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Weather & Climate in Portarlington, Australia
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Portarlington enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 67°F in January while summers reach 52°F in July / relatively mild seasonal variation. The area gets 302 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 25.9 inches (drier than the 38-inch national average). The city sits at an elevation of 89 feet.
Temperature
67°F Jan (20°C)
52°F Jul (11°C)
| Annual Average | 58.8°F |
| 9% above US avg | |
| January Average | 67°F (20°C) |
| July Average | 52°F (11°C) |
| Sunny Days | 302 days/yr |
Geography
| Elevation | 89 ft (27 m) |
| Area | 1.6 sq mi (4.1 km²) |
| Population Density | 2,209/sq mi |
| Coordinates | -38.1154°N, 144.6556°W |
| Timezone | Australia/Melbourne |
Precipitation & Snow
Air Quality
Earthquake History
36 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.2.
| Jun 19, 2012 | 11 km NNE of Mirboo North, Australia | M5.2 | 137 km | 10 km |
| Aug 29, 2000 | 5 km ENE of Mirboo North, Australia | M5.0 | 140 km | 12 km |
| Sep 25, 1996 | 32 km SE of Alexandra, Australia | M4.7 | 145 km | 10 km |
| Jul 20, 2012 | 8 km S of Trafalgar, Australia | M4.6 | 133 km | 13 km |
| Mar 6, 2009 | 1 km SE of Korumburra, Australia | M4.5 | 110 km | 14 km |
| Jul 5, 2011 | 2 km NNE of Korumburra, Australia | M4.4 | 109 km | 2 km |
| Sep 25, 1996 | 26 km ENE of Neerim South, Australia | M4.3 | 138 km | 10 km |
| Feb 8, 2024 | 3 km E of Leongatha, Australia | M4.3 | 123 km | 10 km |
| Mar 18, 2009 | 0 km N of Korumburra, Australia | M4.3 | 108 km | 15 km |
| Sep 24, 2002 | 10 km SSE of Leongatha, Australia | M4.0 | 127 km | 10 km |
| May 28, 2023 | 5 km W of Mickleham, Australia | M3.8 | 66 km | 9 km |
| Jul 5, 2011 | 2 km NW of Korumburra, Australia | M3.7 | 106 km | 6 km |
| Aug 21, 2001 | 2 km N of Kallista, Australia | M3.6 | 69 km | 33 km |
| Nov 8, 1992 | 20 km NNE of Colac, Australia | M3.6 | 83 km | 10 km |
| Sep 24, 2002 | 8 km ESE of Leongatha, Australia | M3.5 | 129 km | 10 km |
| May 19, 1990 | 37 km N of Yallourn North, Australia | M3.5 | 150 km | 5 km |
| Mar 8, 2007 | 13 km N of Bunyip, Australia | M3.5 | 96 km | 14 km |
| Jul 4, 2001 | 7 km E of Mirboo North, Australia | M3.4 | 142 km | 10 km |
| Jul 5, 2011 | 6 km ENE of Korumburra, Australia | M3.3 | 112 km | 0 km |
| Jun 22, 2000 | 10 km NW of Heathcote, Australia | M3.3 | 139 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Nearby Volcanoes
1 volcano within 200 km. Closest: Newer Volcanics Province (193 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Newer Volcanics Province | Shield(s) | 1,011 m (3,317 ft) | -2900 | 193 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 67°F (20°C) | 1.8 in | Warmest |
| February | 67°F (20°C) | 1.5 in | |
| March | 65°F (18°C) | 1.5 in | Driest |
| April | 60°F (15°C) | 1.7 in | |
| May | 55°F (13°C) | 2.0 in | |
| June | 50°F (10°C) | 1.8 in | Coldest |
| July | 52°F (11°C) | 1.8 in | |
| August | 50°F (10°C) | 2.1 in | |
| September | 53°F (12°C) | 2.2 in | |
| October | 56°F (14°C) | 2.5 in | Wettest |
| November | 60°F (15°C) | 2.0 in | |
| December | 63°F (17°C) | 2.0 in |
Portarlington has a seasonal temperature swing of 17°F / from 50°F in June to 67°F in January. Total annual precipitation is 22.9 inches, with October being the wettest month (2.5") and March the driest (1.5").