Cologne shows a moderate seasonal swing: sample heat runs higher around Aug–Sep, Nov, softer around Jul, Oct, Dec (monthly sample means about 1.1–1.6). Trade-fair weeks, Oktoberfest/Christmas markets often beat the seasonal average. Index ≈ each hotel’s off-peak baseline—not a live city-wide rate.
January
1 public holidays2
3
4
5
6
7
8
9
10
11
121.4
131.3
14
15
16
17
181.3
191.6
201.7
211.6
221.8
231.8
241.4
251.5
261.5
271.5
281.5
292.2
302.8
312.5
February
No public holidays this month · 1 Festival12.8
22.3
31.6
42.0
52.0
10
111.4
121.5
131.6
14
15
16
17
18
191.6
201.4
211.4
222.6
232.9
242.4
252.1
261.3
271.3
28
March
2 public holidays1
21.3
31.6
41.4
51.5
61.4
7
81.4
91.6
101.3
111.3
12
131.3
141.3
153.9
165.6
175.2
184.8
194.1
201.7
21
22
23
24
25
27
28
30
31
April
No public holidays this month1
21.3
31.3
4
5
61.5
73.1
83.6
93.4
103.4
111.6
12
131.3
141.3
15
161.3
171.3
18
191.3
201.6
211.9
221.4
231.3
241.4
25
26
27
281.5
29
301.4
May
3 public holidays2
3
41.3
5
71.4
81.4
9
103.2
113.5
122.8
133.6
141.9
151.5
16
18
19
20
211.3
221.4
23
24
25
261.3
27
281.3
291.4
30
311.7
June
No public holidays this month11.9
22.0
31.4
41.3
51.5
6
71.3
81.4
91.4
101.4
111.6
121.8
131.5
141.7
152.3
162.1
171.7
181.6
191.7
20
211.6
222.0
231.7
241.4
251.5
261.5
27
281.3
291.3
301.4
July
No public holidays this month12.0
22.2
31.5
41.9
51.3
61.5
71.6
81.3
92.2
101.6
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
August
No public holidays this month1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
September
No public holidays this month1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
October
1 public holidaysNovember
No public holidays this month1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
December
2 public holidaysIndex ≈ 1.0 is each hotel’s sample off-peak baseline; shown when >1.2. Sampled reference, not live city-wide rates