Climate and monthly weather forecast
Darby, MT

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Weather in January

January, like December, is another subzero cold winter month in Darby, Montana, with an average temperature varying between 28.8°F (-1.8°C) and 16.2°F (-8.8°C). The initiation of January records an average high-temperature of a still subzero cold 28.8°F (-1.8°C), displaying a near consistency with the previous month. Weather in January »

Weather in February

February, the last month of the winter in Darby, is another freezing cold month, with temperature in the range of an average high of 28.8°F (-1.8°C) and an average low of 15.1°F (-9.4°C). With the advent of February, Darby's high-temperatures adjust to a still freezing cold 28.8°F (-1.8°C), closely aligning with the preceding month. Weather in February »

Weather in March

March, the first month of the spring in Darby, is a wintry month, with an average temperature ranging between min 21°F (-6.1°C) and max 36°F (2.2°C). With the onset of March, Darby's weather sees a minor temperature rise, transitioning from a freezing cold 28.8°F (-1.8°C) in February to a cold 36°F (2.2°C). Weather in March »

Weather in April

April in Darby, Montana, is a frosty spring month, with an average temperature varying between 43.5°F (6.4°C) and 25.9°F (-3.4°C). The start of April signals a slight increase in the average high-temperature, moving from a wintry 36°F (2.2°C) in March to a chilly 43.5°F (6.4°C). Weather in April »

Weather in May

May, the last month of the spring in Darby, is a mild month, with an average temperature ranging between max 56.7°F (13.7°C) and min 33.4°F (0.8°C). The average high-temperature increases in May, moving from a chilly 43.5°F (6.4°C) in April to a moderate 56.7°F (13.7°C). Weather in May »

Weather in June

June, the first month of the summer in Darby, is a refreshing month, with an average temperature varying between 65.3°F (18.5°C) and 40.6°F (4.8°C). The transition from May to June brings a subtle temperature rise, with average high-temperatures increasing from a refreshing 56.7°F (13.7°C) to a comfortable 65.3°F (18.5°C). Weather in June »

Weather in July

July in Darby, Montana, is a moderately hot summer month, with temperature in the range of an average high of 77°F (25°C) and an average low of 46.8°F (8.2°C). With average high temperatures of 77°F (25°C) and lows of 46.8°F (8.2°C), July is the warmest month. Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Darby, Montana, with an average temperature fluctuating between 46.9°F (8.3°C) and 76.3°F (24.6°C). Darby commences August with an average high-temperature of a still moderately hot 76.3°F (24.6°C), maintaining a close resemblance to the previous month. Weather in August »

Weather in September

The first month of the autumn, September, is still a comfortable month in Darby, Montana, with an average temperature fluctuating between 39.9°F (4.4°C) and 66.2°F (19°C). The onset of September introduces a moderate change in Darby's weather, with average high-temperatures falling from August's warm 76.3°F (24.6°C) to an enjoyable 66.2°F (19°C). Weather in September »

Weather in October

October, like September, in Darby, Montana, is another fresh autumn month, with an average temperature varying between 50°F (10°C) and 30.4°F (-0.9°C). October is marked by a significant decrease, with the average high-temperature retreating from an enjoyable 66.2°F (19°C) in September to a fresh 50°F (10°C). Weather in October »

Weather in November

November, the last month of the autumn in Darby, is also an icy month, with an average temperature varying between 36.1°F (2.3°C) and 21.9°F (-5.6°C). The arrival of November corresponds with a temperature reduction, down from October's cool 50°F (10°C) to a wintry 36.1°F (2.3°C). Weather in November »

Weather in December

The first month of the winter, December, is still a freezing cold month in Darby, Montana, with temperature in the range of an average low of 14°F (-10°C) and an average high of 26.8°F (-2.9°C). Temperature readings reach their annual highs in December, averaging 26.8°F (-2.9°C) and a minimum average of 14°F (-10°C). Weather in December »

Frequently asked questions

What is the most humid month in Darby?

January is the most humid month, with an average relative humidity of 89%.

How many days does it rain?

Throughout the year, there are 163.6 rainfall days, and 20.83" (529mm) of precipitation is accumulated.

When does it snow?

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

How many days does it snow?

In Darby, during the entire year, snow falls for 101.1 days and aggregates up to 59.17" (1503mm) of snow.

What is the month with the least sunshine?

The months with the least sunshine are January and December, with an average of 5.4h of sunshine.

What is the wettest month?

The wettest months are February and April, with an average 2.36" (60mm) of rainfall.

What is the snowiest month?

February is the month with the most snowfall in Darby. Snow falls for 19.3 days and accumulates 13.03" (331mm) of snow.

What is the month with the lowest UV index?

The months with the lowest UV index are February and December, with an average maximum UV index of 1.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Darby, 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.

When it does not snow?

In Darby, Montana, snow does not fall in June through August.

When are the longest days?

With an average of 15h and 42min of daylight, June has the longest days of the year.

What is the hottest time of year?

The temperatures in Darby reach their highest averages in July, with highs of 77°F (25°C) and lows of 46.8°F (8.2°C).

What are the months with the most sunshine?

The months with the most sunshine are July and August, with an average of 11.7h of sunshine.

When is the highest UV index?

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

What is the least humid month?

The least humid month is August, with an average relative humidity of 50%.

What is the driest month?

The month with the least rainfall is August, when the rain falls for 8.7 days and typically collects 0.75" (19mm) of precipitation.

What are the coldest months?

Temperature readings reach their annual highs in December, averaging 26.8°F (-2.9°C) and a minimum average of 14°F (-10°C).

What is the month with the shortest days?

December has the shortest days of the year, with an average of 8h and 42min of daylight.

Average temperature
Darby, MT

Average temperature - Darby, MT

The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (26.8°F).

The month with the highest average low temperature is August (46.9°F).
The coldest month (with the lowest average low temperature) is December (14°F).

Average pressure
Darby, MT

Average pressure - Darby, MT

The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed
Darby, MT

Average wind speed - Darby, MT

The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).

Average humidity
Darby, MT

Average humidity - Darby, MT

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (50%).

Average rainfall
Darby, MT

Average rainfall - Darby, MT

The wettest months (with the highest rainfall) are February and April (2.36").
The driest month (with the least rainfall) is August (0.75").

Average rainfall days
Darby, MT

Average rainfall days - Darby, MT

The month with the highest number of rainy days is May (19.5 days).
The month with the least rainy days is July (8 days).

Average snowfall
Darby, MT

Average snowfall - Darby, MT

The month with the highest snowfall is February (13.03").
The months with the least snowfall are June, July and August (0").

Average snowfall days
Darby, MT

Average snowfall days - Darby, MT

The month with the highest number of snowfall days is February (19.3 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight / Average sunshine
Darby, MT

Average daylight / Average sunshine - Darby, MT

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

The months with the most sunshine are July and August (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).

Average sunshine days
Darby, MT

Average sunshine days - Darby, MT

The month with the most sunshine days is July (18.9 days).
The month with the least sunshine days is February (5.6 days).

Average visibility
Darby, MT

Average visibility - Darby, MT

The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).

Darby, Montana, USA

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