Measured, not vibes
Best Time to Visit Hanoi
By measured weather comfort, the top months for Hanoi are December, February, November — and RouteVerdict's editorial pick, which also weighs crowds and prices, is January, February, March, April, October, November, December. The table below is computed from ERA5 reanalysis data for 2020–2024, measured at Hanoi (10 m elevation).
Month by month
Hanoi weather and comfort, 2020–2024
| Month | Avg high | Wet days | Comfort | Season |
|---|---|---|---|---|
| January | 21.2°C / 70°F | 9.7 | 79 | |
| February | 22.6°C / 73°F | 10 | 80 | Best |
| March | 26.2°C / 79°F | 11 | 73 | |
| April | 28.7°C / 84°F | 10.8 | 64 | |
| May | 31.8°C / 89°F | 13.8 | 45 | Shoulder |
| June | 33.6°C / 92°F | 14.7 | 35 | |
| July | 33.3°C / 92°F | 16.5 | 35 | |
| August | 32°C / 90°F | 20.5 | 39 | |
| September | 30.7°C / 87°F | 19.5 | 45 | Shoulder |
| October | 28.1°C / 83°F | 10.8 | 67 | |
| November | 26.8°C / 80°F | 6.3 | 80 | Best |
| December | 21.4°C / 71°F | 3.3 | 92 | Best |
Comfort is RouteVerdict's 0–100 score: 100·exp(−(high−23)²/162) × (1 − min(0.35, wet days × 0.02)). The full method is on the methodology page. Weather data by Open-Meteo.com (ERA5, CC BY 4.0), 2020–2024 normals. Wet day = ≥1 mm precipitation.
What the seasons are actually like
Traveling to Hanoi month by month
Hanoi's comfort score peaks in December at 91.9, with an average high of 21.4°C and just 3.3 wet days, ahead of February's 79.9 and November's 79.9 (a tie). Summer (June–August) is hot and increasingly wet, with June's 33.6°C the year's highest and wet-day counts climbing to 20.5 in August, pulling comfort down to 34.8–39.4. RouteVerdict's editorial pick spans January through April and October through December, avoiding the hot, humid summer stretch.
FAQ
Hanoi timing questions
What is the best month to visit Hanoi?
By measured weather comfort (ERA5 2020–2024), the top months are December, February, and November, with December scoring highest. RouteVerdict's editorial pick is January, February, March, April, October, November, and December, which also weighs crowds, prices, and events.
What is the hottest month in Hanoi?
June, with an average daily high of 33.6°C (92°F).
What is the rainiest month in Hanoi?
August, averaging 20.5 days with at least 1 mm of precipitation.
When is shoulder season in Hanoi?
September and May — the best-scoring months outside both the measured top three and RouteVerdict's editorial peak-season pick.
What is Hanoi's single best month for weather?
December, with an average high of 21.4°C, just 3.3 wet days, and a comfort score of 91.9 — the highest measured for any month.
How does Hanoi's summer compare to winter?
Summer (June-August) brings the year's hottest temperatures — June's 33.6°C — and rising rainfall, up to 20.5 wet days in August, pulling comfort down to 34.8–39.4, far below December's 91.9.