Do you need to know, when is the best time to go to Montana? Then you should take a look here, what weather you can expect there during the year.
Montana is part of USA - United States of America. The climate of USA is very varied, as United States of America is a large country. The climate is mostly temperate, but tropical in Hawaii and Florida, and arctic in Alaska. This is not all. The climate is semiarid in the great plains west of the Mississippi River, and arid in the Great Basin of the southwest. You can expect low winter temperatures in the northwest, but they are sometimes moderated in January and February by warm winds. Winters in the south are warmer. Don? forget, that temperatures are usually significantly lower in mountains.
When speaking about the usual weather in this area, the information is relevant for example for these popular places: Anaconda, Babb, Belgrade, Big Sky, Big Timber, Billings, Bozeman, Browning, Butte, Colstrip, Columbia Falls, Cooke City, Crow Agency, Custer Country, Cut Bank, Deer Lodge, Dillon, East Glacier, Essex, Forsyth, Fort Peck, Gardiner, Glacier National Park, Glendive, Gold West Country, Great Falls, Havre, Helena, Hungry Horse, Huntley, Kalispell, Laurel, Lewistown, Libby, Livingston, Malta, Miles City, Missoula, Missouri River Country, Nevada City, Northwestern Montana, Plentywood, Polebridge, Polson, Ravalli, Red Lodge, Russell Country, Scobey, Shelby, Sidney, St. Mary, Sun River, Superior, Sweetgrass, Thompson Falls, Three Forks, Troy, Upper Missouri River Breaks National Monument, Virginia City, West Glacier, West Yellowstone, Whitefish, Yellowstone Country.
Let's look now what weather you can expect in the area around Billings and in many other cities. The warmest month here is July, the average maximum temperature is 31.5 ℃ (88.7 ℉). The average minimum temperature in this month is 13.7 ℃ (56.66 ℉). The coldest month here is December, the average maximum temperature is 4.1 ℃ (39.38 ℉). The average minimum temperature in this month is -9 ℃ (15.8 ℉). The most rainy month here is June, the average number of rainy days is 9.8. The least rainy month here is February, the average number of rainy days is 4.1. 
When travelling around Montana, always consider the altitude of the the place as well. We should remind you, that the highest point in USA - United States of America is Denali (Mount McKinley) (6190 m) and the lowest point is Death Valley (-86 m). So there are huge differences in altitudes in this country and the weather is very different in them therefore. Keep in mind, that the temperature usually decreases by 1.2 - 1.9 ℃ (2.2 - 3.5 ℉) per 200 m (656 ft), depending on the other conditions. (And we should add, that in the very special condition named thermal inversion even the temperature may be higher in higher altitudes.)
Typical (usual) weather in Montana in January is this: The average highest temperature in Montana in January is 5 ℃ (41 ℉). The average lowest temperature is -8.8 ℃ (16.16 ℉). At the beginning of January you can expect lower temperatures, the average highest temperature is around 4.55 ℃ (40.19 ℉). At the end of January you can expect higher temperatures, the average highest temperature is around 6.3 ℃ (43.34 ℉). The average number of rainy days in January is 4.3. The average rainfall is 11.8 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 8:43 (hours and minutes), in the middle of the month 9:04 and at the end of the month 9:38.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Montana in February is this: The average highest temperature in Montana in February is 7.6 ℃ (45.68 ℉). The average lowest temperature is -7 ℃ (19.4 ℉). At the beginning of February you can expect lower temperatures, the average highest temperature is around 6.3 ℃ (43.34 ℉). At the end of February you can expect higher temperatures, the average highest temperature is around 10 ℃ (50 ℉). The average number of rainy days in February is 4.1. The average rainfall is 12 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 9:38 (hours and minutes), in the middle of the month 10:20 and at the end of the month 11:07.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Montana in March is this: The average highest temperature in Montana in March is 12.4 ℃ (54.32 ℉). The average lowest temperature is -3.3 ℃ (26.06 ℉). At the beginning of March you can expect lower temperatures, the average highest temperature is around 10 ℃ (50 ℉). At the end of March you can expect higher temperatures, the average highest temperature is around 14.85 ℃ (58.73 ℉). The average number of rainy days in March is 5.9. The average rainfall is 24.4 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:07 (hours and minutes), in the middle of the month 11:55 and at the end of the month 12:44.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Montana in April is this: The average highest temperature in Montana in April is 17.3 ℃ (63.14 ℉). The average lowest temperature is 1.3 ℃ (34.34 ℉). At the beginning of April you can expect lower temperatures, the average highest temperature is around 14.85 ℃ (58.73 ℉). At the end of April you can expect higher temperatures, the average highest temperature is around 20.2 ℃ (68.36 ℉). The average number of rainy days in April is 7.8. The average rainfall is 42.3 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:44 (hours and minutes), in the middle of the month 13:32 and at the end of the month 14:16.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Montana in May is this: The average highest temperature in Montana in May is 23.1 ℃ (73.58 ℉). The average lowest temperature is 6.2 ℃ (43.16 ℉). At the beginning of May you can expect lower temperatures, the average highest temperature is around 20.2 ℃ (68.36 ℉). At the end of May you can expect higher temperatures, the average highest temperature is around 24.95 ℃ (76.91 ℉). The average number of rainy days in May is 9.2. The average rainfall is 56 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 14:16 (hours and minutes), in the middle of the month 14:55 and at the end of the month 15:25.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Montana in June is this: The average highest temperature in Montana in June is 26.8 ℃ (80.24 ℉). The average lowest temperature is 10.6 ℃ (51.08 ℉). At the beginning of June you can expect lower temperatures, the average highest temperature is around 24.95 ℃ (76.91 ℉). At the end of June you can expect higher temperatures, the average highest temperature is around 29.15 ℃ (84.47 ℉). The average number of rainy days in June is 9.8. The average rainfall is 57.8 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 15:25 (hours and minutes), in the middle of the month 15:41 and at the end of the month 15:41.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Montana in July is this: The average highest temperature in Montana in July is 31.5 ℃ (88.7 ℉). The average lowest temperature is 13.7 ℃ (56.66 ℉). At the beginning of July you can expect lower temperatures, the average highest temperature is around 29.15 ℃ (84.47 ℉). At the end of July you can expect lower temperatures, the average highest temperature is around 31.45 ℃ (88.61 ℉). The average number of rainy days in July is 6.2. The average rainfall is 36.7 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 15:41 (hours and minutes), in the middle of the month 15:24 and at the end of the month 14:53.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Montana in August is this: The average highest temperature in Montana in August is 31.4 ℃ (88.52 ℉). The average lowest temperature is 13.1 ℃ (55.58 ℉). At the beginning of August you can expect higher temperatures, the average highest temperature is around 31.45 ℃ (88.61 ℉). At the end of August you can expect lower temperatures, the average highest temperature is around 28.7 ℃ (83.66 ℉). The average number of rainy days in August is 4.7. The average rainfall is 19.6 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 14:53 (hours and minutes), in the middle of the month 14:14 and at the end of the month 13:30.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Montana in September is this: The average highest temperature in Montana in September is 26 ℃ (78.8 ℉). The average lowest temperature is 7.3 ℃ (45.14 ℉). At the beginning of September you can expect higher temperatures, the average highest temperature is around 28.7 ℃ (83.66 ℉). At the end of September you can expect lower temperatures, the average highest temperature is around 22.15 ℃ (71.87 ℉). The average number of rainy days in September is 6.1. The average rainfall is 35.1 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 13:30 (hours and minutes), in the middle of the month 12:43 and at the end of the month 11:55.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Montana in October is this: The average highest temperature in Montana in October is 18.3 ℃ (64.94 ℉). The average lowest temperature is 1.8 ℃ (35.24 ℉). At the beginning of October you can expect higher temperatures, the average highest temperature is around 22.15 ℃ (71.87 ℉). At the end of October you can expect lower temperatures, the average highest temperature is around 14.2 ℃ (57.56 ℉). The average number of rainy days in October is 6.3. The average rainfall is 35.3 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:55 (hours and minutes), in the middle of the month 11:07 and at the end of the month 10:21.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Montana in November is this: The average highest temperature in Montana in November is 10.1 ℃ (50.18 ℉). The average lowest temperature is -4.1 ℃ (24.62 ℉). At the beginning of November you can expect higher temperatures, the average highest temperature is around 14.2 ℃ (57.56 ℉). At the end of November you can expect lower temperatures, the average highest temperature is around 7.1 ℃ (44.78 ℉). The average number of rainy days in November is 4.9. The average rainfall is 15.8 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 10:21 (hours and minutes), in the middle of the month 9:39 and at the end of the month 9:05.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Montana in December is this: The average highest temperature in Montana in December is 4.1 ℃ (39.38 ℉). The average lowest temperature is -9 ℃ (15.8 ℉). At the beginning of December you can expect higher temperatures, the average highest temperature is around 7.1 ℃ (44.78 ℉). At the end of December you can expect higher temperatures, the average highest temperature is around 4.55 ℃ (40.19 ℉). The average number of rainy days in December is 4.5. The average rainfall is 13.6 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 9:05 (hours and minutes), in the middle of the month 8:44 and at the end of the month 8:40.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.| Billings | temperature: - | highest temperature: 4.1 ℃ (39.38 ℉) | lowest temperature: -9 ℃ (15.8 ℉) | rainfall: 13.6mm | rainy days: 4.5 |
| Great Falls | temperature: - | highest temperature: 1.6 ℃ (34.88 ℉) | lowest temperature: -9.4 ℃ (15.08 ℉) | rainfall: 13.9mm | rainy days: 7.6 |
| Helena | temperature: - | highest temperature: 0 ℃ (32 ℉) | lowest temperature: -10.9 ℃ (12.38 ℉) | rainfall: 10.3mm | rainy days: 6.5 |
| Bozeman | temperature: - | highest temperature: 1.4 ℃ (34.52 ℉) | lowest temperature: -10.6 ℃ (12.92 ℉) | rainfall: 23.1mm | rainy days: 9.8 |
| Butte | temperature: - | highest temperature: -1.2 ℃ (29.84 ℉) | lowest temperature: -14.8 ℃ (5.36 ℉) | rainfall: 13.1mm | rainy days: 7.6 |
| Missoula | temperature: - | highest temperature: -0.1 ℃ (31.82 ℉) | lowest temperature: -7.8 ℃ (17.96 ℉) | rainfall: 34.4mm | rainy days: 13.8 |