Bonner-West Riverside, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bonner-West Riverside, a community in Missoula County, Montana.
Live forecast is briefly unavailable; the local growing information below is from NOAA climate normals.
Growing snapshot for Bonner-West Riverside
Last spring frost
May 10
First fall frost
Oct 1
Growing season
143 days
Hardiness zone
5b
More local growing data for Bonner-West Riverside: nearby ZIP 59851 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Alberton
Arlee
Condon
Cyr
East Missoula
Evaro
Frenchtown
Huson
Lolo
Missoula
Orchard Homes
Piltzville
Potomac
Seeley Lake
Turah
Twin Creeks
Wye
Climate data from the nearest NOAA station, Missoula 2 Ne, Mt (4.7 mi from Bonner-West Riverside). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.