{{Weather box
|location = Cowan
|metric first = yes
|single line= yes
|collapsed = yes
|Jan record high C = 13.0
|Feb record high C = 15.0
|Mar record high C = 24.5
|Apr record high C = 30.0
|May record high C = 35.0
|Jun record high C = 37.0
|Jul record high C = 38.0
|Aug record high C = 38.0
|Sep record high C = 32.0
|Oct record high C = 29.0
|Nov record high C = 20.0
|Dec record high C = 14.5
|year record high C = 38.0
|Jan high C = -10.3
|Feb high C = -6.9
|Mar high C = 0.4
|Apr high C = 9.9
|May high C = 17.4
|Jun high C = 22.4
|Jul high C = 25.4
|Aug high C = 24.0
|Sep high C = 17.6
|Oct high C = 9.3
|Nov high C = -1.8
|Dec high C = -8.2
|year high C = 8.3
|Jan mean C = -16.5
|Feb mean C = -13.6
|Mar mean C = -6.6
|Apr mean C = 2.5
|May mean C = 9.6
|Jun mean C = 14.9
|Jul mean C = 17.8
|Aug mean C = 16.3
|Sep mean C = 10.6
|Oct mean C = 3.4
|Nov mean C = -6.8
|Dec mean C = -13.9
|year mean C = 1.5
|Jan low C = -22.7
|Feb low C = -20.2
|Mar low C = -13.5
|Apr low C = -4.9
|May low C = 1.7
|Jun low C = 7.5
|Jul low C = 10.1
|Aug low C = 8.6
|Sep low C = 3.6
|Oct low C = -2.6
|Nov low C = -11.9
|Dec low C = -19.5
|year low C = -5.3
|Jan record low C = -45.0
|Feb record low C = -44.0
|Mar record low C = -45.0
|Apr record low C = -27.0
|May record low C = -16.0
|Jun record low C = -5.0
|Jul record low C = -2.5
|Aug record low C = -3.0
|Sep record low C = -12.0
|Oct record low C = -23.0
|Nov record low C = -38.0
|Dec record low C = -42.0
|year record low C = -45.0
|Jan precipitation mm = 30.6
|Feb precipitation mm = 24.8
|Mar precipitation mm = 33.6
|Apr precipitation mm = 34.5
|May precipitation mm = 61.0
|Jun precipitation mm = 99.0
|Jul precipitation mm = 87.6
|Aug precipitation mm = 75.8
|Sep precipitation mm = 67.5
|Oct precipitation mm = 42.7
|Nov precipitation mm = 28.6
|Dec precipitation mm = 32.1
|year precipitation mm = 617.8
|Jan rain mm= 0.5
|Feb rain mm= 1.3
|Mar rain mm= 4.6
|Apr rain mm= 12.4
|May rain mm= 56.6
|Jun rain mm= 98.9
|Jul rain mm= 87.6
|Aug rain mm= 75.8
|Sep rain mm= 66.4
|Oct rain mm= 27.6
|Nov rain mm= 2.9
|Dec rain mm= 0.5
|year rain mm= 435.4
|Jan snow cm= 30.0
|Feb snow cm= 23.5
|Mar snow cm= 29.0
|Apr snow cm= 22.1
|May snow cm= 4.4
|Jun snow cm= 0.1
|Jul snow cm= 0.0
|Aug snow cm= 0.0
|Sep snow cm= 1.0
|Oct snow cm= 15.1
|Nov snow cm= 25.7
|Dec snow cm= 31.6
|year snow cm= 182.5
|source 1 = Environment Canada^[2]
|date=August 2010

}}