The highest day temperature in July 2025 was 92°F. The lowest night temperature was 76°F. The average values for day and night temperatures during July were 85.2°F и 77.7°F respectivly.

Most of the days in July are gloomy but you can also expect sunny days.

Precipitation total in July for Vientiane is 9.6 in. It makes july one of the most rainy months of the year.

The average wind speed in July is 4.2 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Vientiane in July is 5.5 hours.