Yellowstone National Park is one of the most spectacular natural destinations in the United States, famous for its geysers, wildlife, and dramatic landscapes. However, its high elevation (most of the park sits above 7,000 feet / 2,100 meters) means weather can vary significantly throughout the year. Understanding Yellowstone’s weather by month is key to planning the perfect trip.
You can click the image below to view the full-size weather chart for Yellowstone National Park Weather by Month
January – Deep Winter
January is one of the coldest months in Yellowstone. Temperatures often range from -20°C to -5°C (-4°F to 23°F). Heavy snowfall blankets the park, creating a quiet, snowy wonderland.
- Best for: Snowshoeing, cross-country skiing
- Roads: Most are closed to regular vehicles
- Wildlife: Wolves and bison are easier to spot against the snow
February – Snowy and Serene
February remains extremely cold, but days start getting slightly longer. Snow conditions are excellent for winter activities.
- Average temps: -18°C to -3°C (0°F to 27°F)
- Highlights: Frozen waterfalls, steaming geysers in icy air
- Tip: Dress in layers and prepare for extreme cold
March – Winter Slowly Eases
March marks the transition from winter to spring, though snow is still dominant.
- Temps: -15°C to 2°C (5°F to 36°F)
- Conditions: Snowstorms still common
- Wildlife: Bears begin emerging late in the month
April – Unpredictable Spring
April weather is highly variable—sunshine, snow, and rain can all occur in one day.
- Temps: -5°C to 10°C (23°F to 50°F)
- Roads: Some begin reopening
- Wildlife: Baby bison and elk appear
May – Spring Awakens
May is a beautiful time as the park comes alive, but weather remains unpredictable.
- Temps: 0°C to 15°C (32°F to 59°F)
- Snow: Still possible, especially early in the month
- Best for: Wildlife viewing and fewer crowds
June – Early Summer
June brings milder temperatures and more accessible roads, though rain showers are frequent.
- Temps: 5°C to 20°C (41°F to 68°F)
- Conditions: Lush greenery, flowing rivers
- Crowds: Increasing as peak season begins
July – Warmest Month
July is the warmest and busiest month in Yellowstone.
- Temps: 10°C to 25°C (50°F to 77°F)
- Weather: Mostly sunny, occasional afternoon thunderstorms
- Best for: Hiking, camping, sightseeing
August – Peak Summer
August continues the warm weather, though conditions can become dry.
- Temps: 9°C to 24°C (48°F to 75°F)
- Risks: Wildfire smoke may occasionally affect visibility
- Tip: Book accommodations early
September – Fall Begins
September offers cooler temperatures and fewer crowds, making it one of the best months to visit.
- Temps: 3°C to 20°C (37°F to 68°F)
- Highlights: Fall colors, elk mating season (bugling)
- Weather: Crisp mornings, pleasant afternoons
October – Quiet and Cool
October sees a rapid drop in temperatures and fewer visitors.
- Temps: -2°C to 13°C (28°F to 55°F)
- Snow: Possible by late month
- Roads: Begin closing again
November – Winter Returns
November is a shoulder season with limited access.
- Temps: -10°C to 5°C (14°F to 41°F)
- Conditions: Snow begins accumulating
- Facilities: Many services close
December – Snowy Wonderland
December transforms Yellowstone into a magical winter landscape.
- Temps: -20°C to -5°C (-4°F to 23°F)
- Activities: Snowmobile tours, skiing
- Atmosphere: Quiet, peaceful, and scenic
Notes:
- Snowfall is significant from October through April, with peak accumulation in winter months.
- Summer (June–August) has minimal snow but some rainfall, often from afternoon thunderstorms.
- Temperatures can vary widely depending on elevation and time of day.
Yellowstone National Park Weather by Month
| Month | Avg High (°F / °C) | Avg Low (°F / °C) | Rainfall (inches) | Snowfall (inches) |
|---|---|---|---|---|
| January | 23°F / -5°C | 3°F / -16°C | 1.7 | 30.0 |
| February | 27°F / -3°C | 6°F / -14°C | 1.4 | 25.0 |
| March | 36°F / 2°C | 15°F / -9°C | 1.8 | 20.0 |
| April | 46°F / 8°C | 23°F / -5°C | 1.5 | 8.0 |
| May | 57°F / 14°C | 32°F / 0°C | 2.2 | 3.0 |
| June | 68°F / 20°C | 39°F / 4°C | 1.8 | 0.5 |
| July | 77°F / 25°C | 46°F / 8°C | 1.2 | 0.0 |
| August | 75°F / 24°C | 44°F / 7°C | 1.1 | 0.0 |
| September | 64°F / 18°C | 36°F / 2°C | 1.3 | 1.0 |
| October | 51°F / 11°C | 27°F / -3°C | 1.2 | 5.0 |
| November | 34°F / 1°C | 15°F / -9°C | 1.5 | 15.0 |
| December | 24°F / -4°C | 5°F / -15°C | 1.6 | 28.0 |
Best Time to Visit Yellowstone
- For warm weather & full access: June to August
- For fewer crowds & wildlife: May and September
- For winter experiences: December to February
20 helpful FAQs about weather in Yellowstone National Park
1. What is the best month to visit Yellowstone for good weather?
July and August offer the warmest temperatures and the most accessible roads and trails.
2. Is Yellowstone cold year-round?
Yes, due to its high elevation, temperatures can be cool even in summer, especially at night.
3. Does it snow in Yellowstone during summer?
Yes, snow is possible in June and even early September, though it’s usually light and short-lived.
4. What is the coldest month in Yellowstone?
January is typically the coldest month, with temperatures often dropping well below freezing.
5. What is the hottest month in Yellowstone?
July is usually the warmest month, with daytime highs around 25°C (77°F).
6. How unpredictable is Yellowstone weather?
Very unpredictable—conditions can change rapidly within hours, including sudden rain, snow, or temperature drops.
7. Does Yellowstone get a lot of rain?
Rainfall is moderate, with late spring and early summer (May–June) being the wettest periods.
8. When does snowfall start in Yellowstone?
Snow can begin as early as September and becomes more consistent by October.
9. How much snow does Yellowstone get in winter?
The park receives heavy snowfall, often exceeding several feet, especially between December and February.
10. Are roads open year-round in Yellowstone?
No, most roads close in winter due to snow and reopen gradually in spring.
11. What should I wear in Yellowstone?
Layered clothing is essential year-round, including a waterproof jacket and warm layers.
12. Is Yellowstone windy?
Yes, wind is common and can make temperatures feel colder, especially in open areas.
13. Can I visit Yellowstone in winter?
Yes, but access is limited. Winter visits are best for snow-based activities like skiing and snowmobiling.
14. When is the least crowded time weather-wise?
April and October have fewer visitors, but weather can be unpredictable and some facilities may be closed.
15. Does elevation affect weather in Yellowstone?
Absolutely. Higher elevations are colder and can receive more snow than lower areas.
16. Are thunderstorms common in Yellowstone?
Yes, especially in summer afternoons, often brief but sometimes intense.
17. What is spring weather like in Yellowstone?
Spring (April–May) is a mix of snow, rain, and sunshine, with rapidly changing conditions.
18. What is fall weather like in Yellowstone?
Fall (September–October) brings cooler temperatures, crisp air, and occasional early snowfall.
19. Is it safe to travel during winter weather?
It can be challenging due to snow and ice, so proper planning and guided tours are recommended.
20. How should I prepare for Yellowstone weather?
Check forecasts frequently, pack for all conditions, and be flexible with your itinerary.
Final Thoughts
Weather in Yellowstone National Park can change rapidly at any time of year. Even in summer, nights can be chilly, and sudden storms are common. The key to enjoying Yellowstone is preparation—pack layers, check forecasts, and stay flexible with your plans.