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Weather & Climate in Williamtown, Australia
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Williamtown enjoys a temperate climate with an average annual temperature of 67°F (19°C). Winters average 72°F in January while summers reach 61°F in July / relatively mild seasonal variation. The area gets 347 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 27.5 inches (drier than the 38-inch national average). The city sits at an elevation of 20 feet.
Temperature
72°F Jan (22°C)
61°F Jul (16°C)
| Annual Average | 66.6°F |
| 23% above US avg | |
| January Average | 72°F (22°C) |
| July Average | 61°F (16°C) |
| Sunny Days | 347 days/yr |
Geography
| Elevation | 20 ft (6 m) |
| Area | 478.7 sq mi (1,239.9 km²) |
| Population Density | 2/sq mi |
| Coordinates | -32.8064°N, 151.8436°W |
| Timezone | Australia/Sydney |
Precipitation & Snow
Air Quality
Earthquake History
15 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.3.
| Aug 6, 1994 | 9 km WSW of Ellalong, Australia | M5.3 | 60 km | 10 km |
| Apr 22, 2025 | 18 km SW of Singleton, Australia | M5.1 | 75 km | 10 km |
| Aug 23, 2024 | 7 km ENE of Denman, Australia | M4.8 | 113 km | 10 km |
| Aug 24, 2024 | 8 km NE of Denman, Australia | M4.5 | 115 km | 11 km |
| Sep 6, 2024 | New South Wales, Australia | M4.4 | 118 km | 9 km |
| May 2, 2020 | 11 km ENE of Denman, Australia | M4.0 | 109 km | 16 km |
| Apr 19, 2017 | 62 km ESE of Forster, Australia | M3.9 | 135 km | 10 km |
| Mar 1, 2025 | 12 km N of Denman, Australia | M3.3 | 125 km | 10 km |
| Mar 11, 2010 | 8 km NE of Hawks Nest, Australia | M3.3 | 43 km | 0 km |
| Sep 10, 2012 | 33 km ESE of Blue Bay, Australia | M3.2 | 72 km | 2 km |
| Feb 23, 1990 | 49 km S of Denman, Australia | M3.0 | 108 km | 10 km |
| Jul 2, 2006 | 9 km SSW of Muswellbrook, Australia | M2.8 | 105 km | 12 km |
| May 15, 2004 | 23 km ENE of Dungog, Australia | M2.8 | 56 km | 12 km |
| Jan 14, 2025 | 13 km ESE of Denman, Australia | M2.7 | 105 km | 10 km |
| Aug 26, 2024 | 12 km SSW of Muswellbrook, Australia | M2.7 | 105 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 72°F (22°C) | 4.4 in | |
| February | 73°F (23°C) | 4.4 in | Warmest |
| March | 70°F (21°C) | 5.4 in | Wettest |
| April | 66°F (19°C) | 4.5 in | |
| May | 60°F (16°C) | 4.7 in | |
| June | 55°F (13°C) | 5.1 in | Coldest |
| July | 61°F (16°C) | 3.0 in | |
| August | 56°F (13°C) | 2.4 in | Driest |
| September | 60°F (15°C) | 2.4 in | |
| October | 64°F (18°C) | 3.2 in | |
| November | 67°F (20°C) | 3.5 in | |
| December | 71°F (22°C) | 3.2 in |
Williamtown has a seasonal temperature swing of 18°F / from 55°F in June to 73°F in February. Total annual precipitation is 46.1 inches, with March being the wettest month (5.4") and August the driest (2.4").