2026 Climate Averages

Weather: Colombo — September

It's a rainy period, but great for indoor activities, museums, and lower prices.

☔ Climate Overview

September is a wet time to visit Colombo. Hot conditions with temperatures reaching 30°C—stay hydrated and seek shade. This is one of the wettest months—waterproof gear is essential. Being off-peak, you'll find better deals and fewer crowds.

6.1
GoTripzi Score Good

Based on weather comfort, crowds, prices, and activity options

Avg High

30°C

Avg Low

25°C

Rainy days

29days

Daylight

12.2h

Feels like 36°C / 30°C — humidity makes it feel warmer

Rainfall

256mm

Sunshine

8.9h/day

Humidity

86%

Very Muggy
Sun Strength

6.7

High
Wind

17 km/h (gusts 39)

Is September a good time to visit Colombo?

It's a rainy period, but great for indoor activities, museums, and lower prices.

Now

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Feels like --
Wind --
Humidity --
UV Index --
Local time —

Air Quality

Travel Context

  • Crowds
    Very Quiet
  • Travel Costs Shoulder Rates

Daylight

Sunrise

06:02

Sunset

18:12

12.2h daylight

Visiting Colombo in September: Pros & Cons

Pros

  • Fewer crowds and better hotel deals

Cons

  • Frequent rain may disrupt outdoor activities
  • High humidity makes the heat feel oppressive

Things to Do in September

Recommended for This Weather

🏛️ Museums & galleries
🍳 Cooking classes & food tours
🎭 Cultural tours & local experiences

Colombo Weather by Month

Month Avg High Avg Low Rain Sunshine Humidity UV Index Crowds Condition
Jan 32°C 24°C 12d (115mm) 9.5h
77% Muggy
7.2 Very High
Excellent
Feb 34°C 24°C 6d (34mm) 10.7h
69% Muggy
8.6 Very High
Excellent
Mar 34°C 25°C 16d (98mm) 10.5h
74% Muggy
8.6 Very High
Excellent
Apr 33°C 25°C 26d (177mm) 10.4h
81% Very Muggy
8.2 Very High
Wet
May 31°C 26°C 30d (355mm) 8.6h
86% Very Muggy
6.5 High
Wet
Jun 31°C 26°C 29d (242mm) 9.5h
86% Very Muggy
6.7 High
Wet
Jul 30°C 26°C 28d (222mm) 9.2h
85% Very Muggy
6.8 High
Wet
Aug 30°C 26°C 27d (236mm) 9.6h
85% Very Muggy
7.1 Very High
Wet
Sep Current 30°C 25°C 29d (256mm) 8.9h
86% Very Muggy
6.7 High
Wet
Oct 30°C 25°C 29d (384mm) 8.5h
87% Very Muggy
6.3 High
Wet
Nov 30°C 24°C 25d (452mm) 7.8h
87% Very Muggy
5.9 High
Wet
Dec 31°C 24°C 17d (158mm) 9.2h
83% Very Muggy
6.6 High
Excellent

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3.8

Where to Stay

See hotels, apartments & rentals around Colombo – live prices from Booking.com, Expedia, Vrbo and more

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Colombo

Gateway city with colonial Fort district, Buddhist temples, beach promenade, and tea culture.

View Full Destination Guide

What to Pack for September

Light, breathable fabrics like cotton and linen are essential. Opt for loose-fitting clothing in light colors to stay cool. A waterproof jacket and shoes are non-negotiable — showers are frequent. Don't forget a wide-brimmed hat and high-SPF sunscreen — the sun is strong.

Tropical Very Quiet

🎒Personalized Packing List

Tell us about your trip and we'll create a custom packing list based on the weather.

Your Packing List

📋Essentials
👕Clothing
👟Footwear
🎒Accessories
🧴Toiletries & Health

Planning a trip to Colombo?

💰 Off-peak — great deals available now

Frequently Asked Questions

Is September a good time to visit Colombo?
September is typically wet for visiting Colombo, with average highs of 30°C and around 29 rainy days. Plan your activities accordingly—outdoor sightseeing is best on dry days, while rainy days are perfect for museums and indoor attractions.
Does it get cold at night in Colombo in September?
Nights stay pleasantly warm in Colombo during September, around 25°C. Light evening wear is sufficient, and outdoor dining is very comfortable. Many locals and visitors enjoy late-night walks and outdoor activities after sunset.
What should I pack for Colombo in September?
With highs of 30°C and lows of 25°C in September, we recommend: Compact umbrella, Waterproof jacket/shell, Water-resistant shoes, Lightweight breathable clothes. Layering is key as temperatures can vary between air-conditioned interiors and outdoors. Comfortable walking shoes are essential for cobblestone streets.
Does it rain a lot in Colombo in September?
Colombo typically sees around 29 rainy days in September. Rain is usually in the form of brief showers rather than all-day downpours, so a compact umbrella is sufficient. Mornings tend to be drier, making them ideal for outdoor sightseeing.
How many hours of daylight are there in Colombo in September?
In September, Colombo gets approximately 12.2 hours of daylight per day. This affects how much sightseeing you can fit in—longer days mean more time for outdoor activities, while shorter days are perfect for cozy museum visits and early dinners.
Is September peak season in Colombo?
No, September is not peak season in Colombo. Expect better value on accommodation, shorter queues at attractions, and fewer tourists at popular spots. This is an excellent time to experience the city like a local and enjoy a more authentic atmosphere.

Weather Data: Based on 2020–2025 historical climate data from Open-Meteo

Solar calculations: SunCalc (timezone: Asia/Colombo)

Last Updated: February 2026

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