Gallatin County Weather Forecast
Gallatin County weather: 32°F, fog. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Will it rain in Gallatin County?
Yes - rain is likely in Gallatin County today.
A 66% chance means rain is expected over most of the area. Plan indoor alternatives.
Over the next 7 days, about 1,2 in of precipitation is forecast, with the wettest days falling on Mon and Tue.
The next 7 days carry about 2.8 times a normal week's rain for October (1,2 in against 0,4 in).
16-day forecast for Gallatin County
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Mon, Oct 26 | 🌨️ Snow | 37° / 25° | 66% · 0,1 in | 9 mph | 3 |
| Tue, Oct 27 | 🌨️ Snow | 46° / 33° | 55% · 0,2 in | 15 mph | 3 |
| Wed, Oct 28 | ☁️ Overcast | 51° / 33° | 2% | 10 mph | 4 |
| Thu, Oct 29 | ☁️ Overcast | 54° / 35° | 0% | 10 mph | 4 |
| Fri, Oct 30 | 🌦️ Light drizzle | 56° / 39° | 25% · 0,0 in | 9 mph | 3 |
| Sat, Oct 31 | 🌦️ Light drizzle | 51° / 39° | 27% · 0,0 in | 7 mph | 3 |
| Sun, Nov 1 | 🌦️ Light showers | 42° / 31° | 34% · 0,9 in | 7 mph | 1 |
| Mon, Nov 2 | 🌨️ Snow | 33° / 28° | 33% · 0,3 in | 10 mph | 2 |
| Tue, Nov 3 | ☁️ Overcast | 37° / 23° | 16% | 8 mph | 4 |
| Wed, Nov 4 | 🌥️ Fog | 38° / 26° | 10% | 7 mph | 3 |
| Thu, Nov 5 | 🌥️ Fog | 42° / 31° | 8% | 8 mph | 3 |
| Fri, Nov 6 | 🌥️ Fog | 47° / 35° | 8% | 10 mph | 3 |
| Sat, Nov 7 | 🌧️ Rain | 57° / 40° | 24% · 0,3 in | 11 mph | 3 |
| Sun, Nov 8 | 🌧️ Rain | 51° / 38° | 27% · 0,3 in | 14 mph | 3 |
| Mon, Nov 9 | ☁️ Overcast | 50° / 36° | 23% | 17 mph | 2 |
| Tue, Nov 10 | 🌦️ Light drizzle | 52° / 37° | 23% · 0,0 in | 19 mph | 3 |
What this means for Gallatin County
Today is much colder than average for October. The forecast high of 37°F is 18.7°F below the 56°F typical for this month.
A 66% chance means rain is expected over most of the area. Plan indoor alternatives.
Visibility is down to 0,2 mi - use low beams and leave extra following distance. Overnight lows near 25°F mean ice is possible on bridges before dawn. Wet roads are likely; braking distances roughly double in heavy rain.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 78°F.
What to pack, what to skip
- A warm mid-layer and gloves for early mornings and evenings
- Insulated outer layer, hat and boots with grip for ice
- A packable rain shell - 2 of the next 7 days carry a real chance of rain
- Avoid high-elevation trails without traction devices - frozen surfaces persist in shade all day.
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
See the Gallatin County forecast by time range
Gallatin County weather - more answers
Explore Gallatin County
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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 32°F (-0°C) with fog. Humidity is 100% and wind is 7 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 12:06 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 27, 2026 at 12:06 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
