Boulder is a quaint and beautiful town located in Sublette County, Wyoming, United States. Situated in the western part of the state, Boulder is surrounded by stunning mountain ranges, including the Wind River Range to the north and the Gros Ventre Range to the west, offering residents and visitors alike breathtaking views and ample opportunities for outdoor recreation. The town is located along the Boulder River, a tributary of the Green River, which flows through the heart of the community, providing both scenic beauty and recreational opportunities. Boulder is a small and tight-knit community with a population of approximately 170 residents, fostering a friendly and welcoming atmosphere where neighbors know each other by name and come together to celebrate local events and traditions. While Boulder may be small in size, it boasts a rich history and vibrant culture, with many historic buildings and landmarks scattered throughout the town, including the historic Boulder Store and the Boulder Cemetery, providing a glimpse into the area’s past.
Climate and Weather Overview
Boulder, Wyoming, experiences a cold semi-arid climate with long, cold winters and short, mild summers. The town’s high elevation, sitting at around 7,400 feet (2,256 meters) above sea level, contributes to its unique climate and weather patterns, with temperature variations throughout the year and relatively low precipitation. Below is a detailed overview of Boulder’s climate and weather, including average temperature, precipitation, and sunny days for each month.
Average Monthly Climate Data
| Month | Average Temperature (°F) | Precipitation (inches) | Sunny Days |
| January | 22 | 0.50 | 20 |
| February | 26 | 0.50 | 22 |
| March | 34 | 0.60 | 25 |
| April | 44 | 0.70 | 26 |
| May | 54 | 1.00 | 27 |
| June | 64 | 0.90 | 28 |
| July | 71 | 0.80 | 28 |
| August | 69 | 0.70 | 27 |
| September | 60 | 0.70 | 25 |
| October | 48 | 0.60 | 23 |
| November | 34 | 0.50 | 20 |
| December | 25 | 0.50 | 19 |
Weather by Month
January
January in Boulder is characterized by cold temperatures and occasional snowfall. The average temperature hovers around 22°F (-5.6°C), with minimal precipitation averaging 0.50 inches. Outdoor activities during this month may be limited due to the cold weather and snow accumulation, but residents can still enjoy winter sports such as skiing, snowboarding, and snowshoeing.
Recommended Activities: Skiing or snowboarding at nearby ski resorts, snowshoeing in scenic areas, cozying up by the fireplace with a good book.
February
February brings similar weather conditions to January, with cold temperatures and occasional snow showers. The average temperature increases slightly to around 26°F (-3.3°C), while precipitation remains relatively low at 0.50 inches. Despite the cold weather, outdoor enthusiasts can still enjoy winter activities such as ice fishing, snowmobiling, and winter hiking.
Recommended Activities: Ice fishing on nearby lakes and rivers, snowmobiling on groomed trails, exploring winter hiking trails.
March
March marks the transition to spring in Boulder, with milder temperatures and longer daylight hours. The average temperature rises to around 34°F (1.1°C), while precipitation increases slightly to 0.60 inches. Outdoor activities such as hiking, wildlife viewing, and photography become more popular as residents and visitors embrace the arrival of spring.
Recommended Activities: Hiking in local parks and trails, wildlife viewing in natural areas, photography outings to capture the changing landscape.
April
April brings pleasant weather to Boulder, with warmer temperatures and blooming wildflowers. The average temperature increases to around 44°F (6.7°C), while precipitation remains relatively low at 0.70 inches. Outdoor activities such as birdwatching, fishing, and camping are popular as residents and visitors enjoy the beauty of springtime in the mountains.
Recommended Activities: Birdwatching in local birding hotspots, fishing in nearby streams and rivers, camping in scenic campgrounds.
May
May is a delightful time to visit Boulder, with mild temperatures and abundant sunshine. The average temperature rises to around 54°F (12.2°C), while precipitation increases slightly to 1.00 inch. Outdoor activities such as hiking, mountain biking, and rock climbing are popular as residents and visitors explore the stunning landscapes of the area.
Recommended Activities: Hiking to scenic viewpoints, mountain biking on local trails, rock climbing in designated areas.
June
June brings warm and sunny weather to Boulder, making it an ideal time for outdoor adventures. The average temperature increases to around 64°F (17.8°C), while precipitation remains relatively low at 0.90 inches. Outdoor activities such as camping, fishing, and whitewater rafting are popular as residents and visitors enjoy the longer days and warmer temperatures.
Recommended Activities: Camping in local campgrounds, fishing in nearby lakes and rivers, whitewater rafting on the Boulder River.
July
July is the warmest month in Boulder, with hot temperatures and plenty of sunshine. The average temperature peaks at around 71°F (21.7°C), while precipitation decreases slightly to 0.80 inches. Despite the heat, outdoor activities such as hiking, swimming, and kayaking are popular as residents and visitors seek relief from the summer sun.
Recommended Activities: Hiking to high elevation trails for cooler temperatures, swimming in local lakes and rivers, kayaking or canoeing on scenic waterways.
August
August brings continued warm and sunny weather to Boulder, making it an ideal time for outdoor adventures. The average temperature remains at around 69°F (20.6°C), while precipitation decreases to 0.70 inches. Outdoor activities such as camping, hiking, and wildlife viewing are popular as residents and visitors enjoy the last days of summer.
Recommended Activities: Camping in remote wilderness areas, hiking to alpine lakes, wildlife viewing in national parks and forests.
September
September marks the transition to fall in Boulder, with cooler temperatures and changing foliage. The average temperature drops to around 60°F (15.6°C), while precipitation remains relatively low at 0.70 inches. Outdoor activities such as leaf-peeping, hiking, and wildlife photography are popular as residents and visitors enjoy the vibrant colors of the season.
Recommended Activities: Leaf-peeping along scenic drives, hiking in national forests and parks, wildlife photography in natural areas.
October
October brings cooler temperatures and colorful foliage to Boulder, making it a popular time for outdoor activities. The average temperature drops to around 48°F (8.9°C), while precipitation decreases to 0.60 inches. Outdoor activities such as pumpkin patches, corn mazes, and scenic drives are popular as residents and visitors embrace the festive spirit of the season.
Recommended Activities: Visiting pumpkin patches and corn mazes, driving along scenic byways, enjoying fall festivals and events.
November
November is a transitional month in Boulder, with cooler temperatures and occasional snowfall. The average temperature drops to around 34°F (1.1°C), while precipitation increases to 0.50 inches. Despite the cooler weather, there are still plenty of outdoor activities to enjoy, including hiking, birdwatching, and exploring scenic drives.
Recommended Activities: Hiking in local parks and forests, birdwatching in designated areas, exploring scenic drives and overlooks.
December
December brings cold temperatures and occasional snowfall to Boulder, making it a festive time to visit the area. The average temperature drops to around 25°F (-3.9°C), while precipitation increases to 0.50 inches. Despite the cold weather, there are still plenty of holiday events and activities to enjoy, including festive parades, holiday markets, and seasonal decorations.
Recommended Activities: Enjoying holiday events and festivals, shopping for unique gifts, snowshoeing or cross-country skiing in nearby mountains.