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Weather & Climate in Derby, Australia
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Derby has a warm climate with an average annual temperature of 82°F (28°C). Winters average 87°F in January while summers reach 73°F in July / relatively mild seasonal variation. The area gets 290 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 25.5 inches (drier than the 38-inch national average). The city sits at an elevation of 43 feet.
Temperature
87°F Jan (30°C)
73°F Jul (23°C)
| Annual Average | 81.9°F |
| 52% above US avg | |
| January Average | 87°F (30°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 290 days/yr |
Geography
| Elevation | 43 ft (13 m) |
| Area | 62.7 sq mi (162.4 km²) |
| Population Density | 66/sq mi |
| Coordinates | -17.3030°N, 123.6286°W |
| Timezone | Australia/Perth |
Precipitation & Snow
Air Quality
Earthquake History
11 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.4.
| May 7, 2011 | 62 km NE of Roebuck, Australia | M4.4 | 93 km | 10 km |
| Sep 1, 1997 | 57 km E of Roebuck, Australia | M4.3 | 108 km | 10 km |
| Mar 18, 2003 | 21 km NE of Derby, Australia | M4.3 | 22 km | 5 km |
| Jan 9, 1991 | 49 km SE of Derby, Australia | M4.3 | 50 km | 10 km |
| Apr 18, 1992 | 39 km W of Derby, Australia | M4.2 | 40 km | 10 km |
| Aug 17, 1990 | 37 km NNE of Roebuck, Australia | M4.0 | 123 km | 10 km |
| Jan 24, 2005 | 56 km NE of Bilingurr, Australia | M3.8 | 113 km | 10 km |
| Sep 9, 2000 | 95 km NNE of Derby, Australia | M3.8 | 96 km | 10 km |
| Mar 16, 2014 | 86 km E of Derby, Australia | M3.8 | 87 km | 10 km |
| Feb 5, 2002 | 52 km NNE of Bilingurr, Australia | M3.5 | 138 km | 10 km |
| Feb 9, 2007 | 57 km S of Derby, Australia | M3.2 | 57 km | 15 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
15 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2026 | Hayley | Category 2 | — | 59 km |
| 2025 | Errol | Category 1 | 58 mph | 257 km |
| 2018 | Marcus | Category 2 | 104 mph | 234 km |
| 2010 | Laurence | Category 4 | 127 mph | 91 km |
| 2006 | Glenda | Category 4 | 127 mph | 243 km |
| 2004 | Fay | Category 2 | 92 mph | 210 km |
| 2002 | Chris | Category 2 | 104 mph | 269 km |
| 2001 | Sam | Category 3 | 127 mph | 233 km |
| 2001 | Alistair | Category 1 | 69 mph | 226 km |
| 2000 | Rosita | Category 4 | 138 mph | 173 km |
| 1999 | Thelma | Category 4 | 86 mph | 184 km |
| 1997 | Phil | Category 1 | 69 mph | 279 km |
| 1996 | Kirsty | Category 2 | 92 mph | 250 km |
| 1995 | Chloe | Category 4 | 138 mph | 93 km |
| 1980 | Enid | Category 1 | 98 mph | 240 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 87°F (30°C) | 8.1 in | Wettest |
| February | 86°F (30°C) | 8.1 in | |
| March | 86°F (30°C) | 4.5 in | |
| April | 84°F (29°C) | 0.9 in | |
| May | 79°F (26°C) | 0.8 in | |
| June | 74°F (23°C) | 0.3 in | |
| July | 73°F (23°C) | 0.1 in | Coldest |
| August | 75°F (24°C) | 0.0 in | Driest |
| September | 80°F (27°C) | 0.0 in | |
| October | 85°F (29°C) | 0.1 in | |
| November | 87°F (31°C) | 0.4 in | |
| December | 88°F (31°C) | 2.2 in | Warmest |
Derby has a seasonal temperature swing of 15°F / from 73°F in July to 88°F in December. Total annual precipitation is 25.5 inches, with January being the wettest month (8.1") and August the driest (0.0").