Deal's winters are typically cool, with temperatures often below freezing in January and February. As spring arrives in March and April, temperatures gradually warm up, but still experience occasional chilly days. Summer months of June, July, and August bring mild warmth, with average highs around 25-26°C, while September marks a slight drop in temperature before autumn settles in. October can be quite cool again, with November returning to winter-like conditions. December's temperatures are similar to January's, indicating a consistent chill throughout the year.