Weather & Climate in Grover, CO

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

Grover experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 26°F in January while summers reach 73°F in July. The area gets 316 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 13.4 inches (drier than the 38-inch national average). The area receives 18.8 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 5,077 feet.

Temperature

26°F Jan (-4°C) 73°F Jul (23°C)

Annual Average	47.7°F
	12% below US avg
January Average	26°F (-4°C)
July Average	73°F (23°C)
Sunny Days	316 days/yr

Geography

Elevation	5,077 ft (1,547 m)
Area	0.6 sq mi (1.5 km²)
Population Density	298/sq mi
Coordinates	40.8691°N, 104.2259°W
Timezone	America/Denver
County	Weld County County
Nearest Airport	Cheyenne Regional/Jerry Olson Field (CYS) 36 miles away

Precipitation & Snow

Annual Rainfall 13.4"

65% below US avg

Snowfall 18.8"

Wettest Month (May) 2.36"

Driest Month (Feb) 0.20"

Air Quality

AQI Median	41.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Moderate
Risk Score	89.2 / 100
Social Vulnerability	11.4 / 100
Community Resilience	56.2 / 100

Hazard Breakdown

Tornado	Relatively High
Earthquake	Relatively Low
Wildfire	Relatively Low
Flood	Relatively Moderate
Hail	Relatively High
Strong Wind	Relatively High
Heat Wave	Relatively Low
Winter Weather	Relatively High
Lightning	Relatively High
Ice Storm	Relatively Moderate
Drought	Relatively Low
Cold Wave	Relatively High
Landslide	Very Low
Volcano	Very Low

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

Earthquake History

5 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.2.

Jun 1, 2014	9 km NNW of Kersey, Colorado	M3.2	55 km	1 km
Mar 30, 2019	7 km NE of Greeley, Colorado	M2.9	57 km	6 km
Jun 13, 2025	7 km SE of Erie, Colorado	M2.7	115 km	9 km
Aug 23, 2016	2 km SSE of Eaton, Colorado	M2.6	57 km	10 km
Jun 23, 2014	6 km NNE of Kersey, Colorado	M2.5	54 km	5 km

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

Tornado History

681 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 2 fatalities, 131 injuries.

Date	Rating	Distance	Path	Fatalities
Jun 4, 2015	EF3	100 km	6.7 mi	0
May 22, 2008	EF3	84 km	38.7 mi	1
Jul 16, 1979	EF3	60 km	8.8 mi	1
May 10, 1975	EF3	100 km	8.0 mi	0
Aug 15, 1974	EF3	91 km	2.0 mi	0
Jun 20, 1960	EF3	91 km	26.1 mi	0
Apr 23, 1960	EF3	85 km	17.2 mi	0
May 15, 1952	EF3	67 km	7.4 mi	0
Jun 7, 2021	EF2	99 km	7.5 mi	0
Jul 29, 2018	EF2	84 km	0.1 mi	0
Jul 29, 2018	EF2	87 km	0.1 mi	0
May 27, 2018	EF2	87 km	1.0 mi	0
Jun 12, 2017	EF2	10 km	15.0 mi	0
May 7, 2016	EF2	71 km	8.8 mi	0
May 18, 2010	EF2	37 km	1.5 mi	0
Jun 5, 2009	EF2	86 km	8.3 mi	0
May 22, 2008	EF2	89 km	25.1 mi	0
Jul 31, 1996	EF2	53 km	5.0 mi	0
Jul 30, 1996	EF2	62 km	0.5 mi	0
Jul 13, 1996	EF2	97 km	0.5 mi	0

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

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: HIGH PARK (90,769 acres, 2012).

Year	Name	Acres Burned	Distance
2012	HIGH PARK	90,769	98 km
2000	CO LINE	10,961	93 km
2004	PICNIC ROCK	9,014	86 km
2024	HAPPY JACK	6,585	74 km
2002	UNNAMED	5,258	32 km
2021	313	3,859	97 km
2001	UNNAMED	3,760	98 km
2021	BIJOU	3,485	78 km
2002	UNNAMED	3,275	98 km
2004	ROSETTA LANE	3,164	40 km
2005	LITTLEBEAR	3,125	90 km
2011	CRYSTAL FIRE	2,855	98 km
2002	UNNAMED	2,261	42 km
2021	CROSS CA	2,247	98 km
2020	SUNDAY FIRE	2,204	83 km
2017	CATTLE DRIVE	2,200	67 km
2024	139 FIRE	2,146	76 km
2002	UNNAMED	2,134	35 km
2016	CO RD 128	1,867	12 km
1989	UNNAMED	1,782	94 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	26°F (-4°C)	0.3 in	Coldest
February	32°F (-0°C)	0.2 in	Driest
March	38°F (3°C)	0.8 in
April	45°F (7°C)	1.2 in
May	55°F (13°C)	2.4 in	Wettest
June	65°F (18°C)	2.2 in
July	73°F (23°C)	2.3 in	Warmest
August	70°F (21°C)	1.5 in
September	61°F (16°C)	1.3 in
October	49°F (9°C)	0.7 in
November	35°F (2°C)	0.4 in
December	28°F (-2°C)	0.3 in

Grover has a seasonal temperature swing of 48°F / from 26°F in January to 73°F in July. Total annual precipitation is 13.5 inches, with May being the wettest month (2.4") and February the driest (0.2").

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