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
21.3
3
4
5
61.4
7
81.3
9
101.3
111.3
12
131.4
14
15
16
17
18
191.3
201.6
21
22
231.3
24
251.3
262.0
272.3
28
March
3 public holidays11.3
21.3
3
4
5
61.5
7
8
91.3
101.3
11
12
131.3
14
151.4
161.6
17
181.4
191.3
201.4
21
22
231.4
241.4
25
271.7
301.3
31
April
1 public holidays11.4
21.6
31.8
4
51.5
61.6
71.6
81.5
91.6
102.3
111.8
121.7
132.2
141.8
151.8
161.7
171.7
181.3
191.4
201.7
211.7
221.5
231.5
241.7
25
261.3
281.4
291.4
301.5
May
4 public holidays11.6
2
31.4
41.5
71.5
81.6
91.4
102.8
114.2
12
133.4
141.6
151.6
182.1
19
201.8
211.5
221.8
231.4
241.4
251.9
261.9
271.7
281.6
291.8
301.3
312.1
June
No public holidays this month12.0
22.4
32.2
42.7
51.8
62.2
71.5
81.9
91.9
101.7
112.3
122.0
132.1
141.8
151.8
162.1
171.6
182.1
191.7
201.9
211.6
221.8
231.9
241.8
252.1
261.7
271.9
281.5
291.7
301.8
July
No public holidays this month11.5
22.0
31.6
41.9
51.5
61.6
7
81.8
92.5
101.8
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
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
November
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