Data source: Meteostat・Last updated: 2025-09
Spring (March–May): Average 8.3–16.3°C, mild climate, increasing sunshine, occasional showers. Common activities: Stroll through the Old Town, visit Heidelberg Castle, cycle along the Neckar River. Recommended clothing: Light jacket, long-sleeved shirt, comfortable shoes.
Summer (June–August): Average 20.4–22.1°C, warm and dry, plenty of sunshine, occasional afternoon thunderstorms. Common activities: Swimming in the Neckar River, visiting Heidelberg University, enjoying outdoor cafes. Recommended clothing: Short-sleeved shirts, shorts, sandals, and a light jacket in case of sudden rain.
Autumn (September–November): Average 17.3–7.6°C, cool climate, colorful foliage, more rainfall. Common activities: Enjoying the autumn scenery, visiting museums, tasting traditional German food and wine. Recommended clothing: Light sweater, jacket, long trousers, and rain gear.
Winter (December–February): Average 4.5–6.7°C, cold and humid, occasional snowfall. Common activities: Visiting indoor attractions such as the Heidelberg Castle Museum, enjoying hot chocolate and Christmas markets. Recommended clothing: Thick coat, sweater, scarf, gloves, and hat.
Annual average temperature: approx. 12.7°C / Annual rainfall: approx. 678 mm / Summer humidity: 60%–70% / Rainiest month: October
| Month | January | February | March | April | May | June | July | August | September | October | November | December |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temperature | 3.8°C | 6.7°C | 8.3°C | 10.4°C | 16.3°C | 20.4°C | 21.5°C | 22.1°C | 17.3°C | 13.4°C | 7.6°C | 4.5°C |
| Rainfall (mm) | 44.5 | 33.8 | 39.8 | 60 | 64.7 | 56.9 | 57.3 | 59.5 | 77.7 | 82.7 | 70.9 | 30.8 |
| Date | 11/6Friday | 11/7Saturday | 11/8Sunday | 11/9Monday | 11/10Tuesday | 11/11Wednesday | 11/12Thursday |
|---|---|---|---|---|---|---|---|
| Weather | Sunny | Cloudy | Sunny | Sunny | Overcast | Light drizzle | Patchy rain nearby |
| High | 10.7°C | 8.8°C | 11.6°C | 11.3°C | 10.8°C | 12.6°C | 15.2°C |
| Low | 0.8°C | 1.9°C | 2.5°C | 1.5°C | 4.9°C | 7.4°C | 10.7°C |