Sri Lanka Colombo Weather in October — Climate Guide
October in Colombo is low
October is low for Colombo.
October is the second inter-monsoon and one of Colombo's wettest months, with heavy, frequent afternoon and evening thunderstorms affecting much of the island. It averages a warm, very humid 30°C/24°C with around 350mm of rain.
This is the rainiest stretch to visit the city — prices are at their lowest and crowds are thin, but day trips and beach plans are unreliable, and storms can be dramatic. Deepavali (Diwali), the Hindu festival of lights, often falls in late October or November, lighting up Tamil communities with lamps and sweets.
Travel score
Colombo October Weather Stats
Avg High
30°C
Avg Low
24°C
Rainy Days
19
350mm total
Sunshine
6h
Daily avg
Humidity
80%
muggy
UV Index
11
Extreme
Wind
11 km/h
Gusts 24
Crowds
Quiet
At attractions
October Sunrise & Sunset
Air Quality
PM2.5
17 μg/m³
PM10
32 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
36°C
Nighttime
26°C
Humidity and wind affect how the actual temperature feels.
Wind
11 km/h
Max gust 24 km/h
Activities Recommended for October
October Travel Pros & Cons
Pros
- Lowest prices and quietest sights
- Deepavali festivities (Oct/Nov)
- Clear morning windows before storms
- Lush, green landscapes
Cons
- Wettest period — heavy thundery rain
- Beach and day-trip plans unreliable
- Very high humidity
- Possible storm-related disruptions
October Events & Festivals
- Second inter-monsoon — wettest period, island-wide thundery rain
- Vap Poya (October full moon)
- Deepavali (Diwali) often falls Oct/Nov — Hindu festival of lights
- Low season — lowest prices but heaviest rain
Colombo in October — Full Picture
October is the second inter-monsoon and one of Colombo's wettest months, with heavy, frequent afternoon and evening thunderstorms affecting much of the island. It averages a warm, very humid 30°C/24°C with around 350mm of rain.
This is the rainiest stretch to visit the city — prices are at their lowest and crowds are thin, but day trips and beach plans are unreliable, and storms can be dramatic. Deepavali (Diwali), the Hindu festival of lights, often falls in late October or November, lighting up Tamil communities with lamps and sweets.
Mornings sometimes stay clear before storms build in the afternoon, so front-load outdoor plans.
Note: this month suits flexible travelers focused on city sights, food, and culture rather than beaches. Carry full rain gear, expect short power or traffic disruptions during heavy storms, and keep itineraries adaptable.
What to Wear & What to Pack
Second inter-monsoon — warm and very humid around 30°C/24°C with the year's heaviest, most frequent rain and thunderstorms. Light quick-dry clothing, a proper umbrella and rain jacket, waterproof shoes. SPF for sunny breaks.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
31.7°C
25°C
13/mo
Summer (Jun·Jul·Aug)
30°C
26°C
12/mo
Autumn (Sep·Oct·Nov)
Current30°C
24.3°C
16/mo
Winter (Dec·Jan·Feb)
30.7°C
23°C
8.3/mo
Colombo Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| January (Best) | 31° | 23° | 8d·60mm | 8h | 75% | 11 | Busy | Peak |
| February (Best) | 31° | 23° | 6d·70mm | 9h | 73% | 12 | Busy | Peak |
| March (Best) | 32° | 24° | 8d·110mm | 8.5h | 75% | 12 | Busy | Shoulder |
| 32° | 25° | 14d·230mm | 7.5h | 78% | 12 | Moderate | Shoulder | |
| 31° | 26° | 17d·350mm | 6.5h | 80% | 11 | Quiet | Low season | |
| 30° | 26° | 15d·220mm | 6.5h | 79% | 11 | Quiet | Low season | |
| 30° | 26° | 11d·135mm | 7h | 78% | 11 | Moderate | Shoulder | |
| 30° | 26° | 10d·110mm | 7.5h | 77% | 11 | Moderate | Shoulder | |
| 30° | 25° | 12d·160mm | 7h | 78% | 11 | Quiet | Low season | |
| 30° | 24° | 19d·350mm | 6h | 80% | 11 | Quiet | Low season | |
| 30° | 24° | 17d·320mm | 6.5h | 80% | 11 | Moderate | Shoulder | |
| December (Best) | 30° | 23° | 11d·150mm | 7.5h | 77% | 11 | Busy | Peak |
View Other Months
Colombo October Hotel Picks
Frequently Asked Questions
Is October a good time to visit Colombo?
Colombo in October is low. Tourist crowds are quiet and flight/hotel prices are low season.
What's the average temperature in Colombo in October?
Colombo October averages a high of 30°C and a low of 24°C.
Does it rain much in Colombo in October?
Colombo October averages 350mm of rainfall over about 19 rainy days.
What should I wear in Colombo in October?
Second inter-monsoon — warm and very humid around 30°C/24°C with the year's heaviest, most frequent rain and thunderstorms. Light quick-dry clothing, a proper umbrella and rain jacket, waterproof shoes. SPF for sunny breaks.
What time are sunrise and sunset in Colombo in October?
Colombo October sunrise is 05:55 and sunset is 18:00, with 12h 05min of daylight.
What's the air quality like in Colombo in October?
Colombo October air quality (AQI) averages 42, rated Good. PM2.5 averages 17μg/m³.
What activities are recommended in Colombo in October?
In October, Colombo is great for Deepavali festivities (Oct/Nov), Indoor temples and the National Museum, Old Dutch Hospital dining.
Is October peak season in Colombo?
Colombo October crowds are quiet and prices are low season. You can travel relatively comfortably without long queues.
Best Months to Visit Colombo
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.