June 2025 brought a warm and notably wet month to Noord-Holland, with temperatures running slightly above normal and precipitation significantly exceeding seasonal averages. The province experienced considerable weather variability throughout the period, ranging from cool early-month conditions to a notable warm spell mid-month.
Temperature Overview
The average temperature for June in Noord-Holland reached 17.5 degrees Celsius, which is 0.5 degrees above the normal value of 17.0 degrees. This modest warming reflects a generally mild month, though the temperature range was quite pronounced. The warmest day occurred on June 13 in Wijdemeren, where the mercury climbed to 30.6 degrees Celsius, marking a significant heat peak. In contrast, the coldest reading was recorded on June 11 in Oostzaan, dropping to just 8.6 degrees Celsius. This 22-degree difference between the month's extremes illustrates the dynamic nature of the weather pattern during this period.
Precipitation Patterns
Rainfall was notably abundant across Noord-Holland in June, with an average total of 68.2 millimeters compared to the normal value of 56.2 millimeters. This represents a 21 percent increase above seasonal expectations, indicating a wetter than average month. The most intense rainfall event occurred on June 8 in Castricum, where 39.2 millimeters fell in a single day. Castricum also recorded the highest monthly total across the province, accumulating 103.8 millimeters of precipitation, making it the wettest location during this period.
Sunshine and Notable Features
Despite the wet conditions, sunshine hours were favorable. The province recorded 405.4 hours of sunshine, exceeding the normal value of 382.4 hours by approximately 6 percent. This above-average sunshine, combined with the elevated rainfall, created conditions typical of a productive early summer month. The combination of adequate moisture and sunlight supported vegetation growth across the region, while the temperature anomaly of 0.5 degrees above normal contributed to a generally pleasant early summer experience for residents of Noord-Holland.