Grignasco, Italy

Full City Profile

1.9 /5.0

D Poor

3,967 Population 366/sq mi density

1,056 ft Elevation 322 meters

56°F Avg Temperature 13°C

Overall

1.9 / 5.0

Below average overall score based on economy, affordability, safety and education

Economy

1.9 / 5.0

$23,921 median income, 11.1% unemployment

Grignasco enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 38°F in January while summers reach 74°F in July. The area gets 291 sunny days per year. Annual precipitation totals 53.5 inches. The area receives 2.9 inches of snow annually.

Temperature

38°F Jan (4°C) 74°F Jul (23°C)

Annual Average	56.1°F
	4% above US avg
January Average	38°F (4°C)
July Average	74°F (23°C)
Sunny Days	291 days/yr

Geography

Elevation	1,056 ft (322 m)
Area	10.9 sq mi (28.1 km²)
Population Density	366/sq mi
Coordinates	45.6798°N, 8.3444°W
Timezone	Europe/Rome

Precipitation & Snow

Annual Rainfall 53.5"

41% above US avg

Snowfall 2.9"

Wettest Month (May) 5.12"

Driest Month (Dec) 2.01"

Air Quality

Earthquake History

1,217 earthquakes (M2.5+) within 150 km since 1990. Strongest: M5.0. Most recent: M4.1 on Jul 21, 2025.

Apr 11, 2003	1 km SSW of Carezzano Maggiore, Italy	M5.0	108 km
Oct 29, 1995	0 km WNW of Adro, Italy	M4.9	126 km
Apr 18, 2005	2 km WSW of Marsaglia, Italy	M4.9	134 km
Aug 21, 2000	1 km WNW of Oviglio, Italy	M4.9	91 km
Jul 18, 2001	3 km S of Masio, Italy	M4.7	94 km
Jan 20, 1994	1 km NE of Melle, Italy	M4.6	147 km
Oct 3, 2012	1 km WSW of Lugagnano Val d'Arda, Italy	M4.5	150 km
Oct 3, 2012	2 km N of Melle, Italy	M4.5	146 km
Apr 19, 2009	1 km ENE of Bandito, Italy	M4.5	113 km
Feb 17, 1992	4 km NNE of Scharans, Switzerland	M4.5	148 km
Apr 16, 2020	2 km SE of Marsaglia, Italy	M4.5	137 km
Aug 28, 1994	6 km SSW of Muotathal, Switzerland	M4.5	141 km
Jun 14, 1993	3 km S of Vogogna, Italy	M4.4	34 km
Nov 21, 1995	1 km SW of Collegno, Italy	M4.4	92 km
Jul 25, 2011	5 km NW of Cantalupa, Italy	M4.4	114 km
Feb 11, 1990	northern Italy	M4.3	94 km
Jan 20, 1994	1 km SW of Melle, Italy	M4.3	149 km
Apr 29, 2003	2 km SSW of Varen, Switzerland	M4.3	90 km
Mar 31, 1996	7 km NNW of Bionaz, Italy	M4.3	79 km
Jun 30, 2010	3 km NW of Saint-Martin-de-Belleville, France	M4.3	149 km

Source: USGS (M2.5+, 1990–2025)

Tsunami History

3 tsunamis recorded within 500 km. Highest wave on record: 4.0 m (13 ft).

Year	Location	Cause	Max Wave	Deaths	Distance
1601	LAKE LUCERNE	Eruption + Earthquake	4.0 m	8	125 km
1996	LAKE BRIENZ	Meteorological	0.5 m	—	120 km
563	LAKE GENEVA	Meteorological	—	—	140 km

Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	38°F (4°C)	2.3 in
February	37°F (3°C)	2.4 in
March	44°F (6°C)	3.3 in
April	50°F (10°C)	3.9 in
May	58°F (14°C)	5.1 in	Wettest
June	64°F (18°C)	4.2 in
July	74°F (23°C)	3.0 in	Warmest
August	68°F (20°C)	4.0 in
September	61°F (16°C)	3.7 in
October	51°F (11°C)	4.2 in
November	41°F (5°C)	3.3 in
December	35°F (2°C)	2.0 in	Coldest, Driest

Grignasco has a seasonal temperature swing of 39°F / from 35°F in December to 74°F in July. Total annual precipitation is 41.5 inches, with May being the wettest month (5.1") and December the driest (2.0").

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