| Record high, °C | 38 | 37 | 40 | 41 | 40 | 40 | 38 | 40 | 33 | 31 | 37 | 35 | 41 | 
                                            
                    | Average high, °C | 25 | 28 | 30 | 31 | 32 | 32 | 31 | 27 | 24 | 22 | 22 | 23 | 27 | 
                                            
                    | Average temperature, °C | 21 | 24 | 26 | 28 | 28 | 28 | 26 | 23 | 20 | 18 | 18 | 20 | 23 | 
                                            
                    | Average low, °C | 15 | 18 | 20 | 21 | 22 | 22 | 21 | 18 | 16 | 13 | 13 | 14 | 18 | 
                                            
                    | Record low, °C | 3 | 6 | 8 | 12 | 10 | 12 | 8 | 7 | 2 | 1 | 0 | 0 | 0 | 
            
            
                                                        
                    | Fog, days | 9 | 6 | 4 | 3 | 2 | 4 | 6 | 5 | 7 | 9 | 9 | 10 | 74 | 
            
                                            
                    | Thunderstorms, days | 4 | 6 | 5 | 5 | 7 | 5 | 5 | 5 | 3 | 3 | 2 | 3 | 53 | 
                                                                    
                    | Average precipitation, mm. | 82 | 137 | 161 | 147 | 152 | 135 | 131 | 149 | 117 | 77 | 54 | 59 | 1401 | 
                                                                                
                        | Relative humidity, % | 65 | 65 | 64 | 63 | 65 | 68 | 70 | 73 | 75 | 76 | 71 | 67 | 69 | 
                                                                                    
                        | Relative humidity morning, % | 79 | 80 | 83 | 84 | 85 | 87 | 87 | 88 | 86 | 85 | 80 | 80 | 84 | 
                                                                                    
                        | Relative humidity evening, % | 56 | 55 | 56 | 55 | 56 | 57 | 58 | 64 | 68 | 68 | 61 | 59 | 59 | 
                                                                        
                    | Wind speed, km/h | 13 | 10 | 10 | 12 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 13 | 10 | 
                                                                    
                    | Day Length, часов | 12 | 13 | 14 | 14 | 14 | 13 | 13 | 13 | 11 | 11 | 11 | 12 | 13 | 
                                                        
                    | Dew point, °C | 15 | 17 | 19 | 20 | 21 | 22 | 20 | 18 | 16 | 14 | 13 | 13 | 207 | 
                                                        
                    | Growing degree-day, °C | 342 | 428 | 474 | 549 | 567 | 506 | 508 | 393 | 322 | 246 | 254 | 298 | 4887 | 
                                                                    
                    | Solar radiation, global, Mj/m2 | 17 | 20 | 23 | 24 | 24 | 21 | 19 | 16 | 13 | 11 | 12 | 15 | 18 |