Vietnam · 15.88°N 108.33°E · monthly climate normals, judged against the Tropical preset (mean 24–33 °C75–91 °F, anything but the monsoon)
The best time to visit Hoi An is March to August, when mean temperatures run from 25 °C77 °F to 30 °C86 °F and rainfall runs 32–112 mm1.3–4.4 in a month.
The monsoon runs September to December, with 216–536 mm8.5–21 in a month and peaking in October at 536 mm21 in. June is the hottest month at 30 °C86 °F and January the coldest at 22 °C72 °F.
Figures are 30-year monthly averages (WorldClim 2.1 monthly normals 1970–2000) for the 0.25° grid cell at 15.88, 108.33 — 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: March to August.
Open Hoi An 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 Hoi An'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 | 963.8 | 2271 | showers | too cold |
| February | 401.6 | 2373 | dry | too cold |
| March | 321.3 | 2576 | dry | good |
| April | 321.3 | 2781 | dry | good |
| May | 562.2 | 2984 | dry | good |
| June | 883.5 | 3086 | showers | good |
| July | 722.8 | 3086 | showers | good |
| August | 1124.4 | 3085 | showers | good |
| September | 31212 | 2882 | monsoon | monsoon |
| October | 53621 | 2679 | monsoon | monsoon |
| November | 38415 | 2475 | monsoon | monsoon |
| December | 2168.5 | 2272 | monsoon | too cold |
| Looking for | Rule | Months that fit |
|---|---|---|
| Warm | mean 14–24 °C57–75 °F, dry or showers | January to February |
| Tropical | mean 24–33 °C75–91 °F, anything but the monsoon | March to August |
| Beach | mean 24–33 °C75–91 °F, dry or showers | March to August |
| Cool | mean 0–14 °C32–57 °F, anything but the monsoon | |
| Snow | mean below 0 °C32 °F, any rain |
Yes. The monsoon runs September to December, with 216–536 mm8.5–21 in a month and peaking in October at 536 mm21 in. Outside it, February to May is dry.
June is the hottest month at 30 °C86 °F and January the coldest at 22 °C72 °F. Annual rainfall totals about 1,976 mm78 in.
The nearest destinations that do fit the Tropical preset in the months Hoi An 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.