Brooks, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brooks, a community in Fergus County, Montana.
This Afternoon
54°F
Mostly Sunny
Mostly sunny. High near 54, with temperatures falling to around 45 in the afternoon. East wind around 3 mph.
7-day forecast for Brooks
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 54°F | Mostly Sunny | 3 mph E | 0% |
| Tonight | 32°F | Partly Cloudy | 3 mph S | 0% |
| Wednesday | 46°F | Mostly Sunny | 3 mph WSW | 0% |
| Wednesday Night | 32°F | Partly Cloudy | 3 mph SSW | 0% |
| Thursday | 54°F | Sunny | 3 mph WSW | 1% |
| Thursday Night | 32°F | Mostly Clear | 1 to 6 mph WSW | 1% |
| Friday | 53°F | Sunny | 6 to 12 mph SW | 4% |
| Friday Night | 36°F | Partly Cloudy | 8 to 14 mph WSW | 9% |
| Saturday | 52°F | Sunny | 5 to 16 mph W | 2% |
| Saturday Night | 36°F | Partly Cloudy | 7 mph SSW | 0% |
| Sunday | 63°F | Mostly Sunny | 8 mph SSW | 1% |
| Sunday Night | 38°F | Partly Cloudy | 3 to 8 mph WSW | 1% |
| Monday | 55°F | Partly Sunny | 5 mph WSW | 2% |
| Monday Night | 38°F | Mostly Cloudy | 6 mph S | 2% |
Forecast source: National Weather Service (api.weather.gov) for Brooks (47.205, -109.421). Updated through the day.
Growing snapshot for Brooks
Last spring frost
May 14
First fall frost
Sep 28
Growing season
135 days
Hardiness zone
4b
More local growing data for Brooks: nearby ZIP 59457 weather · frost dates · planting calendar · Montana frost dates
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Ayers Ranch Colony
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Lewistown
Lewistown Heights
Moore
Roy
Warm Spring Creek
Winifred
Climate data from the nearest NOAA station, Lewistown, Mt (6.7 mi from Brooks). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.