Monthly weather forecast and climate
Olean, NY

January, the same as December, in Olean, New York, is another subzero cold winter month, with average temperature ranging between max 27.9°F (-2.3°C) and min 15.8°F (-9°C). The coldest month is January, with an average high-temperature of 27.9°F (-2.3°C) and an average low-temperature of 15.8°F (-9°C). Weather in January »

February, the last month of the winter, in Olean, is also a subzero cold month, with average temperature fluctuating between 30.7°F (-0.7°C) and 17.6°F (-8°C). In February, the average high-temperature is almost the same as in January - a still freezing cold 30.7°F (-0.7°C). Weather in February »

March, the first month of the spring, in Olean, is a wintry month, with temperature in the range of an average high of 40.1°F (4.5°C) and an average low of 24.4°F (-4.2°C). In Olean, the average high-temperature in March increases, from a freezing cold 30.7°F (-0.7°C) in February, to a cold 40.1°F (4.5°C). Weather in March »

April in Olean, New York, is a fresh spring month, with temperature in the range of an average low of 34.3°F (1.3°C) and an average high of 52.5°F (11.4°C). In Olean, the average high-temperature rises, from a wintry 40.1°F (4.5°C) in March, to a cool 52.5°F (11.4°C). Weather in April »

May, the last month of the spring, in Olean, is an enjoyable month, with average temperature ranging between max 66°F (18.9°C) and min 45.1°F (7.3°C). In Olean, New York, the average high-temperature in May increases, from a fresh 52.5°F (11.4°C) in April, to a comfortable 66°F (18.9°C). Weather in May »

The first month of the summer, June, is a pleasant month in Olean, New York, with average temperature fluctuating between 51.8°F (11°C) and 73°F (22.8°C). In Olean, the average high-temperature in June slightly increases, from an enjoyable 66°F (18.9°C) in May, to a pleasant 73°F (22.8°C). Weather in June »

July in Olean, New York, is a moderately hot summer month, with average temperature fluctuating between 78.4°F (25.8°C) and 55.9°F (13.3°C). July is the warmest month, with an average high-temperature of 78.4°F (25.8°C) and an average low-temperature of 55.9°F (13.3°C). Weather in July »

August, the last month of the summer, in Olean, is another warm month, with average temperature fluctuating between 54.5°F (12.5°C) and 76.3°F (24.6°C). In Olean, the average high-temperature is almost the same as in July - a still moderately hot 76.3°F (24.6°C). Weather in August »

The first month of the autumn, September, is also an agreeable month in Olean, New York, with temperature in the range of an average low of 49.5°F (9.7°C) and an average high of 69.6°F (20.9°C). In September, the average high-temperature marginally drops, from a warm 76.3°F (24.6°C) in August, to a pleasant 69.6°F (20.9°C). Weather in September »

October, the same as September, in Olean, New York, is another mild autumn month, with average temperature fluctuating between 56.7°F (13.7°C) and 41.2°F (5.1°C). In October, the average high-temperature decreases, from a pleasant 69.6°F (20.9°C) in September, to a moderate 56.7°F (13.7°C). Weather in October »

November, the last month of the autumn, in Olean, is also a frosty month, with average temperature ranging between max 43.5°F (6.4°C) and min 30°F (-1.1°C). In Olean, New York, the average high-temperature decreases, from a moderate 56.7°F (13.7°C) in October, to a chilly 43.5°F (6.4°C). Weather in November »

The first month of the winter, December, is also a wintry month in Olean, New York, with average temperature varying between 33.8°F (1°C) and 23.9°F (-4.5°C). In December, the average high-temperature drops, from a chilly 43.5°F (6.4°C) in November, to a wintry 33.8°F (1°C). Weather in December »

What is the coldest month in Olean?

January is the coldest month in Olean, New York, with an average high-temperature of 27.9°F (-2.3°C) and an average low-temperature of 15.8°F (-9°C).

What is the most humid month in Olean?

Months with the highest humidity are January and February, with an average relative humidity of 89%.

How much does it rain in Olean?

Throughout the year, in Olean, there are 168.9 rainfall days, and 30" (762mm) of precipitation is accumulated.

When does it snow in Olean?

Months with snowfall in Olean are January through May, October through December.

How many days does it snow in Olean?

Throughout the year, in Olean, there are 92.6 snowfall days, and 43.58" (1107mm) of snow is accumulated.

What is the month with the least sunshine in Olean?

January has the least sunshine of the year, with an average of 2.3h of sunshine.

What are the months with the lowest UV index in Olean?

January, February and December, with an average maximum UV index of 1, are months with the lowest UV index.

When does it snow the most in Olean?

February is the month with the most snowfall in Olean, New York. Snow falls for 19 days and accumulates 10.63" (270mm) of snow.

What is the rainiest month in Olean?

The month with the most rainfall is April when the rain falls for 16.6 days and typically aggregates up to 3.35" (85mm) of precipitation.

What is the least humid month in Olean?

Months with the lowest humidity are May through July, with an average relative humidity of 79%.

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

Months with the highest UV index are May through August, with an average maximum UV index of 5.

When it does not snow in Olean?

June through September are months without snowfall.

When are the longest days in Olean?

With an average of 15.2h of daylight, June has the longest days of the year.

What is the warmest month in Olean?

The warmest month is July, with an average high-temperature of 78.4°F (25.8°C) and an average low-temperature of 55.9°F (13.3°C).

What month has the most sunshine in Olean?

The month with the most sunshine in Olean, New York, is July, with an average of 9.4h of sunshine.

What is the driest month in Olean?

September is the month with the least rainfall in Olean. Rain falls for 15.4 days and accumulates 1.93" (49mm) of precipitation.

What is the month with the shortest days in Olean?

The month with the shortest days in Olean, New York, is December, with an average of 9.2h of daylight.
Average pressure - Olean, NY

The month with the highest atmospheric pressure is November (30.11").
The month with the lowest atmospheric pressure is June (29.94").

Average wind speed - Olean, NY

The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).

Average humidity - Olean, NY
Average rainfall - Olean, NY

The wettest month (with the highest rainfall) is April (3.35").
The driest month (with the least rainfall) is September (1.93").

Average rainfall days - Olean, NY

The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is January (6.8 days).

Average snowfall - Olean, NY
Average snowfall days - Olean, NY

The month with the highest number of snowfall days is January (20.2 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine - Olean, NY

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

The month with the most sunshine is July (Average sunshine: 9.4h).
The month with the least sunshine is January (Average sunshine: 2.3h).

Average sunshine days - Olean, NY

The month with the most sunshine days is September (12.4 days).
The month with the least sunshine days is February (5.9 days).

Average UV index - Olean, NY
Average visibility - Olean, NY

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