Best year time to visit St. Louis

General weather information about St. Louis

Average annual temperature is 7.1 °C

Absolute maximum temperature: 30.5 °C

Absolute minimum temperature: -28.6 °C

Number of sunny days: 137 days

Number of rainy days: 169 days

Number of snow days: 59 days

Look at detailed online map of St. Louis

* Weather data for St. Louis Canada is based on climate observations for 2026 year

St. Louis air temperature forecast for each month

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	9.0	7.5	5.6	15.1	28.7	30.5	28.3	24.7	27.4	23.0	13.0	14.7
Average daytime temperature (°C)	0.5	-3.9	-0.1	6.7	13.8	18.2	25.7	21.3	20.5	15.3	5.2	3.3
Average temperature (°C)	-3.0	-8.2	-2.6	3.0	9.0	14.6	21.8	18.0	16.7	11.7	2.2	0.4
Average night temperature (°C)	-6.0	-12.3	-5.4	-0.2	5.3	11.5	18.4	15.1	13.7	8.8	-0.4	-2.4
Absolute minimum temperature (°C)	-15.5	-28.6	-12.4	-7.4	1.1	5.9	14.3	11.3	6.8	1.1	-6.9	-7.6

St. Louis monthly weather indicators

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daylight maximum duration (h)	9.0	11.0	12.0	14.0	15.0	15.0	15.0	14.0	13.0	11.0	10.0	8.0
Daylight mean duration (h)	9.0	10.3	11.9	13.6	15.0	15.8	15.4	14.2	12.6	10.9	9.4	8.6
Daylight minimum duration (h)	8.0	9.0	11.0	12.0	14.0	15.0	14.0	13.0	11.0	10.0	8.0	8.0
Sunshine mean duration (h)	3.1	6.3	7.3	9.5	10.1	8.0	10.9	9.0	7.9	6.3	4.7	3.8
Precipitation (mm)	180	54	88	32	70	163	116	174	75	94	73	69
Sunny days	7	13	10	18	13	9	5	7	17	11	12	15
Rainy days	9	3	4	10	18	21	26	24	13	20	13	8
Snow days	15	12	17	2	0	0	0	0	0	0	5	8

St. Louis - weather forecast by months

St. Louis weather in january St. Louis weather in february St. Louis weather in march St. Louis weather in april St. Louis weather in may St. Louis weather in june St. Louis weather in july St. Louis weather in august St. Louis weather in september St. Louis weather in october St. Louis weather in november St. Louis weather in december

Best time to visit St. Louis:

The best time to visit St. Louis during the most sunny months:

April — 9.5(h)
May — 10.1(h)
July — 10.9(h)

Months with the longest average daylight duration in St. Louis:

June — 15.8(h)
July — 15.4(h)

The largest precipitation sum in St. Louis is at

January — 180(mm)

June — 163(mm)

August — 174(mm)

Weather forecast in the closest to St. Louis admin centers