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Weather & Climate in Grästorp, Sweden
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Grästorp has a cool climate with an average annual temperature of 44°F (7°C). Winters average 29°F in January while summers reach 61°F in July. The area gets 285 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 28.2 inches (drier than the 38-inch national average). The area receives 7.9 inches of snow annually. The city sits at an elevation of 210 feet.
Temperature
29°F Jan (-2°C)
61°F Jul (16°C)
| Annual Average | 43.8°F |
| 19% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 61°F (16°C) |
| Sunny Days | 285 days/yr |
Geography
| Elevation | 210 ft (64 m) |
| Area | 1.0 sq mi (2.7 km²) |
| Population Density | 2,860/sq mi |
| Coordinates | 58.3322°N, 12.6812°W |
| Timezone | Europe/Stockholm |
Precipitation & Snow
Air Quality
Earthquake History
13 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.8.
| Feb 19, 1992 | 5 km SE of Fredrikstad, Norway | M3.8 | 135 km | 10 km |
| May 24, 1990 | 10 km W of Västra Hagen, Sweden | M3.6 | 113 km | 5 km |
| Nov 29, 2000 | 9 km E of Strömstad, Sweden | M3.4 | 103 km | 10 km |
| Jul 29, 2015 | 4 km NE of Nolvik, Sweden | M3.4 | 75 km | 13 km |
| Feb 1, 1995 | 11 km SSW of Töreboda, Sweden | M3.4 | 84 km | 10 km |
| May 10, 1994 | 24 km SW of Ellös, Sweden | M3.2 | 96 km | 35 km |
| Sep 28, 1993 | 44 km WSW of Grebbestad, Sweden | M2.9 | 129 km | 10 km |
| Apr 22, 1993 | 13 km W of Skärhamn, Sweden | M2.8 | 88 km | 10 km |
| Jun 23, 2018 | 2 km SW of Götene, Sweden | M2.8 | 50 km | 10 km |
| Aug 29, 1991 | 43 km W of Smögen, Sweden | M2.6 | 128 km | 10 km |
| Jun 8, 2005 | 3 km WNW of Skagen, Denmark | M2.6 | 144 km | 10 km |
| May 15, 1994 | 13 km NNW of Ryd, Sweden | M2.6 | 145 km | 5 km |
| May 23, 1990 | 50 km WNW of Smögen, Sweden | M2.5 | 132 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 5.0 m (16 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1969 | NORSALV RIVER | Meteorological | 5.0 m | - | 128 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 2.1 in | |
| February | 28°F (-2°C) | 1.5 in | Coldest, Driest |
| March | 34°F (1°C) | 1.8 in | |
| April | 41°F (5°C) | 1.7 in | |
| May | 51°F (11°C) | 1.8 in | |
| June | 58°F (14°C) | 2.6 in | |
| July | 61°F (16°C) | 2.6 in | Warmest |
| August | 60°F (15°C) | 2.7 in | |
| September | 52°F (11°C) | 3.1 in | Wettest |
| October | 45°F (7°C) | 2.9 in | |
| November | 37°F (3°C) | 2.9 in | |
| December | 32°F (-0°C) | 2.4 in |
Grästorp has a seasonal temperature swing of 33°F / from 28°F in February to 61°F in July. Total annual precipitation is 28.2 inches, with September being the wettest month (3.1") and February the driest (1.5").