Jelenia Gora experiences a continental climate with cold winters and mild summers. Winters are particularly harsh, with temperatures often dropping below -15°C in January and February, but warming up slightly by March, still averaging around -5°C. Spring arrives slowly, with April and May temperatures gradually rising to average highs of 8°C and 15°C respectively, bringing a gentle warmth to the region. Summers are mild, with June and July temperatures averaging around 11°C, although occasional heatwaves can bring temperatures up to 22°C. Autumn is cool and unpredictable, with October and November temperatures fluctuating between freezing and mild, before dropping again in December.