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Weather & Climate in Sem, Norway
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Sem has a cool climate with an average annual temperature of 44°F (7°C). Winters average 28°F in January while summers reach 63°F in July. The area gets 272 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 35.5 inches. The area receives 9.7 inches of snow annually. The city sits at an elevation of 69 feet.
Temperature
28°F Jan (-2°C)
63°F Jul (17°C)
| Annual Average | 44.4°F |
| 18% below US avg | |
| January Average | 28°F (-2°C) |
| July Average | 63°F (17°C) |
| Sunny Days | 272 days/yr |
Geography
| Elevation | 69 ft (21 m) |
| Area | 0.8 sq mi (1.9 km²) |
| Population Density | 2,436/sq mi |
| Coordinates | 59.2823°N, 10.3300°W |
| Timezone | Europe/Oslo |
Precipitation & Snow
Air Quality
Earthquake History
18 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 | 40 km | 10 km |
| Nov 19, 1994 | 0 km WNW of Jessheim, Norway | M3.5 | 107 km | 10 km |
| Nov 12, 1993 | 2 km SE of Åmotfors, Sweden | M3.4 | 127 km | 10 km |
| Nov 29, 2000 | 9 km E of Strömstad, Sweden | M3.4 | 69 km | 10 km |
| May 10, 1994 | 24 km SW of Ellös, Sweden | M3.2 | 145 km | 35 km |
| Nov 27, 1993 | 4 km SW of Sand, Norway | M3.1 | 137 km | 10 km |
| Sep 28, 1993 | 44 km WSW of Grebbestad, Sweden | M2.9 | 79 km | 10 km |
| May 25, 2008 | 4 km WSW of Åneby, Norway | M2.9 | 93 km | 15 km |
| Aug 15, 1991 | 7 km ESE of Stavern, Norway | M2.7 | 35 km | 10 km |
| Aug 22, 1994 | 21 km S of Reinsvoll, Norway | M2.7 | 135 km | 10 km |
| Aug 1, 1994 | 30 km N of Noresund, Norway | M2.7 | 136 km | 5 km |
| Nov 19, 1994 | 7 km NW of Jessheim, Norway | M2.7 | 109 km | 10 km |
| Nov 21, 1994 | 6 km NNW of Jessheim, Norway | M2.7 | 111 km | 10 km |
| Dec 12, 1994 | 8 km S of Rotnes, Norway | M2.6 | 83 km | 5 km |
| Aug 29, 1991 | 43 km W of Smögen, Sweden | M2.6 | 98 km | 10 km |
| Feb 1, 1991 | 5 km SSE of Melsomvik, Norway | M2.6 | 12 km | 10 km |
| Jan 29, 2005 | 7 km NNE of Hvittingfoss, Norway | M2.6 | 32 km | 15 km |
| May 23, 1990 | 50 km WNW of Smögen, Sweden | M2.5 | 82 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: 6.0 m (20 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1966 | EASTERN NORWAY | Meteorological | 6.0 m | - | 39 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 28°F (-2°C) | 2.7 in | Coldest |
| February | 28°F (-2°C) | 1.8 in | Driest |
| March | 34°F (1°C) | 2.5 in | |
| April | 42°F (6°C) | 1.9 in | |
| May | 53°F (12°C) | 2.2 in | |
| June | 60°F (15°C) | 2.5 in | |
| July | 63°F (17°C) | 3.0 in | Warmest |
| August | 61°F (16°C) | 3.4 in | |
| September | 53°F (12°C) | 4.1 in | |
| October | 45°F (7°C) | 4.6 in | Wettest |
| November | 36°F (2°C) | 4.2 in | |
| December | 30°F (-1°C) | 2.8 in |
Sem has a seasonal temperature swing of 35°F / from 28°F in January to 63°F in July. Total annual precipitation is 35.5 inches, with October being the wettest month (4.6") and February the driest (1.8").