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Weather & Climate in Marmora, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Marmora has a cool climate with an average annual temperature of 43°F (6°C). Winters average 16°F in January while summers reach 68°F in July. The area gets 270 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 36.5 inches. The area receives 10.7 inches of snow annually. The city sits at an elevation of 630 feet.
Temperature
16°F Jan (-9°C)
68°F Jul (20°C)
| Annual Average | 43.3°F |
| 20% below US avg | |
| January Average | 16°F (-9°C) |
| July Average | 68°F (20°C) |
| Sunny Days | 270 days/yr |
Geography
| Elevation | 630 ft (192 m) |
| Area | 109.1 sq mi (282.5 km²) |
| Population Density | 14/sq mi |
| Coordinates | 44.4834°N, 77.6828°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
19 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.8.
| Nov 26, 1999 | 14 km ESE of Centennial Scarborough, Canada | M3.8 | 136 km | 13 km |
| Apr 23, 2023 | New York | M3.6 | 149 km | 9 km |
| Oct 20, 2013 | 34 km SSW of Petawawa, Canada | M3.6 | 127 km | 18 km |
| Dec 25, 1998 | 23 km SE of Cobourg, Canada | M3.6 | 75 km | 18 km |
| Jun 29, 2024 | 14 km W of Ellisburg, New York | M3.3 | 138 km | 5 km |
| May 24, 2000 | 4 km ENE of Centennial Scarborough, Canada | M3.1 | 136 km | 18 km |
| Aug 4, 2004 | 30 km SSW of Cobourg, Canada | M3.0 | 99 km | 5 km |
| May 8, 2018 | 14 km SSE of Ajax, Canada | M3.0 | 131 km | 5 km |
| Nov 7, 2002 | 13 km SSW of Belleville, Canada | M3.0 | 52 km | 18 km |
| Jul 19, 2007 | 27 km S of Cobourg, Canada | M3.0 | 95 km | 5 km |
| Jul 27, 2014 | 13 km SW of Pembroke, Canada | M2.9 | 144 km | 18 km |
| Dec 21, 2009 | 10 km NNE of Olcott, New York | M2.7 | 142 km | 8 km |
| Aug 11, 2007 | 4 km N of Kingston, Canada | M2.6 | 99 km | 4 km |
| Mar 29, 2020 | 11 km N of Lyndonville, New York | M2.6 | 130 km | 5 km |
| Apr 14, 2023 | 1 km W of Adams Center, New York | M2.6 | 149 km | 6 km |
| Apr 11, 2007 | 6 km NNE of Sodus Point, New York | M2.6 | 141 km | 7 km |
| Jul 11, 2017 | 11 km NNW of Barker, New York | M2.5 | 138 km | 5 km |
| May 10, 2022 | southern Ontario, Canada | M2.5 | 149 km | 11 km |
| Feb 13, 2014 | 34 km N of Lyndonville, New York | M2.5 | 110 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 16°F (-9°C) | 3.2 in | Coldest |
| February | 18°F (-8°C) | 2.1 in | Driest |
| March | 28°F (-2°C) | 2.5 in | |
| April | 42°F (5°C) | 2.8 in | |
| May | 54°F (12°C) | 3.2 in | |
| June | 63°F (17°C) | 3.3 in | |
| July | 68°F (20°C) | 2.7 in | Warmest |
| August | 66°F (19°C) | 3.0 in | |
| September | 58°F (15°C) | 3.6 in | |
| October | 47°F (8°C) | 3.3 in | |
| November | 36°F (2°C) | 3.8 in | Wettest |
| December | 23°F (-5°C) | 2.9 in |
Marmora has a seasonal temperature swing of 52°F / from 16°F in January to 68°F in July. Total annual precipitation is 36.5 inches, with November being the wettest month (3.8") and February the driest (2.1").