Climate and monthly weather forecast
Keystone, West VA

Weather in January

January, the same as December, is another cold winter month in Keystone, West Virginia, with average temperature varying between 25°F (-3.9°C) and 39.2°F (4°C). January is the coldest month, with an average high-temperature of 39.2°F (4°C) and an average low-temperature of 25°F (-3.9°C). Weather in January »

Weather in February

The last month of the winter, February, is a chilly month in Keystone, West Virginia, with average temperature fluctuating between 28.2°F (-2.1°C) and 43.9°F (6.6°C). In February, the average high-temperature is essentially the same as in January - a frosty 43.9°F (6.6°C). Weather in February »

Weather in March

March, the first month of the spring, in Keystone, is a cool month, with temperature in the range of an average low of 35.1°F (1.7°C) and an average high of 51.8°F (11°C). In Keystone, the average high-temperature marginally rises, from a frosty 43.9°F (6.6°C) in February, to a cool 51.8°F (11°C). Weather in March »

Weather in April

April is a comfortable spring month in Keystone, West Virginia, with average temperature fluctuating between 63.7°F (17.6°C) and 43.9°F (6.6°C). In April, the average high-temperature increases, from a fresh 51.8°F (11°C) in March, to an enjoyable 63.7°F (17.6°C). Weather in April »

Weather in May

May, the last month of the spring, in Keystone, is an agreeable month, with average temperature fluctuating between 52.2°F (11.2°C) and 72.9°F (22.7°C). In Keystone, West Virginia, the average high-temperature in May rises, from an enjoyable 63.7°F (17.6°C) in April, to a pleasant 72.9°F (22.7°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Keystone, West Virginia, with average temperature ranging between max 80.2°F (26.8°C) and min 57°F (13.9°C). In June, the average high-temperature slightly increases, from a pleasant 72.9°F (22.7°C) in May, to a warm 80.2°F (26.8°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Keystone, West Virginia, with temperature in the range of an average low of 60.3°F (15.7°C) and an average high of 83.5°F (28.6°C). July is the warmest month, with an average high-temperature of 83.5°F (28.6°C) and an average low-temperature of 60.3°F (15.7°C). The average heat index is estimated at a tropical 91.2°F (32.9°C). Weather in July »

Weather in August

August, the last month of the summer, in Keystone, is another warm month, with average temperature fluctuating between 58.5°F (14.7°C) and 82°F (27.8°C). In Keystone, the average high-temperature is essentially the same as in July - a still moderately hot 82°F (27.8°C). Weather in August »

Weather in September

September, the first month of the autumn, in Keystone, is still a warm month, with average temperature fluctuating between 76.3°F (24.6°C) and 54.1°F (12.3°C). In September, the average high-temperature marginally drops, from 82°F (27.8°C) in August, to a still warm 76.3°F (24.6°C). Weather in September »

Weather in October

October, like September, in Keystone, West Virginia, is another comfortable autumn month, with average temperature ranging between max 64.2°F (17.9°C) and min 45.1°F (7.3°C). In October, the average high-temperature decreases, from a warm 76.3°F (24.6°C) in September, to an enjoyable 64.2°F (17.9°C). Weather in October »

Weather in November

November, the last month of the autumn, in Keystone, is also a fresh month, with average temperature ranging between min 34.9°F (1.6°C) and max 52.5°F (11.4°C). In Keystone, the average high-temperature drops, from an enjoyable 64.2°F (17.9°C) in October, to a cool 52.5°F (11.4°C). Weather in November »

Weather in December

December, the first month of the winter, in Keystone, is also a frosty month, with average temperature fluctuating between 44.4°F (6.9°C) and 31.1°F (-0.5°C). In Keystone, West Virginia, the average high-temperature marginally drops, from a fresh 52.5°F (11.4°C) in November, to a chilly 44.4°F (6.9°C). Weather in December »
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FAQ

What is the coldest month in Keystone?

January is the coldest month in Keystone, West Virginia, with an average high-temperature of 39.2°F (4°C) and an average low-temperature of 25°F (-3.9°C).

How much does it rain in Keystone?

Throughout the year, in Keystone, there are 172.5 rainfall days, and 29.41" (747mm) of precipitation is accumulated.

When does it snow in Keystone?

Months with snowfall in Keystone, West Virginia, are January through May, October through December.

How much does it snow in Keystone?

In Keystone, during the entire year, snow falls for 38.6 days, and aggregates up to 20" (508mm) of snow.

What is the month with the least sunshine in Keystone?

The month with the least sunshine in Keystone, West Virginia, is January, with an average of 4.2h of sunshine.

When is the lowest UV index in Keystone?

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Keystone.

What is the most humid month in Keystone?

February is the most humid month, with an average relative humidity of 82%.

What is the rainiest month in Keystone?

May is the month with the most rainfall. Rain falls for 19.7 days and accumulates 3.19" (81mm) of precipitation.

When it does not snow in Keystone?

June through September are months without snowfall in Keystone, West Virginia.

When are the longest days in Keystone?

June has the longest days of the year in Keystone, West Virginia, with an average of 14.7h of daylight.

What is the month with the highest UV index in Keystone?

Months with the highest UV index in Keystone, West Virginia, are June and August, with an average maximum UV index of 6.

What is the warmest month in Keystone?

The warmest month is July, with an average high-temperature of 83.5°F (28.6°C) and an average low-temperature of 60.3°F (15.7°C).

What are the least humid months in Keystone?

July, August and November, with an average relative humidity of 76%, are the least humid months in Keystone, West Virginia.

What month has the most sunshine in Keystone?

The month with the most sunshine in Keystone, West Virginia, is August, with an average of 10.1h of sunshine.

What is the driest month in Keystone?

The month with the least rainfall in Keystone is September when the rain falls for 15.2 days and typically collects 1.54" (39mm) of precipitation.

When does it snow the most in Keystone?

The month with the most snowfall is December when snow falls for 7.8 days and typically aggregates up to 4.41" (112mm) of snow.

What is the month with the shortest days in Keystone?

The month with the shortest days in Keystone, West Virginia, is December, with an average of 9.6h of daylight.

Average temperature
Keystone, West VA

Average temperature - Keystone, West VA

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (39.2°F).

The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (25°F).

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Average pressure
Keystone, West VA

Average pressure - Keystone, West VA

The month with the highest atmospheric pressure is November (30.16").
The month with the lowest atmospheric pressure is June (29.99").

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Average wind speed
Keystone, West VA

Average wind speed - Keystone, West VA

The windiest month (with the highest average wind speed) is January (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).

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Average humidity
Keystone, West VA

Average humidity - Keystone, West VA

The month with the highest relative humidity is February (82%).
Months with the lowest relative humidity are July, August and November (76%).

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Average rainfall
Keystone, West VA

Average rainfall - Keystone, West VA

The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is September (1.54").

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Average rainfall days
Keystone, West VA

Average rainfall days - Keystone, West VA

The month with the highest number of rainy days is May (19.7 days).
Months with the least rainy days are January and November (10.1 days).

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Average snowfall
Keystone, West VA

Average snowfall - Keystone, West VA

The month with the highest snowfall is December (4.41").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Keystone, West VA

Average snowfall days - Keystone, West VA

The month with the highest number of snowfall days is January (10.5 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Keystone, West VA

Average daylight / Average sunshine - Keystone, West VA

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

The month with the most sunshine is August (Average sunshine: 10.1h).
The month with the least sunshine is January (Average sunshine: 4.2h).

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Average sunshine days
Keystone, West VA

Average sunshine days - Keystone, West VA

The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is May (9.2 days).

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Average UV index
Keystone, West VA

Average UV index - Keystone, West VA

Months with the highest UV index are June and August (UV index 6).
Months with the lowest UV index are January, February and December (UV index 2).

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Average visibility
Keystone, West VA

Average visibility - Keystone, West VA

Months with the highest visibility are April and November (6mi).
Months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).

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