Harman US

Geyser, MT Weather & Growing Conditions

This Afternoon
62°F
Chance Light Rain
A chance of rain. Cloudy. High near 62, with temperatures falling to around 59 in the afternoon. Southeast wind around 7 mph. Chance of precipitation is 30%.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 62°F Chance Light Rain 7 mph SE 30%
Tonight 46°F Slight Chance Light Rain then Mostly Cloudy 2 to 7 mph SSW 16%
Sunday 70°F Mostly Sunny 2 to 7 mph SSE 6%
Sunday Night 46°F Mostly Clear 3 to 7 mph S 0%
Monday 77°F Sunny 5 mph SW 1%
Monday Night 50°F Mostly Clear 7 mph S 0%
Tuesday 79°F Sunny 6 mph W 0%
Tuesday Night 53°F Partly Cloudy 6 mph SW 1%
Wednesday 78°F Mostly Sunny 3 to 7 mph WSW 1%
Wednesday Night 53°F Partly Cloudy 5 to 8 mph WSW 4%
Thursday 78°F Sunny 6 to 9 mph SSW 2%
Thursday Night 52°F Mostly Clear 9 mph SE 5%
Friday 78°F Mostly Sunny 8 mph SSW 6%
Friday Night 48°F Partly Cloudy 10 mph SW 13%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Geyser, MT

Last spring frost
May 22
First fall frost
Sep 23
Growing season
123 days
Hardiness zone
4b

Explore more for Geyser, MT: full frost dates · planting calendar · Montana frost dates

Climate data from the nearest NOAA station, Raynesford 2 Nnw, Mt (13.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.