| Record high, °C | 28 | 22 | 18 | 15 | 15 | 16 | 18 | 25 | 28 | 30 | 35 | 34 | 35 | 
                                            
                    | Average high, °C | 18 | 14 | 10 | 7 | 8 | 8 | 10 | 13 | 16 | 18 | 20 | 20 | 14 | 
                                            
                    | Average temperature, °C | 15 | 11 | 8 | 4 | 6 | 6 | 7 | 10 | 12 | 15 | 17 | 17 | 10 | 
                                            
                    | Average low, °C | 11 | 8 | 5 | 3 | 3 | 3 | 4 | 6 | 8 | 11 | 13 | 13 | 7 | 
                                            
                    | Record low, °C | 0 | -3 | -5 | -10 | -6 | -7 | -5 | -2 | 1 | 1 | 6 | 6 | -10 | 
            
                                            
                    | Rain, days | 24 | 24 | 23 | 25 | 23 | 20 | 24 | 23 | 22 | 22 | 23 | 23 | 276 | 
            
                                            
                    | Snow, days | 0 | 0 | 1 | 3 | 2 | 3 | 2 | 1 | 0 | 0 | 0 | 0 | 12 | 
                                                        
                    | Fog, days | 2 | 2 | 3 | 4 | 3 | 2 | 1 | 1 | 1 | 0 | 1 | 1 | 21 | 
            
                                            
                    | Thunderstorms, days | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 3 | 3 | 2 | 2 | 18 | 
                                                        
                    | Snowfall, cm. | 0 | 0 | 0 | 5 | 9 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 27 | 
                                                        
                    | Average precipitation, mm. | 43 | 73 | 63 | 70 | 64 | 53 | 64 | 48 | 37 | 61 | 46 | 50 | 672 | 
                                                                                
                        | Relative humidity, % | 76 | 78 | 81 | 83 | 82 | 79 | 75 | 72 | 70 | 72 | 71 | 74 | 76 | 
                                                                                    
                        | Relative humidity morning, % | 89 | 89 | 87 | 88 | 87 | 88 | 87 | 87 | 85 | 86 | 87 | 90 | 88 | 
                                                                                    
                        | Relative humidity evening, % | 69 | 74 | 79 | 83 | 81 | 77 | 71 | 64 | 61 | 65 | 65 | 66 | 71 | 
                                                                        
                    | Wind speed, km/h | 15 | 17 | 17 | 17 | 19 | 19 | 19 | 17 | 16 | 16 | 15 | 15 | 17 | 
                                                                    
                    | Day Length, часов | 13 | 11 | 9 | 8 | 9 | 11 | 13 | 15 | 17 | 18 | 17 | 15 | 13 | 
                                                        
                    | Dew point, °C | 10 | 7 | 4 | 3 | 2 | 1 | 2 | 3 | 6 | 9 | 11 | 11 | 69 | 
                                                        
                    | Growing degree-day, °C | 135 | 31 | 0 | 0 | 0 | 0 | 0 | 0 | 62 | 135 | 202 | 202 | 766 | 
                                                                    
                    | Solar radiation, global, Mj/m2 | 10 | 6 | 3 | 2 | 2 | 5 | 8 | 13 | 18 | 18 | 18 | 14 | 10 |