What is the hottest month in Troy?

July is the warmest month in Troy, with an average high of 82.3°F.

What is the coldest month in Troy?

January is the coldest month in Troy, with an average low of 17.1°F.

What month does Troy get the most rain?

May is typically the wettest month in Troy, with about 3.81 inches of precipitation.

What plant hardiness zone is Troy in?

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

Has the climate in Troy changed recently?

8.5% of Troy'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.

Troy, MI

Climate overview — based on NOAA 1991-2020 normals from PONTIAC WWTP, MI US.

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

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Troy has an annual average temperature of 49.1°F with about 33.9 inches of precipitation per year and 36 inches of snow. The warmest month is July (average high 82.3°F), and the coldest is January (average low 17.1°F). May is typically the wettest month (3.81 in) and February the driest (1.87 in). Snow typically falls from November through April.

Pleasant months

2 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

48.4°F

warmest to coldest month

Heating need

6,243

HDD/yr

Cooling need

519

CDD/yr

Best time to visit Troy

Full guide →

Climate change signal

All-time records →

31 of 366 (8.5%) of Troy'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		14
1900s		27
1910s		29
1920s		19
1930s		45
1940s		32
1950s		47
1960s		27
1970s		28
1980s		40
1990s		16
2000s		0
2010s		20
2020s		22

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	31.3°F	17.1°F	24.2°F	2.18 in	12.1 in	13
February	34.0°F	18.2°F	26.1°F	1.87 in	9.0 in	10
March	44.3°F	26.2°F	35.2°F	2.19 in	4.1 in	10
April	57.6°F	36.4°F	47.0°F	2.94 in	0.9 in	11
May	69.4°F	49.0°F	59.2°F	3.81 in	—	13
June	78.2°F	58.6°F	68.4°F	3.29 in	—	11
July	82.3°F	62.9°F	72.6°F	3.14 in	—	10
August	80.8°F	61.7°F	71.3°F	3.24 in	—	10
September	73.9°F	53.7°F	63.8°F	2.92 in	—	9
October	60.5°F	42.3°F	51.4°F	2.90 in	0.1 in	12
November	47.4°F	32.1°F	39.7°F	3.15 in	1.7 in	10
December	36.4°F	24.3°F	30.3°F	2.25 in	8.1 in	12