Weather in Missouri

Calculated from weather data of Spirit Of St. Louis Airport (KSUS) between 2020 and 2024.

Maximum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	42.0	37.0	47.0	41.0	40.0	44.0
February	50.0	59.0	54.0	47.0	35.0	47.0
March	58.0	64.0	56.0	61.0	61.0	60.0
April	69.0	70.0	70.0	68.0	67.0	66.0
May	78.0		79.0	78.0	74.0	73.0
June	87.0		87.0	87.0	87.0	87.0
July	90.0		89.0	91.0	87.0	90.0
August	86.0		85.0	87.0	89.0	85.0
September	83.0		83.0	80.0	84.0	79.0
October	69.0		69.0	69.0	72.0	66.0
November	57.0		59.0	57.0	58.0	62.0
December	50.0		52.0	45.0	58.0	48.0
Average	67.0	57.0	69.0	68.0	68.0	67.0

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	26.0	23	30	20	28	30
February	28.0	31	31	22	18	29
March	38.0	39	35	37	40	42
April	46.0	48	43	46	45	44
May	57.0		54	58	53	55
June	65.0		61	64	64	65
July	70.0		69	69	68	71
August	67.0		67	67	68	66
September	60.0		58	56	61	58
October	47.0		47	42	53	44
November	35.0		33	35	34	39
December	30.0		35	31	34	27
Average	46.0	35.0	47.0	46.0	47.0	48.0

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Cold and hot days

Number of days	2024	2023	2022	2021	2020
86 °F or warmer	0	58	68	70	65
77 °F or warmer	14	151	142	149	137
68 °F or warmer	32	197	196	194	185
32 °F or colder	46	72	92	78	75

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	9.3	13	8	5	15	10
February	9.0	3	6	17	13	13
March	9.2	5	12	12	9	9
April	7.7	5	2	12	10	7
May	5.2		2	7	6	5
June	2.7		1	3	3	5
July	3.8		3	8	4	5
August	2.7		5	3	1	1
September	2.0		1	4	3	2
October	7.1		7	6	9	10
November	4.4		3	1	0	5
December	7.0		11	3	5	4
Average	5.8	6.2	4.7	6.7	6.3	6.0

Precipitation during daylight period

Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.

Wind speed (miles per hour)

Month	Average	2024	2023	2022	2021	2020
January	8.4	7	9	9	8	7
February	8.6	9	9	9	9	8
March	9.4	10	10	10	9	8
April	9.3	10	10	10	8	9
May	7.4		7	8	7	7
June	6.4		6	6	6	7
July	5.8		6	6	5	5
August	5.7		6	6	5	5
September	5.4		5	6	6	5
October	7.7		8	8	8	8
November	7.7		6	9	8	8
December	8.0		8	8	8	7
Average	7.6	9.0	7.4	7.7	7.1	7.0

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month	2024	2023	2022	2021	2020
January	W	W	NW	W	W
February	NW	SW	W	NW	NW
March	SW	W	W	S	W
April	W	SW	SW	W	W
May		NE	S	W	NW
June		N	SW	SW	SW
July		SW	W	W	SW
August		W	W	SW	NW
September		W	NW	SW	W
October		W	W	W	NW
November		W	SW	W	SW
December		W	SW	W	W

Prevailing wind direction

Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.

Missouri weather Q&A

What is the warmest month in Missouri?

The warmest month is July with an average temperature of 90 °F over the past years.

What is the coldest month in Missouri?

The coldest month is January with an average daytime temperature of 42 °F in the past few years.

Which month is the wettest in Missouri?

Chance of precipitation is the highest in January with a probability of around 9.3 %.

Which month is the driest in Missouri?

The least rainfall and snow can be expected in September. The probability is about 2.0 %.