Missouri River Climate and Average Weather
Climate of Missouri River: average temperatures, rainfall and seasons month by month.
Climate in Missouri River month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 32° | 14° | 1,0 in | ★★☆☆☆ |
| February | 34° | 13° | 1,6 in | ★★☆☆☆ |
| March | 49° | 27° | 1,7 in | ★★★☆☆ |
| April | 56° | 31° | 1,3 in | ★★★☆☆ |
| May | 65° | 40° | 2,5 in | ★★★★☆ |
| June | 73° | 47° | 1,9 in | ★★★★★ |
| July | 86° | 56° | 0,6 in | ★★★★★ |
| August | 82° | 53° | 0,7 in | ★★★★★ |
| September | 74° | 47° | 1,1 in | ★★★★★ |
| October | 58° | 35° | 1,1 in | ★★★★☆ |
| November | 45° | 26° | 1,0 in | ★★★☆☆ |
| December | 40° | 25° | 1,4 in | ★★☆☆☆ |
Climate type: Subarctic. Source: Open-Meteo archive (ERA5).
Recent extremes in Missouri River
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Missouri River compares with nearby places
Annual averages, and the difference against Missouri River.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Gallatin County | 79 mi | 45°F | 33°F cooler | 19 in |
| Bozeman | 79 mi | 45°F | 33°F cooler | 19 in |
| Yellowstone (UNESCO World Heritage Site) | 165 mi | 36°F | 42°F cooler | 25 in |
| Yellowstone National Park | 165 mi | 36°F | 42°F cooler | 25 in |
| Glacier National Park | 171 mi | 37°F | 41°F cooler | 42 in |
Best time to visit Missouri River
Go in June, July, August and September. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
What this means for Missouri River
Today is slightly warmer than average for August. The forecast high of 88°F is 6.8°F above the 82°F typical for this month.
A 56% chance means rain is likely somewhere nearby at some point - carry a layer, but do not cancel.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 81°F.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
Summary
Missouri River is a river in Montana. Missouri River is a river known as the longest river in North America.
Right now it is 69°F (20°C) in Missouri River with overcast. It feels like 69°F. Today runs from 65°F to 88°F. Chance of precipitation is 56%. Sightseeing conditions score 8.3/10 - good conditions.
The best time to visit Missouri River is June, July, August and September. The climate is subarctic. January, February and December tend to be the least comfortable months. July is the warmest month with average highs near 86°F, while February is the coldest with lows near 13°F.
Nearby highlights include Yellowstone (UNESCO World Heritage Site), Yellowstone National Park, Glacier National Park and Grand Teton National Park.
In plain terms. Today is slightly warmer than average for August. The forecast high of 88°F is 6.8°F above the 82°F typical for this month. The best window to be outside is roughly 9 AM to 12 PM, when temperature, rain chance and wind line up best. fishing is the strongest bet in Missouri River today at 9.5/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Missouri River
| Type | River |
|---|---|
| State | Montana |
| Country | United States |
| Continent | North America |
| Coordinates | 46°35′20.8″N 112°2′20.8″W (46.5891, -112.0391) |
| Length | 2.341 mi |
| Known for | the longest river in North America |
| Local time | 3:37 PM (UTC-06:00) |
| Best months | June, July, August and September |
| Climate | Subarctic |
Weather map for Missouri River
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore Missouri River
Every topic we hold for this place, and the same topic for the places around it.
Climate for related places
Frequently asked questions
Where is Missouri River?
Missouri River is a river in Montana. Its coordinates are 46.5891, -112.0391. It lies in North America.
What is the weather like in Missouri River right now?
It is currently 69°F (20°C) with overcast. Humidity is 68% and wind is 6 mph.
When is the best time to visit Missouri River?
June, July, August and September offer the most comfortable conditions in Missouri River, which has a subarctic climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is Missouri River in?
Missouri River observes America/Denver (UTC-06:00). The local time is 3:37 PM.
What are the top things to do in Missouri River?
Popular options include Yellowstone (UNESCO World Heritage Site), Yellowstone National Park, Glacier National Park, Grand Teton National Park and Grand Teton.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (rivers) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 23, 2026 at 3:37 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
