What is the hottest month in St. Maries?

August is the warmest month in St. Maries, with an average high of 84.5°F.

What is the coldest month in St. Maries?

January is the coldest month in St. Maries, with an average low of 24.2°F.

What month does St. Maries get the most rain?

December is typically the wettest month in St. Maries, with about 4.44 inches of precipitation.

What plant hardiness zone is St. Maries in?

St. Maries is approximately in USDA plant hardiness Zone 7b, based on the average annual extreme minimum temperature.

Has the climate in St. Maries changed recently?

10.1% of St. Maries'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.

St. Maries, ID

Climate overview — based on NOAA 1991-2020 normals from SAINT MARIES, ID US.

Dsb Mediterranean continental (warm summer) climate 7b USDA hardiness Zone 7b

Year-round temperatures (°F)

Avg high Avg low

Climate summary

St. Maries has an annual average temperature of 47.9°F with about 31.1 inches of precipitation per year and 56 inches of snow. The warmest month is August (average high 84.5°F), and the coldest is January (average low 24.2°F). December is typically the wettest month (4.44 in) and August the driest (0.74 in). Snow typically falls from October through April.

Annual swing

38.1°F

warmest to coldest month

Heating need

6,345

HDD/yr

Cooling need

180

CDD/yr

Best time to visit St. Maries

Full guide →

Climate change signal

All-time records →

37 of 366 (10.1%) of St. Maries'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		2
1900s		37
1910s		26
1920s		20
1930s		42
1940s		47
1950s		21
1960s		34
1970s		23
1980s		36
1990s		19
2000s		18
2010s		24
2020s		17

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	36.7°F	24.2°F	30.4°F	4.41 in	16.3 in	16
February	41.5°F	25.2°F	33.4°F	2.99 in	8.6 in	13
March	49.6°F	29.5°F	39.5°F	3.28 in	5.2 in	14
April	58.0°F	34.9°F	46.5°F	2.30 in	0.7 in	13
May	67.8°F	42.0°F	54.9°F	2.43 in	0.1 in	12
June	73.7°F	47.8°F	60.8°F	2.12 in	—	11
July	84.3°F	52.1°F	68.2°F	0.79 in	—	5
August	84.5°F	51.0°F	67.8°F	0.74 in	—	4
September	74.5°F	43.7°F	59.1°F	1.04 in	—	6
October	58.7°F	35.6°F	47.2°F	2.42 in	0.2 in	11
November	43.7°F	29.6°F	36.6°F	4.15 in	6.6 in	15
December	35.8°F	24.4°F	30.1°F	4.44 in	18.3 in	16