Monthly weather forecast and climate
Helmville, MT

January, the same as December, in Helmville, Montana, is another subzero cold winter month, with temperature in the range of an average low of 14.5°F (-9.7°C) and an average high of 28.8°F (-1.8°C). In Helmville, the average high-temperature is practically the same as in December - a still subzero cold 28.8°F (-1.8°C). Weather in January »

The last month of the winter, February, is another freezing cold month in Helmville, Montana, with temperature in the range of an average high of 28.6°F (-1.9°C) and an average low of 13.3°F (-10.4°C). In Helmville, the average high-temperature in February is relatively the same as in January - a still freezing cold 28.6°F (-1.9°C). Weather in February »

The first month of the spring, March, is a cold month in Helmville, Montana, with average temperature fluctuating between 37°F (2.8°C) and 20.7°F (-6.3°C). In Helmville, the average high-temperature marginally rises, from a subzero cold 28.6°F (-1.9°C) in February, to a wintry 37°F (2.8°C). Weather in March »

April is a chilly spring month in Helmville, Montana, with average temperature varying between 26.1°F (-3.3°C) and 45.3°F (7.4°C). In Helmville, the average high-temperature slightly increases, from a wintry 37°F (2.8°C) in March, to a chilly 45.3°F (7.4°C). Weather in April »

May, the last month of the spring, in Helmville, is a mild month, with average temperature ranging between max 57.4°F (14.1°C) and min 33.1°F (0.6°C). In Helmville, the average high-temperature in May increases, from a frosty 45.3°F (7.4°C) in April, to a moderate 57.4°F (14.1°C). Weather in May »

June, the first month of the summer, in Helmville, is an enjoyable month, with average temperature fluctuating between 66.7°F (19.3°C) and 39.9°F (4.4°C). In June, the average high-temperature rises, from a moderate 57.4°F (14.1°C) in May, to an enjoyable 66.7°F (19.3°C). Weather in June »

July is a warm summer month in Helmville, Montana, with temperature in the range of an average low of 46°F (7.8°C) and an average high of 78.1°F (25.6°C). The warmest month is July, with an average high-temperature of 78.1°F (25.6°C) and an average low-temperature of 46°F (7.8°C). Weather in July »

The last month of the summer, August, is another warm month in Helmville, Montana, with temperature in the range of an average low of 46.6°F (8.1°C) and an average high of 77°F (25°C). In August, the average high-temperature is relatively the same as in July - a still moderately hot 77°F (25°C). Weather in August »

September, the first month of the autumn, in Helmville, is still a comfortable month, with average temperature varying between 66.4°F (19.1°C) and 40.3°F (4.6°C). In September, the average high-temperature drops, from a warm 77°F (25°C) in August, to an enjoyable 66.4°F (19.1°C). Weather in September »

October, like September, is another chilly autumn month in Helmville, Montana, with average temperature varying between 30°F (-1.1°C) and 49.8°F (9.9°C). In October, the average high-temperature declines considerably, from a comfortable 66.4°F (19.1°C) in September, to a frosty 49.8°F (9.9°C). Weather in October »

The last month of the autumn, November, is also a wintry month in Helmville, Montana, with temperature in the range of an average high of 36.3°F (2.4°C) and an average low of 20.3°F (-6.5°C). In November, the average high-temperature decreases, from a frosty 49.8°F (9.9°C) in October, to a cold 36.3°F (2.4°C). Weather in November »

December, the first month of the winter, in Helmville, is also a subzero cold month, with average temperature varying between 12.6°F (-10.8°C) and 26.6°F (-3°C). December is the coldest month, with an average high-temperature of 26.6°F (-3°C) and an average low-temperature of 12.6°F (-10.8°C). Weather in December »

What is the most humid month in Helmville?

January and February, with an average relative humidity of 89%, are most humid months.

How many days does it rain in Helmville?

In Helmville, Montana, during the entire year, the rain falls for 114.8 days and collects up to 12.13" (308mm) of precipitation.

When does it snow in Helmville?

January through June, September through December are months with snowfall in Helmville.

How much does it snow in Helmville?

In Helmville, during the entire year, snow falls for 86.9 days, and aggregates up to 39.96" (1015mm) of snow.

What is the month with the least sunshine in Helmville?

Months with the least sunshine in Helmville are January and December, with an average of 5.6h of sunshine.

What is the month with the lowest UV index in Helmville?

With an average maximum UV index of 1, January is the month with the lowest UV index.

What is the snowiest month in Helmville?

February is the month with the most snowfall in Helmville. Snow falls for 18.1 days and accumulates 9.76" (248mm) of snow.

What is the rainiest month in Helmville?

The month with the most rainfall in Helmville is June when the rain falls for 13.3 days and typically aggregates up to 1.81" (46mm) of precipitation.

When are the longest days in Helmville?

The month with the longest days in Helmville is June, with an average of 15.8h of daylight.

What is the warmest month in Helmville?

The warmest month in Helmville is July, with an average high-temperature of 78.1°F (25.6°C) and an average low-temperature of 46°F (7.8°C).

What are the least humid months in Helmville?

July and August, with an average relative humidity of 49%, are the least humid months in Helmville, Montana.

When it does not snow in Helmville?

July and August are months without snowfall.

What month has the most sunshine in Helmville?

July has the most sunshine of the year in Helmville, Montana, with an average of 11.9h of sunshine.

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

July is the month with the highest UV index, with an average maximum UV index of 5.

What is the driest month in Helmville?

August through October are months with the least rain when the rain falls for 7 days and typically aggregates up to 0.59" (15mm) of rain.

What is the coldest month in Helmville?

With an average high-temperature of 26.6°F (-3°C) and an average low-temperature of 12.6°F (-10.8°C), December is the coldest month in Helmville.

What is the month with the shortest days in Helmville?

With an average of 8.6h of daylight, December has the shortest days of the year in Helmville, Montana.
Average temperature - Helmville, MT
Average pressure - Helmville, MT

The month with the highest atmospheric pressure is January (30.19").
The month with the lowest atmospheric pressure is June (29.92").

Average wind speed - Helmville, MT

The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity - Helmville, MT
Average rainfall - Helmville, MT

The wettest month (with the highest rainfall) is June (1.81").
The driest months (with the least rainfall) are August, September and October (0.59").

Average rainfall days - Helmville, MT
Average snowfall - Helmville, MT
Average snowfall days - Helmville, MT

The month with the highest number of snowfall days is February (18.1 days).
Months with the least snowfall days are July and August (0 days).

Average daylight / Average sunshine - Helmville, 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: 11.9h).
Months with the least sunshine are January and December (Average sunshine: 5.6).

Average sunshine days - Helmville, MT

The month with the most sunshine days is September (21.9 days).
The month with the least sunshine days is February (8.5 days).

Average visibility - Helmville, MT

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