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.

Lytton
Region: Fraser Canyon
Tonight..Cloudy periods. 60 percent chance of showers. Snow level 1000 metres. Wind south 40 km/h gusting to 60 becoming light near midnight. Low plus 2.
Tuesday..A mix of sun and cloud. Becoming cloudy in the afternoon. High 6.
Tuesday night..Overcast. Low plus 4.

Kamloops
Region: South Thompson
Tonight..Cloudy periods. Wind east 30 km/h gusting to 50 becoming light this evening. Low plus 2.
Tuesday..A mix of sun and cloud. Becoming cloudy in the afternoon. Wind becoming east 20 km/h in the afternoon. High plus 5.
Tuesday night..Overcast. Wind east 30 km/h. Temperature steady near plus 4.
Copyright 2009 Environment Canada (http://www.weatheroffice.gc.ca).