Climate and monthly weather forecast
Dillon, MT

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The climate of Dillon

Dillon, located in Montana, USA, lies in the Köppen climate zone identified as BSk. It means that Dillon has a predominant mid-latitude steppe climate. Peaks of weather conditions fluctuate throughout the annual cycle, indicating marked climate variables.

Temperature patterns in Dillon vary widely from freezing winter conditions to warm summer months. For instance, average high temperatures range from a chilly 25.2°F (-3.8°C) in December to a warm 77.5°F (25.3°C) in July. On the other hand, average low temperatures oscillate between a cold 10.6°F (-11.9°C) in December and a mild 47.5°F (8.6°C) in July.

Humidity levels also fluctuate throughout the year from a high of 86% in February to a low of 45% during July and August. Rainfall varies from a modest 0.51" (13mm) in January to a peak of 1.5" (38mm) in June. Snowfall in Dillon is also a significant aspect of the climate, with notable levels of snow from December to February, peaking at 4.45" (113mm) in December.

Aside from precipitation, daylight and sunshine hours present differential patterns along the year. At 15.6 hours, June experiences the longest daylight hours, while December has the shortest at 8.8 hours. Correspondingly, sunshine days are longest from July to September, with a high of 18.2 days in July.

The best time to visit Dillon

Based on the climatological data, the best time to visit Dillon would be from June to September when the weather conditions are mostly favorable. These months feature the highest temperatures, with highs ranging from 66°F (18.9°C) to 77.5°F (25.3°C) and lows between 41.7°F (5.4°C) to 47.5°F (8.6°C). These conditions are perfect for outdoor activities, especially hikes and sightseeing.

The months of June to September also host the longest sunshine days and daylight hours, providing sunny conditions for outdoor exploration. However, one must keep in mind the humidity and rainfall levels; both tend to be moderately high with rainfall peaking into 1.5" (38mm) in June.

The worst time to visit Dillon

Contrastingly, the harshest time to visit Dillon would be during the frigid winter months, particularly December and January. During this period, the average low temperatures range from 12.2°F (-11°C) to 10.6°F (-11.9°C), with the highs not exceeding past the 35.4°F (1.9°C) mark. Snowfall also makes its peak arrival, reaching up to 4.45" (113mm) in December and marking the chilly weather.

Moreover, relative humidity levels are high, reaffirming the cold, somber conditions prevalent during December and January. Therefore, unless visitors are ardent fans of winter sports, they may want to avoid this period due to the frigid conditions.

Spring weather in Dillon

Spring initiates in Dillon with temperatures comfortably between 35.6°F (2°C) and 44.6°F (7°C) for March and April. By May, they elevate to reach an average high of 56.3°F (13.5°C) while the average low stays at 35.2°F (1.8°C). Rainfall also sees an increase, particularly in April and May with 1.18" (30mm) and 1.26" (32mm), respectively.

Summer weather in Dillon

Summers in Dillon provide pleasing climatic conditions, with temperatures comfortably fluctuating between 66°F (18.9°C) and 77.5°F (25.3°C). The town also sees a reduction in relative humidity during the summer months, dropping to a yearly low of 45% in July and August. Despite the increase in rainfall, June remains a favored month due to longer daylight and sunshine hours.

Autumn weather in Dillon

Autumn in Dillon introduces a drop in temperatures and daylight hours. Starting from 75.7°F (24.3°C) in September, the temperature falls to 49.3°F (9.6°C) by November. This period also witnesses an escalation in humidity levels and rainfall.

Winter weather in Dillon

Winter weather in Dillon is characterized by cold temperatures, high snowfall, and elevated humidity. Frosty temperatures drop to an average low of 10.6°F (-11.9°C) in December, while average highs barely reach 35.4°F (1.9°C). Snowfall peaks at 4.45" (113mm) in December, creating a wintry landscape.

Weather in January

January sets the stage for the winter in Dillon, Montana with cold temperatures and increased snowfall dominating the weather pattern. Those attending outside activities need to don their warmest jackets, as the biting winds can make the already low temperatures feel even colder. Weather in January »

Weather in February

As February arrives, Dillon remains gripped in the firm clutches of winter. The city, adorned by snow, does not observe much fluctuation from January's weather. There is a slight increase in the snowfall compared to January, settling at 5.51" (140mm). Weather in February »

Weather in March

March in Dillon is marked by an introduction to spring, with temperatures gradually rising from the winter lows. This slight increase in warmth does not however completely dispel the vestiges of winter. Snow still intermittently graces the city, accumulating to 4.06" (103mm) over the month. Weather in March »

Weather in April

In April, Dillon witnesses an official welcome to the spring season as the snowy curtain of winter finally lifts. Spending the day outside becomes more pleasant, and the city begins to flourish in the newfound warmth. The snowfall dwindles to 3.66" (93mm). Weather in April »

Weather in May

May sees Dillon fully immersed in spring, with pleasant temperatures and clear skies. Outdoor activities become a popular pastime as parks and green spaces throb with life. The snowfall diminishes significantly from April to register at just 1.18" (30mm). Weather in May »

Weather in June

June invites Dillon into the balm of summer with warmer temperatures and extended daytime. The city, steeped in sunlight, becomes an outdoor enthusiast's paradise during this month. Snow is an extremely rare event, with only 0.04" (1mm) recorded. Weather in June »

Weather in July

July stands as the driest month in Dillon, leaning into the peak of summer with its clear skies and longer daylight hours. With temperatures reaching their zenith, air conditioning becomes a necessity for indoor comfort. Remarkably, this month does not witness any snowfall, letting the summer unfurl in its full glory. Weather in July »

Weather in August

Weather patterns in August mirror those of July. Dillon remains in the heart of summer with relaxing sunny days followed by mild nights. The city does not experience any snowfall this month either. The continuing clear skies offer perfect opportunities for star gazing and evening outdoor dinners. Weather in August »

Weather in September

In September, Dillon begins its transition from summer to autumn. The air takes on a crispy feel, and leaves start their transformation into hues of gold and red. With a slight increase in moisture, the city experiences a minor snowfall of 1.34" (34mm). Weather in September »

Weather in October

October fully ushers in the autumn season in Dillon. The city becomes a beautiful spectacle populated by trees blanketed in colorful fall foliage. A noticeable increase in snowfall, tallying up to 2.01" (51mm), hints at the upcoming winter. Weather in October »

Weather in November

November delivers a significant shift in weather as Dillon heads into its winter season. With temperatures continuously dropping, it is time to take out bulky winter gear for the cold ahead. The city observes a snowfall of 3.78" (96mm), setting the stage for the winter spectacle to follow. Weather in November »

Weather in December

December brings with it the full impact of winter in Dillon with temperatures hitting annual lows. Snowfall becomes a routine occurrence, adding to the festive ambiance of this holiday season. With 4.45" (113mm) of snow adorning the city, a dreamy white Christmas becomes a delightful prospect. Weather in December »
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Frequently asked questions

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.

How much does it rain in Dillon?

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

When does it snow in Dillon?

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

How many days does it snow in Dillon?

In Dillon, 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 is February, with an average relative humidity of 86%.

What is the snowiest month in Dillon?

The month with the most snowfall in Dillon, Montana, is February, when snow falls for 14.1 days and typically aggregates up to 5.51" (140mm) of snow.

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

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

When is Daylight Saving Time (DST) in Dillon?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.

What is the wettest month in Dillon?

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

When are the longest days in Dillon?

June has the longest days of the year, with an average of 15h and 36min of daylight.

What month is the hottest in Dillon?

In Dillon, Montana, the average temperatures in July are the highest, with a peak at 77.5°F (25.3°C) and a low of 47.5°F (8.6°C).

What is the least humid month in Dillon?

The months with the lowest humidity are July and August, with an average relative humidity of 45%.

When it does not snow in Dillon?

In Dillon, Montana, snow does not fall in July and August.

What month has the most sunshine in Dillon?

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

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

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

What month is the coldest in Dillon?

The month of December, characterized by an average high of 25.2°F (-3.8°C) and a low of 10.6°F (-11.9°C), is recognized as the coldest in Dillon.

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 48min of daylight.

What is the month with the least sunshine in Dillon?

December has the least sunshine of the year in Dillon, 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"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 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

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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Dillon, Montana, USA

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