Weather in Hanoi in September

In September, Hanoi’s weather is characterised by warm temperatures, high humidity, and frequent rainfall. The temperatures are typically high during the day but gradually cool in the evening. Travellers can anticipate some wet days but will still find opportunities for outdoor exploration, particularly enjoyable when seasonal highlights come into play.

September Climate Overview

• Average Temperature: 25°C to 31°C
• Rainfall: 120mm to 190mm
• Sunshine Hours: 5 to 6 hours per day
• Humidity: Around 85%
• Wind Speed: 10 to 15 km/h

What to Expect in September

Daytime Conditions

Typically, the daytime in September features warm temperatures, with highs reaching up to 31°C. The sun can be quite intense when it breaks through the clouds, so sunscreen is advisable. Alongside the warmth, humidity is high, which can make it feel hotter than it actually is.

Rainfall Patterns

September in Hanoi is part of the wet season, with rain being a common occurrence. Expect scattered showers throughout the month, some of which can be heavy. It’s important to plan indoor activities or carry an umbrella if outdoor exploration is desired.

Evening Conditions

Evenings often bring relief from the day’s heat, with temperatures cooling down to more comfortable levels. However, humidity remains relatively high. Gentle breezes in the evening provide comfort, making it suitable for a leisurely stroll or outdoor dinner.

Best Activities in Hanoi in September

• Outdoor Activities: Enjoy hiking in nearby areas or explore bustling local markets, which are lively and rich with fresh seasonal produce.
• Seasonal Highlights: September is ideal for witnessing the lush green landscape post-rain and participating in local harvest festivals.
• Water-based or Nature-based Activities: While Hanoi itself isn’t coastal, nearby lakes and parks provide serene spots for picnics or boat rides.

What to Pack for September

• Light, breathable clothing for daytime and a light jacket for cooler evenings
• Protection from sun or rain (hat, sunscreen, umbrella, etc.)
• Comfortable footwear suitable for city walks and light trekking
• Reusable water bottle to stay hydrated