All Countries
Weather & Climate in Merimasku, Finland
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Merimasku has a cool climate with an average annual temperature of 42°F (5°C). Winters average 24°F in January while summers reach 62°F in July. 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 area receives 10.2 inches of snow annually. The city sits at an elevation of 43 feet.
Temperature
24°F Jan (-4°C)
62°F Jul (17°C)
| Annual Average | 41.6°F |
| 23% below US avg | |
| January Average | 24°F (-4°C) |
| July Average | 62°F (17°C) |
| Sunny Days | 290 days/yr |
Geography
| Elevation | 43 ft (13 m) |
| Area | 19.7 sq mi (51.1 km²) |
| Population Density | 78/sq mi |
| Coordinates | 60.4833°N, 21.8667°W |
| Timezone | Europe/Helsinki |
Precipitation & Snow
Air Quality
Earthquake History
8 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M2.8.
| Mar 9, 2005 | 56 km ESE of Kökar, Aland Islands | M2.8 | 88 km | 0 km |
| May 12, 2005 | 29 km SSE of Hanko, Finland | M2.7 | 122 km | 0 km |
| May 12, 2005 | 28 km SSE of Hanko, Finland | M2.7 | 122 km | 0 km |
| May 12, 2005 | 28 km SE of Hanko, Finland | M2.7 | 122 km | 0 km |
| May 24, 1995 | 8 km ENE of Nagu, Finland | M2.7 | 31 km | 10 km |
| Mar 9, 2005 | Baltic Sea | M2.6 | 91 km | 0 km |
| Mar 9, 2005 | 30 km SSW of Dragsfjärd, Finland | M2.6 | 79 km | 0 km |
| Mar 9, 2005 | 49 km SSW of Dragsfjärd, Finland | M2.5 | 92 km | 0 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-4°C) | 1.9 in | |
| February | 23°F (-5°C) | 1.4 in | Coldest |
| March | 29°F (-2°C) | 1.6 in | |
| April | 37°F (3°C) | 1.5 in | |
| May | 48°F (9°C) | 1.3 in | Driest |
| June | 57°F (14°C) | 1.7 in | |
| July | 62°F (17°C) | 2.7 in | Warmest |
| August | 60°F (16°C) | 2.8 in | |
| September | 52°F (11°C) | 2.6 in | |
| October | 43°F (6°C) | 2.8 in | |
| November | 35°F (2°C) | 2.9 in | Wettest |
| December | 29°F (-2°C) | 2.4 in |
Merimasku has a seasonal temperature swing of 39°F / from 23°F in February to 62°F in July. Total annual precipitation is 25.5 inches, with November being the wettest month (2.9") and May the driest (1.3").