Weather in Saint Clair County in May

General weather information about Saint Clair County

Average annual temperature is 14.8 °C

Absolute maximum temperature: 37.6 °C

Absolute minimum temperature: -11.1 °C

Number of sunny days: 203 days

Number of rainy days: 159 days

Number of snow days: 3 days

* Weather data for Saint Clair County United States is based on climate observations for 2026 year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	19.7	21.4	23.3	28.3	32.2	35.4	37.2	37.6	32.6	30.3	26.5	17.9
Average daytime temperature (°C)	8.4	11.6	13.3	21.0	26.2	30.6	31.8	30.0	27.4	20.7	14.3	10.2
Average temperature (°C)	3.8	5.6	7.1	14.0	19.9	24.2	25.9	24.9	21.6	15.4	8.7	5.7
Average night temperature (°C)	0.6	1.2	2.5	8.3	14.3	18.3	21.3	20.6	16.8	11.1	4.3	2.6
Absolute minimum temperature (°C)	-11.1	-9.8	-6.5	1.1	6.5	12.7	17.4	14.1	11.7	-1.8	-4.7	-5.8

The best time to visit Saint Clair County during the most sunny months:

The largest precipitation sum in Saint Clair County is at

March — 223(mm)

May — 136(mm)

August — 126(mm)

When is the best time to visit Saint Clair County?

The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Saint Clair County.

What is the weather like in Saint Clair County?

See average temperature, rainfall and daylight hours for Saint Clair County by month in the table above.

How many sunny days does Saint Clair County have?

The monthly weather statistics above show sunshine and rainfall patterns for Saint Clair County throughout the year.