Weather & Climate in Wellesley Islands, Australia
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Wellesley Islands has a warm climate with an average annual temperature of 80°F (26°C). Winters average 84°F in January while summers reach 70°F in July / relatively mild seasonal variation. Annual precipitation totals 44.3 inches. The city sits at an elevation of 33 feet.
Temperature
84°F Jan (29°C)
70°F Jul (21°C)
| Annual Average | 79.5°F |
| 47% above US avg | |
| January Average | 84°F (29°C) |
| July Average | 70°F (21°C) |
Geography
| Elevation | 33 ft (10 m) |
| Area | 386.9 sq mi (1,002.0 km²) |
| Population Density | 3/sq mi |
| Coordinates | 16.6318°S, 139.4014°E |
| Timezone | Australia/Brisbane |
Precipitation & Snow
Air Quality
Hurricane History
8 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Megan | Category 2 | 104 mph | 271 km |
| 2019 | Trevor | Category 3 | 115 mph | 172 km |
| 2019 | Owen | Category 1 | 92 mph | 173 km |
| 2018 | Nora | Category 1 | 86 mph | 272 km |
| 1996 | Barry | Category 1 | 115 mph | 161 km |
| 1985 | Sandy | Category 4 | 121 mph | 188 km |
| 1984 | Kathy | Category 4 | 138 mph | 249 km |
| 1982 | Dominic | Category 1 | 132 mph | 292 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 84°F (29°C) | 11.8 in | Wettest |
| February | 83°F (29°C) | 11.3 in | |
| March | 83°F (28°C) | 9.7 in | |
| April | 81°F (27°C) | 1.6 in | |
| May | 77°F (25°C) | 0.3 in | |
| June | 72°F (22°C) | 0.3 in | |
| July | 70°F (21°C) | 0.1 in | Coldest |
| August | 72°F (22°C) | 0.0 in | Driest |
| September | 78°F (25°C) | 0.2 in | |
| October | 83°F (28°C) | 0.5 in | |
| November | 85°F (30°C) | 2.5 in | |
| December | 86°F (30°C) | 6.1 in | Warmest |
Wellesley Islands has a seasonal temperature swing of 16°F / from 70°F in July to 86°F in December. Total annual precipitation is 44.3 inches, with January being the wettest month (11.8") and August the driest (0.0").