| Record high, °C | 
                                            38 | 
                                            31 | 
                                            28 | 
                                            23 | 
                                            21 | 
                                            24 | 
                                            29 | 
                                            32 | 
                                            35 | 
                                            37 | 
                                            44 | 
                                            40 | 
                                        44 | 
                
                                            
                    | Average high, °C | 
                                            24 | 
                                            18 | 
                                            11 | 
                                            6 | 
                                            5 | 
                                            7 | 
                                            12 | 
                                            18 | 
                                            24 | 
                                            26 | 
                                            29 | 
                                            29 | 
                                        17 | 
                
                                            
                    | Average temperature, °C | 
                                            18 | 
                                            13 | 
                                            7 | 
                                            3 | 
                                            1 | 
                                            3 | 
                                            8 | 
                                            13 | 
                                            18 | 
                                            21 | 
                                            23 | 
                                            23 | 
                                        13 | 
                
                                            
                    | Average low, °C | 
                                            14 | 
                                            9 | 
                                            4 | 
                                            0 | 
                                            -1 | 
                                            -0 | 
                                            4 | 
                                            8 | 
                                            13 | 
                                            16 | 
                                            18 | 
                                            18 | 
                                        8 | 
                
                                            
                    | Record low, °C | 
                                            5 | 
                                            -5 | 
                                            -8 | 
                                            -13 | 
                                            -18 | 
                                            -15 | 
                                            -12 | 
                                            -3 | 
                                            3 | 
                                            7 | 
                                            9 | 
                                            7 | 
                                        -18 | 
                
            
                                            
                    | Rain, days | 
                                            10 | 
                                            12 | 
                                            13 | 
                                            12 | 
                                            9 | 
                                            9 | 
                                            12 | 
                                            16 | 
                                            16 | 
                                            16 | 
                                            11 | 
                                            10 | 
                                        146 | 
                
            
                                            
                    | Snow, days | 
                                            0 | 
                                            0 | 
                                            3 | 
                                            8 | 
                                            10 | 
                                            7 | 
                                            4 | 
                                            1 | 
                                            0 | 
                                            0 | 
                                            0 | 
                                            0 | 
                                        33 | 
                
                                                        
                    | Fog, days | 
                                            0 | 
                                            2 | 
                                            4 | 
                                            6 | 
                                            5 | 
                                            3 | 
                                            1 | 
                                            1 | 
                                            0 | 
                                            0 | 
                                            0 | 
                                            0 | 
                                        22 | 
                
            
                                            
                    | Thunderstorms, days | 
                                            2 | 
                                            2 | 
                                            0 | 
                                            0 | 
                                            0 | 
                                            0 | 
                                            1 | 
                                            3 | 
                                            7 | 
                                            10 | 
                                            7 | 
                                            7 | 
                                        39 | 
                
                                                                    
                    | Average precipitation, mm. | 
                                            55 | 
                                            50 | 
                                            55 | 
                                            57 | 
                                            47 | 
                                            40 | 
                                            49 | 
                                            56 | 
                                            58 | 
                                            101 | 
                                            63 | 
                                            58 | 
                                        691 | 
                
                                                                                
                        | Relative humidity, % | 
                                                    67 | 
                                                    71 | 
                                                    75 | 
                                                    79 | 
                                                    78 | 
                                                    71 | 
                                                    63 | 
                                                    61 | 
                                                    61 | 
                                                    63 | 
                                                    61 | 
                                                    61 | 
                                                68 | 
                    
                                                                                    
                        | Relative humidity morning, % | 
                                                    86 | 
                                                    87 | 
                                                    90 | 
                                                    89 | 
                                                    89 | 
                                                    87 | 
                                                    83 | 
                                                    80 | 
                                                    79 | 
                                                    81 | 
                                                    79 | 
                                                    81 | 
                                                84 | 
                    
                                                                                    
                        | Relative humidity evening, % | 
                                                    54 | 
                                                    63 | 
                                                    78 | 
                                                    84 | 
                                                    82 | 
                                                    73 | 
                                                    59 | 
                                                    56 | 
                                                    56 | 
                                                    56 | 
                                                    50 | 
                                                    50 | 
                                                63 | 
                    
                                                                        
                    | Wind speed, km/h | 
                                            12 | 
                                            17 | 
                                            19 | 
                                            16 | 
                                            12 | 
                                            19 | 
                                            20 | 
                                            14 | 
                                            12 | 
                                            12 | 
                                            12 | 
                                            9 | 
                                        15 | 
                
                                                        
                    | Monthly sunshine, часов | 
                                            204 | 
                                            163 | 
                                            97 | 
                                            65 | 
                                            72 | 
                                            102 | 
                                            153 | 
                                            188 | 
                                            242 | 
                                            261 | 
                                            291 | 
                                            274 | 
                                        2112 | 
                
                                                        
                    | Day Length, часов | 
                                            13 | 
                                            11 | 
                                            10 | 
                                            9 | 
                                            10 | 
                                            11 | 
                                            13 | 
                                            14 | 
                                            15 | 
                                            16 | 
                                            16 | 
                                            15 | 
                                        13 | 
                
                                                        
                    | Dew point, °C | 
                                            11 | 
                                            7 | 
                                            2 | 
                                            0 | 
                                            -2 | 
                                            -1 | 
                                            1 | 
                                            5 | 
                                            10 | 
                                            13 | 
                                            15 | 
                                            14 | 
                                        75 | 
                
                                                        
                    | Growing degree-day, °C | 
                                            261 | 
                                            115 | 
                                            0 | 
                                            0 | 
                                            0 | 
                                            0 | 
                                            0 | 
                                            94 | 
                                            256 | 
                                            330 | 
                                            405 | 
                                            408 | 
                                        1868 | 
                
                                                                    
                    | Solar radiation, global, Mj/m2 | 
                                            14 | 
                                            9 | 
                                            5 | 
                                            4 | 
                                            5 | 
                                            8 | 
                                            12 | 
                                            16 | 
                                            20 | 
                                            21 | 
                                            21 | 
                                            19 | 
                                        13 |