Washington DC shows a moderate seasonal swing: sample heat runs higher around Sep–Nov, softer around Jul–Aug, Dec (monthly sample means about 1.2–1.8). Long weekends, conventions and school breaks often beat a simple “season.” Index ≈ each hotel’s off-peak baseline—not a live city-wide rate.
January
2 public holidaysFebruary
1 public holidaysMarch
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
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
May
1 public holidaysJune
1 public holidaysJuly
1 public holidaysAugust
No public holidays this month1
2
3
41.3
51.3
6
7
8
9
10
111.4
12
13
14
15
16
17
18
19
201.4
211.7
222.3
231.3
24
25
26
27
28
29
30
31
September
1 public holidays1
2
3
4
51.3
6
81.5
91.6
101.3
111.4
121.5
131.4
142.9
152.7
162.8
171.7
181.4
191.5
201.3
211.8
222.5
232.5
241.6
251.4
261.5
271.6
282.8
292.4
302.0
October
1 public holidays11.6
21.4
31.6
41.4
52.0
62.1
72.1
81.6
91.5
101.6
111.8
132.8
142.8
151.8
161.5
171.5
181.5
191.9
202.4
212.2
221.9
231.6
241.7
251.4
261.8
272.0
281.8
291.5
30
311.3
November
2 public holidays11.3
21.6
31.8
41.8
51.5
6
71.3
8
91.6
101.5
121.5
131.4
141.6
151.5
162.0
171.8
181.8
191.4
20
21
22
23
24
25
27
28
29
301.3
December
1 public holidaysIndex ≈ 1.0 is each hotel’s sample off-peak baseline; shown when >1.2. Sampled reference, not live city-wide rates