Best Time to Visit Gallatin County
Best time to visit Gallatin County: June, July, August and September. Month-by-month temperature, rainfall and crowd guidance.
Best time to visit Gallatin County
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.
Climate in Gallatin County 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 | 33° | 14° | 0,8 in | ★★☆☆☆ |
| February | 34° | 15° | 1,6 in | ★★☆☆☆ |
| March | 48° | 26° | 1,7 in | ★★★☆☆ |
| April | 53° | 29° | 2,8 in | ★★★☆☆ |
| May | 62° | 38° | 3,1 in | ★★★★☆ |
| June | 70° | 45° | 2,0 in | ★★★★☆ |
| July | 83° | 55° | 0,5 in | ★★★★★ |
| August | 80° | 52° | 0,6 in | ★★★★★ |
| September | 71° | 46° | 1,0 in | ★★★★☆ |
| October | 56° | 34° | 1,9 in | ★★★☆☆ |
| November | 43° | 25° | 1,0 in | ★★★☆☆ |
| December | 40° | 24° | 1,4 in | ★★☆☆☆ |
Climate type: Subarctic. Source: Open-Meteo archive (ERA5).
How Gallatin County compares with nearby places
Annual averages, and the difference against Gallatin County.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Bozeman | 0 mi | 45°F | about the same | 18 in |
| Missouri River | 79 mi | 46°F | +33°F warmer | 16 in |
| Yellowstone (UNESCO World Heritage Site) | 89 mi | 36°F | 41°F cooler | 25 in |
| Yellowstone National Park | 89 mi | 36°F | 41°F cooler | 25 in |
| Grand Teton National Park | 132 mi | 39°F | 38°F cooler | 30 in |
What to pack, what to skip
- Sunglasses, a brimmed hat and SPF 30+
- Layers - the daily swing is 70°F, so mornings feel nothing like afternoons
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
Summary
Gallatin County is a county in Montana. Gallatin County is a county in the United States. It has a population of about 125.000.
Right now it is 53°F (12°C) in Gallatin County with mainly clear. It feels like 47°F. Today runs from 44°F to 69°F. Chance of precipitation is 3%. Sightseeing conditions score 8.8/10 - excellent - go now.
The best time to visit Gallatin County 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 83°F, while January is the coldest with lows near 14°F.
Nearby highlights include Missouri River, Yellowstone (UNESCO World Heritage Site), Yellowstone National Park and Grand Teton National Park.
In plain terms. Today is warmer than average for October. The forecast high of 69°F is 13.9°F above the 56°F typical for this month. The best window to be outside is roughly 3 PM to 6 PM, when temperature, rain chance and wind line up best. photography is the strongest bet in Gallatin County today at 9.8/10. 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.
Weather in Gallatin County right now
Source: Open-Meteo. Updated 10:27 AM, Oct 1 local time.
Weekend outlook
☁️ 69° / 50°
Overcast · 0% rain · wind 10 mph
☁️ 76° / 49°
Overcast · 0% rain · wind 10 mph
Things to do in Gallatin County
Attractions, parks and landmarks in and around Gallatin County.
Quick facts about Gallatin County
| Type | County |
|---|---|
| State | Montana |
| Country | United States |
| Continent | North America |
| Coordinates | 45°40′37.2″N 111°2′34.4″W (45.677, -111.0429) |
| Population | 125.000 |
| Local time | 10:27 AM (UTC-06:00) |
| Best months | June, July, August and September |
| Climate | Subarctic |
Explore Gallatin County
Every topic we hold for this place, and the same topic for the places around it.
Best Time to Visit for related places
Frequently asked questions
Where is Gallatin County?
Gallatin County is a county in Montana. Its coordinates are 45.677, -111.0429. It lies in North America.
What is the weather like in Gallatin County right now?
It is currently 53°F (12°C) with mainly clear. Humidity is 66% and wind is 9 mph.
When is the best time to visit Gallatin County?
June, July, August and September offer the most comfortable conditions in Gallatin County, which has a subarctic climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is Gallatin County in?
Gallatin County observes America/Denver (UTC-06:00). The local time is 10:27 AM.
How many people live in Gallatin County?
Gallatin County has a population of approximately 125.000.
What are the top things to do in Gallatin County?
Popular options include Missouri River, Yellowstone (UNESCO World Heritage Site), Yellowstone National Park, Grand Teton National Park and Grand Teton.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (us-counties) - 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 October 1, 2026 at 10:27 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
