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Weather & Climate in Grand Roy, Grenada
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Grand Roy has a warm climate with an average annual temperature of 78°F (26°C). Winters average 76°F in January while summers reach 79°F in July / relatively mild seasonal variation. The area gets 208 sunny days per year. Annual precipitation totals 70.5 inches (wetter than the 38-inch national average). The city sits at an elevation of 69 feet.
Temperature
76°F Jan (25°C)
79°F Jul (26°C)
| Annual Average | 78.4°F |
| 45% above US avg | |
| January Average | 76°F (25°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 208 days/yr |
Geography
| Elevation | 69 ft (21 m) |
| Area | 42.0 sq mi (108.8 km²) |
| Population Density | 57/sq mi |
| Coordinates | 12.1322°N, 61.7454°W |
| Timezone | America/Grenada |
Precipitation & Snow
Air Quality
Earthquake History
951 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.7.
| Apr 22, 1997 | 18 km WSW of Scarborough, Trinidad and Tobago | M6.7 | 147 km | 5 km |
| Oct 4, 2000 | 66 km NNW of Güiria, Venezuela | M6.2 | 143 km | 110 km |
| Apr 2, 1997 | 33 km NW of Scarborough, Trinidad and Tobago | M6.1 | 119 km | 45 km |
| Oct 12, 2013 | 36 km N of Güiria, Venezuela | M6.0 | 150 km | 63 km |
| Apr 22, 1997 | 29 km SW of Scarborough, Trinidad and Tobago | M5.6 | 150 km | 5 km |
| May 4, 1997 | 31 km WSW of Scarborough, Trinidad and Tobago | M5.5 | 149 km | 5 km |
| Nov 5, 2017 | 67 km SE of Saint David’s, Grenada | M5.5 | 80 km | 47 km |
| Jan 1, 1996 | 61 km NNW of Petit Valley, Trinidad and Tobago | M5.4 | 100 km | 70 km |
| Jun 1, 1994 | 72 km ESE of Grenville, Grenada | M5.4 | 85 km | 73 km |
| Feb 4, 2011 | 84 km NNE of Güiria, Venezuela | M5.2 | 100 km | 149 km |
| Jun 27, 2008 | 64 km N of Güiria, Venezuela | M5.2 | 131 km | 148 km |
| Aug 14, 2010 | 79 km N of Güiria, Venezuela | M5.2 | 118 km | 137 km |
| Jan 29, 2022 | 41 km WSW of Scarborough, Trinidad and Tobago | M5.1 | 148 km | 26 km |
| Apr 25, 1997 | 31 km W of Scarborough, Trinidad and Tobago | M5.0 | 136 km | 5 km |
| Jul 22, 1998 | 88 km ESE of Hillsborough, Grenada | M5.0 | 110 km | 78 km |
| Apr 7, 2020 | 67 km NW of Scarborough, Trinidad and Tobago | M5.0 | 85 km | 20 km |
| Apr 22, 1997 | 48 km NNE of Arima, Trinidad and Tobago | M5.0 | 135 km | 5 km |
| Sep 10, 2015 | 66 km NNW of Güiria, Venezuela | M4.9 | 135 km | 115 km |
| Jan 4, 2019 | 31 km N of Paradise, Trinidad and Tobago | M4.9 | 139 km | 10 km |
| Feb 23, 2007 | 19 km NW of Petit Valley, Trinidad and Tobago | M4.9 | 146 km | 49 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
7 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Beryl | Category 5 | 161 mph | 49 km |
| 2021 | Elsa | Category 1 | 86 mph | 157 km |
| 2010 | Tomas | Category 2 | 98 mph | 149 km |
| 2007 | Dean | Category 3 | 127 mph | 252 km |
| 2005 | Emily | Category 2 | 98 mph | 16 km |
| 2004 | Ivan | Category 4 | 138 mph | 26 km |
| 1980 | Allen | Category 4 | 144 mph | 182 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 1.0 m (3 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1902 | SOUFRIERE VOLCANO | Astronomical | 1.0 m | 1,680 | 147 km |
| 2021 | SOUFRIERE VOLCANO | Astronomical | 0.1 m | — | 147 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
3 volcanoes within 200 km. Closest: St. Catherine (8 km).
| Name | Type | Elevation | Last Eruption | Distance |
| St. Catherine | Stratovolcano | 840 m (2,756 ft) | Unknown | 8 km |
| Kick 'em Jenny | Submarine | -185 m (-607 ft) | 2017 | 22 km |
| Soufriere St. Vincent | Stratovolcano | 1,220 m (4,003 ft) | 1979 | 147 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 76°F (25°C) | 5.0 in | Coldest |
| February | 76°F (25°C) | 3.2 in | |
| March | 77°F (25°C) | 2.3 in | Driest |
| April | 79°F (26°C) | 2.4 in | |
| May | 80°F (26°C) | 3.8 in | |
| June | 79°F (26°C) | 6.7 in | |
| July | 79°F (26°C) | 7.0 in | |
| August | 80°F (26°C) | 7.8 in | |
| September | 80°F (27°C) | 7.4 in | Warmest |
| October | 80°F (26°C) | 8.1 in | |
| November | 78°F (26°C) | 9.3 in | Wettest |
| December | 77°F (25°C) | 7.5 in |
Grand Roy has a seasonal temperature swing of 4°F / from 76°F in January to 80°F in September. Total annual precipitation is 70.5 inches, with November being the wettest month (9.3") and March the driest (2.3").