What is the hottest month in Fort Pierre?

July is the warmest month in Fort Pierre, with an average high of 88.3°F.

What is the coldest month in Fort Pierre?

January is the coldest month in Fort Pierre, with an average low of 9.3°F.

What month does Fort Pierre get the most rain?

June is typically the wettest month in Fort Pierre, with about 3.69 inches of precipitation.

What plant hardiness zone is Fort Pierre in?

Fort Pierre is approximately in USDA plant hardiness Zone 6a, based on the average annual extreme minimum temperature.

Has the climate in Fort Pierre changed recently?

9.6% of Fort Pierre'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.

Fort Pierre, SD

Climate overview — based on NOAA 1991-2020 normals from PIERRE RGNL AP, SD US.

BSk Semi-arid (cold) climate 6a USDA hardiness Zone 6a

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Fort Pierre has an annual average temperature of 47°F with about 20.2 inches of precipitation per year and 37.2 inches of snow. The warmest month is July (average high 88.3°F), and the coldest is January (average low 9.3°F). June is typically the wettest month (3.69 in) and January the driest (0.45 in). Snow typically falls from October through April.

Pleasant months

1 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

55.8°F

warmest to coldest month

Heating need

7,089

HDD/yr

Cooling need

621

CDD/yr

Best time to visit Fort Pierre

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Climate change signal

All-time records →

35 of 366 (9.6%) of Fort Pierre'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.

1890s		0
1900s		0
1910s		0
1920s		0
1930s		72
1940s		39
1950s		30
1960s		26
1970s		30
1980s		43
1990s		39
2000s		40
2010s		22
2020s		25

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	29.0°F	9.3°F	19.1°F	0.45 in	5.1 in	6
February	33.7°F	12.6°F	23.2°F	0.74 in	8.0 in	6
March	45.7°F	22.9°F	34.3°F	0.96 in	5.0 in	6
April	58.5°F	33.3°F	45.9°F	1.93 in	5.3 in	9
May	69.5°F	44.9°F	57.2°F	3.25 in	—	11
June	80.0°F	55.6°F	67.8°F	3.69 in	—	11
July	88.3°F	61.6°F	74.9°F	2.39 in	—	9
August	86.6°F	59.4°F	73.0°F	1.95 in	—	8
September	77.5°F	49.7°F	63.6°F	1.74 in	—	6
October	60.7°F	36.2°F	48.5°F	1.69 in	1.3 in	7
November	44.9°F	23.2°F	34.1°F	0.77 in	6.3 in	5
December	32.4°F	13.2°F	22.8°F	0.64 in	6.2 in	6