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Weather & Climate in Mount Helena, Australia
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Mount Helena enjoys a temperate climate with an average annual temperature of 64°F (18°C). Winters average 76°F in January while summers reach 53°F in July / relatively mild seasonal variation. The area gets 343 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 22.0 inches (drier than the 38-inch national average). The city sits at an elevation of 925 feet.
Temperature
76°F Jan (24°C)
53°F Jul (12°C)
| Annual Average | 63.7°F |
| 18% above US avg | |
| January Average | 76°F (24°C) |
| July Average | 53°F (12°C) |
| Sunny Days | 343 days/yr |
Geography
| Elevation | 925 ft (282 m) |
| Area | 11.1 sq mi (28.7 km²) |
| Population Density | 277/sq mi |
| Coordinates | -31.8761°N, 116.2103°W |
| Timezone | Australia/Perth |
Precipitation & Snow
Air Quality
Earthquake History
24 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 | 78 km | 7 km |
| Dec 20, 1996 | 61 km N of Toodyay, Australia | M4.5 | 103 km | 10 km |
| Jun 12, 2005 | 102 km NNE of Northam, Australia | M4.3 | 147 km | 2 km |
| Mar 24, 2003 | 36 km NE of York, Australia | M4.0 | 85 km | 5 km |
| Jan 25, 2025 | 59 km ENE of York, Australia | M4.0 | 110 km | 10 km |
| Jan 20, 1993 | 45 km E of Northam, Australia | M3.9 | 93 km | 33 km |
| May 3, 2008 | 84 km NE of Northam, Australia | M3.7 | 135 km | 5 km |
| Mar 15, 1999 | 35 km NE of York, Australia | M3.7 | 83 km | 10 km |
| Jan 5, 1998 | 41 km ENE of Northam, Australia | M3.6 | 91 km | 10 km |
| Apr 23, 1992 | 68 km NNE of Toodyay, Australia | M3.3 | 112 km | 10 km |
| Jan 5, 1994 | 40 km ENE of Beverley, Australia | M3.2 | 107 km | 10 km |
| Jun 2, 2005 | 52 km ENE of Northam, Australia | M3.0 | 103 km | 0 km |
| Mar 25, 2005 | 74 km NE of Northam, Australia | M2.9 | 124 km | 5 km |
| Sep 4, 2004 | Western Australia | M2.8 | 133 km | 2 km |
| Jul 18, 2003 | 42 km N of Toodyay, Australia | M2.8 | 85 km | 0 km |
| May 6, 2005 | 5 km NW of Bullsbrook, Australia | M2.8 | 36 km | 2 km |
| Jun 12, 2002 | 30 km SSE of Beverley, Australia | M2.7 | 99 km | 10 km |
| Apr 23, 2001 | 19 km WNW of Narrogin, Australia | M2.7 | 134 km | 10 km |
| Mar 15, 2005 | 46 km NE of Boddington, Australia | M2.7 | 94 km | 0 km |
| May 12, 2005 | 31 km ENE of Beverley, Australia | M2.6 | 94 km | 5 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 | 277 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 76°F (24°C) | 0.6 in | Warmest |
| February | 74°F (24°C) | 0.7 in | |
| March | 71°F (22°C) | 0.8 in | |
| April | 65°F (18°C) | 1.6 in | |
| May | 58°F (15°C) | 4.1 in | |
| June | 54°F (12°C) | 6.3 in | |
| July | 53°F (12°C) | 6.6 in | Wettest |
| August | 53°F (11°C) | 5.2 in | Coldest |
| September | 55°F (13°C) | 3.6 in | |
| October | 58°F (15°C) | 2.1 in | |
| November | 64°F (18°C) | 1.1 in | |
| December | 70°F (21°C) | 0.4 in | Driest |
Mount Helena has a seasonal temperature swing of 23°F / from 53°F in August to 76°F in January. Total annual precipitation is 33.2 inches, with July being the wettest month (6.6") and December the driest (0.4").