Vietnam · 21.03°N 105.85°E · monthly climate normals, judged against the Tropical preset (mean 24–33 °C75–91 °F, anything but the monsoon)
The best time to visit Hanoi is October, when mean temperatures sit around 25 °C77 °F and rainfall averages 120 mm4.7 in a month.
The rainy season runs May to October, and May to September is a true monsoon — 200–312 mm7.9–12 in a month, peaking in August at 312 mm12 in. June is the hottest month at 29 °C84 °F and January the coldest at 17 °C63 °F.
Figures are 30-year monthly averages (WorldClim 2.1 monthly normals 1970–2000) for the 0.25° grid cell at 21.03, 105.85 — a climate guide, not a forecast.
Pick the weather you like and every month is judged against it — temperature above the month names, rain below.
Good time to go for a Tropical holiday: October.
Open Hanoi on the interactive map ↗ the same verdict for every place on Earth, any month
Reading the chart. Gold is good: the month fits what you picked. Any other colour names the reason it doesn't — the temperature bar can be too cold or too hot, the rain bar too dry, too rainy or monsoon. A faded gold bar is a half that fits while the other half fails; a gold month name means both fit.
What the verdicts mean. Temperature is the monthly mean, judged against the preset's band (mean 24–33 °C75–91 °F for Tropical). Rain is judged by each month's class within Hanoi's own year rather than raw millimetres: dry under 60 mm2.4 in, showers 60–100 mm2.4–3.9 in, rainy from 100 mm3.9 in and 35 % of the wettest month. Too rainy is a rainy-season month the preset doesn't allow. Monsoon is the heaviest kind of rainy season — 180 mm7.1 in or more (120 mm4.7 in near the yearly peak) in a climate whose wettest month is at least three times its driest — so every monsoon month is rainy season too; the label says which kind. Full rules on the method page.
| Month | Rain | Mean | Season | Tropical verdict |
|---|---|---|---|---|
| January | 160.6 | 1762 | dry | too cold |
| February | 321.3 | 1864 | dry | too cold |
| March | 401.6 | 2068 | dry | too cold |
| April | 883.5 | 2474 | showers | too cold |
| May | 2007.9 | 2781 | monsoon | monsoon |
| June | 2489.8 | 2984 | monsoon | monsoon |
| July | 29612 | 2984 | monsoon | monsoon |
| August | 31212 | 2983 | monsoon | monsoon |
| September | 2329.1 | 2882 | monsoon | monsoon |
| October | 1204.7 | 2577 | rainy | good |
| November | 481.9 | 2271 | dry | too cold |
| December | 160.6 | 1864 | dry | too cold |
| Looking for | Rule | Months that fit |
|---|---|---|
| Warm | mean 14–24 °C57–75 °F, dry or showers | November to April |
| Tropical | mean 24–33 °C75–91 °F, anything but the monsoon | October |
| Beach | mean 24–33 °C75–91 °F, dry or showers | |
| Cool | mean 0–14 °C32–57 °F, anything but the monsoon | |
| Snow | mean below 0 °C32 °F, any rain |
Yes. The rainy season runs May to October, and May to September is a true monsoon — 200–312 mm7.9–12 in a month, peaking in August at 312 mm12 in. Outside it, November to March is dry.
June is the hottest month at 29 °C84 °F and January the coldest at 17 °C63 °F. Annual rainfall totals about 1,648 mm65 in.
The nearest destinations that do fit the Tropical preset in the months Hanoi doesn't:
The interactive map colours the whole world by how it fits your picks in any month, and shows this chart for any place you tap.