Butte Climate by Month
Butte, Montana, United States
Warm summers and freezing winters, with little rain.
Warm summers and freezing winters, with little rain: that's Butte's climate in short. Afternoon highs range from 31°F (0°C) in December to 81°F (27°C) in July, and December nights average 8°F (-13°C). It gets only 12 in (308 mm) of rain a year.
- Warmest month
- 81°F(27°C)
- Average high, July
- Coldest nights
- 8°F(-13°C)
- Average low, December
- Rain per year
- 12 in(308 mm)
- No clear rainy season
- Humidity
- 55%
- Sunniest: July
Best and worst months in Butte
Best for weatherJuly to September are the best time for weather in Butte: highs near 77°F (25°C) and about 1.0 in (26 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; January is the coldest, with highs of only 32°F (0°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in September.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Butte weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 32°F(0°C) | 9°F(-13°C) | 0.5 in(13 mm) | 80% | 1.4 |
| FebFebruary | 35°F(2°C) | 11°F(-11°C) | 0.5 in(12 mm) | 71% | 2.4 |
| MarMarch | 43°F(6°C) | 20°F(-7°C) | 0.7 in(19 mm) | 67% | 3.8 |
| AprApril | 51°F(11°C) | 26°F(-3°C) | 1.1 in(27 mm) | 50% | 4.6 |
| MayMay | 61°F(16°C) | 35°F(2°C) | 1.8 in(46 mm) | 52% | 5.7 |
| JunJune | 70°F(21°C) | 42°F(6°C) | 2.4 in(62 mm) | 52% | 6.1 |
| JulJulyBest | 81°F(27°C) | 48°F(9°C) | 1.1 in(27 mm) | 44% | 6.9 |
| AugAugustBest | 81°F(27°C) | 46°F(8°C) | 1.0 in(25 mm) | 40% | 6.0 |
| SepSeptemberBest | 70°F(21°C) | 39°F(4°C) | 1.1 in(27 mm) | 41% | 4.4 |
| OctOctober | 56°F(13°C) | 29°F(-2°C) | 0.8 in(20 mm) | 55% | 2.7 |
| NovNovember | 41°F(5°C) | 17°F(-8°C) | 0.6 in(16 mm) | 56% | 1.6 |
| DecDecember | 31°F(0°C) | 8°F(-13°C) | 0.6 in(14 mm) | 55% | 1.1 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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