When to go · Phonsavan

Phonsavan in September

Avoid month. Outside the best window (Nov–Mar). Across Laos: Floods along the Mekong in some years; Kuang Si pools brown and fast.

Key facts

Verdict: Avoid
Temperature: 27°C (81°F)81°F (27°C) / 18°C (64°F)64°F (18°C); average high / low
Rain days: 17
Crowds: Low; Laos overall
Prices: Low; Laos overall

Plan around it

Verdict

AvoidLaos month rating

Outside the best window (Nov–Mar). Across Laos: Floods along the Mekong in some years; Kuang Si pools brown and fast.

September is rated avoid. These months rate higher:

Long-term averages

PhonsavanHighs around 27 °C (81 °F), lows around 18 °C (64 °F), rain on about 17 daysHighs around 81 °F (27 °C), lows around 64 °F (18 °C), rain on about 17 days
North, Laos · Luang Prabang, Nong Khiaw, Luang Namtha, Phonsavanrainy
Cool, misty mornings Dec–Jan (near 10 °C (50 °F) at altitude); the burning season (Feb–Apr) brings thick smoke; rains wash roads May–Oct.Cool, misty mornings Dec–Jan (near 50 °F (10 °C) at altitude); the burning season (Feb–Apr) brings thick smoke; rains wash roads May–Oct.

Laos overall: Floods along the Mekong in some years; Kuang Si pools brown and fast.

Weather, crowds and prices for any two months in Phonsavan, side by side.

First month

Second month

September: Outside the best window (Nov–Mar). Across Laos: Floods along the Mekong in some years; Kuang Si pools brown and fast.

January: Inside Phonsavan's best window: Nov–Mar.

Phonsavan: figures are long-term averages from this guide, not a forecast.