Guidonia Montecelio, Italy

Full City Profile

1.9 /5.0

D Poor

67,516 Population 1,479/sq mi density

302 ft Elevation 92 meters

61°F Avg Temperature 16°C

Overall

1.9 / 5.0

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

Economy

1.9 / 5.0

$22,015 median income, 10.8% unemployment

Guidonia Montecelio enjoys a temperate climate with an average annual temperature of 61°F (16°C). Winters average 46°F in January while summers reach 81°F in July. The area gets 312 sunny days per year. Annual precipitation totals 39.5 inches. The area receives 0.6 inches of snow annually.

Temperature

46°F Jan (8°C) 81°F Jul (27°C)

Annual Average	61.4°F
	14% above US avg
January Average	46°F (8°C)
July Average	81°F (27°C)
Sunny Days	312 days/yr

Geography

Elevation	302 ft (92 m)
Area	45.6 sq mi (118.2 km²)
Population Density	1,479/sq mi
Coordinates	41.9936°N, 12.7224°W
Timezone	Europe/Rome

Precipitation & Snow

Annual Rainfall 39.5"

4% above US avg

Snowfall 0.6"

Wettest Month (Nov) 4.65"

Driest Month (Jul) 0.98"

Air Quality

Earthquake History

1,178 earthquakes (M2.5+) within 150 km since 1990. Strongest: M6.3. Most recent: M2.7 on May 8, 2025.

Apr 6, 2009	3 km SE of Sassa, Italy	M6.3	63 km
Aug 24, 2016	5 km WNW of Accumoli, Italy	M6.2	90 km
Sep 26, 1997	3 km SSE of Nocera Umbra, Italy	M6.0	122 km
Sep 26, 1997	6 km WSW of Serravalle di Chienti, Italy	M5.7	118 km
Jan 18, 2017	5 km ESE of Cittareale, Italy	M5.7	79 km
Aug 24, 2016	5 km S of Castelsantangelo sul Nera, Italy	M5.6	101 km
Jan 18, 2017	4 km SE of Cittareale, Italy	M5.6	76 km
Oct 6, 1997	6 km E of Valtopina, Italy	M5.5	117 km
Oct 14, 1997	8 km NNW of Sellano, Italy	M5.5	109 km
Apr 7, 2009	1 km SW of San Panfilo d'Ocre, Italy	M5.5	69 km
Mar 26, 1998	1 km E of Esanatoglia, Italy	M5.4	142 km
Apr 9, 2009	5 km SE of Capitignano, Italy	M5.4	75 km
Jan 18, 2017	4 km SW of Accumoli, Italy	M5.3	84 km
Oct 3, 1997	3 km ENE of Valtopina, Italy	M5.3	120 km
Oct 12, 1997	2 km NW of Sellano, Italy	M5.3	102 km
Apr 3, 1998	8 km E of Valfabbrica, Italy	M5.2	130 km
Jan 18, 2017	3 km N of Montereale, Italy	M5.2	76 km
Apr 9, 2009	2 km ESE of Capitignano, Italy	M5.2	76 km
Apr 6, 2009	5 km ENE of Pizzoli, Italy	M5.1	73 km
Apr 13, 2009	5 km ESE of Capitignano, Italy	M5.0	78 km

Source: USGS (M2.5+, 1990–2025)

Nearby Volcanoes

5 volcanoes within 200 km. Closest: Colli Albani (29 km).

Name	Type	Elevation	Last Eruption	Distance
Colli Albani	Caldera	949 m (3,114 ft)	Unknown	29 km
Vulsini	Caldera	800 m (2,625 ft)	-104	94 km
Ischia	Complex	789 m (2,589 ft)	1302	171 km
Campi Flegrei	Caldera	458 m (1,503 ft)	1538	176 km
Vesuvius	Stratovolcano	1,281 m (4,203 ft)	1944	193 km

Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	46°F (8°C)	3.2 in	Coldest
February	47°F (8°C)	3.0 in
March	51°F (10°C)	2.6 in
April	55°F (13°C)	2.7 in
May	63°F (17°C)	2.1 in
June	71°F (22°C)	1.6 in
July	81°F (27°C)	1.0 in	Warmest, Driest
August	77°F (25°C)	1.7 in
September	70°F (21°C)	3.0 in
October	62°F (16°C)	4.0 in
November	52°F (11°C)	4.7 in	Wettest
December	47°F (8°C)	3.8 in

Guidonia Montecelio has a seasonal temperature swing of 35°F / from 46°F in January to 81°F in July. Total annual precipitation is 33.2 inches, with November being the wettest month (4.7") and July the driest (1.0").

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