Montana has a temperate climate with warm summers and freezing winters.
Montana has an average annual temperature of 41.9°F across all 6 cities, with approximately 574 mm of annual precipitation and average humidity of 70%. Temperatures peak in July and drop to their lowest in January, while rainfall is highest during spring and early summer months.
The warmest city is Billings with average July highs of 87.6°F, while Bozeman is the coldest with average January lows of 7.3°F. Humidity remains moderate throughout the year, especially during winter months, creating cold and damp conditions. These seasonal patterns make summer ideal for outdoor activities, while winters bring freezing conditions and heavy snowfall.
| Month | 🌤️ | Avg High | Avg Temp | Avg Low | Record High | Record Low | Humid % | Rain (mm) | Wind (m/s) | Solar (kWh/m²) |
|---|---|---|---|---|---|---|---|---|---|---|
| January | ❄️ | 28.9°F | 20.5°F | 12.2°F | 63.3°F | -38.4°F | 89% | 40 | 1.8 | 1.50 |
| February | ❄️ | 31.5°F | 22.3°F | 13.3°F | 67.6°F | -41.1°F | 85% | 38 | 1.8 | 2.50 |
| March | ❄️ | 41.2°F | 31.5°F | 21.9°F | 79.7°F | -29.7°F | 77% | 45 | 1.7 | 3.60 |
| April | 🌤️ | 50.2°F | 39.2°F | 28.4°F | 87.3°F | -4.4°F | 69% | 55 | 1.6 | 4.70 |
| May | 🌤️ | 60.8°F | 48.9°F | 36.9°F | 93.4°F | 11.8°F | 65% | 76 | 1.4 | 5.70 |
| June | 🌤️ | 70.0°F | 57.6°F | 45.1°F | 104.5°F | 21.2°F | 62% | 73 | 1.3 | 6.40 |
| July | ☀️ | 80.2°F | 66.6°F | 52.7°F | 108.7°F | 29.5°F | 53% | 38 | 1.1 | 7.00 |
| August | ☀️ | 79.7°F | 65.8°F | 51.8°F | 103.5°F | 26.6°F | 50% | 37 | 1.1 | 5.90 |
| September | 🌤️ | 68.9°F | 55.8°F | 42.8°F | 104.0°F | 14.2°F | 55% | 40 | 1.3 | 4.40 |
| October | 🌤️ | 53.6°F | 42.6°F | 31.8°F | 90.7°F | -8.9°F | 66% | 43 | 1.4 | 2.80 |
| November | ❄️ | 38.3°F | 30.2°F | 21.9°F | 75.6°F | -27.2°F | 78% | 44 | 1.6 | 1.60 |
| December | ❄️ | 28.6°F | 20.7°F | 12.9°F | 66.4°F | -45.6°F | 86% | 44 | 1.7 | 1.20 |
Showing average climate conditions across 45 years (1981–2025) · averaged across all 6 cities in Montana
🧥 Pack heavy layers and prepare for snow — this is a Severe Winter destination.
🌤️ Conditions are ideal for outdoor activities throughout the day in this Mild Summer.
☔ Rainfall is spread across the year with no sharply defined wet season.
Region-wide monthly averages across 6 cities · 1981–2025 · °F
Temperatures rise steadily from spring, peak in July, and gradually decline through autumn into winter.
These seasonal patterns make summer ideal for outdoor activities, while winters bring freezing conditions and heavy snowfall.
Region-wide monthly rainfall · 1981–2025 · mm/month
💧 Humidity peaks at 89% in January · annual avg 70%
Monthly averages · 1981–2025
Across 45 years, Montana's temperature shows a slight warming trend over the past decade. 2024 was the warmest year overall and 1985 the coolest.
The warmest year on record was 2024 (avg: 44.8°F), while the coldest year was 1985 (avg: 38.3°F).
Averaged across all 6 cities in Montana · Last 30 years · °F
Averaged across all 6 cities in Montana · Last 30 years · mm/year
🔥 hottest · ❄️ coldest · 🌧️ wettest
ℹ️ Values are averages across all 6 cities in Montana for each year.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|---|---|
2025 | 55.2°F | 44.4°F | 33.6°F | 100.0°F | -29.0°F | 602 | 69% | 1.4 m/s |
2024 🔥 | 55.6°F | 44.8°F | 34.0°F | 104.0°F | -35.0°F | 547 | 68% | 1.4 m/s |
2023 | 54.0°F | 43.5°F | 33.1°F | 101.3°F | -33.9°F | 600 | 71% | 1.4 m/s |
2022 | 52.9°F | 42.1°F | 31.1°F | 104.4°F | -41.8°F | 546 | 68% | 1.6 m/s |
2021 | 54.7°F | 43.7°F | 32.5°F | 106.0°F | -27.9°F | 474 | 66% | 1.5 m/s |
2020 | 53.1°F | 42.4°F | 31.8°F | 99.3°F | -10.8°F | 621 | 70% | 1.6 m/s |
2019 | 49.8°F | 39.6°F | 29.3°F | 97.5°F | -29.7°F | 620 | 75% | 1.4 m/s |
2018 | 51.3°F | 40.8°F | 30.6°F | 102.4°F | -21.1°F | 675 | 75% | 1.4 m/s |
2017 | 52.7°F | 42.1°F | 31.3°F | 101.3°F | -23.8°F | 651 | 70% | 1.5 m/s |
2016 | 54.1°F | 43.5°F | 32.7°F | 99.9°F | -31.2°F | 615 | 70% | 1.5 m/s |
Showing 1 to 10 of 45 years
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources), a NASA project providing solar and meteorological data for renewable energy, building efficiency, and agricultural research.
