Mean monthly temperature in Helsinki at Kaisaniemi weather station (WMO 02973), Central Railway Station Square (WMO 02934) and Laajasalo.

Kaisaniemi represents Helsinki's larger and slightly low-lying parks, Railway Station Square represents urban areas well and Laajasalo represents sparsely build suburban areas well.

In case of strong inversions, only Kaisaniemi is slightly cold due to it's low-lying location.

Year 2012

Kaisaniemi park Central Railway Laajasalo suburb
january -3,4 -2,9 -3,9
february -6,8 -6,3 -7,3
march 0,8 1,4 -0,1
april 4,1 4,5 3,3
may 10,9 11,4 10,2
june 13,7 14,1 13,0
july 17,7 18,1 16,7
august 16,0 16,6 15,1
september 12,5 12,9 12,1
october 6,7 7,3 6,3
november 4,1 4,6 3,9
december -5,3 -4,9 -5,9