Climate and monthly weather forecast
Dillon, MT

Weather in January

January, like December, is another subzero cold winter month in Dillon, Montana, with an average temperature fluctuating between 27.9°F (-2.3°C) and 12.2°F (-11°C). In Dillon, the average high-temperature in January is essentially 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 also a subzero cold month in Dillon, Montana, with an average temperature varying between 11.8°F (-11.2°C) and 27.5°F (-2.5°C). In Dillon, Montana, the average high-temperature in February is practically the same as in January - a still freezing cold 27.5°F (-2.5°C). Weather in February »

Weather in March

The first month of the spring, March, is a cold month in Dillon, Montana, with an average temperature varying between 20.1°F (-6.6°C) and 35.6°F (2°C). In March, the average high-temperature marginally rises from a subzero cold 27.5°F (-2.5°C) in February to a wintry 35.6°F (2°C). Weather in March »

Weather in April

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

Weather in May

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

Weather in June

June, the first month of the summer in Dillon, is an enjoyable month, with an average temperature ranging between max 66.7°F (19.3°C) and min 41.7°F (5.4°C). In June, 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 is a moderately hot summer month in Dillon, Montana, with temperature in the range of an average low of 47.5°F (8.6°C) and an average high of 77.5°F (25.3°C). July is the warmest month, 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 another warm month, with an average temperature varying between 75.7°F (24.3°C) and 47.3°F (8.5°C). In Dillon, the average high-temperature in August is essentially the same as in July - a still warm 75.7°F (24.3°C). Weather in August »

Weather in September

September, the first month of the autumn in Dillon, is also an enjoyable month, with temperature in the range of an average high of 66°F (18.9°C) and an average low of 41.7°F (5.4°C). In Dillon, the average high-temperature in September drops from a warm 75.7°F (24.3°C) in August to a comfortable 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 an average temperature varying between 49.3°F (9.6°C) and 31.1°F (-0.5°C). In October, the average high-temperature significantly decreases from an enjoyable 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 November, 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

December, the first month of the winter in Dillon, is also a subzero cold month, with an average temperature ranging between min 10.6°F (-11.9°C) and max 25.2°F (-3.8°C). 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). Weather in December »
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FAQ

What is the driest month in Dillon?

January is the month with the least rainfall in Dillon, Montana. Rain falls for 8 days and accumulates 0.51" (13mm) of precipitation.

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.

When does it snow in Dillon?

Months with snowfall are January through June, September through December.

How many days does it snow in Dillon?

Throughout the year, there are 81.2 snowfall days, and 29.76" (756mm) of snow is accumulated.

What is the most humid month in Dillon?

With an average relative humidity of 86%, February is the most humid month.

What is the snowiest month in Dillon?

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

When is the lowest UV index in Dillon?

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

When is Daylight Saving Time (DST) in Dillon?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Dillon, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from MDT to MST.

What is the rainiest month in Dillon?

June is the month with the most rainfall in Dillon. Rain falls for 14 days and accumulates 1.5" (38mm) of precipitation.

When are the longest days in Dillon?

The month with the longest days in Dillon is June, with an average of 15h and 35min of daylight.

What is the warmest month in Dillon?

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).

What is the least humid month 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.

What month has the most sunshine in Dillon?

July has the most sunshine of the year, 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?

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

What is the month with the shortest days in Dillon?

The month with the shortest days in Dillon is December, with an average of 8h and 49min of daylight.

What is the month with the least sunshine in Dillon?

With an average of 6.1h of sunshine, December has the least sunshine of the year.

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"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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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%).
The 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").
The 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).
The 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: 15h and 35min).
The month with the shortest days is December (Average daylight: 8h and 49min).

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).

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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

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

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