Halong Bay Weather in September

Halong Bay Weather in September
 Throughout the month of September daytime temperatures will generally reach highs of around 30°C that's about 86°F. At night the average minimum temperature drops down to around 24°C, that's 74°F. In recent times the highest recorded temperature in September has been 40°C that's 104°F, with the lowest recorded temperature 16°C, about 60°F.

The average daily relative humidity for September is around 86%.The average monthly amount of precipitation has been recorded at around 167 mm, that's 7 inches. Throughout the month you can expect to see rain or drizzle falling on 10 days of the month.

The average daily wind speed in September has been around 7 km/h, that’s the equivalent to about 5 mph, or 4 knots. In recent years the maximum sustained wind speed has reached 80 km/h, that’s the equivalent of around 49 mph, or 43 knots.Given average maximum temperatures and humidity levels caution is advised. Fatigue is possible with prolonged exposure and/or physical activity for those in high risk groups of possible heat disorders (see heat index for more information).

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