Town in Quang Tri, Vietnam
Phong Nha weather by month and the best time to visit
When to go to Phong Nha
Mar–Jul is dry and best for caves and river trips. Sep–Nov brings typhoons and floods that can close caves and roads; winter is cool and drizzly.
Phong Nha weather by month
Average daily high, rainfall and conditions.
- Jan24°36 mm
- Feb27°23 mm
- Mar30°41 mm
- Apr33°60 mm
- May34°122 mm
- Jun33°111 mm
- Jul32°192 mm
- Aug32°233 mm
- Sep31°345 mm
- Oct29°379 mm
- Nov27°140 mm
- Dec24°79 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 24°C76°F | 17°C62°F | 36 mm | 87% | Pleasant |
| February | 27°C80°F | 17°C63°F | 23 mm | 85% | Pleasant |
| March | 30°C86°F | 20°C67°F | 41 mm | 82% | Pleasant |
| April | 33°C92°F | 22°C72°F | 60 mm | 79% | Hot & humid |
| May | 34°C92°F | 25°C76°F | 122 mm | 80% | Hot & humid |
| June | 33°C91°F | 26°C78°F | 111 mm | 81% | Hot & humid |
| July | 32°C90°F | 25°C77°F | 192 mm | 82% | Rainy |
| August | 32°C89°F | 25°C77°F | 233 mm | 85% | Rainy |
| September | 31°C88°F | 24°C76°F | 345 mm | 87% | Very wet |
| October | 29°C84°F | 23°C73°F | 379 mm | 88% | Very wet |
| November | 27°C81°F | 21°C69°F | 140 mm | 88% | Pleasant |
| December | 24°C76°F | 18°C64°F | 79 mm | 88% | Pleasant |
Best months across Vietnam
| Place | Best months | Warmest month |
|---|---|---|
| Ho Chi Minh City | Dec–Mar | Mar (37°C) |
| Hanoi | Mar–Apr, Oct–Nov | Jun (32°C) |
| Da Nang | Feb–Jun | Jun (33°C) |
| Hoi An | Feb–May | Jun (32°C) |
| Ha Long Bay | Mar–Apr, Oct–Nov | Jun (31°C) |
| Nha Trang | Jan–Jun | May (30°C) |
| Phu Quoc | Nov–Mar | May (30°C) |
| Sapa | Mar–May, Sep–Oct | Jun (26°C) |
| Hue | Feb–May | Jun (33°C) |
| Ninh Binh | Mar–May, Sep–Oct | Jun (32°C) |
| Da Lat | Dec–Mar | Apr (25°C) |
| Ha Giang | Mar–Apr, Sep–Nov | May (34°C) |
| Mui Ne | Nov–Apr | Apr (33°C) |
| Phong Nha | Mar–Jul | May (34°C) |
| Cat Ba | Apr–May, Oct–Nov | Jul (30°C) |
| Vung Tau | Nov–Apr | Apr (34°C) |
| Quy Nhon | Feb–Jun | Aug (31°C) |
| Can Tho | Dec–Apr | Apr (36°C) |
| Con Dao | Mar–Jul | May (29°C) |
| Cao Bang | Apr, Sep–Nov | May (31°C) |
| Mai Chau | Mar–Apr, Sep–Nov | May (34°C) |
Quick answers
What is the best month to visit Phong Nha?
Mar–Jul. Mar–Jul is dry and best for caves and river trips. Sep–Nov brings typhoons and floods that can close caves and roads; winter is cool and drizzly.
When is the rainy season in Phong Nha?
Rain peaks in October with about 379 mm. Months with 150 mm or more: Jul–Oct.
What is the hottest month in Phong Nha?
May, with average highs of 34°C (92°F).
How cold does Phong Nha get?
The coolest nights are in January, averaging 17°C (62°F).
More about Phong Nha
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Sources
- NASA POWER climatology (2001–2020)
- Vietnam National Authority of Tourism
- Oxalis Adventure (licensed Son Doong operator)
- Vietnam Railways
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Temperatures are adjusted by 2.2°C for the city's elevation. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.