Climate and monthly weather forecastDillon, MT
Climate and monthly weather forecast
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 »Updated: Jul 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The month with the least rainfall is January, when the rain falls for 8 days and typically collects 0.51" (13mm) of precipitation.
Throughout the year, there are 126.7 rainfall days, and 10.35" (263mm) of precipitation is accumulated.
January through June, September through December are months with snowfall.
In Dillon, during the entire year, snow falls for 81.2 days and aggregates up to 29.76" (756mm) of snow.
With an average relative humidity of 86%, February is the most humid month.
The month with the most snowfall is February, when snow falls for 14.1 days and typically aggregates up to 5.51" (140mm) of snow.
With an average maximum UV index of 1, February is the month with the lowest UV index.
On Sunday, March 10. 2024, 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 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.
The month with the most rainfall is June, when the rain falls for 14 days and typically aggregates up to 1.5" (38mm) of precipitation.
June has the longest days of the year, with an average of 15h and 36min of daylight.
July is the warmest month, with the temperature often reaching an average high of 77.5°F (25.3°C) and an average low of 47.5°F (8.6°C).
July and August, with an average relative humidity of 45%, are the least humid months.
In Dillon, snow does not fall in July and August.
With an average of 12h of sunshine, July has the most sunshine of the year.
The month with the highest UV index in Dillon is July, with an average maximum UV index of 5.
In Dillon, December is the coldest month, with temperatures averaging a high of 25.2°F (-3.8°C) and a low of 10.6°F (-11.9°C).
December has the shortest days of the year, with an average of 8h and 48min of daylight.
December has the least sunshine of the year, with an average of 6.1h of sunshine.
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).
Average pressure
Dillon, MT
- Average pressure in January:
30.24"Hg - Average pressure in February:
30.15"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
29.99"Hg - Average pressure in October:
30.06"Hg - Average pressure in November:
30.15"Hg - Average pressure in December:
30.23"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Dillon, MT
- Average wind speed in January:
6.5mph - Average wind speed in February:
6.3mph - Average wind speed in March:
6.5mph - Average wind speed in April:
6.5mph - Average wind speed in May:
5.7mph - Average wind speed in June:
5.7mph
- Average wind speed in July:
5.2mph - Average wind speed in August:
4.8mph - Average wind speed in September:
5.2mph - Average wind speed in October:
6.2mph - Average wind speed in November:
6.8mph - Average wind speed in December:
6.5mph
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).
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%).
Average rainfall
Dillon, MT
- Average rainfall in January:
0.51" - Average rainfall in February:
0.79" - Average rainfall in March:
0.83" - Average rainfall in April:
1.18" - Average rainfall in May:
1.26" - Average rainfall in June:
1.5"
- Average rainfall in July:
0.75" - Average rainfall in August:
0.71" - Average rainfall in September:
0.87" - Average rainfall in October:
0.71" - Average rainfall in November:
0.63" - Average rainfall in December:
0.63"
The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days
Dillon, MT
- Average rainfall days in January:
8 days - Average rainfall days in February:
7.7 days - Average rainfall days in March:
12.9 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
15.3 days - Average rainfall days in June:
14 days
- Average rainfall days in July:
8.5 days - Average rainfall days in August:
8.7 days - Average rainfall days in September:
9.7 days - Average rainfall days in October:
10.2 days - Average rainfall days in November:
8 days - Average rainfall days in December:
8.9 days
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).
Average snowfall
Dillon, MT
- Average snowfall in January:
3.74" - Average snowfall in February:
5.51" - Average snowfall in March:
4.06" - Average snowfall in April:
3.66" - Average snowfall in May:
1.18" - Average snowfall in June:
0.04"
The month with the highest snowfall is February (5.51").
The months with the least snowfall are July and August (0").
Average snowfall days
Dillon, MT
- Average snowfall days in January:
13 days - Average snowfall days in February:
14.1 days - Average snowfall days in March:
13.2 days - Average snowfall days in April:
9 days - Average snowfall days in May:
1.9 days - Average snowfall days in June:
0.2 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
1 days - Average snowfall days in October:
4.5 days - Average snowfall days in November:
10.3 days - Average snowfall days in December:
14 days
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).
Average daylight / Average sunshine
Dillon, MT
- Average daylight in January:
9h and 12min - Average daylight in February:
10h and 24min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 54min - Average daylight in June:
15h and 36min
- Average daylight in July:
15h and 12min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 54min - Average daylight in November:
9h and 30min - Average daylight in December:
8h and 48min
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).
- Average sunshine in January:
6h and 12min - Average sunshine in February:
6h and 42min - Average sunshine in March:
8h and 18min - Average sunshine in April:
10h and 0min - Average sunshine in May:
10h and 54min - Average sunshine in June:
11h and 36min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
11h and 48min - Average sunshine in September:
9h and 48min - Average sunshine in October:
7h and 30min - Average sunshine in November:
6h and 48min - Average sunshine in December:
6h and 6min
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).
Average sunshine days
Dillon, MT
- Average sunshine days in January:
16.8 days - Average sunshine days in February:
13.2 days - Average sunshine days in March:
11.8 days - Average sunshine days in April:
10.1 days - Average sunshine days in May:
11.5 days - Average sunshine days in June:
11.6 days
- Average sunshine days in July:
18.2 days - Average sunshine days in August:
16.9 days - Average sunshine days in September:
16.5 days - Average sunshine days in October:
16.8 days - Average sunshine days in November:
17 days - Average sunshine days in December:
15.5 days
The month with the most sunshine days is July (18.2 days).
The month with the least sunshine days is April (10.1 days).
Average UV index
Dillon, MT
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover
Dillon, MT
The month with the most cloud cover is February (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 13).
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).
