Monthly weather forecast and climate
East Helena, MT

January, like December, is a freezing cold winter month in East Helena, Montana, with average temperature fluctuating between 16°F (-8.9°C) and 30.4°F (-0.9°C). In January, the average high-temperature is relatively the same as in December - a still subzero cold 30.4°F (-0.9°C). Weather in January »

The last month of the winter, February, is also a subzero cold month in East Helena, Montana, with average temperature ranging between max 29.7°F (-1.3°C) and min 14.7°F (-9.6°C). In February, the average high-temperature is practically the same as in January - a still freezing cold 29.7°F (-1.3°C). Weather in February »

The first month of the spring, March, is a cold month in East Helena, Montana, with average temperature varying between 39.7°F (4.3°C) and 23.2°F (-4.9°C). In East Helena, Montana, the average high-temperature rises, from a subzero cold 29.7°F (-1.3°C) in February, to a wintry 39.7°F (4.3°C). Weather in March »

April in East Helena, Montana, is a chilly spring month, with average temperature varying between 47.8°F (8.8°C) and 28.8°F (-1.8°C). In April, the average high-temperature slightly increases, from a cold 39.7°F (4.3°C) in March, to a chilly 47.8°F (8.8°C). Weather in April »

The last month of the spring, May, is a moderate month in East Helena, Montana, with average temperature fluctuating between 59.4°F (15.2°C) and 36.9°F (2.7°C). In May, the average high-temperature rises, from a chilly 47.8°F (8.8°C) in April, to a mild 59.4°F (15.2°C). Weather in May »

The first month of the summer, June, is an agreeable month in East Helena, Montana, with average temperature fluctuating between 44.2°F (6.8°C) and 69.4°F (20.8°C). In June, the average high-temperature rises, from a moderate 59.4°F (15.2°C) in May, to a pleasant 69.4°F (20.8°C). Weather in June »

July is a warm summer month in East Helena, Montana, with temperature in the range of an average high of 80.2°F (26.8°C) and an average low of 50.4°F (10.2°C). With an average high-temperature of 80.2°F (26.8°C) and an average low-temperature of 50.4°F (10.2°C), July is the warmest month. Weather in July »

The last month of the summer, August, is another warm month in East Helena, Montana, with average temperature varying between 78.1°F (25.6°C) and 50.2°F (10.1°C). In August, the average high-temperature is relatively the same as in July - a still warm 78.1°F (25.6°C). Weather in August »

September, the first month of the autumn, in East Helena, is also an agreeable month, with average temperature varying between 43.9°F (6.6°C) and 68.2°F (20.1°C). In September, the average high-temperature decreases, from a moderately hot 78.1°F (25.6°C) in August, to a pleasant 68.2°F (20.1°C). Weather in September »

October, like September, in East Helena, Montana, is a cool autumn month, with average temperature fluctuating between 32.7°F (0.4°C) and 51.3°F (10.7°C). In October, the average high-temperature significantly decreases, from an agreeable 68.2°F (20.1°C) in September, to a cool 51.3°F (10.7°C). Weather in October »

The last month of the autumn, November, is also a wintry month in East Helena, Montana, with average temperature fluctuating between 37.4°F (3°C) and 22.1°F (-5.5°C). In November, the average high-temperature drops, from a cool 51.3°F (10.7°C) in October, to a cold 37.4°F (3°C). Weather in November »

The first month of the winter, December, is also a subzero cold month in East Helena, Montana, with average temperature varying between 27.7°F (-2.4°C) and 14.2°F (-9.9°C). With an average high-temperature of 27.7°F (-2.4°C) and an average low-temperature of 14.2°F (-9.9°C), December is the coldest month. Weather in December »

What is the most humid month in East Helena?

With an average relative humidity of 85%, January is the most humid month.

How many days does it rain in East Helena?

Throughout the year, in East Helena, Montana, there are 123.7 rainfall days, and 12.4" (315mm) of precipitation is accumulated.

What is the driest month in East Helena?

Months with the least rainfall in East Helena are January and December Rain falls for 8.4 days and accumulates 0.63" (16mm) of rain.

When does it snow in East Helena?

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

How much does it snow in East Helena?

In East Helena, during the entire year, snow falls for 80.4 days, and aggregates up to 34.88" (886mm) of snow.

What is the month with the least sunshine in East Helena?

January has the least sunshine of the year in East Helena, with an average of 5.6h of sunshine.

What is the snowiest month in East Helena?

February is the month with the most snowfall in East Helena. Snow falls for 16.2 days and accumulates 6.18" (157mm) of snow.

What is the month with the lowest UV index in East Helena?

The month with the lowest UV index in East Helena, Montana, is February, with an average maximum UV index of 1.

What is the wettest month in East Helena?

June is the month with the most rainfall. Rain falls for 13.3 days and accumulates 2.01" (51mm) of precipitation.

When it does not snow in East Helena?

In East Helena snow does not fall in June through August.

When are the longest days in East Helena?

June has the longest days of the year in East Helena, Montana, with an average of 15.8h of daylight.

What is the warmest month in East Helena?

The warmest month in East Helena is July, with an average high-temperature of 80.2°F (26.8°C) and an average low-temperature of 50.4°F (10.2°C).

What is the least humid month in East Helena?

Months with the lowest humidity in East Helena are July and August, with an average relative humidity of 46%.

What month has the most sunshine in East Helena?

July has the most sunshine of the year, with an average of 11.7h of sunshine.

When is the highest UV index in East Helena?

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

What is the coldest month in East Helena?

With an average high-temperature of 27.7°F (-2.4°C) and an average low-temperature of 14.2°F (-9.9°C), December is the coldest month.

What is the month with the shortest days in East Helena?

The month with the shortest days in East Helena, Montana, is December, with an average of 8.6h of daylight.
Average temperature - East Helena, MT
Average pressure - East Helena, MT

The month with the highest atmospheric pressure is January (30.18").
The month with the lowest atmospheric pressure is June (29.9").

Average wind speed - East Helena, MT

The windiest month (with the highest average wind speed) is November (7.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity - East Helena, MT
Average rainfall - East Helena, MT

The wettest month (with the highest rainfall) is June (2.01").
The driest months (with the least rainfall) are January and December (0.63").

Average rainfall days - East Helena, MT
Average snowfall - East Helena, MT
Average snowfall days - East Helena, MT

The month with the highest number of snowfall days is February (16.2 days).
Months with the least snowfall days are July and August (0 days).

Average daylight / Average sunshine - East Helena, MT

The month with the longest days is June (Average daylight: 15.8h).
The month with the shortest days is December (Average daylight: 8.6h).

The month with the most sunshine is July (Average sunshine: 11.7h).
The month with the least sunshine is January (Average sunshine: 5.6h).

Average sunshine days - East Helena, MT
Average visibility - East Helena, MT

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