Tomorrow's Weather Forecast - Colombo

Tomorrow’s Outlook

Tomorrow will be 2°C cooler than today. Expect heavy rain in the morning and afternoon and evening and night, with rain chances climbing as high as 98%. That risk lines up with humidity averaging 85% through the day the more moisture in the air, the more readily clouds build into showers. Humidity stays high near 85%, so it will feel muggier and stickier than the temperature alone suggests. A light breeze near 17 km/h is expected. Sunrise is at 6:01 AM and sunset at 6:11 PM, for about 12h 11m of daylight.

Tomorrow: 29°/ 25°; Today31° / 27°

Tomorrow’s Hourly Weather Outlook

Morning6 AM – Noon28°

Rain probability: 94%
Wind speed: 15 km/h

AfternoonNoon – 6 PM29°

Rain probability: 98%
Wind speed: 17 km/h

Evening6 PM – Midn26°

Rain probability: 92%
Wind speed: 13 km/h

NightMidn – 6 AM26°

Rain probability: 82%
Wind speed: 8 km/h

24-Hour Rain & Temperature Forecast

Tomorrow12 Sep

··

0:00

1:00

2:00

3:00

4:00

5:00

6:00

7:00

8:00

9:00

10:00

11:00

12:00

13:00

14:00

15:00

16:00

17:00

18:00

19:00

20:00

21:00

22:00

23:00

Temperature · peaks at +29°C

+27

+26

+25

+26

+27

+29

+28

+25

+26

+25

+26

Wind & gusts · m/s

Rain probability · peaks at 98% at 13:00

61%

74%

82%

81%

76%

71%

69%

67%

69%

76%

86%

94%

97%

98%

97%

94%

90%

84%

76%

73%

78%

87%

92%

Expected rainfall · 10.9mm total · peak at 19:00

0.1

0.4

0.3

0.7

0.8

0.9

0.1

0.2

0.4

0.1

0.2

0.1

0.2

4.1

0.6

0.5

0.3

0.2

Planning Advice for Tomorrow

Clothing: Waterproof jacket and umbrella strongly recommended.

Outdoor: Not ideal for outdoor plans or car washes — heavy rain expected.

Travel: Expect traffic slowdowns from wet roads. Allow extra time.

Sunrise & Sunset

Sunrise

6:01 AMDawn 5:31 AM

Total Daylight

12h 11m

Full day forecastSolar noon 12:06 PM

Sunset

6:11 PMDusk 6:41 PM

vs today0 min daylight

Sunrise shiftSame time

Sunset shift1 min earlier

5-Day Weather Forecast

Weather Insight

Colombo is forecast to reach a high of 29°C tomorrow, with an overnight low around 25°C. That's 1° above the long-term average high of 28°C for this time of year. Expect a high chance of rain (98% probability) and a gentle breeze averaging 17 km/h. Air quality is currently Moderate (AQI 64), driven mainly by PM2.5 at 14 μg/m³.

Today vs Normal

31°C+3° above normal

The long-term average high for today is 28°C.

12 of the last 28 days with published data ran above normal.

That's a break from the pattern - today's forecast runs above normal even though the recent stretch mostly ran below.

Red = above normal, blue = at or below · last 12 days

Air Quality

Moderate

Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.

Weather Insight

Today vs Normal

31°C+3° above normal

The long-term average high for today is 28°C.

12 of the last 28 days with published data ran above normal.

That's a break from the pattern - today's forecast runs above normal even though the recent stretch mostly ran below.

Red = above normal, blue = at or below · last 12 days

Air Quality

Moderate

Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.