What is the hottest month in Grantsville?

July is the warmest month in Grantsville, with an average high of 92.2°F.

What is the coldest month in Grantsville?

January is the coldest month in Grantsville, with an average low of 19.2°F.

What month does Grantsville get the most rain?

May is typically the wettest month in Grantsville, with about 1.53 inches of precipitation.

What plant hardiness zone is Grantsville in?

Grantsville is approximately in USDA plant hardiness Zone 7a, based on the average annual extreme minimum temperature.

Has the climate in Grantsville changed recently?

45.6% of Grantsville's all-time daily heat records were set in the last decade (since 2015), compared to roughly 5% if records were evenly distributed over time.

Grantsville, UT

Climate overview — based on NOAA 1991-2020 normals from GRANTSVILLE 2W, UT US.

BSk Semi-arid (cold) climate 7a USDA hardiness Zone 7a

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Grantsville has an annual average temperature of 51.2°F with about 11.6 inches of precipitation per year and 33.1 inches of snow. The warmest month is July (average high 92.2°F), and the coldest is January (average low 19.2°F). May is typically the wettest month (1.53 in) and July the driest (0.66 in). Snow typically falls from November through April.

Pleasant months

1 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

49.8°F

warmest to coldest month

Heating need

5,802

HDD/yr

Cooling need

816

CDD/yr

Best time to visit Grantsville

Full guide →

Climate change signal

All-time records →

167 of 366 (45.6%) of Grantsville's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.

1900s		0
1910s		3
1920s		0
1930s		0
1940s		0
1950s		0
1960s		0
1970s		0
1980s		0
1990s		5
2000s		148
2010s		106
2020s		104

Bars: number of all-time daily heat records still standing that were set in each decade.

Monthly averages

Month	Avg High	Avg Low	Avg Temp	Precipitation	Snow	Rainy days
January	37.1°F	19.2°F	28.1°F	0.81 in	7.2 in	7
February	43.0°F	23.1°F	33.0°F	0.94 in	7.5 in	7
March	53.3°F	30.2°F	41.7°F	1.10 in	3.5 in	8
April	60.5°F	35.6°F	48.0°F	1.52 in	1.9 in	9
May	70.9°F	44.7°F	57.8°F	1.53 in	—	8
June	82.2°F	54.3°F	68.3°F	0.69 in	—	4
July	92.2°F	63.7°F	77.9°F	0.66 in	—	4
August	90.3°F	61.7°F	76.0°F	0.73 in	—	4
September	78.6°F	50.1°F	64.4°F	0.90 in	—	5
October	64.1°F	38.0°F	51.0°F	0.91 in	0.1 in	6
November	49.1°F	27.8°F	38.5°F	0.93 in	5.0 in	6
December	38.2°F	20.0°F	29.1°F	0.83 in	7.9 in	8