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Weather & Climate in Riverton, New Zealand
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Riverton experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 58°F in January while summers reach 43°F in July / relatively mild seasonal variation. The area gets 262 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 40.6 inches. The city sits at an elevation of 23 feet.
Temperature
58°F Jan (14°C)
43°F Jul (6°C)
| Annual Average | 50.9°F |
| 6% below US avg | |
| January Average | 58°F (14°C) |
| July Average | 43°F (6°C) |
| Sunny Days | 262 days/yr |
Geography
| Elevation | 23 ft (7 m) |
| Area | 189.6 sq mi (491.0 km²) |
| Population Density | 9/sq mi |
| Coordinates | -46.3500°N, 168.0167°W |
| Timezone | Pacific/Auckland |
Precipitation & Snow
Air Quality
Earthquake History
342 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.8.
| Jul 15, 2009 | 97 km WSW of Te Anau, New Zealand | M7.8 | 130 km | 12 km |
| Aug 10, 1993 | 63 km WNW of Te Anau, New Zealand | M7.0 | 146 km | 28 km |
| Aug 21, 2003 | 53 km W of Te Anau, New Zealand | M5.9 | 137 km | 33 km |
| Jul 16, 2009 | 146 km W of Riverton, New Zealand | M5.7 | 146 km | 30 km |
| Sep 30, 2003 | 53 km W of Te Anau, New Zealand | M5.6 | 122 km | 10 km |
| Aug 26, 2003 | 71 km W of Te Anau, New Zealand | M5.5 | 139 km | 44 km |
| Sep 4, 2003 | 53 km WNW of Te Anau, New Zealand | M5.5 | 147 km | 33 km |
| Aug 21, 2003 | 63 km WNW of Te Anau, New Zealand | M5.3 | 147 km | 23 km |
| Jul 15, 2009 | 105 km WSW of Te Anau, New Zealand | M5.3 | 137 km | 5 km |
| Aug 25, 2009 | 145 km W of Riverton, New Zealand | M5.2 | 145 km | 10 km |
| Jul 16, 2009 | 144 km W of Riverton, New Zealand | M5.2 | 144 km | 5 km |
| Feb 25, 2010 | 139 km WSW of Te Anau, New Zealand | M5.1 | 144 km | 12 km |
| Aug 21, 2003 | 25 km NNW of Te Anau, New Zealand | M5.1 | 131 km | 12 km |
| Aug 23, 2003 | 64 km WNW of Te Anau, New Zealand | M5.1 | 148 km | 33 km |
| Aug 21, 2003 | 72 km W of Te Anau, New Zealand | M5.1 | 144 km | 23 km |
| Jul 12, 2008 | 85 km WSW of Te Anau, New Zealand | M5.1 | 112 km | 101 km |
| Feb 28, 2010 | 48 km WSW of Te Anau, New Zealand | M5.1 | 106 km | 33 km |
| Jul 18, 2009 | 85 km W of Te Anau, New Zealand | M5.1 | 137 km | 8 km |
| Aug 21, 2003 | 64 km W of Te Anau, New Zealand | M5.1 | 140 km | 26 km |
| Apr 25, 2000 | 35 km WNW of Te Anau, New Zealand | M5.0 | 125 km | 91 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
4 tsunamis recorded within 500 km. Highest wave on record: 0.5 m (2 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2009 | OFF WEST COAST OF SOUTH ISLAND | Earthquake | 0.5 m | — | 130 km |
| 1987 | DEEP COVE | Meteorological | — | — | 120 km |
| 1839 | WAIKAWA, SOUTHLAND | Unknown | — | — | 90 km |
| 1826 | DUSKY SOUND | Earthquake | — | — | 134 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 58°F (14°C) | 4.1 in | Warmest |
| February | 58°F (14°C) | 2.9 in | |
| March | 56°F (13°C) | 3.7 in | |
| April | 52°F (11°C) | 3.6 in | |
| May | 48°F (9°C) | 4.3 in | Wettest |
| June | 44°F (6°C) | 4.0 in | |
| July | 43°F (6°C) | 2.9 in | Coldest |
| August | 45°F (7°C) | 2.6 in | |
| September | 48°F (9°C) | 3.1 in | |
| October | 51°F (11°C) | 3.5 in | |
| November | 53°F (12°C) | 2.5 in | Driest |
| December | 56°F (13°C) | 3.5 in |
Riverton has a seasonal temperature swing of 15°F / from 43°F in July to 58°F in January. Total annual precipitation is 40.6 inches, with May being the wettest month (4.3") and November the driest (2.5").