Bonner, Montana Weather by Month

Bonner is a small, unincorporated community located in Missoula County in the state of Montana, USA. Nestled in the Rocky Mountains, Bonner is situated along the banks of the Blackfoot River, approximately 7 miles east of Missoula. This picturesque location provides residents and visitors with stunning mountain views and a wealth of outdoor recreational opportunities, making it a desirable place for nature enthusiasts and those seeking a tranquil lifestyle.

Geographically, Bonner is characterized by its mountainous terrain and dense forests, which are part of the larger Lolo National Forest. The community’s proximity to the Blackfoot River offers excellent opportunities for fishing, rafting, and kayaking. Bonner covers a modest area but is rich in natural beauty and outdoor activities.

As of the most recent census data, Bonner has a population of approximately 1,500 residents. Despite its small size, the community is known for its close-knit atmosphere and strong sense of local pride. The economy of Bonner has historically been tied to the timber industry, with the historic Bonner Mill being a significant landmark in the area. Although the mill is no longer operational, it remains a symbol of the community’s heritage.

Bonner is also home to several notable landmarks, including the Bonner School, which serves as the educational hub for the community, and the KettleHouse Amphitheater, a popular outdoor concert venue that attracts visitors from across the region. The town’s rich history and scenic surroundings make it a unique and appealing place to live and visit.

Climate and Weather Overview

Bonner, Montana, experiences a semi-arid climate with four distinct seasons. The climate is characterized by cold winters, mild springs, warm summers, and cool autumns. The weather in Bonner is influenced by its mountainous location, which can lead to significant variations in temperature and precipitation throughout the year.

Average Monthly Climate Data

Month Average Temperature (°F) Precipitation (inches) Sunny Days
January 23 1.1 10
February 28 0.8 11
March 36 1.2 12
April 46 1.1 15
May 55 1.9 18
June 64 2.1 20
July 72 1.2 24
August 71 1.0 23
September 61 1.2 19
October 48 1.1 15
November 34 1.2 10
December 24 1.4 9

Detailed Monthly Weather Overview


January in Bonner is characterized by cold temperatures and moderate snowfall. The average temperature hovers around 23°F, with nighttime lows often dipping below 15°F. Precipitation averages 1.1 inches, primarily in the form of snow. There are typically about 10 sunny days, offering brief respites from the winter gloom.

Natural disasters in January can include severe winter storms, which may bring heavy snowfall and strong winds, leading to hazardous driving conditions and potential power outages. Residents should be prepared with adequate winter supplies and stay updated on weather advisories.

Indoor activities are highly recommended during this month. Residents and visitors can enjoy cozy gatherings, local indoor events, or visit the Bonner School for community activities. Outdoor enthusiasts might brave the cold for activities like ice fishing or snowshoeing along the trails.


February sees a slight increase in average temperatures, rising to around 28°F. Precipitation remains similar to January, averaging 0.8 inches, with snow continuing to dominate. The number of sunny days stays relatively constant at 11.

Severe winter storms can still occur in February, necessitating caution and preparedness. However, the cold weather provides opportunities for winter sports such as ice skating and cross-country skiing.

Indoor activities remain a popular choice. Community events, indoor sports leagues, and visits to local cafés or museums can provide warmth and entertainment.


March marks the beginning of the transition to spring, with average temperatures rising to 36°F. Precipitation increases to 1.2 inches, with a mix of rain and snow. There are typically 12 sunny days, offering more opportunities for outdoor activities.

As winter wanes, the risk of severe storms decreases, but heavy snowfalls can still occur early in the month. Residents can start to enjoy outdoor walks and early spring gardening.

This month is great for both indoor and outdoor activities. Local events such as craft fairs and farmers’ markets begin to emerge, providing a taste of the warmer seasons to come.


April brings a significant warming trend, with average temperatures reaching 46°F. Precipitation averages 1.1 inches, primarily as rain, as the region fully transitions into spring. The number of sunny days rises to 15.

The risk of flooding increases with the spring thaw and increased rainfall. However, April is a beautiful month for outdoor activities, including hiking, birdwatching, and exploring local parks.

Residents and visitors can participate in outdoor festivals and enjoy the blooming flowers. It’s also a great time for picnics and family outings in the parks.


In May, temperatures continue to rise, averaging around 55°F. Precipitation increases to 1.9 inches, and there are about 18 sunny days, providing ample opportunity for outdoor activities.

The weather in May is ideal for gardening, with many residents planting their spring gardens. Outdoor activities such as cycling, hiking, and fishing become popular as the weather warms.

Local events such as farmers’ markets, community fairs, and outdoor concerts start to take place, offering a variety of activities for residents and visitors to enjoy.


June marks the beginning of summer, with average temperatures reaching 64°F. Precipitation remains moderate at 2.1 inches, and the number of sunny days increases to 20.

June is generally a pleasant month, with warm temperatures and frequent sunny days. Outdoor activities such as swimming, boating, and picnicking are highly recommended.

The town hosts various summer events, including outdoor movies and music festivals. It’s also a great time to explore the local trails and parks, enjoying the full bloom of summer flora.


July is the warmest month in Bonner, Montana, with average temperatures around 72°F. Precipitation averages 1.2 inches, and there are typically 24 sunny days.

The warm and dry weather is perfect for outdoor activities. Residents and visitors can enjoy swimming, fishing, and barbecues. It’s also a great time for hiking and exploring the local countryside.

Bonner celebrates Independence Day with a community fireworks display and various outdoor events. The warm evenings are perfect for outdoor dining and socializing.


In August, temperatures remain warm, averaging 71°F. Precipitation is slightly lower at 1.0 inches, and there are about 23 sunny days.

The weather remains ideal for outdoor activities. Water-based activities such as kayaking and paddleboarding are popular. The local parks and trails offer great opportunities for hiking and wildlife viewing.

August is a great month for family outings and picnics. The town often hosts summer festivals and fairs, providing entertainment for all ages.


September brings slightly cooler temperatures, averaging around 61°F. Precipitation remains moderate at 1.2 inches, and there are typically 19 sunny days.

The transition to autumn makes September a beautiful month for outdoor activities. The cooler temperatures are perfect for hiking, biking, and enjoying the changing foliage.

Local harvest festivals and farmers’ markets become more frequent, offering fresh produce and handmade goods. It’s also a great time for scenic drives and photography.


October sees further cooling, with average temperatures around 48°F. Precipitation averages 1.1 inches, and there are about 15 sunny days.

The fall colors reach their peak in October, making it a popular month for outdoor activities such as leaf-peeping, hiking, and hayrides. The cooler temperatures are also ideal for apple picking and visiting pumpkin patches.

Local Halloween events and fall festivals provide entertainment and community engagement. It’s a great month for outdoor photography and enjoying the crisp autumn air.


In November, temperatures drop to an average of 34°F. Precipitation averages 1.2 inches, primarily as rain and occasional snow. There are typically 10 sunny days.

As winter approaches, outdoor activities shift towards preparation for the colder months. Residents can enjoy late-season hikes and prepare their homes and gardens for winter.

November is also a time for indoor activities and holiday preparations. Community events such as Thanksgiving dinners and craft fairs provide warmth and entertainment.


December brings the onset of winter, with average temperatures around 24°F. Precipitation averages 1.4 inches, mostly as snow. There are about 9 sunny days.

The holiday season brings a festive atmosphere to Bonner. Outdoor activities include ice skating, sledding, and winter walks. The town often hosts holiday events and decorations, adding to the seasonal charm.

Indoor activities such as holiday baking, crafting, and visiting local shops are popular. It’s also a time for community gatherings and enjoying the warmth of home.

Natural Disasters and Recommended Activities

While Bonner, Montana, generally experiences mild weather, it is not entirely immune to natural disasters. The most common natural threats include severe winter storms, wildfires, and occasional flooding during the spring and summer.

January to March

During the first three months of the year, the primary natural threats are severe winter storms, which can bring heavy snow and ice. Residents should be prepared with winter supplies and stay informed about weather conditions.

Indoor activities such as visiting the Bonner School, attending community events, and enjoying cozy gatherings at home are recommended.

April to June

From April to June, the risk of flooding increases due to spring rains and the thawing of winter snow. Wildfires can also occur during dry periods.

Outdoor activities such as hiking, gardening, and exploring local parks are popular. Residents should stay aware of weather advisories and be prepared for sudden changes.

July to September

During the summer months, wildfires are the most common natural threat, often accompanied by dry and windy conditions. However, these months also offer the best weather for outdoor activities.

Swimming, boating, and picnicking are highly recommended. The town hosts various summer events, providing entertainment and community engagement.

October to December

As the year comes to a close, the risk of severe weather decreases. October and November can bring occasional storms, but December typically sees the return of winter weather.

Outdoor activities such as hiking, leaf-peeping, and holiday events are popular. Residents should prepare for winter and enjoy the festive season with indoor and outdoor holiday activities.


Bonner, Montana, offers a diverse and engaging climate year-round, with each season bringing its own unique charm and opportunities for activities. From the cold, snowy winters to the warm, sunny summers, residents and visitors can enjoy a wide range of outdoor and indoor activities throughout the year. By staying informed about weather conditions and being prepared for natural disasters, everyone can safely enjoy all that this picturesque community has to offer.

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