Sliven offers a solid outdoor season. 2 months of the year are perfect for all activities. Dinner outside works 4/12 months, while walking is comfortable 11/12 months — impressive.
SlivenBulgaria
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Annual
4/12
Dinner Outside
42
0Jan: 0% viability
0
1Feb: 1% viability
1
10Mar: 10% viability
10
42Apr: 42% viability
42
64May: 64% viability
64
71Jun: 71% viability
71
87Jul: 87% viability
87
87Aug: 87% viability
87
84Sep: 84% viability
84
51Oct: 51% viability
51
4Nov: 4% viability
4
0Dec: 0% viability
0
4/12
Dinner Outside
0Jan: 0% viability
0
1Feb: 1% viability
1
10Mar: 10% viability
10
42Apr: 42% viability
42
64May: 64% viability
64
71Jun: 71% viability
71
87Jul: 87% viability
87
87Aug: 87% viability
87
84Sep: 84% viability
84
51Oct: 51% viability
51
4Nov: 4% viability
4
0Dec: 0% viability
0
42%
Cold
8/12
Lunch Outside
68
42Jan: 42% viability
42
62Feb: 62% viability
62
62Mar: 62% viability
62
71Apr: 71% viability
71
67May: 67% viability
67
67Jun: 67% viability
67
68Jul: 68% viability
68
74Aug: 74% viability
74
87Sep: 87% viability
87
90Oct: 90% viability
90
70Nov: 70% viability
70
51Dec: 51% viability
51
8/12
Lunch Outside
42Jan: 42% viability
42
62Feb: 62% viability
62
62Mar: 62% viability
62
71Apr: 71% viability
71
67May: 67% viability
67
67Jun: 67% viability
67
68Jul: 68% viability
68
74Aug: 74% viability
74
87Sep: 87% viability
87
90Oct: 90% viability
90
70Nov: 70% viability
70
51Dec: 51% viability
51
68%
Cold
11/12
Walking
91
94Jan: 94% viability
94
95Feb: 95% viability
95
99Mar: 99% viability
99
99Apr: 99% viability
99
98May: 98% viability
98
86Jun: 86% viability
86
61Jul: 61% viability
61
66Aug: 66% viability
66
95Sep: 95% viability
95
99Oct: 99% viability
99
97Nov: 97% viability
97
99Dec: 99% viability
99
11/12
Walking
94Jan: 94% viability
94
95Feb: 95% viability
95
99Mar: 99% viability
99
99Apr: 99% viability
99
98May: 98% viability
98
86Jun: 86% viability
86
61Jul: 61% viability
61
66Aug: 66% viability
66
95Sep: 95% viability
95
99Oct: 99% viability
99
97Nov: 97% viability
97
99Dec: 99% viability
99
91%
Heat
10/12
Running
85
94Jan: 94% viability
94
95Feb: 95% viability
95
99Mar: 99% viability
99
99Apr: 99% viability
99
95May: 95% viability
95
72Jun: 72% viability
72
41Jul: 41% viability
41
46Aug: 46% viability
46
85Sep: 85% viability
85
98Oct: 98% viability
98
97Nov: 97% viability
97
99Dec: 99% viability
99
10/12
Running
94Jan: 94% viability
94
95Feb: 95% viability
95
99Mar: 99% viability
99
99Apr: 99% viability
99
95May: 95% viability
95
72Jun: 72% viability
72
41Jul: 41% viability
41
46Aug: 46% viability
46
85Sep: 85% viability
85
98Oct: 98% viability
98
97Nov: 97% viability
97
99Dec: 99% viability
99
85%
Heat
Tap any month for details · Click activity name for overview
ComfortableModerateUncomfortable
Based on 2014–2024 hourly climate data · Updated Mar 2025