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Weather & Climate in Merriwa, Australia
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Merriwa enjoys a temperate climate with an average annual temperature of 66°F (19°C). Winters average 75°F in January while summers reach 57°F in July / relatively mild seasonal variation. The area gets 349 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 18.6 inches (drier than the 38-inch national average). The city sits at an elevation of 66 feet.
Temperature
75°F Jan (24°C)
57°F Jul (14°C)
| Annual Average | 66.4°F |
| 23% above US avg | |
| January Average | 75°F (24°C) |
| July Average | 57°F (14°C) |
| Sunny Days | 349 days/yr |
Geography
| Elevation | 66 ft (20 m) |
| Area | 0.9 sq mi (2.3 km²) |
| Population Density | 5,974/sq mi |
| Coordinates | -31.6649°N, 115.7127°W |
| Timezone | Australia/Perth |
Precipitation & Snow
Air Quality
Earthquake History
14 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.2.
| Jan 17, 1990 | 30 km E of Northam, Australia | M5.2 | 121 km | 7 km |
| Dec 20, 1996 | 61 km N of Toodyay, Australia | M4.5 | 111 km | 10 km |
| Mar 24, 2003 | 36 km NE of York, Australia | M4.0 | 130 km | 5 km |
| Jan 20, 1993 | 45 km E of Northam, Australia | M3.9 | 137 km | 33 km |
| Mar 15, 1999 | 35 km NE of York, Australia | M3.7 | 128 km | 10 km |
| Jan 5, 1998 | 41 km ENE of Northam, Australia | M3.6 | 132 km | 10 km |
| Apr 23, 1992 | 68 km NNE of Toodyay, Australia | M3.3 | 127 km | 10 km |
| Jun 2, 2005 | 52 km ENE of Northam, Australia | M3.0 | 143 km | 0 km |
| May 6, 2005 | 5 km NW of Bullsbrook, Australia | M2.8 | 24 km | 2 km |
| Jul 18, 2003 | 42 km N of Toodyay, Australia | M2.8 | 96 km | 0 km |
| Mar 15, 2005 | 46 km NE of Boddington, Australia | M2.7 | 143 km | 0 km |
| May 12, 2005 | 31 km ENE of Beverley, Australia | M2.6 | 144 km | 5 km |
| Apr 15, 2005 | 10 km SSW of York, Australia | M2.5 | 100 km | 2 km |
| Aug 11, 2003 | 25 km ENE of Beverley, Australia | M2.5 | 141 km | 0 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
1 hurricane (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 1.
| Year | Name | Category | Max Wind | Closest |
| 2021 | Seroja | Category 1 | 63 mph | 253 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 75°F (24°C) | 0.5 in | |
| February | 76°F (25°C) | 0.7 in | Warmest |
| March | 74°F (23°C) | 0.7 in | |
| April | 67°F (20°C) | 1.5 in | |
| May | 62°F (16°C) | 3.8 in | |
| June | 57°F (14°C) | 5.5 in | |
| July | 57°F (14°C) | 5.9 in | Wettest |
| August | 56°F (13°C) | 4.5 in | Coldest |
| September | 58°F (15°C) | 2.9 in | |
| October | 61°F (16°C) | 1.7 in | |
| November | 67°F (19°C) | 0.9 in | |
| December | 72°F (22°C) | 0.4 in | Driest |
Merriwa has a seasonal temperature swing of 20°F / from 56°F in August to 76°F in February. Total annual precipitation is 28.8 inches, with July being the wettest month (5.9") and December the driest (0.4").