Weather in Miami County

Calculated from weather data of James M Cox Dayton International Airport (KDAY) between 2020 and 2024.

Maximum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	39.0	38.0	44.0	35.0	37.0	43.0
February	45.0	51.0	53.0	42.0	33.0	41.0
March	53.0	58.0	53.0	57.0	59.0	55.0
April	63.0	67.0	65.0	60.0	64.0	61.0
May	74.0		74.0	76.0	71.0	70.0
June	82.0		80.0	84.0	83.0	83.0
July	85.0		85.0	85.0	83.0	89.0
August	83.0		82.0	84.0	89.0	83.0
September	79.0		79.0	78.0	80.0	78.0
October	67.0		67.0	67.0	70.0	64.0
November	52.0		55.0	55.0	51.0	58.0
December	45.0		48.0	43.0	51.0	43.0
Average	63.0	53.0	65.0	65.0	64.0	64.0

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	26	32	19	28	31
February	29.0	32	32	25	20	28
March	35.0	38	34	37	36	40
April	44.0	49	44	43	45	42
May	55.0		53	57	52	52
June	63.0		60	64	66	64
July	68.0		67	69	68	69
August	65.0		64	66	68	64
September	60.0		58	59	61	57
October	49.0		49	44	55	47
November	35.0		36	37	34	40
December	31.0		36	32	35	29
Average	45.0	36.0	47.0	47.0	47.0	47.0

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	27	36	40	45
77 °F or warmer	6	108	121	124	116
68 °F or warmer	18	182	174	175	161
32 °F or colder	40	59	81	82	68

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	21.0	31	23	18	19	19
February	13.9	6	7	24	16	20
March	12.7	7	17	17	7	12
April	10.2	9	7	14	12	11
May	8.9		9	11	11	11
June	5.7		7	2	7	3
July	4.4		5	7	5	5
August	3.4		3	4	4	3
September	5.0		3	3	7	2
October	8.2		11	1	11	10
November	9.8		9	11	7	12
December	12.0		13	7	11	14
Average	9.7	13.2	9.0	9.7	9.3	9.5

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	11.5	12	11	11	11	11
February	12.2	11	13	12	12	12
March	13.0	13	14	14	13	12
April	12.2	12	12	13	12	12
May	10.6		9	11	10	11
June	9.7		9	10	10	9
July	8.3		8	9	8	8
August	8.3		9	9	8	8
September	8.6		7	9	10	9
October	10.6		10	13	10	9
November	11.2		11	11	11	12
December	10.8		10	10	11	11
Average	10.7	12.1	10.2	10.9	10.3	10.3

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	SW	SW	W	W	SW
February	W	SW	SW	NW	W
March	SW	W	SW	SW	W
April	SW	SW	SW	SW	W
May		NE	S	W	SW
June		NW	W	SW	W
July		W	W	W	W
August		W	W	SW	W
September		NE	W	SW	SW
October		W	SW	SW	SW
November		SW	SW	SW	SW
December		SW	SW	SW	SW

Prevailing wind direction

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

Miami County weather Q&A

What is the warmest month in Miami County?

The warmest month is July with an average temperature of 85 °F over the past years.

What is the coldest month in Miami County?

The coldest month is January with an average daytime temperature of 39 °F in the past few years.

Which month is the wettest in Miami County?

Chance of precipitation is the highest in January with a probability of around 21.0 %.

Which month is the driest in Miami County?

The least rainfall and snow can be expected in August. The probability is about 3.4 %.