Decker
Montana, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Decker, MT

January, the same as December, in Decker, Montana, is a freezing cold winter month, with temperature in the range of an average low of 16.2°F (-8.8°C) and an average high of 31.8°F (-0.1°C). In Decker, the average high-temperature is essentially the same as in December - a still freezing cold 31.8°F (-0.1°C). Weather in January »

February, the last month of the winter, in Decker, is also a subzero cold month, with average temperature fluctuating between 16.2°F (-8.8°C) and 31.6°F (-0.2°C). In Decker, the average high-temperature is relatively the same as in January - a still freezing cold 31.6°F (-0.2°C). Weather in February »

March, the first month of the spring, in Decker, is a chilly month, with average temperature varying between 28.2°F (-2.1°C) and 45°F (7.2°C). In March, the average high-temperature increases, from a subzero cold 31.6°F (-0.2°C) in February, to a frosty 45°F (7.2°C). Weather in March »

April is a cool spring month in Decker, Montana, with average temperature varying between 53.1°F (11.7°C) and 34.2°F (1.2°C). In April, the average high-temperature slightly increases, from a chilly 45°F (7.2°C) in March, to a fresh 53.1°F (11.7°C). Weather in April »

May, the last month of the spring, in Decker, is an enjoyable month, with temperature in the range of an average high of 63.7°F (17.6°C) and an average low of 43.5°F (6.4°C). In Decker, the average high-temperature increases, from a fresh 53.1°F (11.7°C) in April, to an enjoyable 63.7°F (17.6°C). Weather in May »

The first month of the summer, June, is a moderately hot month in Decker, Montana, with temperature in the range of an average low of 52.9°F (11.6°C) and an average high of 75.7°F (24.3°C). In Decker, the average high-temperature increases, from an enjoyable 63.7°F (17.6°C) in May, to a moderately hot 75.7°F (24.3°C). Weather in June »

July, the same as June, is another warm summer month in Decker, Montana, with temperature in the range of an average high of 85.5°F (29.7°C) and an average low of 61.5°F (16.4°C). July is the warmest month, with an average high-temperature of 85.5°F (29.7°C) and an average low-temperature of 61.5°F (16.4°C). The average heat index is calculated to 85.5°F (29.7°C). Weather in July »

The last month of the summer, August, is another warm month in Decker, Montana, with average temperature ranging between max 83.7°F (28.7°C) and min 60.4°F (15.8°C). In Decker, the average high-temperature is practically the same as in July - a still moderately hot 83.7°F (28.7°C). Weather in August »

The first month of the autumn, September, is also a moderately hot month in Decker, Montana, with average temperature varying between 74.1°F (23.4°C) and 52.7°F (11.5°C). In September, the average high-temperature decreases, from a moderately hot 83.7°F (28.7°C) in August, to a still warm 74.1°F (23.4°C). Weather in September »

October, like September, is another mild autumn month in Decker, Montana, with average temperature fluctuating between 56.8°F (13.8°C) and 39°F (3.9°C). In Decker, the average high-temperature plummets, from a moderately hot 74.1°F (23.4°C) in September, to a mild 56.8°F (13.8°C). Weather in October »

The last month of the autumn, November, is also a frosty month in Decker, Montana, with average temperature ranging between max 43.3°F (6.3°C) and min 27.1°F (-2.7°C). In Decker, Montana, the average high-temperature decreases, from a mild 56.8°F (13.8°C) in October, to a chilly 43.3°F (6.3°C). Weather in November »

December, the first month of the winter, in Decker, is also a subzero cold month, with temperature in the range of an average high of 31.1°F (-0.5°C) and an average low of 16.7°F (-8.5°C). December is the coldest month, with an average high-temperature of 31.1°F (-0.5°C) and an average low-temperature of 16.7°F (-8.5°C). Weather in December »

What is the most humid month in Decker?

Months with the highest humidity are January and February, with an average relative humidity of 79%.

How much does it rain in Decker?

In Decker, during the entire year, the rain falls for 127.6 days and collects up to 14.25" (362mm) of precipitation.

When does it snow in Decker?

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

How much does it snow in Decker?

Throughout the year, in Decker, Montana, there are 65.3 snowfall days, and 28.82" (732mm) of snow is accumulated.

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

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Decker, Montana.

When does it snow the most in Decker?

February is the month with the most snowfall. Snow falls for 14.3 days and accumulates 5.2" (132mm) of snow.

What is the month with the least sunshine in Decker?

The month with the least sunshine in Decker, Montana, is February, with an average of 5.7h of sunshine.

What is the wettest month in Decker?

May is the month with the most rainfall. Rain falls for 18 days and accumulates 2.64" (67mm) of precipitation.

When it does not snow in Decker?

June through August are months without snowfall.

When are the longest days in Decker?

June has the longest days of the year, with an average of 15.6h of daylight.

What is the warmest month in Decker?

The warmest month is July, with an average high-temperature of 85.5°F (29.7°C) and an average low-temperature of 61.5°F (16.4°C).

What are the months with the most sunshine in Decker?

Months with the most sunshine are July and August, with an average of 11.9h of sunshine.

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

The month with the highest UV index is July, with an average maximum UV index of 7.

What is the least humid month in Decker?

With an average relative humidity of 40%, August is the least humid month in Decker, Montana.

What is the coldest month in Decker?

With an average high-temperature of 31.1°F (-0.5°C) and an average low-temperature of 16.7°F (-8.5°C), December is the coldest month.

What is the driest month in Decker?

The month with the least rainfall in Decker, Montana, is December when the rain falls for 6.8 days and typically collects 0.67" (17mm) of precipitation.

What is the month with the shortest days in Decker?

The month with the shortest days in Decker is December, with an average of 8.8h of daylight.
Average temperature - Decker, MT
Average humidity - Decker, MT
Average rainfall - Decker, MT
Average rainfall days - Decker, MT
Average snowfall - Decker, MT
Average snowfall days - Decker, MT

The month with the highest number of snowfall days is February (14.3 days).
Months with the least snowfall days are June, July and August (0 days).

Average daylight / Average sunshine - Decker, MT

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

Months with the most sunshine are July and August (Average sunshine: 11.9h).
The month with the least sunshine is February (Average sunshine: 5.7h).

Average UV index - Decker, MT