Monthly weather forecast and climate
Helena, NY

January, like December, is a freezing cold winter month in Helena, New York, with average temperature fluctuating between 9.9°F (-12.3°C) and 23°F (-5°C). The coldest month is January, with an average high-temperature of 23°F (-5°C) and an average low-temperature of 9.9°F (-12.3°C). Weather in January »

February, the last month of the winter, in Helena, is also a subzero cold month, with average temperature fluctuating between 12.4°F (-10.9°C) and 25.5°F (-3.6°C). In Helena, the average high-temperature is almost the same as in January - a still subzero cold 25.5°F (-3.6°C). Weather in February »

The first month of the spring, March, is a wintry month in Helena, New York, with average temperature ranging between max 35.4°F (1.9°C) and min 22.5°F (-5.3°C). In Helena, New York, the average high-temperature increases, from a subzero cold 25.5°F (-3.6°C) in February, to a wintry 35.4°F (1.9°C). Weather in March »

April in Helena, New York, is a fresh spring month, with average temperature varying between 34.2°F (1.2°C) and 50.4°F (10.2°C). In April, the average high-temperature soars, from a wintry 35.4°F (1.9°C) in March, to a fresh 50.4°F (10.2°C). Weather in April »

The last month of the spring, May, is an enjoyable month in Helena, New York, with average temperature varying between 46°F (7.8°C) and 64.8°F (18.2°C). In May, the average high-temperature soars, from a cool 50.4°F (10.2°C) in April, to a comfortable 64.8°F (18.2°C). Weather in May »

June, the first month of the summer, in Helena, is a pleasant month, with average temperature ranging between max 71.1°F (21.7°C) and min 53.1°F (11.7°C). In Helena, the average high-temperature in June slightly increases, from an enjoyable 64.8°F (18.2°C) in May, to an agreeable 71.1°F (21.7°C). Weather in June »

July in Helena, New York, is a warm summer month, with average temperature fluctuating between 59.2°F (15.1°C) and 77.5°F (25.3°C). The warmest month is July, with an average high-temperature of 77.5°F (25.3°C) and an average low-temperature of 59.2°F (15.1°C). Weather in July »

August, the last month of the summer, in Helena, is another warm month, with average temperature varying between 57.9°F (14.4°C) and 75.9°F (24.4°C). In August, the average high-temperature is essentially the same as in July - a still warm 75.9°F (24.4°C). Weather in August »

The first month of the autumn, September, is also an agreeable month in Helena, New York, with temperature in the range of an average low of 50.9°F (10.5°C) and an average high of 69.3°F (20.7°C). In Helena, the average high-temperature marginally drops, from a moderately hot 75.9°F (24.4°C) in August, to a pleasant 69.3°F (20.7°C). Weather in September »

October, like September, is another mild autumn month in Helena, New York, with average temperature varying between 55.8°F (13.2°C) and 42.3°F (5.7°C). In Helena, the average high-temperature drops, from a pleasant 69.3°F (20.7°C) in September, to a mild 55.8°F (13.2°C). Weather in October »

The last month of the autumn, November, is another cold month in Helena, New York, with average temperature varying between 30°F (-1.1°C) and 42.1°F (5.6°C). In Helena, the average high-temperature in November decreases, from a mild 55.8°F (13.2°C) in October, to a cold 42.1°F (5.6°C). Weather in November »

December, the first month of the winter, in Helena, is also a subzero cold month, with temperature in the range of an average low of 19.4°F (-7°C) and an average high of 29.7°F (-1.3°C). In December, the average high-temperature decreases, from a wintry 42.1°F (5.6°C) in November, to a subzero cold 29.7°F (-1.3°C). Weather in December »

What is the coldest month in Helena?

The coldest month in Helena, New York, is January, with an average high-temperature of 23°F (-5°C) and an average low-temperature of 9.9°F (-12.3°C).

What are the most humid months in Helena?

Months with the highest humidity are January and February, with an average relative humidity of 90%.

How much does it rain in Helena?

Throughout the year, there are 160.1 rainfall days, and 29.76" (756mm) of precipitation is accumulated.

When does it snow in Helena?

January through May, October through December are months with snowfall in Helena.

How much does it snow in Helena?

Throughout the year, in Helena, there are 70.6 snowfall days, and 36.02" (915mm) of snow is accumulated.

When does it snow the most in Helena?

January is the month with the most snowfall in Helena. Snow falls for 16.5 days and accumulates 9.02" (229mm) of snow.

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

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

What is the month with the least sunshine in Helena?

With an average of 2.7h of sunshine, February has the least sunshine of the year in Helena, New York.

What is the least humid month in Helena?

The least humid month is April, with an average relative humidity of 77%.

When it does not snow in Helena?

In Helena, New York, snow does not fall in June through September.

When are the longest days in Helena?

The month with the longest days in Helena is June, with an average of 15.6h of daylight.

What is the warmest month in Helena?

July is the warmest month in Helena, with an average high-temperature of 77.5°F (25.3°C) and an average low-temperature of 59.2°F (15.1°C).

What month has the most sunshine in Helena?

July has the most sunshine of the year in Helena, with an average of 10.1h of sunshine.

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

July is the month with the highest UV index, with an average maximum UV index of 6.

What is the rainiest month in Helena?

The month with the most rainfall in Helena, New York, is August when the rain falls for 17.4 days and typically aggregates up to 3.23" (82mm) of precipitation.

What is the driest month in Helena?

The month with the least rainfall in Helena, New York, is September when the rain falls for 13.2 days and typically collects 2.01" (51mm) of precipitation.

What is the month with the shortest days in Helena?

The month with the shortest days in Helena is December, with an average of 8.8h of daylight.
Average pressure - Helena, NY

Months with the highest atmospheric pressure are March and November (30.06").
The month with the lowest atmospheric pressure is June (29.9").

Average wind speed - Helena, NY

The windiest month (with the highest average wind speed) is February (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).

Average humidity - Helena, NY
Average rainfall - Helena, NY

The wettest month (with the highest rainfall) is August (3.23").
The driest month (with the least rainfall) is September (2.01").

Average rainfall days - Helena, NY

The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is February (6.2 days).

Average snowfall - Helena, NY
Average snowfall days - Helena, NY

The month with the highest number of snowfall days is February (17.1 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine - Helena, NY

The month with the longest days is June (Average daylight: 15.6h).
The month with the shortest days is December (Average daylight: 8.8h).

The month with the most sunshine is July (Average sunshine: 10.1h).
The month with the least sunshine is February (Average sunshine: 2.7h).

Average sunshine days - Helena, NY
Average visibility - Helena, NY

Months with the highest visibility are April, May, June, July, September, October and November (6mi).
Months with the lowest visibility are January and February (4mi).