| Record high, °C | 42 | 34 | 39 | 33 | 36 | 38 | 36 | 43 | 41 | 42 | 36 | 37 | 43 | 
                                            
                    | Average high, °C | 30 | 31 | 31 | 32 | 33 | 33 | 33 | 33 | 32 | 31 | 29 | 29 | 31 | 
                                            
                    | Average temperature, °C | 23 | 24 | 23 | 22 | 22 | 24 | 25 | 25 | 25 | 24 | 23 | 23 | 23 | 
                                            
                    | Average low, °C | 19 | 19 | 18 | 17 | 16 | 18 | 19 | 20 | 20 | 20 | 19 | 19 | 19 | 
                                            
                    | Record low, °C | 18 | 18 | 15 | 12 | 11 | 13 | 15 | 18 | 18 | 15 | 17 | 17 | 11 | 
            
                                            
                    | Rain, days | 12 | 12 | 6 | 3 | 1 | 3 | 3 | 5 | 8 | 10 | 16 | 17 | 96 | 
            
                                                        
                    | Fog, days | 4 | 4 | 7 | 14 | 12 | 8 | 5 | 3 | 2 | 2 | 5 | 4 | 70 | 
            
                                            
                    | Thunderstorms, days | 6 | 7 | 7 | 0 | 1 | 2 | 2 | 4 | 9 | 5 | 2 | 3 | 48 | 
                                                                    
                    | Average precipitation, mm. | 340 | 184 | 72 | 27 | 14 | 48 | 113 | 160 | 170 | 221 | 242 | 310 | 1901 | 
                                                                                
                        | Relative humidity, % | 82 | 80 | 79 | 72 | 65 | 67 | 73 | 77 | 80 | 82 | 84 | 84 | 77 | 
                                                                                    
                        | Relative humidity morning, % | 96 | 96 | 95 | 92 | 88 | 90 | 91 | 93 | 95 | 95 | 96 | 96 | 94 | 
                                                                                    
                        | Relative humidity evening, % | 72 | 70 | 60 | 47 | 36 | 43 | 49 | 61 | 67 | 71 | 78 | 77 | 61 | 
                                                                        
                    | Wind speed, km/h | 6 | 5 | 5 | 4 | 4 | 5 | 5 | 5 | 5 | 7 | 7 | 7 | 5 | 
                                                                    
                    | Day Length, часов | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 12 | 
                                                        
                    | Dew point, °C | 20 | 20 | 19 | 16 | 15 | 17 | 19 | 21 | 21 | 21 | 20 | 20 | 229 | 
                                                        
                    | Growing degree-day, °C | 402 | 419 | 390 | 357 | 366 | 381 | 456 | 447 | 450 | 414 | 403 | 406 | 4890 | 
                                                                    
                    | Solar radiation, global, Mj/m2 | 17 | 18 | 19 | 20 | 21 | 22 | 21 | 20 | 19 | 18 | 16 | 17 | 19 |