Ennis, MT Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Ennis, a town in Madison County, Montana.

This Afternoon

57°F

Showers And Thunderstorms

Showers and thunderstorms before 4pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 57. North wind 3 to 12 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.

7-day forecast for Ennis

When	Temp	Forecast	Wind	Precip
This Afternoon	57°F	Showers And Thunderstorms	3 to 12 mph N	86%
Tonight	42°F	Chance Showers And Thunderstorms then Areas Of Fog	0 to 12 mph NNW	31%
Sunday	67°F	Areas Of Fog then Mostly Sunny	0 to 5 mph WSW	3%
Sunday Night	41°F	Mostly Clear	5 mph S	1%
Monday	74°F	Sunny	1 to 5 mph SSW	0%
Monday Night	44°F	Mostly Clear	3 to 7 mph S	0%
Tuesday	77°F	Sunny	1 to 6 mph SSW	1%
Tuesday Night	47°F	Partly Cloudy	5 to 8 mph S	9%
Wednesday	77°F	Mostly Sunny	5 to 8 mph SSW	4%
Wednesday Night	47°F	Partly Cloudy	8 to 16 mph S	7%
Thursday	80°F	Sunny	10 to 15 mph S	1%
Thursday Night	48°F	Mostly Clear	15 to 21 mph S	2%
Friday	79°F	Mostly Sunny	10 to 17 mph S	2%
Friday Night	46°F	Mostly Cloudy	12 to 16 mph S	9%

Forecast source: National Weather Service (api.weather.gov) for Ennis (45.346, -111.731). Updated through the day.

Growing snapshot for Ennis

Last spring frost

Jun 16

First fall frost

Sep 4

Growing season

78 days

Hardiness zone

More local growing data for Ennis: nearby ZIP 59729 weather · frost dates · planting calendar · Montana frost dates

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Alder Big Sky Brandon Harrison Jeffers Mammoth McAllister Norris Pony Sheridan Silver Star Twin Bridges Virginia City

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Climate data from the nearest NOAA station, Ennis, Mt (3.1 mi from Ennis). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.