 5

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