What is the hottest month in St. James?

July is the warmest month in St. James, with an average high of 88.9°F.

What is the coldest month in St. James?

January is the coldest month in St. James, with an average low of 22.4°F.

What month does St. James get the most rain?

May is typically the wettest month in St. James, with about 5.48 inches of precipitation.

What plant hardiness zone is St. James in?

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

Has the climate in St. James changed recently?

10.7% of St. James'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. James, MO

Climate overview — based on NOAA 1991-2020 normals from ROLLA MISSOURI S&T, MO US.

Dfa Hot-summer humid continental climate 7b USDA hardiness Zone 7b

Year-round temperatures (°F)

Avg high Avg low

Climate summary

St. James has an annual average temperature of 56.3°F with about 47.4 inches of precipitation per year and 17.3 inches of snow. The warmest month is July (average high 88.9°F), and the coldest is January (average low 22.4°F). May is typically the wettest month (5.48 in) and February the driest (2.49 in). Snow typically falls from November through April.

Pleasant months

1 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

47.1°F

warmest to coldest month

Heating need

4,359

HDD/yr

Cooling need

1,233

CDD/yr

Best time to visit St. James

Full guide →

Climate change signal

All-time records →

39 of 366 (10.7%) of St. James'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		9
1910s		67
1920s		30
1930s		44
1940s		22
1950s		58
1960s		13
1970s		9
1980s		29
1990s		16
2000s		13
2010s		23
2020s		33

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	40.9°F	22.4°F	31.7°F	2.73 in	5.6 in	9
February	46.1°F	26.2°F	36.1°F	2.49 in	4.1 in	9
March	56.0°F	34.8°F	45.4°F	4.14 in	2.6 in	12
April	67.2°F	45.4°F	56.3°F	4.90 in	0.2 in	12
May	75.9°F	55.7°F	65.8°F	5.48 in	—	13
June	84.1°F	64.6°F	74.3°F	4.37 in	—	10
July	88.9°F	68.7°F	78.8°F	4.74 in	—	9
August	88.1°F	67.1°F	77.6°F	4.52 in	—	9
September	80.4°F	58.9°F	69.6°F	4.00 in	—	8
October	69.1°F	47.3°F	58.2°F	3.26 in	0.1 in	9
November	55.7°F	36.4°F	46.0°F	3.92 in	1.3 in	10
December	44.8°F	27.2°F	36.0°F	2.83 in	3.4 in	9