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 holidaysFebruary
No public holidays this month · 1 FestivalMarch
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
April
2 public holidaysMay
3 public holidaysJune
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
July
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
291.3
30
31
August
No public holidays this month11.5
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
221.3
23
242.1
254.7
264.5
276.3
283.8
293.2
30
31
September
No public holidays this month1
21.8
31.9
41.8
51.8
6
71.3
81.5
91.4
101.3
111.3
121.4
13
142.2
152.8
162.5
171.6
181.7
191.8
20
21
222.8
232.6
241.6
251.4
261.6
27
28
291.4
301.4
October
1 public holidays1
21.5
41.3
51.6
61.6
71.7
81.3
91.3
101.4
11
12
131.3
141.3
15
161.3
171.3
18
19
201.3
211.3
22
231.3
241.4
25
262.3
272.7
282.8
292.3
301.6
311.3
November
No public holidays this month1
2
31.3
4
5
61.4
71.6
81.5
91.6
102.2
112.0
12
131.3
141.3
15
161.7
172.4
181.8
191.5
201.5
211.6
22
231.3
241.4
252.1
261.3
272.0
281.8
29
301.3
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