Heidelberg offers a solid outdoor season. May through September are perfect for all activities. Dinner outside works 5/12 months, while walking is comfortable 12/12 months — impressive.
HeidelbergGermany
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Annual
5/12
Dinner Outside
40
0Jan: 0% viability
0
1Feb: 1% viability
1
9Mar: 9% viability
9
41Apr: 41% viability
41
69May: 69% viability
69
81Jun: 81% viability
81
87Jul: 87% viability
87
84Aug: 84% viability
84
75Sep: 75% viability
75
30Oct: 30% viability
30
1Nov: 1% viability
1
0Dec: 0% viability
0
5/12
Dinner Outside
0Jan: 0% viability
0
1Feb: 1% viability
1
9Mar: 9% viability
9
41Apr: 41% viability
41
69May: 69% viability
69
81Jun: 81% viability
81
87Jul: 87% viability
87
84Aug: 84% viability
84
75Sep: 75% viability
75
30Oct: 30% viability
30
1Nov: 1% viability
1
0Dec: 0% viability
0
40%
Cold
7/12
Lunch Outside
59
18Jan: 18% viability
18
35Feb: 35% viability
35
58Mar: 58% viability
58
71Apr: 71% viability
71
74May: 74% viability
74
76Jun: 76% viability
76
78Jul: 78% viability
78
73Aug: 73% viability
73
82Sep: 82% viability
82
75Oct: 75% viability
75
50Nov: 50% viability
50
15Dec: 15% viability
15
7/12
Lunch Outside
18Jan: 18% viability
18
35Feb: 35% viability
35
58Mar: 58% viability
58
71Apr: 71% viability
71
74May: 74% viability
74
76Jun: 76% viability
76
78Jul: 78% viability
78
73Aug: 73% viability
73
82Sep: 82% viability
82
75Oct: 75% viability
75
50Nov: 50% viability
50
15Dec: 15% viability
15
59%
Cold
12/12
Walking
94
96Jan: 96% viability
96
95Feb: 95% viability
95
98Mar: 98% viability
98
99Apr: 99% viability
99
99May: 99% viability
99
89Jun: 89% viability
89
88Jul: 88% viability
88
77Aug: 77% viability
77
93Sep: 93% viability
93
99Oct: 99% viability
99
99Nov: 99% viability
99
98Dec: 98% viability
98
12/12
Walking
96Jan: 96% viability
96
95Feb: 95% viability
95
98Mar: 98% viability
98
99Apr: 99% viability
99
99May: 99% viability
99
89Jun: 89% viability
89
88Jul: 88% viability
88
77Aug: 77% viability
77
93Sep: 93% viability
93
99Oct: 99% viability
99
99Nov: 99% viability
99
98Dec: 98% viability
98
94%
12/12
Running
94
96Jan: 96% viability
96
95Feb: 95% viability
95
98Mar: 98% viability
98
99Apr: 99% viability
99
99May: 99% viability
99
88Jun: 88% viability
88
87Jul: 87% viability
87
75Aug: 75% viability
75
93Sep: 93% viability
93
99Oct: 99% viability
99
99Nov: 99% viability
99
98Dec: 98% viability
98
12/12
Running
96Jan: 96% viability
96
95Feb: 95% viability
95
98Mar: 98% viability
98
99Apr: 99% viability
99
99May: 99% viability
99
88Jun: 88% viability
88
87Jul: 87% viability
87
75Aug: 75% viability
75
93Sep: 93% viability
93
99Oct: 99% viability
99
99Nov: 99% viability
99
98Dec: 98% viability
98
94%
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ComfortableModerateUncomfortable
Based on 2014–2024 hourly climate data · Updated Mar 2025