Weather Averages for Saint Louis, MO

Weather Averages for
Saint Louis, MO

Latitude: 38°33'N, Longitude: 89°51'W, Elevation: 135.0 m, Distance: 12.01 km

	Unit	Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Average temperature over 21 years	°C	11	0	0	5	11	17	22	25	23	20	13	5	0
Average high temperature over 21 years	°C	16	2	5	10	17	23	28	30	30	25	20	10	5
Average low temperature over 21 years	°C	6	-5	-3	0	6	11	17	20	17	13	7	0	-2
Highest recorded temperature over 51 years	°C	43	23	27	30	33	36	40	43	40	39	35	28	23
Lowest recorded temperature over 51 years	°C	-28	-28	-23	-19	-5	-1	6	8	6	-2	-4	-15	-21
Average number of rainy days over 51 years	days	105	8	8	11	11	10	9	8	7	7	8	9	9
Average precipitation over 21 years	cm	94.2	5.6	6.3	7.9	9.7	10.4	9.4	9.1	8.1	8.6	6.6	6.6	6.3
Average dew point over 10 years	°C	6	-6	-4	0	5	11	16	20	18	13	7	2	-3
Average number of days with thunderstorms over 40 years	days	51	1	1	3	6	7	8	8	7	4	3	2	1
Average number of days with fog over 40 years	days	168	13	13	14	11	14	12	16	18	16	14	13	14
Average morning relative humidity over 10 years	%	75.3	71.7	74.6	74	69.5	73	75	78.3	79.9	79.6	77.9	75.6	74.1
Average evening relative humidity over 10 years	%	54.9	57.4	59.4	55.7	49.4	51.6	52.5	54.8	53.7	51.9	52.5	58.6	61.4
Average wind speed over 12 years	km/h	17.7	9.7	12.9	9.7	8.0	6.4	4.8	4.8	6.4	6.4	9.7	9.7	8.0
Average snowfall over 43 years	cm	46.2	13.7	9.9	8.6	1.5	-	-	-	-	-	-	3.6	7.9
Most rain reported in a day over 51 years	cm	23.4	9.1	8.9	6.3	7.4	8.9	20.8	14.0	23.4	9.1	10.2	17.0	8.1
Most rain reported in a month over 51 years	cm	146.6	22.6	20.3	25.4	23.9	25.1	43.7	29.5	53.6	24.1	20.6	25.4	23.1
Least rain reported in a month over 51 years	cm	52.3	0.3	0.8	-	2.8	3.6	2.3	1.0	0.3	0.3	0.3	0.8	0.3
Heating degree days over 50 years	days	4727	1065	851	645	287	88	5	-	1	44	236	586	919
Cooling degree days over 50 years	days	1454	-	-	3	29	109	307	424	368	176	36	2	-
Average number of days below -12.5°C over 51 years	days	10	5	2	1	-	-	-	-	-	-	-	-	2
Average number of days above 22°C over 12 years	days	51	-	1	4	11	23	29	27	16	6	1	-	118
Most snow reported in a month over 43 years	cm	87.1	58.9	35.6	51.8	43.9	-	-	-	-	-	0.5	32.3	58.7
Average possibility of clouds over 10 years	%	52.3	58.7	61.5	60.8	53.5	52.4	50.1	40.8	38.8	42.5	50.7	57.5	61.6
Average number of snowy days over 43 years	days	13	4	3	2	1	-	-	-	-	-	-	1	2
Average number of days below -1°C over 51 years	days	98	26	21	14	2	-	-	-	-	-	1	12	22
Most snow reported in a day over 43 years	cm	169.2	30.7	18.5	24.1	-	-	-	-	-	0.5	26.2	34.5	34.5
Deepest snow cover reported over 43 years	cm	50.8	40.6	45.7	40.6	27.9	-	-	-	-	-	-	50.8	33.0
Average wet bulb point over 10 years	°C	10	-2	-1	4	9	15	19	21	20	16	10	5	0

Check weather averages for nearby locations (some locations might offer more data):

Latitude: 38°37'N, Longitude: 90°12'W, Elevation: 142.0 m, Distance: 0.67 km

Latitude: 38°45'N, Longitude: 90°22'W, Elevation: 163.1 m, Distance: 7.75 km

Latitude: 38°52'N, Longitude: 90°10'W, Elevation: 131.1 m, Distance: 10.15 km

Latitude: 38°46'N, Longitude: 90°30'W, Elevation: 142.3 m, Distance: 11.83 km

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Weather Averages Saint Louis, MO