Hanoi shows a fairly mild monthly swing: sample heat runs higher around Oct–Dec, softer around Jul–Sep (monthly sample means about 1.1–1.3). Tết and coastal holiday road-trippers lift heat. Index ≈ each hotel’s off-peak baseline—not a live city-wide rate.
January 2027
1 public holidays41.4
51.3
61.5
72.0
81.8
92.1
102.3
112.2
121.9
131.6
141.5
15
16
17
181.4
191.3
201.4
211.3
22
23
24
251.4
261.3
27
28
29
30
31
February 2027
1 public holidaysMarch 2027
No public holidays this month11.4
21.4
31.4
4
51.3
61.4
7
81.5
91.4
101.4
11
121.3
13
14
151.5
161.5
17
181.5
191.3
201.3
21
221.5
231.4
241.4
251.4
261.3
271.3
28
291.5
301.4
311.5
April 2027
2 public holidays11.4
21.3
3
4
51.4
61.4
7
81.3
91.3
10
11
121.4
131.3
14
151.3
17
18
191.4
201.4
211.4
221.4
231.3
24
25
261.4
271.4
28
29
May 2027
1 public holidays · 2 Festival41.3
5
61.3
7
81.3
9
101.4
11
121.4
131.3
15
16
171.4
181.3
201.3
211.3
221.3
23
241.5
251.3
26
271.3
28
29
30
311.5
June 2027
No public holidays this month1
21.3
31.3
4
51.3
6
71.4
8
91.3
101.3
11
12
13
141.4
15
16
171.3
18
19
20
211.4
22
23
241.3
25
26
27
281.5
291.4
30
July 2027
No public holidays this month11.4
2
3
4
51.5
61.4
7
81.4
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
August 2027
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 2027
1 public holidays · 1 FestivalOctober 2027
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 2027
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 2027
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
Index ≈ 1.0 is each hotel’s sample off-peak baseline; shown when >1.2. Sampled reference, not live city-wide rates