Christina Lake enjoys warm dry summers and relatively mild winters. In the summer the temperature ranges from 18 to 33° Celsius (64 to 90°F), with mid summer temperatures often reaching well into the 30's. The average winter temperature range is from -8 to -2° Celsius (17 to 28°F).

The average yearly rainfall is 42cm (16.5 inches). Southern valleys enjoy an average of over 2000 hours of sunshine annually. Yearly snowfall averages 44cm (17.3 inches). The water temperature of Christina Lake averages 22 degrees Celsius (71F) in the summer making it the warmest tree-lined lake in BC.