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Weather & Climate in Boulder, Australia
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Boulder enjoys a temperate climate with an average annual temperature of 67°F (19°C). Winters average 77°F in January while summers reach 51°F in July / relatively mild seasonal variation. The area gets 345 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 8.2 inches (drier than the 38-inch national average). The city sits at an elevation of 1,188 feet.
Temperature
77°F Jan (25°C)
51°F Jul (11°C)
| Annual Average | 66.5°F |
| 23% above US avg | |
| January Average | 77°F (25°C) |
| July Average | 51°F (11°C) |
| Sunny Days | 345 days/yr |
Geography
| Elevation | 1,188 ft (362 m) |
| Area | 1.7 sq mi (4.3 km²) |
| Population Density | 2,934/sq mi |
| Coordinates | -30.7820°N, 121.4912°W |
| Timezone | Australia/Perth |
Precipitation & Snow
Air Quality
Earthquake History
12 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.2.
| Apr 20, 2010 | 5 km WSW of Somerville, Australia | M5.2 | 8 km | 0 km |
| Mar 9, 1991 | 19 km NE of Hannans, Australia | M4.8 | 24 km | 10 km |
| Feb 26, 2014 | 26 km W of Hannans, Australia | M4.5 | 31 km | 0 km |
| Oct 14, 1998 | 16 km WSW of Somerville, Australia | M4.2 | 19 km | 10 km |
| Aug 2, 2002 | 8 km W of Somerville, Australia | M3.8 | 12 km | 10 km |
| Jun 27, 1998 | 11 km NW of Stoneville, Australia | M3.8 | 18 km | 10 km |
| Mar 22, 1998 | 68 km ESE of Kambalda East, Australia | M3.8 | 110 km | 10 km |
| May 31, 2004 | 15 km SSE of Kambalda East, Australia | M3.7 | 66 km | 0 km |
| Mar 13, 1998 | 79 km ESE of Kambalda East, Australia | M3.3 | 118 km | 10 km |
| Jul 24, 2002 | 52 km NNW of Hannans, Australia | M3.2 | 61 km | 10 km |
| Jul 4, 2006 | 3 km E of Boulder, Australia | M3.2 | 3 km | 7 km |
| Jan 31, 2005 | 4 km S of Somerville, Australia | M2.6 | 5 km | 0 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 77°F (25°C) | 0.8 in | |
| February | 78°F (25°C) | 1.0 in | Warmest |
| March | 74°F (23°C) | 1.1 in | |
| April | 67°F (19°C) | 0.9 in | |
| May | 59°F (15°C) | 1.2 in | Wettest |
| June | 53°F (12°C) | 1.2 in | |
| July | 51°F (11°C) | 1.0 in | Coldest |
| August | 54°F (12°C) | 0.9 in | |
| September | 60°F (15°C) | 0.6 in | Driest |
| October | 65°F (19°C) | 0.6 in | |
| November | 71°F (22°C) | 0.8 in | |
| December | 77°F (25°C) | 0.8 in |
Boulder has a seasonal temperature swing of 26°F / from 51°F in July to 78°F in February. Total annual precipitation is 11.0 inches, with May being the wettest month (1.2") and September the driest (0.6").