Winter in Pioltello is marked by cold temperatures, with January averaging just 1°C and dropping as low as -9°C. February's average temperature is slightly warmer at 6°C, but still sees occasional lows of -12°C. Spring brings a gradual warming trend, with March and April averages rising to around 7-9°C, and May seeing daytime highs reach up to 25°C. Summer is mild, with June and July averaging around 21°C, while August lingers at 20°C. Autumn sees temperatures drop again, with September's average of 18°C giving way to October's cooler averages, before November and December return to winter-like conditions.