Weather & Climate in Grenville, NM

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Grenville experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 34°F in January while summers reach 72°F in July. The area gets 330 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 16.6 inches (drier than the 38-inch national average). The area receives 17.9 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 37. The city sits at an elevation of 5,971 feet.

Temperature

34°F Jan (1°C) 72°F Jul (22°C)

Annual Average	51.9°F
	4% below US avg
January Average	34°F (1°C)
July Average	72°F (22°C)
Sunny Days	330 days/yr

Geography

Elevation	5,971 ft (1,820 m)
Area	0.6 sq mi (1.6 km²)
Population Density	105/sq mi
Coordinates	36.5905°N, 103.6146°W
Timezone	America/Denver
County	Union County County
Nearest Airport	Southeast Colorado Regional (LAA) 114 miles away

Precipitation & Snow

Annual Rainfall 16.6"

56% below US avg

Snowfall 17.9"

Wettest Month (Jul) 3.11"

Driest Month (Jan) 0.24"

Air Quality

AQI Median	37.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	12.1 / 100
Social Vulnerability	83.7 / 100
Community Resilience	10.7 / 100

Hazard Breakdown

Tornado	Very Low
Earthquake	Very Low
Wildfire	Relatively Low
Flood	Very Low
Hail	Relatively Low
Strong Wind	Very Low
Heat Wave	Very Low
Winter Weather	Relatively Moderate
Lightning	Relatively Low
Ice Storm	Very Low
Drought	Relatively High
Cold Wave	Very Low
Landslide	Very Low
Volcano	No Rating
Avalanche	Very Low

Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

340 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.3.

Aug 23, 2011	6 km S of Valdez, Colorado	M5.3	110 km	4 km
Aug 10, 2005	20 km S of Weston, Colorado	M5.0	116 km	5 km
Aug 22, 2011	9 km SSW of Starkville, Colorado	M4.7	97 km	5 km
Sep 5, 2001	0 km SE of Cokedale, Colorado	M4.5	108 km	5 km
Jan 3, 2007	8 km SSW of Weston, Colorado	M4.4	126 km	5 km
Mar 22, 2004	30 km S of Weston, Colorado	M4.4	114 km	5 km
Aug 1, 2004	31 km S of Stonewall Gap, Colorado	M4.3	136 km	5 km
Mar 10, 2023	6 km NNE of Segundo, Colorado	M4.3	119 km	6 km
Aug 10, 2005	20 km SSW of Segundo, Colorado	M4.1	115 km	5 km
Jun 19, 2023	Colorado	M4.1	111 km	6 km
Jul 29, 2009	32 km NNE of Cimarron, New Mexico	M4.1	111 km	5 km
Sep 4, 2001	2 km W of Cokedale, Colorado	M4.0	111 km	5 km
Feb 6, 2016	Colorado	M4.0	132 km	2 km
Aug 23, 2011	7 km S of Valdez, Colorado	M4.0	109 km	5 km
Sep 13, 2011	20 km S of Sequndo, Colorado	M4.0	107 km	5 km
Aug 26, 2023	19 km SSW of Weston, Colorado	M4.0	125 km	4 km
Sep 16, 2011	26 km S of Sequndo, Colorado	M3.9	106 km	5 km
Mar 10, 2023	5 km N of Sequndo, Colorado	M3.9	118 km	4 km
Aug 23, 2016	18 km SSW of Weston, CO	M3.9	126 km	4 km
Aug 20, 2015	7 km WSW of Weston, Colorado	M3.9	129 km	1 km

Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

140 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 fatality, 17 injuries.

Date	Rating	Distance	Path	Fatalities
May 14, 1977	EF3	92 km	0.1 mi	0
May 29, 1964	EF3	87 km	3.0 mi	1
May 31, 2010	EF2	99 km	2.8 mi	0
May 23, 2010	EF2	67 km	8.8 mi	0
May 23, 2010	EF2	49 km	22.0 mi	0
May 10, 1972	EF2	99 km	2.5 mi	0
Apr 19, 1971	EF2	96 km	7.2 mi	0
Apr 19, 1971	EF2	88 km	0.1 mi	0
Sep 18, 1965	EF2	56 km	5.1 mi	0
May 17, 1962	EF2	88 km	10.8 mi	0
Jun 5, 1961	EF2	56 km	28.5 mi	0
May 16, 2016	EF1	74 km	0.9 mi	0
Jun 6, 2014	EF1	95 km	8.6 mi	0
Jun 6, 2014	EF1	83 km	1.4 mi	0
May 23, 2010	EF1	87 km	5.7 mi	0
May 23, 2010	EF1	56 km	4.2 mi	0
May 23, 2010	EF1	72 km	9.3 mi	0
May 15, 2003	EF1	66 km	5.0 mi	0
Jun 7, 1998	EF1	79 km	3.0 mi	0
May 25, 1996	EF1	60 km	4.0 mi	0

Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: GLADSTONE (44,125 acres, 2006).

Year	Name	Acres Burned	Distance
2006	GLADSTONE	44,125	60 km
2011	TRACK	28,893	83 km
2018	STATELINE	28,533	64 km
2022	MITCHELL	23,220	79 km
2011	RABBIT EAR	21,569	37 km
2005	GLADSTONE	16,794	37 km
2011	296	16,769	97 km
2006	CLAPHAM	14,696	58 km
2011	BRITT	13,980	96 km
2020	CHERRY CANYON	11,823	94 km
2011	PRITCHARD	11,547	92 km
1989	LIBBY	10,695	79 km
1996	FARLEY	10,456	57 km
2002	FURNISH	8,862	66 km
1996	RABBIT	8,457	35 km
1988	UNNAMED	8,454	33 km
2006	FERGUSON	8,226	34 km
2002	JAMES AND JOHN	7,190	88 km
2016	CLAVEL	7,115	66 km
2006	UNION	7,051	22 km

Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	34°F (1°C)	0.2 in	Driest
February	35°F (2°C)	0.4 in
March	41°F (5°C)	0.7 in
April	49°F (9°C)	1.0 in
May	58°F (14°C)	2.3 in
June	67°F (19°C)	2.3 in
July	72°F (22°C)	3.1 in	Warmest, Wettest
August	70°F (21°C)	2.6 in
September	63°F (17°C)	1.9 in
October	53°F (11°C)	0.8 in
November	41°F (5°C)	0.5 in
December	33°F (1°C)	0.3 in	Coldest

Grenville has a seasonal temperature swing of 39°F / from 33°F in December to 72°F in July. Total annual precipitation is 16.1 inches, with July being the wettest month (3.1") and January the driest (0.2").

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