Winters in Jette, Belgium are quite chilly, with January and December averaging around 2-5°C, while February is slightly warmer at an average of 6°C. Spring brings mild temperatures, with March and April averaging around 7°C, while May can be quite warm, reaching up to 26°C on occasion. Summer months are generally pleasant, with June and July averaging a comfortable 18-17°C, although August can still get quite hot. Autumn is similar to spring, with October and November experiencing mild temperatures, before the cold winter sets in again. Overall, temperature fluctuations throughout the year are moderate, but it's not uncommon for Jette to experience occasional warm or cool spells during each season.