Weather Averages for Saint Louis, MO

Weather Averages for
Saint Louis, MO

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

	Unit	Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Average temperature over 50 years	°C	13	-1	1	6	13	18	23	26	25	21	15	7	1
Average high temperature over 50 years	°C	18	3	6	12	19	24	29	31	30	26	20	12	6
Average low temperature over 50 years	°C	7	-6	-3	1	7	12	18	20	19	15	8	2	-3
Highest recorded temperature over 50 years	°C	46	25	28	31	33	36	40	46	41	40	34	29	24
Lowest recorded temperature over 50 years	°C	-27	-27	-23	-20	-5	0	6	10	8	2	-5	-17	-26
Average number of rainy days over 36 years	days	111	8	8	11	11	11	9	9	8	8	8	10	9
Average number of days above 27°C over 50 years	days	43	-	-	-	-	1	9	15	13	5	-	-	-
Average precipitation over 50 years	cm	94.2	5.1	5.3	8.4	9.1	9.9	9.7	9.7	7.6	7.6	7.1	7.9	6.6
Average dew point over 51 years	°C	6	-5	-3	0	5	11	16	18	18	13	7	1	-3
Average number of days above 17°C over 50 years	days	180	-	1	5	13	24	29	31	31	26	16	4	1
Most recorded rainfall over 50 years	cm	139.7	20.3	12.7	17.0	26.2	32.8	26.7	32.3	37.6	25.4	18.0	25.1	19.8
Least recorded rainfall over 50 years	cm	52.3	0.3	0.8	2.0	2.5	2.5	1.0	1.5	0.3	-	0.5	0.3	-
Average number of days with thunderstorms over 50 years	days	48	1	1	3	6	7	8	7	6	4	2	2	1
Average number of days with fog over 50 years	days	143	13	13	13	11	11	9	9	13	13	12	12	14
Average morning relative humidity over 51 years	%	82	80	80	80	77	81	82	83	86	86	82	80	81
Average evening relative humidity over 51 years	%	54	62	58	54	49	51	51	51	51	50	50	56	63
Average wind speed over 51 years	km/h	17.7	19.3	19.3	20.9	20.9	16.1	16.1	14.5	12.9	14.5	16.1	19.3	19.3
Average number of days below -1.5°C over 50 years	days	98	26	20	14	2	-	-	-	-	-	1	11	22
Average number of days below -17.5°C over 30 years	days	2.8	1.6	0.5	-	-	-	-	-	-	-	-	-	0.7
Average snowfall over 57 years	cm	50.3	13.5	11.9	10.7	1.0	-	-	-	-	-	-	3.6	9.7
Average number of clear days over 45 years	days	101	7	7	7	7	7	7	9	10	12	12	9	7
Most rain reported in a day over 56 years	cm	14.2	10.7	6.1	6.1	12.2	14.2	10.2	11.9	6.3	7.4	6.9	8.1	7.1
Most rain reported in a month over 56 years	cm	139.7	20.3	12.7	19.3	26.2	32.8	26.7	32.3	16.3	23.4	18.0	25.4	19.8
Least rain reported in a month over 56 years	cm	52.3	0.3	0.8	2.0	2.5	2.5	1.0	1.5	0.3	-	0.5	0.3	-
Heating degree days over 30 years	days	4758	1107	871	617	266	111	-	-	-	21	237	564	964
Cooling degree days over 30 years	days	1534	-	-	-	17	145	312	459	391	177	33	-	-
Average possibility of sunshine over 34 years	%	57	51	52	53	56	59	66	68	64	63	59	46	43
Average number of cloudy days over 45 years	days	163	17	15	16	15	14	12	11	10	10	11	15	17
Average number of partly cloudy days over 45 years	days	101	7	6	8	8	10	11	11	11	8	8	6	7
Average number of days below -12.5°C over 50 years	days	12	6	3	-	-	-	-	-	-	-	-	-	3
Most snow reported in a month over 56 years	cm	125.0	60.7	52.8	56.6	16.5	1.5	-	-	-	-	-	28.7	66.8

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°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

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

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Weather Averages Saint Louis, MO