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Weather & Climate in Shannon, New Zealand
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Shannon enjoys a temperate climate with an average annual temperature of 56°F (14°C). Winters average 65°F in January while summers reach 49°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 70.7 inches (wetter than the 38-inch national average). The city sits at an elevation of 82 feet.
Temperature
65°F Jan (18°C)
49°F Jul (10°C)
| Annual Average | 56.3°F |
| 4% above US avg | |
| January Average | 65°F (18°C) |
| July Average | 49°F (10°C) |
| Sunny Days | 290 days/yr |
Geography
| Elevation | 82 ft (25 m) |
| Area | 443.0 sq mi (1,147.4 km²) |
| Population Density | 4/sq mi |
| Coordinates | -40.5483°N, 175.4202°W |
| Timezone | Pacific/Auckland |
Precipitation & Snow
Air Quality
Earthquake History
1,262 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.4.
| May 13, 1990 | 39 km E of Palmerston North, New Zealand | M6.4 | 61 km | 21 km |
| Feb 19, 1990 | 41 km E of Palmerston North, New Zealand | M6.3 | 62 km | 24 km |
| Jan 20, 2014 | 35 km NNE of Masterton, New Zealand | M6.1 | 36 km | 28 km |
| Jul 20, 2013 | 38 km ESE of Blenheim, New Zealand | M5.9 | 149 km | 14 km |
| Sep 19, 1995 | 15 km SW of Hawera, New Zealand | M5.8 | 142 km | 217 km |
| Mar 22, 1995 | 27 km N of Picton, New Zealand | M5.8 | 130 km | 87 km |
| Feb 15, 2023 | 55 km NW of Raumati Beach, New Zealand | M5.7 | 75 km | 78 km |
| Apr 11, 1993 | 28 km WSW of Hastings, New Zealand | M5.7 | 131 km | 33 km |
| May 24, 2020 | 29 km WNW of Foxton, New Zealand | M5.6 | 44 km | 46 km |
| Sep 8, 1991 | 29 km WSW of Bulls, New Zealand | M5.6 | 46 km | 88 km |
| Oct 4, 1990 | 25 km SE of Brooklyn, New Zealand | M5.6 | 111 km | 37 km |
| Oct 15, 2001 | 21 km WSW of Hastings, New Zealand | M5.5 | 138 km | 48 km |
| Mar 2, 1992 | 63 km N of Castlepoint, New Zealand | M5.5 | 83 km | 28 km |
| Oct 6, 1990 | 24 km SW of Waipawa, New Zealand | M5.5 | 116 km | 39 km |
| Jul 18, 2013 | 38 km E of Blenheim, New Zealand | M5.5 | 140 km | 18 km |
| Sep 24, 2001 | 67 km NNE of Castlepoint, New Zealand | M5.4 | 96 km | 33 km |
| Apr 25, 2023 | 37 km E of Dannevirke, New Zealand | M5.4 | 100 km | 22 km |
| Jun 9, 1991 | 38 km SSW of Patea, New Zealand | M5.4 | 100 km | 109 km |
| Jan 20, 2005 | 16 km SE of Upper Hutt, New Zealand | M5.3 | 77 km | 39 km |
| Feb 18, 2003 | 63 km NNE of Castlepoint, New Zealand | M5.3 | 103 km | 22 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 15.0 m (49 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1931 | N. NEW ZEALAND | Eruption + Earthquake | 15.0 m | 261 | 101 km |
| 1855 | NORTHERN ISLAND | Earthquake | 11.0 m | — | 86 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
4 volcanoes within 200 km. Closest: Ruapehu (142 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Ruapehu | Stratovolcano | 2,797 m (9,177 ft) | 2007 | 142 km |
| Tongariro | Stratovolcano(es) | 1,978 m (6,490 ft) | 2012 | 156 km |
| Taranaki | Stratovolcano | 2,518 m (8,261 ft) | 1800 | 180 km |
| Taupo | Caldera | 760 m (2,493 ft) | 260 | 199 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 65°F (18°C) | 3.9 in | Warmest |
| February | 61°F (16°C) | 3.4 in | Driest |
| March | 60°F (15°C) | 4.3 in | |
| April | 55°F (13°C) | 3.7 in | |
| May | 50°F (10°C) | 5.3 in | |
| June | 46°F (8°C) | 5.1 in | Coldest |
| July | 49°F (10°C) | 5.4 in | |
| August | 46°F (8°C) | 4.9 in | |
| September | 49°F (10°C) | 6.3 in | Wettest |
| October | 52°F (11°C) | 4.9 in | |
| November | 55°F (13°C) | 5.0 in | |
| December | 59°F (15°C) | 5.1 in |
Shannon has a seasonal temperature swing of 19°F / from 46°F in June to 65°F in January. Total annual precipitation is 57.3 inches, with September being the wettest month (6.3") and February the driest (3.4").