Hanoi is at its most pleasant from late November to mid March. For sun, aim for early November; for walking, go from mid January to early February.
When to go five ratings · thirty-six ten-day sections · click a cell to read it
The sun season here falls in early November. It peaks in early November, at 60. That is a short window, about ten days a year. The weakest stretch is from June to August, when it drops to 7, mostly because it is too hot. The clearest skies come in November, when the sky is typically 67% covered at midday (often cloudy).
For being outside, go from late November to mid March. It peaks in early December, at 75. Avoid late May to September for this: it falls to 0, mostly because it is too hot.
The walking season here runs from mid January to early February, with a second spell in December. It peaks in mid January, at 70. The weakest stretch is from late April to early October, when it drops to 0, mostly because it is too warm.
The year, measured
The average temperature in Hanoi over the whole year is 25°C. June is the hottest month, with highs of about 33°C; January is the coldest, with lows of about 16°C. The rainy (wet) season in Hanoi runs from May to October, peaking in August with a 65% chance of rain on a given day. The dry season is November to April; March is the driest month, at 19%. Winds in Hanoi are highest in May, averaging 2.3 m/s (8 km/h), and lightest in September, at 1.7 m/s (6 km/h). The prevailing wind is from the E. The clearest skies in Hanoi come in September, when the sky is typically 60% covered; March is the cloudiest month, at 87%.
Month by month Hanoi climate by month: average temperatures year round · click a month to read it
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 20°C | 16°C | 19°C | 26% | 81% | 1.9 m/s | 70 | 16 | 63 |
| February | 20°C | 17°C | 20°C | 24% | 81% | 2.1 m/s | 67 | 21 | 58 |
| March | 24°C | 20°C | 25°C | 19% | 87% | 2.1 m/s | 62 | 40 | 33 |
| April | 27°C | 23°C | 30°C | 32% | 81% | 2.2 m/s | 28 | 43 | 10 |
| May | 31°C | 26°C | 35°C | 48% | 71% | 2.3 m/s | 7 | 24 | 1 |
| June | 33°C | 28°C | 38°C | 57% | 67% | 2.0 m/s | 0 | 8 | 0 |
| July | 33°C | 28°C | 38°C | 59% | 66% | 2.0 m/s | 0 | 8 | 0 |
| August | 32°C | 27°C | 37°C | 65% | 67% | 1.9 m/s | 1 | 11 | 0 |
| September | 31°C | 26°C | 36°C | 59% | 60% | 1.7 m/s | 2 | 19 | 0 |
| October | 28°C | 24°C | 30°C | 51% | 61% | 2.0 m/s | 25 | 46 | 8 |
| November | 26°C | 21°C | 27°C | 35% | 61% | 1.8 m/s | 45 | 50 | 21 |
| December | 21°C | 16°C | 20°C | 24% | 67% | 1.9 m/s | 70 | 18 | 62 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Hanoi weather by season
Year round, Hanoi has days of about 20°C at their warmest in January, its coolest month, and 33°C in June, its warmest; the coolest hours of the day run from 16°C to 28°C through the year, and the average temperature over the year is 25°C around the clock. Rain is most likely around August and least likely around March. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Hanoi weather in winterDecember to February
Winter in Hanoi has typical daily highs of about 20°C and lows of about 16°C, with a 25% chance of rain on a given day.
Hanoi weather in springMarch to May
Spring in Hanoi has typical daily highs of about 27°C and lows of about 23°C, with a 33% chance of rain on a given day.
Hanoi weather in summerJune to August
Summer in Hanoi has typical daily highs of about 32°C and lows of about 28°C, with a 60% chance of rain on a given day.
Hanoi weather in autumnSeptember to November
Autumn in Hanoi has typical daily highs of about 28°C and lows of about 23°C, with a 48% chance of rain on a given day.
When is the rainy season in Hanoi?
The rainy (wet) season in Hanoi runs from May to October, peaking in August with a 65% chance of rain on a given day. The dry season is November to April; March is the driest month, at 19%.
What time of year is Hanoi windiest?
Winds in Hanoi are highest in May, averaging 2.3 m/s (8 km/h), and lightest in September, at 1.7 m/s (6 km/h). The prevailing wind is from the E.
What is the average temperature in Hanoi year round?
The average temperature in Hanoi over the whole year is 25°C. June is the hottest month, with highs of about 33°C; January is the coldest, with lows of about 16°C.
Where to go instead in mid June, the weakest time here for being outside
How this is worked out
Every figure is a decade of weather-station observations blended into one typical year, in ten-day sections. The ratings, the chart and the feels-like column are read at midday local solar time. Being outside is the Easy outdoors rating, Sun is Sunbathing and Walking is Active outdoors, each out of 100: Good from 55, Ideal from 80. They describe what a time of year is usually like here, not a forecast. The dotted links open the map at that time of year; set its time of day to midday to see these numbers.