January 2026 brought a notably cool and wet month to South Holland, with temperatures running slightly below normal and precipitation levels exceeding the seasonal average. The province experienced typical winter weather patterns, though with some significant fluctuations between cold spells and milder periods.
Temperature Overview
The average temperature for January in South Holland reached 3.0 degrees Celsius, which is 1.0 degree below the normal value of 4.0 degrees. This cooler-than-average month was marked by considerable temperature variation across the province. The coldest conditions were recorded in Dordrecht on January 11, where temperatures plummeted to -7.3 degrees Celsius. In stark contrast, Goeree-Overflakkee experienced the warmest day of the month on January 17, reaching 11.6 degrees Celsius, demonstrating the dynamic nature of winter weather in the region.
Precipitation Patterns
Rainfall during January totaled an average of 93.5 millimeters across South Holland, representing a 10 percent increase above the normal precipitation of 85.1 millimeters. The wettest conditions occurred in Westland on January 7, when 17.7 millimeters of rain fell in a single day. Over the entire month, Goeree-Overflakkee emerged as the wettest location in the province, accumulating 107.1 millimeters of precipitation, indicating that coastal areas received particularly substantial rainfall during this period.
Sunshine and Notable Features
Despite the wet conditions, sunshine hours were slightly above average, with 114.3 hours recorded compared to the normal 110.3 hours, representing a 4 percent increase. This suggests that while precipitation was frequent, the month still featured adequate periods of daylight and clear skies. The combination of below-normal temperatures, above-normal precipitation, and slightly elevated sunshine hours created typical winter conditions for South Holland, with the province experiencing the variable weather characteristic of the season.