Climate and monthly weather forecastDarby, MT
Climate and monthly weather forecast
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 »Updated: Jul 9, 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
January is the most humid month, with an average relative humidity of 89%.
Throughout the year, there are 163.6 rainfall days, and 20.83" (529mm) of precipitation is accumulated.
January through May, September through December are months with snowfall.
In Darby, during the entire year, snow falls for 101.1 days and aggregates up to 59.17" (1503mm) of snow.
The months with the least sunshine are January and December, with an average of 5.4h of sunshine.
The wettest months are February and April, with an average 2.36" (60mm) of rainfall.
February is the month with the most snowfall in Darby. Snow falls for 19.3 days and accumulates 13.03" (331mm) of snow.
The months with the lowest UV index are February and December, with an average maximum UV index of 1.
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.
In Darby, Montana, snow does not fall in June through August.
With an average of 15h and 42min of daylight, June has the longest days of the 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).
The months with the most sunshine are July and August, with an average of 11.7h of sunshine.
The month with the highest UV index is July, with an average maximum UV index of 5.
The least humid month is August, with an average relative humidity of 50%.
The month with the least rainfall is August, when the rain falls for 8.7 days and typically collects 0.75" (19mm) of precipitation.
Temperature readings reach their annual highs in December, averaging 26.8°F (-2.9°C) and a minimum average of 14°F (-10°C).
December has the shortest days of the year, with an average of 8h and 42min of daylight.
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 in January:
30.21"Hg - Average pressure in February:
30.13"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
30.01"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
29.99"Hg - Average pressure in October:
30.06"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.19"Hg
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 in January:
5.3mph - Average wind speed in February:
5.1mph - Average wind speed in March:
5mph - Average wind speed in April:
5mph - Average wind speed in May:
4.5mph - Average wind speed in June:
4.5mph
- Average wind speed in July:
4.3mph - Average wind speed in August:
4.1mph - Average wind speed in September:
4.4mph - Average wind speed in October:
4.8mph - Average wind speed in November:
5.2mph - Average wind speed in December:
5.2mph
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
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 in January:
2.05" - Average rainfall in February:
2.36" - Average rainfall in March:
2.28" - Average rainfall in April:
2.36" - Average rainfall in May:
1.97" - Average rainfall in June:
2.09"
- Average rainfall in July:
0.79" - Average rainfall in August:
0.75" - Average rainfall in September:
0.98" - Average rainfall in October:
1.46" - Average rainfall in November:
1.77" - Average rainfall in December:
1.97"
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 in January:
11.9 days - Average rainfall days in February:
12.5 days - Average rainfall days in March:
18.8 days - Average rainfall days in April:
18.5 days - Average rainfall days in May:
19.5 days - Average rainfall days in June:
15.3 days
- Average rainfall days in July:
8 days - Average rainfall days in August:
8.7 days - Average rainfall days in September:
9.9 days - Average rainfall days in October:
14.5 days - Average rainfall days in November:
13.1 days - Average rainfall days in December:
12.9 days
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 in January:
11.89" - Average snowfall in February:
13.03" - Average snowfall in March:
9.09" - Average snowfall in April:
5.67" - Average snowfall in May:
0.67" - Average snowfall in June:
0"
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 in January:
18.6 days - Average snowfall days in February:
19.3 days - Average snowfall days in March:
16 days - Average snowfall days in April:
10.3 days - Average snowfall days in May:
2.3 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.4 days - Average snowfall days in October:
3.5 days - Average snowfall days in November:
12.1 days - Average snowfall days in December:
18.6 days
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 in January:
9h and 6min - Average daylight in February:
10h and 24min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 36min - Average daylight in May:
15h and 0min - Average daylight in June:
15h and 42min
- Average daylight in July:
15h and 18min - Average daylight in August:
14h and 6min - 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 42min
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).
- Average sunshine in January:
5h and 24min - Average sunshine in February:
6h and 6min - Average sunshine in March:
7h and 6min - Average sunshine in April:
8h and 54min - Average sunshine in May:
10h and 24min - Average sunshine in June:
11h and 0min
- Average sunshine in July:
11h and 42min - Average sunshine in August:
11h and 42min - Average sunshine in September:
9h and 30min - Average sunshine in October:
7h and 18min - Average sunshine in November:
6h and 6min - Average sunshine in December:
5h and 24min
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 in January:
10.2 days - Average sunshine days in February:
5.6 days - Average sunshine days in March:
6.3 days - Average sunshine days in April:
6.9 days - Average sunshine days in May:
8.5 days - Average sunshine days in June:
11.1 days
- Average sunshine days in July:
18.9 days - Average sunshine days in August:
17.4 days - Average sunshine days in September:
16.1 days - Average sunshine days in October:
13.1 days - Average sunshine days in November:
10.4 days - Average sunshine days in December:
10 days
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 UV index
Darby, MT
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover
Darby, MT
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 13).
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).
