| CITY/ TOWN | HUMIDITY (%) | RAINY SEASON | DRY SEASON | ANNUAL RAINFALL (mm) | HOTTEST MONTH (oC) | COLDEST MONTH (oC) |
| Can Tho | 82 | May-Nov | Dec-Apr | 1560 | Apr: 33.9 | Jan: 21.9 |
| Dalat | 84 | Apr-Nov | Dec-Mar | 1820 | Apr: 26.8 | Feb: 10.0 |
| Danang | 83 | Jul-Jan | Feb-Jun | 1974 | Jun: 34.2 | Jan: 19.0 |
| Dien Bien | 84 | Apr-Sep | Oct-Mar | 1567 | May: 32.2 | Jan: 11.0 |
| Hanoi | 83 | May-Oct | Nov-Apr | 1680 | Jun: 32.8 | Jan: 13.8 |
| Halong | 82 | May-Oct | Nov-Apr | 1994 | Jul: 31.6 | Jan: 13.5 |
| Hue | 88 | Jul-Jan | Feb-Jun | 2890 | Aug : 34.5 | Jan: 17.2 |
| Nha Trang | 82 | Sep-Dec | Jan-Aug | 1441 | Aug: 33.2 | Jan: 20.5 |
| Pleiku | 85 | May-Oct | Nov-Apr | 2684 | Apr: 30.7 | Jan: 14.0 |
| Qui Nhon | 81 | Sep-Dec | Jan-Aug | 1647 | Aug: 34.5 | Jan: 20.6 |
| Saigon | 82 | May-Nov | Dec-Apr | 1979 | Apr: 34.8 | Jan: 21.0 |
| Sapa | 87 | Mar-Nov | Dec-Feb | 2769 | Aug: 23.2 | Jan: 06.2 |
Health equipment
No actual vaccinations are officially required. Malaria prophylaxis is no longer recommended but visitors are advised to check with their doctors or travel immunization clinics regarding the advisability of inoculation against typhoid, tetanus, hepatitis A & B.
What to take with you?
There are a few things you should not travel without:
- A map, certainly
- Photocopies of your passport and visa.
- Cash in US$ 20's and $ 100's.
- A folding umbrella if you plan to visit during the rainy season. The wettest months are July and August.
- Zip lock bags. They are cheap, disposable, and keep all kinds of things fresh and dry.
- Hotel cards: You should keep your hotel cards or brochures to show people to get guidance in case of missing way back home.
- Business Cards. You will discover that practically everyone in Vietnam has a calling card of some kinds. The proper way to offer your card is to hold it by the corners with both hands.
What to wear ?
Appropriate dress differs from North to South. Southern Vietnam is tropical year round and people dress comfortably and casually. Lightweight cotton and wool fabrics will be comfortable at any time of year. While they may resist wrinkles, synthetics and are blends miserably hot. Generally, short pants are inappropriate anywhere but a beach resort or a farm and you will look like a foolish tourist on the streets of most cities. Jeans are almost always fashionable except for business occasions.
Winter (November through April) can be cool in Hanoi, and a coat may be necessary. Dress here is a bit more formal and somber than the fashionable South. If traveling on business, jackets and ties are usually appropriate, regardless of the weather. Saigon's business community is very image oriented. It's alright to ask your business partners here what kind of attire is appropriate and expected.
Remember that Vietnam is a tropical country. Most of the year it is warm and humid. If you are not used to tropical weather, be prepared to shower and change your clothes two or three times a day. During rainy season in Saigon the rain is often short (20-30 minutes) and some times quite sudden. Practically every hotel in Vietnam has laundry service, which is usually quite inexpensive.