Monthly weather forecast and climate
Dillon, MT

Weather in January

January, like December, is another subzero cold winter month in Dillon, Montana, with temperature in the range of an average high of 27.9°F (-2.3°C) and an average low of 12.2°F (-11°C). In January, the average high-temperature is relatively the same as in December - a still subzero cold 27.9°F (-2.3°C). Weather in January »

Weather in February

The last month of the winter, February, is another freezing cold month in Dillon, Montana, with average temperature ranging between max 27.5°F (-2.5°C) and min 11.8°F (-11.2°C). In February, the average high-temperature is essentially the same as in January - a still subzero cold 27.5°F (-2.5°C). Weather in February »

Weather in March

March, the first month of the spring, in Dillon, is a cold month, with average temperature ranging between min 20.1°F (-6.6°C) and max 35.6°F (2°C). In Dillon, Montana, the average high-temperature in March slightly increases, from a subzero cold 27.5°F (-2.5°C) in February, to a cold 35.6°F (2°C). Weather in March »

Weather in April

April in Dillon, Montana, is a frosty spring month, with average temperature varying between 27.7°F (-2.4°C) and 44.6°F (7°C). In Dillon, the average high-temperature in April increases, from a cold 35.6°F (2°C) in March, to a chilly 44.6°F (7°C). Weather in April »

Weather in May

The last month of the spring, May, is a mild month in Dillon, Montana, with average temperature varying between 56.3°F (13.5°C) and 35.2°F (1.8°C). In May, the average high-temperature rises, from a chilly 44.6°F (7°C) in April, to a mild 56.3°F (13.5°C). Weather in May »

Weather in June

June, the first month of the summer, in Dillon, is a comfortable month, with temperature in the range of an average low of 41.7°F (5.4°C) and an average high of 66.7°F (19.3°C). In Dillon, Montana, the average high-temperature rises, from a moderate 56.3°F (13.5°C) in May, to a comfortable 66.7°F (19.3°C). Weather in June »

Weather in July

July in Dillon, Montana, is a moderately hot summer month, with average temperature ranging between min 47.5°F (8.6°C) and max 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 47.5°F (8.6°C). Weather in July »

Weather in August

August, the last month of the summer, in Dillon, is also a moderately hot month, with average temperature ranging between max 75.7°F (24.3°C) and min 47.3°F (8.5°C). In Dillon, the average high-temperature is relatively the same as in July - a still moderately hot 75.7°F (24.3°C). Weather in August »

Weather in September

The first month of the autumn, September, is also an enjoyable month in Dillon, Montana, with average temperature fluctuating between 66°F (18.9°C) and 41.7°F (5.4°C). In Dillon, the average high-temperature decreases, from a warm 75.7°F (24.3°C) in August, to an enjoyable 66°F (18.9°C). Weather in September »

Weather in October

October, the same as September, in Dillon, Montana, is another chilly autumn month, with temperature in the range of an average low of 31.1°F (-0.5°C) and an average high of 49.3°F (9.6°C). In Dillon, the average high-temperature plummets, from a comfortable 66°F (18.9°C) in September, to a chilly 49.3°F (9.6°C). Weather in October »

Weather in November

November, the last month of the autumn, in Dillon, is also a wintry month, with temperature in the range of an average high of 35.4°F (1.9°C) and an average low of 20.1°F (-6.6°C). In Dillon, the average high-temperature decreases, from a chilly 49.3°F (9.6°C) in October, to a wintry 35.4°F (1.9°C). Weather in November »

Weather in December

The first month of the winter, December, is still a freezing cold month in Dillon, Montana, with average temperature fluctuating between 10.6°F (-11.9°C) and 25.2°F (-3.8°C). December is the coldest month, with an average high-temperature of 25.2°F (-3.8°C) and an average low-temperature of 10.6°F (-11.9°C). Weather in December »
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FAQ

How many days does it rain in Dillon?

Throughout the year, there are 126.7 rainfall days, and 10.35" (263mm) of precipitation is accumulated.

What is the driest month in Dillon?

The month with the least rainfall is January when the rain falls for 8 days and typically collects 0.51" (13mm) of precipitation.

When does it snow in Dillon?

Months with snowfall in Dillon, Montana, are January through June, September through December.

How many days does it snow in Dillon?

In Dillon, Montana, during the entire year, snow falls for 81.2 days, and aggregates up to 29.76" (756mm) of snow.

What is the most humid month in Dillon?

The most humid month in Dillon, Montana, is February, with an average relative humidity of 86%.

What is the snowiest month in Dillon?

February is the month with the most snowfall. Snow falls for 14.1 days and accumulates 5.51" (140mm) of snow.

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

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

What is the wettest month in Dillon?

The month with the most rainfall in Dillon, Montana, is June when the rain falls for 14 days and typically aggregates up to 1.5" (38mm) of precipitation.

When are the longest days in Dillon?

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

What is the warmest month in Dillon?

The warmest month in Dillon, Montana, is July, with an average high-temperature of 77.5°F (25.3°C) and an average low-temperature of 47.5°F (8.6°C).

What are the least humid months in Dillon?

July and August, with an average relative humidity of 45%, are the least humid months in Dillon.

When it does not snow in Dillon?

July and August are months without snowfall in Dillon, Montana.

What month has the most sunshine in Dillon?

July has the most sunshine of the year in Dillon, with an average of 12h of sunshine.

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

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

What is the coldest month in Dillon?

The coldest month is December, with an average high-temperature of 25.2°F (-3.8°C) and an average low-temperature of 10.6°F (-11.9°C).

What is the month with the shortest days in Dillon?

With an average of 8.8h of daylight, December has the shortest days of the year in Dillon.

What is the month with the least sunshine in Dillon?

The month with the least sunshine is December, with an average of 6.1h of sunshine.

Average temperature
Dillon, MT

Average temperature - Dillon, MT

The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is December (25.2°F).

The month with the highest average low temperature is July (47.5°F).
The coldest month (with the lowest average low temperature) is December (10.6°F).

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Average pressure
Dillon, MT

Average pressure - Dillon, MT

The month with the highest atmospheric pressure is January (30.24").
The month with the lowest atmospheric pressure is June (29.92").

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Average wind speed
Dillon, MT

Average wind speed - Dillon, MT

The windiest month (with the highest average wind speed) is November (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity
Dillon, MT

Average humidity - Dillon, MT

The month with the highest relative humidity is February (86%).
Months with the lowest relative humidity are July and August (45%).

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Average rainfall
Dillon, MT

Average rainfall - Dillon, MT

The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is January (0.51").

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Average rainfall days
Dillon, MT

Average rainfall days - Dillon, MT

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (7.7 days).

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Average snowfall
Dillon, MT

Average snowfall - Dillon, MT

The month with the highest snowfall is February (5.51").
Months with the least snowfall are July and August (0").

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Average snowfall days
Dillon, MT

Average snowfall days - Dillon, MT

The month with the highest number of snowfall days is February (14.1 days).
Months with the least snowfall days are July and August (0 days).

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Average daylight / Average sunshine
Dillon, MT

Average daylight / Average sunshine - Dillon, 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).

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 6.1h).

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Average sunshine days
Dillon, MT

Average sunshine days - Dillon, MT

The month with the most sunshine days is July (18.2 days).
The month with the least sunshine days is April (10.1 days).

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Average visibility
Dillon, MT

Average visibility - Dillon, 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).

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