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United States weather

Weather in Gallatin County, Montana for October 2026

Your guide to Gallatin County weather in October - trends and predictions

    Snow Forecast ❄️

  • Gallatin County typically experiences moderate snowfall in October, with an average of 6 snowy days.
    According to Gallatin County snow forecast for October 2026, no snow is expected at the beginning of the month.

    • Temperatures

  • Expect cooler weather in first days of October 2026 in Gallatin County with the forecast suggesting a temperature of 20.2 °F, lower than the historical average.

  • In general, the average temperature in Gallatin County at the beginning of October is 17.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 7.7 °F by the end of October.

    • More

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Average dry days
19
Dry days
Average rainy days
6
Rainy days
Average snowy days
6
Snow days
Average temperatures
13°/2°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
56 %
Avg humidity

Gallatin County Weather October

Move between months or click on a day
September
November
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
23°
2
Sunny
23°
3
Sunny
18°
4
Sunny
16°
5
Sunny
9°
6
Sunny
15°
7
Sunny
20°
8
Cloudy
21°
9
Sunny
24°
10
Patchy rain possible
20°
11
Overcast
19°
12
Overcast
12°
13
Sunny
9°
14
Sunny
16°
15
Sunny
14°
16
Partly cloudy
13°
17
Moderate or heavy rain shower
8°
18
Patchy moderate snow
6°
19
Cloudy
12°
20
Partly cloudy
12°
21
Overcast
15°
22
Patchy rain possible
12°
23
Patchy rain possible
12°
24
Patchy rain possible
12°
25
Sunny
13°
26
Sunny
10°
27
Overcast
9°
28
Overcast
4°
29
Patchy rain possible
7°
30
Sunny
5°
31
Overcast
6°

Temperatures trend during October in Gallatin County

See the weather trend as well as the moving average line

October weather in Gallatin County day by day

Click on a date for more information
September November
Date Weather Temperatures Rain Snow More
Oct. 1 Sunny
Sunny
 23° /4° 0 mm 0 cm
Oct. 2 Sunny
Sunny
 23° /7° 0 mm 0 cm
Oct. 3 Sunny
Sunny
 18° /2° 0 mm 0 cm
Oct. 4 Sunny
Sunny
 16° /3° 33.1 mm 0 cm
Oct. 5 Sunny
Sunny
 9° /1° 13.7 mm 7.4 cm
Oct. 6 Sunny
Sunny
 15° /3° 0 mm 0 cm
Oct. 7 Sunny
Sunny
 20° /4° 0 mm 0 cm
Oct. 8 Cloudy
Cloudy
 21° /5° 0 mm 0 cm
Oct. 9 Sunny
Sunny
 24° /7° 0 mm 0 cm
Oct. 10 Patchy rain possible
Patchy rain possible
 20° /7° 0.1 mm 0 cm
Oct. 11 Overcast
Overcast
 19° /6° 2 mm 0 cm
Oct. 12 Overcast
Overcast
 12° /4° 0.9 mm 0 cm
Oct. 13 Sunny
Sunny
 9° /0° 0 mm 0 cm
Oct. 14 Sunny
Sunny
 16° /2° 0 mm 0 cm
Oct. 15 Sunny
Sunny
 14° /4° 5.7 mm 2.3 cm
Oct. 16 Partly cloudy
Partly cloudy
 13° /3° 3.7 mm 0.6 cm
Oct. 17 Moderate or heavy rain shower
Moderate or heavy rain shower
 8° /-1° 6.6 mm 0.7 cm
Oct. 18 Patchy moderate snow
Patchy moderate snow
 6° /0° 2.9 mm 1.8 cm
Oct. 19 Cloudy
Cloudy
 12° /0° 7.8 mm 0 cm
Oct. 20 Partly cloudy
Partly cloudy
 12° /2° 0 mm 0 cm
Oct. 21 Overcast
Overcast
 15° /2° 0.2 mm 0 cm
Oct. 22 Patchy rain possible
Patchy rain possible
 12° /1° 0.2 mm 0 cm
Oct. 23 Patchy rain possible
Patchy rain possible
 12° /2° 2.2 mm 0 cm
Oct. 24 Patchy rain possible
Patchy rain possible
 12° /1° 5.7 mm 0 cm
Oct. 25 Sunny
Sunny
 13° /1° 0.3 mm 0 cm
Oct. 26 Sunny
Sunny
 10° /1° 0 mm 0 cm
Oct. 27 Overcast
Overcast
 9° /-1° 6.5 mm 4.7 cm
Oct. 28 Overcast
Overcast
 4° /-3° 0.3 mm 0 cm
Oct. 29 Patchy rain possible
Patchy rain possible
 7° /-4° 0.1 mm 0 cm
Oct. 30 Sunny
Sunny
 5° /-5° 0 mm 0 cm
Oct. 31 Overcast
Overcast
 6° /-5° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Gallatin County in October is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Gallatin County forecast closer to your planned date for the most up-to-date weather information.
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Gallatin County in October - FAQ

What are the expected maximum and minimum temperatures in Gallatin County during October?
Prepare for cooler days with highs just around 13° and colder nights, dipping below 2°.

How much rainfall should be expected in Gallatin County during October?
Moderate rainfall is anticipated in Gallatin County during October, with a total of 92 mm spread over approximately 6 days. Considering plans for rainy days is advisable.

Will it snow in Gallatin County in October 2026?
Gallatin County experiences an average snowfall of 17.6 cm during October, occurring over 6 days.

What are the typical wind conditions in Gallatin County during October?
The average wind speed in Gallatin County during October is 14 km/h, suggesting breezy to windy conditions, depending on your activities.

Gallatin County snow forecast October 2026

Track daily snowfall levels and discover Gallatin County’s snowy potential this October ❄️
On average, Gallatin County sees 6 snowy days during October, with approximately 17.6 cm of total snowfall.

October rainfall patterns in Gallatin County

Explore the daily rainfall trends and prepare for Gallatin Countys October weather 💧
Typically, Gallatin County has 6 rainy days in October with a total of 92 mm of rainfall.

UV exposure in Gallatin County during October

Stay informed about UV levels for safe outdoor activities throughout the month of October ☀️
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Location coordinates Where is Gallatin County?

Get accurate weather forecasts for Gallatin County, located at latitude 45.68 and longitude -111.039. Stay updated with localized weather information tailored for Gallatin County.

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