Vietnam · 21.03°N 105.85°E · 30-year monthly averages, judged against the Tropical preset (highs 28–38 °C82–100 °F, any rain except monsoon)
The best time to visit Hanoi is October, with highs of 29 °C84 °F and nights of 21 °C70 °F, and rainfall of about 120 mm4.7 in a month.
The rainy season is May to October; May to September is a true monsoon, with 200–312 mm7.9–12 in a month and a peak in August (312 mm12 in). June is the hottest month (highs of 33 °C91 °F) and January the coldest (20 °C68 °F).
The figures are 30-year monthly averages (WorldClim 2.1 monthly normals 1970–2000) for the 0.25° grid cell at 21.03, 105.85. This is a climate guide, not a forecast.
Pick the weather you like. Every month is then 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 verdicts for any place on Earth, in any month
Reading the chart. Gold means good: the month fits what you picked. Any other colour shows the reason it does not. The temperature bar can be too cold or too hot; the rain bar can be too dry, too rainy or monsoon. A faded gold bar means that half fits but the other half does not. A gold month name means both halves fit.
What the verdicts mean. Temperature is the month's average daily high (the afternoon), judged against the preset's band (highs 28–38 °C82–100 °F for Tropical). Rain is judged by each month's class within Hanoi's own year, not by raw millimetres: dry under 60 mm2.4 in, showers 60–100 mm2.4–3.9 in, rainy from 100 mm3.9 in and at least 35 % of the wettest month. Too rainy is a rainy-season month that the preset does not 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 where the wettest month has at least three times the rain of the driest. Every monsoon month is also a rainy-season month; the label says which kind. Full rules on the method page.
| Month | Rain | High | Low | Season | Tropical verdict |
|---|---|---|---|---|---|
| January | 160.6 | 2067 | 1355 | dry | too cold |
| February | 321.3 | 2068 | 1559 | dry | too cold |
| March | 401.6 | 2373 | 1864 | dry | too cold |
| April | 883.5 | 2780 | 2170 | showers | too cold |
| May | 2007.9 | 3187 | 2475 | monsoon | monsoon |
| June | 2489.8 | 3391 | 2678 | monsoon | monsoon |
| July | 29612 | 3391 | 2678 | monsoon | monsoon |
| August | 31212 | 3290 | 2577 | monsoon | monsoon |
| September | 2329.1 | 3188 | 2475 | monsoon | monsoon |
| October | 1204.7 | 2983 | 2170 | rainy | good |
| November | 481.9 | 2678 | 1864 | dry | too cold |
| December | 160.6 | 2272 | 1558 | dry | too cold |
| Looking for | Rule | Months that fit |
|---|---|---|
| Warm | highs 19–28 °C66–82 °F, dry or showers | November to April |
| Tropical | highs 28–38 °C82–100 °F, any rain except monsoon | October |
| Beach | highs 28–38 °C82–100 °F, dry or showers | |
| Cool | highs 3–19 °C37–66 °F, any rain except monsoon | |
| Snow | highs below 3 °C37 °F, any rain |
Yes. The rainy season is May to October; May to September is a true monsoon, with 200–312 mm7.9–12 in a month and a peak in August (312 mm12 in). Outside the rainy season, November to March is dry.
June is the hottest month (highs of 33 °C91 °F) and January the coldest (20 °C68 °F). Annual rainfall is about 1,648 mm65 in.
The nearest destinations that fit the Tropical preset in the months when Hanoi does not:
The interactive map colours the whole world by how well it fits the weather you like, in any month, and shows this chart for any place you tap.