| Record high, °C | 32 | 33 | 27 | 19 | 17 | 18 | 25 | 27 | 31 | 37 | 37 | 37 | 37 | 
                                            
                    | Average high, °C | 24 | 19 | 14 | 10 | 8 | 8 | 10 | 15 | 20 | 25 | 28 | 27 | 17 | 
                                            
                    | Average temperature, °C | 19 | 15 | 12 | 8 | 5 | 5 | 7 | 11 | 16 | 20 | 23 | 23 | 14 | 
                                            
                    | Average low, °C | 15 | 12 | 8 | 5 | 2 | 3 | 4 | 8 | 12 | 16 | 18 | 18 | 10 | 
                                            
                    | Record low, °C | 5 | 2 | -2 | -3 | -8 | -8 | -6 | 0 | 3 | 8 | 10 | 8 | -8 | 
            
            
                                                        
                    | Fog, days | 16 | 19 | 21 | 21 | 23 | 20 | 24 | 21 | 18 | 15 | 15 | 15 | 228 | 
            
                                            
                    | Thunderstorms, days | 2 | 3 | 2 | 1 | 1 | 1 | 1 | 1 | 2 | 4 | 3 | 2 | 23 | 
                                                                    
                    | Average precipitation, mm. | 31 | 57 | 85 | 113 | 95 | 62 | 58 | 51 | 30 | 28 | 22 | 22 | 654 | 
                                                                                
                        | Relative humidity, % | 70 | 80 | 80 | 80 | 80 | 80 | 75 | 75 | 70 | 70 | 65 | 70 | 75 | 
                                                                                    
                        | Relative humidity morning, % | 82 | 83 | 81 | 81 | 82 | 81 | 83 | 81 | 84 | 83 | 83 | 84 | 82 | 
                                                                                    
                        | Relative humidity evening, % | 53 | 61 | 66 | 71 | 71 | 68 | 65 | 61 | 59 | 55 | 51 | 52 | 61 | 
                                                                        
                    | Wind speed, km/h | 19 | 16 | 17 | 17 | 16 | 19 | 17 | 17 | 17 | 17 | 19 | 20 | 18 | 
                                                                    
                    | Day Length, часов | 13 | 12 | 10 | 10 | 10 | 11 | 12 | 14 | 15 | 16 | 15 | 14 | 13 | 
                                                        
                    | Dew point, °C | 13 | 10 | 6 | 3 | 1 | 1 | 2 | 6 | 10 | 13 | 16 | 16 | 97 | 
                                                        
                    | Growing degree-day, °C | 283 | 164 | 25 | 0 | 0 | 0 | 0 | 42 | 181 | 308 | 396 | 379 | 1778 | 
                                                                    
                    | Solar radiation, global, Mj/m2 | 18 | 10 | 6 | 5 | 5 | 8 | 13 | 17 | 23 | 26 | 27 | 23 | 15 |