May weather forecast
Petroleum, OH

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Weather in May

May, the last month of the spring in Petroleum, is an agreeable month, with an average temperature ranging between min 49.3°F (9.6°C) and max 70°F (21.1°C).

Temperature

May's arrival is marked by an increase in the average high-temperature, moving from a moderate 57.6°F (14.2°C) in April to an agreeable 70°F (21.1°C). May nights observe an average temperature dip to a frosty 49.3°F (9.6°C).

Humidity

May, July and August, with an average relative humidity of 78%, are the least humid months in Petroleum.

Rainfall

In May, in Petroleum, Ohio, the rain falls for 19.5 days. Throughout May, 3.31" (84mm) of precipitation is accumulated. In Petroleum, Ohio, during the entire year, the rain falls for 182.1 days and collects up to 34.8" (884mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows in Petroleum. During 0.4 snowfall days, in May, Petroleum aggregates 0.16" (4mm) of snow. In Petroleum, during the entire year, snow falls for 76.4 days and aggregates up to 31.69" (805mm) of snow.

Daylight

In May, the average length of the day is 14h and 31min.
On the first day of the month, sunrise is at 6:18 am and sunset at 8:19 pm. On the last day of May, sunrise is at 5:51 am and sunset at 8:48 pm EDT.

Sunshine

The average sunshine in May in Petroleum is 8.6h.

UV index

In Petroleum, Ohio, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.
Note: A maximum high daily UV index of 5 during May translates into the following directions:
Guard yourself - An obligation to protect skin and eyes from harm exists. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
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Frequently asked questions

What is the average May temperature in Petroleum?

The high-temperature in Petroleum during May is 70°F (21.1°C) and the low-temperature is 49.3°F (9.6°C).

What is the least humid month in Petroleum?

The months with the lowest humidity in Petroleum, Ohio, are May, July and August, with an average relative humidity of 78%.

What is the average humidity in May in Petroleum?

The average relative humidity in May is 78%.

How much does it rain in Petroleum in May?

In Petroleum, in May, it is raining for 19.5 days, with typically 3.31" (84mm) of accumulated precipitation.

What is the last month it snows in Petroleum?

May is the last month it regularly snows in Petroleum. During 0.4 snowfall days, in May, Petroleum aggregates 0.16" (4mm) of snow.

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

In May, the average day length in Petroleum, Ohio, is 14h and 31min.

When is the sunrise / sunset in May in Petroleum?

In May, on the first day of the month, sunrise is at 6:18 am and sunset at 8:19 pm. On the last day of the month, in Petroleum, sunrise is at 5:51 am and sunset at 8:48 pm EDT.

How many hours of sunshine does Petroleum have in May?

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

How high is the UV index in May in Petroleum?

The average daily maximum UV index in May in Petroleum, Ohio, is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
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
Petroleum, OH

Average temperature in May - Petroleum, OH
  • Average high temperature in May: 70°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.1°F).

  • Average low temperature in May: 49.3°F

The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).

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Average pressure in May
Petroleum, OH

Average pressure in May - Petroleum, OH
  • Average pressure in May: 29.99"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in May
Petroleum, OH

Average wind speed in May - Petroleum, OH
  • Average wind speed in May: 6.3mph

The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest month (with the lowest average wind speed) is July (5mph).

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Average humidity in May
Petroleum, OH

Average humidity in May - Petroleum, OH
  • Average humidity in May: 78%

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

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Average rainfall in May
Petroleum, OH

Average rainfall in May - Petroleum, OH
  • Average rainfall in May: 3.31"

The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is September (2.2").

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Average rainfall days in May
Petroleum, OH

Average rainfall days in May - Petroleum, OH
  • Average rainfall days in May: 19.5 days

The month with the highest number of rainy days is May (19.5 days).
The month with the least rainy days is January (9.3 days).

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Average snowfall in May
Petroleum, OH

Average snowfall in May - Petroleum, OH
  • Average snowfall in May: 0.16"

The month with the highest snowfall is January (8.62").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Petroleum, OH

Average snowfall days in May - Petroleum, OH
  • Average snowfall days in May: 0.4 days

The month with the highest number of snowfall days is January (20.3 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
Petroleum, OH

Average daylight in May / Average sunshine in May - Petroleum, OH
  • 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 4min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).

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Average sunshine days in May
Petroleum, OH

Average sunshine days in May - Petroleum, OH
  • Average sunshine days in May: 10.1 days

The month with the most sunshine days is September (12.7 days).
The month with the least sunshine days is February (6 days).

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Average UV index in May
Petroleum, OH

Average UV index in May - Petroleum, OH
  • Average UV index in May: 5

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

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Average cloud cover in May
Petroleum, OH

Average cloud cover in May - Petroleum, OH
  • Average cloud cover in May: 46

The month with the most cloud cover is January (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 35).

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Average visibility in May
Petroleum, OH

Average visibility in May - Petroleum, OH
  • Average visibility in May: 5mi

The months with the highest visibility are March, April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February and December (4mi).

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Petroleum, Ohio, USA

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