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Best time to visit · Montana, United States
On the climate data, the best time to visit Glacier National Park is July & August, scoring up to 97/100 with highs around 70°F (21°C) and 1.4 in (36 mm) of rain in July. September is a good shoulder-season month. The toughest months are March & April and November, mainly because of cool days.
Highs run from 21°F to 70°F across the year, and the yearly total is about 31.6 in (802 mm) of rain and snow.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 23°F-5°C | 23°F-5°C | 30°F-1°C | 39°F4°C | 52°F11°C | 60°F16°C | 70°F21°C | 69°F21°C | 59°F15°C | 44°F7°C | 30°F-1°C | 21°F-6°C |
| Avg low | 9°F-13°C | 7°F-14°C | 16°F-9°C | 23°F-5°C | 33°F1°C | 40°F5°C | 47°F8°C | 45°F7°C | 37°F3°C | 27°F-3°C | 18°F-8°C | 8°F-13°C |
| Rain/snow | 2.6 in66 mm | 2.3 in58 mm | 2.8 in70 mm | 2.8 in71 mm | 3.5 in88 mm | 4.4 in111 mm | 1.4 in36 mm | 1.7 in42 mm | 2.2 in55 mm | 2.4 in62 mm | 3.0 in76 mm | 2.6 in67 mm |
| Humidity | 95% | 95% | 91% | 84% | 75% | 75% | 67% | 63% | 67% | 78% | 89% | 95% |
| Cloud | 72% | 70% | 72% | 72% | 68% | 63% | 39% | 45% | 55% | 66% | 72% | 71% |
| Comfort | 43 | 45 | 42 | 42 | 62 | 74 | 97 | 95 | 81 | 51 | 42 | 43 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. The grid cell sits at about 1,634 m (5,361 ft), close to Glacier National Park's own ~1,657 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
The cold peaks here: highs of 21–23°F (-6–-5°C), and nights reach 7°F (-14°C). About 7.5 in (191 mm) of rain or snow falls across these months, 24% of the year's total. December – February are cold enough for snow. Comfort scores sit mid-table, averaging 44/100.
Temperatures climb through the season, from 30°F highs in March to 52°F by May. It's the wettest season, with about 9.0 in (229 mm) of rain or snow, 29% of the year's total. March & April are cold enough for snow. It holds the toughest stretch on our comfort score (March & April), averaging 49/100.
The warmest stretch of the year, with highs of 60–70°F (16–21°C). It's the driest season, with only about 7.4 in (189 mm) of rain, 24% of the year's total. Lows bottom out around 40°F (5°C). July & August are among the best-scoring months (season average 89/100).
Temperatures slide from 59°F highs in September to 30°F by November. About 7.6 in (193 mm) of rain or snow falls across these months, 24% of the year's total. October & November are cold enough for snow. It holds the toughest stretch on our comfort score (November), averaging 58/100.
By comfort score: 3 Great, 2 Good, 2 Fair and 5 Tough. Great months: July – September. Tap a month for its own guide.
On the climate data, the best time to visit Glacier National Park is July & August, scoring up to 97/100 with highs around 70°F (21°C) and 1.4 in (36 mm) of rain in July. September is a good shoulder-season month. The toughest months are March & April and November, mainly because of cool days.
June is the wettest month, averaging about 4.4 in (111 mm) of rain. July is the driest, with about 1.4 in (36 mm). The yearly total is around 31.6 in (802 mm).
February is the coldest, with average lows of 7°F (-14°C) and highs of 23°F (-5°C). The warmest is July, with average highs of 70°F (21°C).
Not very: summer (June – August) humidity averages 68%, and highs peak around 70°F (21°C), so it rarely feels sticky.
On average, yes: lows fall below 32°F (0°C) in October – April, bottoming out around 7°F (-14°C) in February.
Poll the group on July & August dates, then plan the days, packing and costs together.
