Dehiwala Weather in January

January in Dehiwala brings very high temperatures around 32°C (90°F) during the day, dropping to 24°C (75°F) at night, with the driest conditions of the year.

Rainfall in Dehiwala in January

This month is perfect for exploring, with the driest conditions of the year. Looking at the last 30 years, the data shows about 5 days with rain, averaging 74 mm (2.9 in) for the month. Although rain is not especially frequent, individual showers can still be quite heavy.

Temperature in Dehiwala in January

Temperatures in Dehiwala in January top out at 32°C (90°F) and drop to 24°C (75°F) overnight. Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. Nights stay warm at around 24°C (75°F), so light bedding and good ventilation are worth thinking about.

Sunshine in Dehiwala in January

The month enjoys around 248 hours of sunshine, creating mostly sunny days with good weather conditions.

Wind Speed in Dehiwala in January

Wind speeds average 2 m/s (4 knots) during January. At this speed, expect light breezes that you can feel on your face and cause leaves to rustle gently. Since this is an average, some days are calmer with barely any wind while others have more noticeable gentle breezes.

Average water temperature in January

The water is 28°C (82°F) this month — warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. January and February typically offer the best weather for Dehiwala.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Sri Lanka, check out our Dehiwala's climate page.

Dehiwala Temperature in January

Min Temperature 24°C (75°F)  

Max Temperature 32°C (90°F)  

Water Temperature 28°C (82°F) *  

Chance of Rain 16%  

Precipitation 74 mm (2.9 in)  

Rainy days 5 days  

Humidity 70% *  

Windspeed 2 m/s (4 knots) *  

Sunshine 248 hours *  

Percentage Sunshine *  

* Data from: Colombo, Sri Lanka (5 KM, 3 Miles).

Daily Historical Temperatures

48-year average (1976-2026)

Based on our historical records, temperatures in Dehiwala typically stay consistent throughout January, with daily highs averaging around 32°C (90°F). Nights are warm, with lows around 23°C (73°F).

Average temperatures in January

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Daily Historical Precipitation

48-year average (1976-2026)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in January

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Historical weather for Dehiwala in January

Browse day-by-day weather records for Dehiwala spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Dehiwala historical weather extremes in January

Based on weather observations in Dehiwala between 2001 and 2025, these are the recorded extremes during January.

• The hottest January day on record in Dehiwala reached 36°C (97°F) (January 26, 2016).
• Dehiwala experienced its chilliest January day on January 18, 2001, reaching only 25°C (77°F).
• Dehiwala registered its coldest January night on January 25, 2006, with temperatures dropping to 17°C (63°F).

What to Wear in Dehiwala in January

Warm weather calls for comfortable, breathable clothing in January. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Rain is likely on several days, so bring a good rain jacket. With water temperatures around 28°C (82°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Dehiwala in January

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

8/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Sri Lanka, check out our Dehiwala's climate page.

More climate data for Dehiwala

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Dehiwala climate overview or explore weather in Sri Lanka.