Rotterdam shows a fairly mild monthly swing: sample heat runs higher around Sep–Nov, softer around Jul–Aug, Dec (monthly sample means about 1.1–1.5). Tulip season, King’s Day and autumn conferences are common peaks. Index ≈ each hotel’s off-peak baseline—not a live city-wide rate.
January
1 public holidaysFebruary
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
March
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
4 public holidaysMay
4 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
271.3
281.3
291.3
30
31
August
No public holidays this month11.5
2
3
4
5
6
7
81.4
9
10
11
12
13
141.3
151.5
16
17
18
19
20
211.4
221.6
23
241.3
25
26
27
281.4
291.7
30
31
September
No public holidays this month11.4
21.4
31.3
41.4
51.6
6
71.4
81.6
9
101.6
111.6
121.8
13
141.4
151.6
161.6
171.5
181.5
191.5
20
211.7
223.2
232.4
241.5
251.4
261.5
27
281.4
291.7
301.8
October
No public holidays this month11.7
21.6
32.0
41.8
52.5
61.7
71.4
81.5
91.4
101.4
11
121.3
131.5
141.5
151.5
161.4
171.4
18
191.4
201.5
211.9
221.6
231.6
241.6
25
261.3
271.5
281.5
291.3
301.3
311.4
November
No public holidays this month1
2
31.4
42.1
51.7
61.5
71.3
8
91.4
101.6
111.3
12
13
141.4
15
161.3
171.5
181.5
191.3
201.3
211.3
22
23
241.3
25
26
27
281.4
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