Environment Canada data presented here is representative of weather in those regions through which the highway passes.

DriveBC/ Environment Canada WeatherOffice Forecast Highway .
Forecast Issued: 4.00 PM PST Monday 23 November 2009.
This route crosses B.C. weather regions. Drive carefully and be prepared for delays during severe winter conditions.

Hope
Region: Fraser Valley
Tonight..Periods of rain ending late this evening then cloudy. Low plus 5.
Tuesday..Cloudy. 60 percent chance of showers late in the day. High 10.
Tuesday night..Periods of rain. Temperature steady near 8.

Hwy 3:Hope to Princeton
Region: Highway 3 - Hope to Princeton via Allison Pass
Tonight..Cloudy with 60 percent chance of flurries overnight. Snow level near 1100 metres.
Tuesday..A mix of sun and cloud. Becoming cloudy in the afternoon.

Princeton
Region: Similkameen
Tonight..Cloudy periods. Becoming cloudy this evening. 40 percent chance of flurries or rain showers overnight. Low plus 1.
Tuesday..Cloudy with sunny periods. High plus 3.
Tuesday night..Overcast. Low zero.

Osoyoos
Region: South Okanagan - including Penticton
Tonight..Cloudy. 60 percent chance of showers late this evening and overnight. Snow level 700 metres. Wind south 30 km/h. Low plus 3.
Tuesday..Cloudy with sunny periods. Wind becoming south 20 km/h in the afternoon. High 6.
Tuesday night..Overcast. Wind south 20 km/h. Temperature steady near plus 3.

Hwy 3:Paulson to Kootenay
Region: Highway 3 - Paulson Summit to Kootenay Pass
Tonight..Periods of snow. Amount 5 cm. Snow level 800 metres.
Tuesday..Flurries ending in the morning then cloudy. Snow level 800 metres.

Castlegar
Region: West Kootenay
Tonight..Rain showers or flurries. Low plus 1.
Tuesday..A few flurries or rain showers ending in the morning then cloudy. High plus 4.
Tuesday night..Cloudy. 40 percent chance of showers before morning. Low plus 2.

Creston
Region: Kootenay Lake
Tonight..Cloudy. 60 percent chance of flurries late this evening and overnight. Low plus 1.
Tuesday..Cloudy with 60 percent chance of flurries in the morning then a mix of sun and cloud. High plus 5.
Tuesday night..Cloudy periods. Becoming cloudy in the evening. Temperature steady near plus 1.

Cranbrook
Region: East Kootenay - south including Cranbrook
Tonight..Cloudy. Fog patches overnight. Wind southeast 30 km/h becoming light this evening. Low minus 4.
Tuesday..Cloudy with sunny periods. High plus 2.
Tuesday night..Cloudy. Low minus 4.

Sparwood
Region: Elk Valley
Tonight..Cloudy. 30 percent chance of flurries early this evening and overnight. Wind south 20 km/h becoming light this evening. Low minus 4.
Tuesday..Cloudy with sunny periods. 30 percent chance of flurries in the morning. High plus 4.
Tuesday night..Cloudy periods. Becoming cloudy in the evening. Low minus 3.

Crowsnest
Region: Crowsnest Pass - Pincher Creek - Waterton Lakes Nat. Park
Tonight..A few clouds. Wind west 60 km/h gusting to 80 diminishing to 30 after midnight. Low zero.
Tuesday..Sunny with cloudy periods. Wind west 30 km/h. High plus 3.
Tuesday night..A few clouds. Wind west 20 km/h increasing to 40 gusting to 60 after midnight. Low minus 3 with temperature rising to plus 2 by morning.
Copyright 2009 Environment Canada (http://www.weatheroffice.gc.ca).