Weather in Idaho

Calculated from weather data of Mountain Home Air Force Base (KMUO) between 2020 and 2024.

Maximum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	38.0	39.0	38.0	32.0	41.0	43.0
February	44.0	49.0	42.0	40.0	43.0	47.0
March	54.0	54.0	45.0	57.0	58.0	56.0
April	63.0	64.0	61.0	59.0	66.0	65.0
May	74.0		76.0	68.0	74.0	75.0
June	84.0		80.0	83.0	91.0	82.0
July	96.0		97.0	97.0	99.0	93.0
August	93.0		92.0	97.0	89.0	94.0
September	82.0		81.0	87.0	82.0	84.0
October	64.0		65.0	69.0	64.0	64.0
November	49.0		51.0	41.0	52.0	49.0
December	38.0		42.0	32.0	39.0	38.0
Average	63.0	52.0	64.0	65.0	67.0	66.0

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	25.0	26	24	21	28	30
February	26.0	32	22	21	26	25
March	31.0	31	28	32	29	32
April	37.0	36	34	33	37	37
May	45.0		48	41	46	47
June	54.0		53	51	60	52
July	62.0		62	63	66	59
August	60.0		61	63	58	61
September	50.0		50	52	47	49
October	37.0		40	38	42	36
November	29.0		31	23	34	29
December	25.0		29	21	26	22
Average	39.0	31.0	40.0	39.0	42.0	40.0

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	73	86	78	91
77 °F or warmer	2	130	121	129	122
68 °F or warmer	11	170	164	158	164
32 °F or colder	58	125	135	105	116

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	12.2	18	13	12	4	11
February	7.5	14	5	3	7	7
March	6.7	6	15	4	4	6
April	6.2	8	9	12	3	1
May	7.7		11	10	4	8
June	4.5		5	9	3	8
July	1.1		3	1	1	1
August	1.6		5	4	1	0
September	2.4		7	2	2	1
October	4.6		10	1	8	3
November	6.5		10	9	5	9
December	8.6		9	16	10	4
Average	6.0	11.2	8.3	6.7	4.1	4.7

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	10.8	13	12	10	8	10
February	12.9	12	15	13	12	12
March	12.1	11	15	14	12	9
April	13.0	13	15	13	12	12
May	10.7		9	12	13	11
June	10.6		10	10	11	11
July	9.1		9	9	9	10
August	9.2		10	9	10	10
September	9.0		9	9	10	10
October	9.7		11	8	11	10
November	10.3		9	11	11	10
December	9.5		9	9	12	9
Average	10.8	12.0	10.9	10.6	11.0	10.4

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	E	E	E	E	E
February	NE	E	E	NW	NW
March	NW	E	N	N	NW
April	NW	NW	N	NW	NW
May		NE	NW	NW	NW
June		NW	N	N	NW
July		NW	N	N	NW
August		NE	E	NW	NW
September		N	E	N	N
October		NE	N	NE	NW
November		E	E	E	E
December		E	E	E	E

Prevailing wind direction

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

Idaho weather Q&A

What is the warmest month in Idaho?

The warmest month is July with an average temperature of 96 °F over the past years.

What is the coldest month in Idaho?

The coldest month is December with an average daytime temperature of 38 °F in the past few years.

Which month is the wettest in Idaho?

Chance of precipitation is the highest in January with a probability of around 12.2 %.

Which month is the driest in Idaho?

The least rainfall and snow can be expected in July. The probability is about 1.1 %.