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Weather & Climate in Unawatuna, Sri Lanka
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Unawatuna has a warm climate with an average annual temperature of 80°F (27°C). Winters average 79°F in January while summers reach 80°F in July / relatively mild seasonal variation. The area gets 134 sunny days per year, below the national average of 205. Annual precipitation totals 116.7 inches (wetter than the 38-inch national average). The city sits at an elevation of 43 feet.
Temperature
79°F Jan (26°C)
80°F Jul (27°C)
| Annual Average | 80.0°F |
| 48% above US avg | |
| January Average | 79°F (26°C) |
| July Average | 80°F (27°C) |
| Sunny Days | 134 days/yr |
Geography
| Elevation | 43 ft (13 m) |
| Area | 16.5 sq mi (42.6 km²) |
| Population Density | 122/sq mi |
| Coordinates | 6.0212°N, 80.2503°W |
| Timezone | Asia/Colombo |
Precipitation & Snow
Air Quality
Hurricane History
2 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 1.
| Year | Name | Category | Max Wind | Closest |
| 2000 | Unnamed | Category 1 | 104 mph | 288 km |
| 1992 | Unnamed | Category 1 | 63 mph | 253 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 79°F (26°C) | 4.9 in | Coldest |
| February | 79°F (26°C) | 4.6 in | Driest |
| March | 81°F (27°C) | 6.5 in | |
| April | 82°F (28°C) | 10.6 in | Warmest |
| May | 82°F (28°C) | 15.2 in | Wettest |
| June | 81°F (27°C) | 10.4 in | |
| July | 80°F (27°C) | 8.5 in | |
| August | 80°F (27°C) | 8.8 in | |
| September | 80°F (27°C) | 10.5 in | |
| October | 80°F (26°C) | 14.8 in | |
| November | 79°F (26°C) | 13.2 in | |
| December | 79°F (26°C) | 8.6 in |
Unawatuna has a seasonal temperature swing of 3°F / from 79°F in January to 82°F in April. Total annual precipitation is 116.7 inches, with May being the wettest month (15.2") and February the driest (4.6").