Climate and monthly weather forecastLibby, MT
Climate and monthly weather forecast
The climate of Libby
Libby, Montana, with its geographical position in the USA's northern Rocky Mountains, experiences a Humid Continental climate, characterised by a dry and warm summer, classified as Dsb under the Köppen climate classification. This location experiences a wide range of weather conditions throughout the year, reflecting distinct seasons.The variation in weather parameters displays the pattern of a place accustomed to seasonal change. The highest average temperature peaks at 77.5°F (25.3°C) in July and August, while the coolest month, January, sees an average low of 15.1°F (-9.4°C). The rainfall pattern hints at a dry summer with the least recorded rain in August, measuring only 0.43" (11mm). The month with maximum rainfall is December, recording 2.24" (57mm). The snowfall indicates a predominantly snowy winter with the heaviest fall in January and December, with both months recording above 11" (279mm).
Cloud cover and humidity follow a similar trend throughout the year. The cloudiest periods are in winter with up to 70% cloud coverage in January, while the sunniest months occur in summer, particularly in July and August with an average of 15.6 hours of daylight and over 11 hours of sunshine.
The best time to visit Libby
The optimal time to visit Libby, Montana, significantly depends on the visitor's preferred weather conditions. For those seeking warm temperatures, the period spanning June to August is ideal, presenting temperatures between 59.5°F (15.3°C) and 77.5°F (25.3°C). During these months, sunshine is at its most abundant, presenting more than 10 hours per day.For tourists interested in outdoor activities without experiencing extreme temperatures, May and September offer moderate temperatures and relatively low rainfall of 1.73" (44mm) and 0.91" (23mm) respectively.
The worst time to visit Libby
Visitors who are not well equipped or accustomed to extremely cold conditions should avoid timing their stay between December and February. Winter in Libby is characterised by freezing temperatures dropping down to 15.1°F (-9.4°C) in January and heavy snowfall measuring over 10" (254mm) in both December and January.Spring weather in Libby
Spring in Libby, ranging from March to May, greets residents and tourists with gradually warming temperatures. March averages 37°F (2.8°C) and by May, it climbs to 59.5°F (15.3°C). Rainfall in spring varies from 2.09" (53mm) in March to 1.73" (44mm) in May. Spring also brings increased daylight hours with May boasting 15.3 hours of daylight.Summer weather in Libby
Summers in Libby, spanning from June to August, are marked by warm temperatures with highs reaching up to 77.4°F (25.2°C) in July. Summers are the driest period of the year, with August recording only 0.43" (11mm) of rainfall. The summer period is also blessed with abundant sunshine, from 9.8 hours in June up to 11.6 hours in both July and August.Autumn weather in Libby
Autumn in Libby involves a notable drop in temperature. Starting from 66°F (18.9°C) in September, it dips to 49.6°F (9.8°C) in October and further down to 36°F (2.2°C) in November. While September sees a moderate rainfall of 0.91" (23mm), it slightly increases to 1.57" (40mm) in November. As autumn progresses, the cloud% increases from 26 in September to 56 in November.Winter weather in Libby
Finally, winter in Libby is a season of cold and snow. December being the coldest, records an average low temperature of 27.1°F (-2.7°C) and a high of 77.5°F (25.3°C). Snowfall is also significant in this period, with December and January witnessing over 11" (279mm) of snow. Winter days are the shortest with December having only 8.4 hours of daylight. However, despite the cold, winter offers clear skies with a visibility of up to 5 miles in December and up to 4 miles in January.Weather in January
In Libby, Montana, January is characterized by its frigid climate and high humidity, making it one of the most challenging months for outdoor activities. The weather during this time is colder compared to the coming month of February. Weather in January »Weather in February
In contrast to January, February's climate in Libby, Montana, sees an uptick in temperature, but still remains relatively cold. Compare to the next month, it is colder with less rainfall thus characterized by lesser outdoor activities. Weather in February »Weather in March
March brings noticeable changes in weather conditions in Libby, Montana, as it transitions from the sharp cold of February to slightly warmer temperatures. Both rain and snow occur during this month, with snowfall reducing drastically compared to the earlier months. Weather in March »Weather in April
The weather in Libby, Montana, begins to improve significantly in April with the arrival of spring. The colder temperatures from March begin to rise, and the city experiences a significant drop in snowfall, measuring just about 2.36" (60mm). Weather in April »Weather in May
May marks the departure of the cold and the advent of milder and more pleasant weather conditions in Libby, Montana. As the month progresses, the high temperature levels begin to escalate, distinguishing it from the cooler climate of April. Weather in May »Weather in June
June creates a stark contrast to May in Libby, Montana, with longer daylight hours and high levels of sunshine dominating the month. The temperature hits a new high compared to the preceding months, suggesting the commencement of summer. Weather in June »Weather in July
Being the warmest month in Libby, Montana, July shines in its summer glory with high temperature readings and longer sunshine hours. The conditions are distinctly different from the mild weather of June. When it comes to rainfall, July records the least rainfall of the year with just 0.55" (14mm) over 7.1 days. Weather in July »Weather in August
August upholds the warm trend set by July in Libby, Montana, with a slight increase in temperature. However, the warmth begins to dip towards the end of the month, setting the stage for the approaching fall season. Rainfall augments slightly from 0.43" (11mm) but continues to record one of the lowest readings in the year. Weather in August »Weather in September
In Libby, Montana, September sings the melody of early fall with a drop in temperature compared to August. In contrast to the high temperature and prolonged sunshine hours of the earlier summer months, September experiences a gradual decline. Weather in September »Weather in October
October presents a drastic fall in temperature in Libby, Montana, as compared to September's moderate climate. As the month progresses, weather conditions begin to resemble the early onset of winter. The arrival of October brings a considerable increase in rainfall, up to 1.57" (40mm) spread across 13.1 days. Weather in October »Weather in November
November in Libby, Montana, brings the chill of winter along with a notable increase in snowfall, amounting to 5.16" (131mm). This time of the month compares to October by being considerably colder with rising humidity levels. Weather in November »Weather in December
December witnesses the reappearance of winter's peak in Libby, Montana, with average high temperatures plummeting further down. The stark contrast in temperatures between December and the prior month of November amplifies the onset of winter. Weather in December »Updated: Feb 13, 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 94%.
Throughout the year, in Libby, Montana, there are 138.8 rainfall days, and 18.15" (461mm) of precipitation is accumulated.
January through May, September through December are months with snowfall in Libby.
January is the month with the most snowfall in Libby, Montana. Snow falls for 18.1 days and accumulates 11.34" (288mm) of snow.
In Libby, Montana, during the entire year, snow falls for 91.8 days and aggregates up to 49.33" (1253mm) of snow.
The month with the least sunshine is January, with an average of 3h of sunshine.
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Libby, Montana, 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 Libby, Montana, snow does not fall in June through August.
June has the longest days of the year, with an average of 16h and 0min of daylight.
The months with the highest UV index are June and July, with an average maximum UV index of 5.
The months with the most sunshine are July and August, with an average of 11.6h of sunshine.
August brings the highest temperatures in Libby, Montana, with an average high of 77.5°F (25.3°C) and an average low of 47.3°F (8.5°C).
August is the least humid month in Libby, Montana, with an average relative humidity of 53%.
The month with the least rainfall in Libby is August, when the rain falls for 5.9 days and typically collects 0.43" (11mm) of precipitation.
December, with its high-temperature average of 27.1°F (-2.7°C) and a low-temperature average of 15.1°F (-9.4°C), is the coldest month in Libby.
The month with the most rainfall is December, when the rain falls for 9.6 days and typically aggregates up to 2.24" (57mm) of precipitation.
The month with the shortest days in Libby is December, with an average of 8h and 24min of daylight.
Average temperature
Libby, MT
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is December (27.1°F).
The month with the highest average low temperature is August (47.3°F).
The coldest month (with the lowest average low temperature) is December (15.1°F).
Average pressure
Libby, MT
- Average pressure in January:
30.18"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.94"Hg - Average pressure in August:
29.93"Hg - Average pressure in September:
29.98"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.17"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Libby, MT
- Average wind speed in January:
3.6mph - Average wind speed in February:
3.7mph - Average wind speed in March:
4.2mph - Average wind speed in April:
4.5mph - Average wind speed in May:
4.3mph - Average wind speed in June:
4.5mph
- Average wind speed in July:
4.3mph - Average wind speed in August:
4mph - Average wind speed in September:
3.9mph - Average wind speed in October:
3.8mph - Average wind speed in November:
3.9mph - Average wind speed in December:
3.5mph
The windiest months (with the highest average wind speed) are April and June (4.5mph).
The calmest month (with the lowest average wind speed) is December (3.5mph).
Average humidity
Libby, MT
The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (53%).
Average rainfall
Libby, MT
- Average rainfall in January:
2.05" - Average rainfall in February:
1.77" - Average rainfall in March:
2.09" - Average rainfall in April:
1.69" - Average rainfall in May:
1.73" - Average rainfall in June:
1.54"
- Average rainfall in July:
0.55" - Average rainfall in August:
0.43" - Average rainfall in September:
0.91" - Average rainfall in October:
1.57" - Average rainfall in November:
1.57" - Average rainfall in December:
2.24"
The wettest month (with the highest rainfall) is December (2.24").
The driest month (with the least rainfall) is August (0.43").
Average rainfall days
Libby, MT
- Average rainfall days in January:
9.4 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
17.1 days - Average rainfall days in April:
17.5 days - Average rainfall days in May:
15.8 days - Average rainfall days in June:
14.2 days
- Average rainfall days in July:
7.1 days - Average rainfall days in August:
5.9 days - Average rainfall days in September:
8.5 days - Average rainfall days in October:
13.1 days - Average rainfall days in November:
12.8 days - Average rainfall days in December:
9.6 days
The month with the highest number of rainy days is April (17.5 days).
The month with the least rainy days is August (5.9 days).
Average snowfall
Libby, MT
- Average snowfall in January:
11.34" - Average snowfall in February:
10.71" - Average snowfall in March:
6.57" - Average snowfall in April:
2.36" - Average snowfall in May:
0.2" - Average snowfall in June:
0"
The month with the highest snowfall is January (11.34").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Libby, MT
- Average snowfall days in January:
18.1 days - Average snowfall days in February:
18.1 days - Average snowfall days in March:
14.3 days - Average snowfall days in April:
5.8 days - Average snowfall days in May:
0.9 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:
2.5 days - Average snowfall days in November:
11.7 days - Average snowfall days in December:
20 days
The month with the highest number of snowfall days is December (20 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Libby, MT
- Average daylight in January:
8h and 54min - Average daylight in February:
10h and 12min - Average daylight in March:
11h and 54min - Average daylight in April:
13h and 42min - Average daylight in May:
15h and 12min - Average daylight in June:
16h and 0min
- Average daylight in July:
15h and 36min - Average daylight in August:
14h and 18min - Average daylight in September:
12h and 36min - Average daylight in October:
10h and 48min - Average daylight in November:
9h and 12min - Average daylight in December:
8h and 24min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in January:
3h and 0min - Average sunshine in February:
4h and 6min - Average sunshine in March:
5h and 24min - Average sunshine in April:
7h and 48min - Average sunshine in May:
9h and 48min - Average sunshine in June:
10h and 12min
- Average sunshine in July:
11h and 36min - Average sunshine in August:
11h and 36min - Average sunshine in September:
9h and 0min - Average sunshine in October:
6h and 24min - Average sunshine in November:
4h and 42min - Average sunshine in December:
3h and 30min
The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days
Libby, MT
- Average sunshine days in January:
10.8 days - Average sunshine days in February:
7.4 days - Average sunshine days in March:
7.5 days - Average sunshine days in April:
9.3 days - Average sunshine days in May:
13.3 days - Average sunshine days in June:
13.7 days
- Average sunshine days in July:
22.7 days - Average sunshine days in August:
22.8 days - Average sunshine days in September:
19.5 days - Average sunshine days in October:
15.4 days - Average sunshine days in November:
9.8 days - Average sunshine days in December:
8.6 days
The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (7.4 days).
Average UV index
Libby, MT
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover
Libby, MT
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility
Libby, MT
The months with the highest visibility are May, June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).
