The biggest temperature swing occurs between November and December, as typical highs shift from 25.4°C / 77.7°F to 21°C / 69.9°F (about 4.3°C / 7.8°F).
| Month | Low Temperature | High Temperature | Category |
|---|---|---|---|
| January | 13.6°C | 19.9°C | MILD |
| February | 15.3°C | 21.9°C | MILD |
| March | 18.2°C | 25°C | WARM |
| April | 21.7°C | 28.9°C | WARM |
| May | 24.3°C | 31.2°C | HOT |
| June | 26.1°C | 32.7°C | HOT |
| July | 26.1°C | 32.4°C | HOT |
| August | 25.5°C | 31.5°C | HOT |
| September | 24.2°C | 30.3°C | HOT |
| October | 21.7°C | 28.4°C | WARM |
| November | 18.3°C | 25.4°C | WARM |
| December | 14.2°C | 21°C | MILD |
June has the warmest typical feels-like highs (39.4°C / 102.8°F), while January is coolest (19.9°C / 67.8°F).
| Month | Low Feels Like | High Feels Like | Category |
|---|---|---|---|
| January | 13°C | 19.9°C | MILD |
| February | 15.4°C | 22.5°C | WARM |
| March | 19.5°C | 27.1°C | WARM |
| April | 24.6°C | 33.1°C | HOT |
| May | 28.6°C | 37°C | HOT |
| June | 31.5°C | 39.4°C | HOT |
| July | 31.7°C | 39.3°C | HOT |
| August | 31°C | 38.5°C | HOT |
| September | 28.8°C | 36.1°C | HOT |
| October | 24.6°C | 31.9°C | HOT |
| November | 19.5°C | 27.2°C | WARM |
| December | 13.6°C | 21.1°C | MILD |
August is wettest at 336.2 mm / 13.24 inches, while February is driest at 32.5 mm / 1.28 inches.
| Month | Baseline | Rainfall | Category |
|---|---|---|---|
| January | -88.9 mm | 41.3 mm | LIGHT |
| February | -88.9 mm | 32.5 mm | LIGHT |
| March | -88.9 mm | 59.1 mm | LIGHT |
| April | -88.9 mm | 99.4 mm | MODERATE |
| May | -88.9 mm | 233 mm | VERY WET |
| June | -88.9 mm | 231.3 mm | VERY WET |
| July | -88.9 mm | 276.3 mm | VERY WET |
| August | -88.9 mm | 336.2 mm | VERY WET |
| September | -88.9 mm | 266.3 mm | VERY WET |
| October | -88.9 mm | 138.7 mm | WET |
| November | -88.9 mm | 58.9 mm | LIGHT |
| December | -88.9 mm | 32.7 mm | LIGHT |
May has the strongest peak UV (around index 9).
| Month | Baseline | UV Index | Category |
|---|---|---|---|
| January | 0 | 6.5 | HIGH |
| February | 0 | 7.6 | HIGH |
| March | 0 | 8.5 | VERY HIGH |
| April | 0 | 8.9 | VERY HIGH |
| May | 0 | 9 | VERY HIGH |
| June | 0 | 9 | VERY HIGH |
| July | 0 | 9 | VERY HIGH |
| August | 0 | 9 | VERY HIGH |
| September | 0 | 8.7 | VERY HIGH |
| October | 0 | 8 | HIGH |
| November | 0 | 6.9 | HIGH |
| December | 0 | 5.8 | MODERATE |
Daylight ranges from 10.9h in December to 13.4h in June.
| Month | Baseline | Daylight Hours | Category |
|---|---|---|---|
| January | 0h | 11h | BALANCED |
| February | 0h | 11.5h | BALANCED |
| March | 0h | 12h | BALANCED |
| April | 0h | 12.6h | BALANCED |
| May | 0h | 13.1h | LONG |
| June | 0h | 13.4h | LONG |
| July | 0h | 13.3h | LONG |
| August | 0h | 12.8h | BALANCED |
| September | 0h | 12.3h | BALANCED |
| October | 0h | 11.7h | BALANCED |
| November | 0h | 11.1h | BALANCED |
| December | 0h | 10.9h | BALANCED |
August is most humid (85.8%), while December is driest (72.5%).
| Month | Baseline | Humidity (avg) | Category |
|---|---|---|---|
| January | 67.8% | 76.2% | MUGGY |
| February | 67.8% | 78% | MUGGY |
| March | 67.8% | 80.5% | MUGGY |
| April | 67.8% | 81.3% | MUGGY |
| May | 67.8% | 81.2% | MUGGY |
| June | 67.8% | 80.9% | MUGGY |
| July | 67.8% | 82.5% | MUGGY |
| August | 67.8% | 85.8% | MUGGY |
| September | 67.8% | 84% | MUGGY |
| October | 67.8% | 78.6% | MUGGY |
| November | 67.8% | 76.1% | MUGGY |
| December | 67.8% | 72.5% | HUMID |
April has the strongest typical average wind (9.2 km/h / 5.7 mph), while August is calmest (6.5 km/h / 4.0 mph).
| Month | Baseline | Wind (avg) | Category |
|---|---|---|---|
| January | 5.4 km/h | 7.7 km/h | CALM |
| February | 5.4 km/h | 8.3 km/h | CALM |
| March | 5.4 km/h | 8.6 km/h | CALM |
| April | 5.4 km/h | 9.2 km/h | CALM |
| May | 5.4 km/h | 8.6 km/h | CALM |
| June | 5.4 km/h | 7.6 km/h | CALM |
| July | 5.4 km/h | 7.4 km/h | CALM |
| August | 5.4 km/h | 6.5 km/h | CALM |
| September | 5.4 km/h | 6.8 km/h | CALM |
| October | 5.4 km/h | 7.6 km/h | CALM |
| November | 5.4 km/h | 7.5 km/h | CALM |
| December | 5.4 km/h | 7.6 km/h | CALM |
April is windiest by P95 gust signal (37.8 km/h / 23.5 mph).
| Month | Baseline | Wind (gusts) | Category |
|---|---|---|---|
| January | 0 km/h | 33.8 km/h | BREEZY |
| February | 0 km/h | 36.4 km/h | WINDY |
| March | 0 km/h | 37.1 km/h | WINDY |
| April | 0 km/h | 37.8 km/h | WINDY |
| May | 0 km/h | 36 km/h | WINDY |
| June | 0 km/h | 33.5 km/h | BREEZY |
| July | 0 km/h | 34.2 km/h | BREEZY |
| August | 0 km/h | 33.5 km/h | BREEZY |
| September | 0 km/h | 34.2 km/h | BREEZY |
| October | 0 km/h | 34.9 km/h | BREEZY |
| November | 0 km/h | 33.5 km/h | BREEZY |
| December | 0 km/h | 33.5 km/h | BREEZY |
August has the most rain days (~24.9), while December has the fewest (~8.8). Rain days count the average number of days in a month with measurable rain (about 0.1 mm or more).
| Month | Baseline | Rain Days | Category |
|---|---|---|---|
| January | 2.4 days | 12.2 days | FREQUENT |
| February | 2.4 days | 11.9 days | FREQUENT |
| March | 2.4 days | 15.8 days | VERY FREQUENT |
| April | 2.4 days | 15.1 days | VERY FREQUENT |
| May | 2.4 days | 19.9 days | VERY FREQUENT |
| June | 2.4 days | 20.6 days | VERY FREQUENT |
| July | 2.4 days | 23.5 days | VERY FREQUENT |
| August | 2.4 days | 24.9 days | VERY FREQUENT |
| September | 2.4 days | 21.2 days | VERY FREQUENT |
| October | 2.4 days | 14.8 days | FREQUENT |
| November | 2.4 days | 10.2 days | FREQUENT |
| December | 2.4 days | 8.8 days | SOME |
August has the most heavy rain/washout risk days (~16). Heavy rain days are the average number of days likely to bring stronger downpours that can disrupt outdoor plans.
| Month | Baseline | Heavy Rain Days | Category |
|---|---|---|---|
| January | 0 days | 2 days | OCCASIONAL |
| February | 0 days | 2 days | OCCASIONAL |
| March | 0 days | 3 days | FREQUENT |
| April | 0 days | 5 days | FREQUENT |
| May | 0 days | 11 days | PERSISTENT |
| June | 0 days | 12 days | PERSISTENT |
| July | 0 days | 13 days | PERSISTENT |
| August | 0 days | 16 days | PERSISTENT |
| September | 0 days | 13 days | PERSISTENT |
| October | 0 days | 6 days | PERSISTENT |
| November | 0 days | 3 days | FREQUENT |
| December | 0 days | 2 days | OCCASIONAL |
June has the highest heat-risk day count (~18 days). Heat days are the average number of days that exceed our location-specific heat-risk threshold.
| Month | Baseline | Heat Days | Category |
|---|---|---|---|
| January | 0 days | 0 days | LOW |
| February | 0 days | 0 days | LOW |
| March | 0 days | 1 days | LOW |
| April | 0 days | 7 days | HIGH |
| May | 0 days | 11 days | SEVERE |
| June | 0 days | 18 days | SEVERE |
| July | 0 days | 18 days | SEVERE |
| August | 0 days | 13 days | SEVERE |
| September | 0 days | 6 days | HIGH |
| October | 0 days | 1 days | LOW |
| November | 0 days | 0 days | LOW |
| December | 0 days | 0 days | LOW |
Daylight varies from 10.9 hours in December (winter) to 13.4 hours in June (summer), which is a difference of 2.5 hours.
Northern Hemisphere seasons shape the weather patterns throughout the year. Here's what to expect in each season:
| Ranking Goal | #1 | #2 | #3 | #4 |
|---|---|---|---|---|
| Lowest rain risk | Jan 2 risk days | Feb 2 risk days | Dec 2 risk days | Mar 3 risk days |
| Lowest heatwave risk | Jan 0 risk days | Feb 0 risk days | Nov 0 risk days | Dec 0 risk days |
| Lowest cold risk | Mar 0 risk days | Apr 0 risk days | May 0 risk days | Jun 0 risk days |
| Lowest wind disruption risk | Jun 34 km/h | Aug 34 km/h | Dec 34 km/h | Nov 34 km/h |
| Most comfortable evenings | Nov 82 / 100 | Feb 78 / 100 | Mar 76 / 100 | Dec 75 / 100 |
| Best outdoor reliability | Dec 100 / 100 | Jan 99 / 100 | Nov 97 / 100 | Feb 87 / 100 |
Click any month for detailed weather information and packing advice.
Get personalized month rankings based on weather comfort, outdoor activity suitability, and seasonal conditions.
View Best Time to VisitThe best months to visit Hanoi depend on your preferences. For warm weather, June is typically the warmest month. For dry conditions, February, December, January tend to have the least rainfall. Consider your priorities, and whether you prefer warmer temperatures, drier weather, or longer daylight hours.
June is typically the warmest month in Hanoi, with average high temperatures reaching around 33°C (91°F). This is peak summer weather, ideal for outdoor activities and sightseeing.
January is usually the coldest month, with average low temperatures dropping to around 14°C (57°F). Pack warm layers if visiting during this time, especially for evening activities.
August typically sees the most rainfall in Hanoi, averaging around 336mm (13.2 inches). It's wise to pack waterproof layers and have some indoor backup plans if you're visiting during this month.
February is typically the driest month, with average rainfall of just 33mm (1.3 inches). This makes it an excellent time for outdoor exploration and activities with minimal risk of rain disruption.
Temperatures in Hanoi range from average lows of 21°C (69°F) to highs of 27°C (81°F). This variation means you'll want to pack differently depending on when you visit, as layers are key for adapting to the seasonal changes.
Yes, sun protection is important in Hanoi. UV levels can reach 9 during peak months, which is considered very high. Pack sunscreen (SPF 30+), sunglasses, and a hat, especially if you'll be outdoors for extended periods.