Weather in Linn County

Calculated from weather data of The Eastern Iowa Airport (KCID) between 2020 and 2024.

Maximum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	29.0	27.0	32.0	24.0	29.0	31.0
February	35.0	51.0	38.0	32.0	19.0	34.0
March	48.0	55.0	46.0	47.0	51.0	50.0
April	60.0	63.0	63.0	54.0	61.0	58.0
May	72.0		77.0	73.0	68.0	67.0
June	82.0		84.0	83.0	84.0	82.0
July	84.0		85.0	83.0	83.0	84.0
August	82.0		84.0	82.0	84.0	83.0
September	78.0		80.0	77.0	80.0	73.0
October	62.0		64.0	64.0	65.0	57.0
November	47.0		51.0	49.0	49.0	54.0
December	38.0		43.0	37.0	42.0	35.0
Average	58.0	49.0	62.0	59.0	60.0	59.0

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	15.0	17	21	4	17	18
February	17.0	26	20	11	5	18
March	29.0	32	28	28	33	33
April	38.0	41	38	34	40	35
May	51.0		51	53	50	49
June	61.0		60	59	63	62
July	64.0		63	64	64	63
August	61.0		63	61	62	58
September	55.0		58	53	55	51
October	42.0		45	38	48	37
November	28.0		30	29	29	32
December	22.0		30	22	23	20
Average	39.0	29.0	42.0	39.0	41.0	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	44	30	35	22
77 °F or warmer	5	125	108	112	100
68 °F or warmer	14	171	155	158	146
32 °F or colder	66	112	132	123	144

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	10.8	20	11	8	6	9
February	8.1	0	16	8	9	4
March	8.2	11	7	11	8	9
April	8.4	12	2	14	3	6
May	6.4		2	11	8	6
June	3.5		1	5	6	7
July	1.8		2	3	2	2
August	2.5		2	4	3	0
September	4.1		1	3	2	9
October	6.9		7	4	12	4
November	5.9		4	16	4	5
December	9.3		18	18	3	7
Average	6.6	11.2	5.5	8.1	5.5	5.4

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	12.0	11	11	13	11	12
February	12.6	13	13	15	11	12
March	13.5	15	13	14	14	13
April	14.7	17	16	17	13	14
May	11.6		12	13	12	12
June	10.0		9	11	9	11
July	8.2		8	9	8	8
August	8.1		9	8	9	8
September	9.6		9	10	10	11
October	11.9		13	11	11	12
November	12.5		11	14	14	13
December	11.6		11	13	13	11
Average	11.6	14.0	11.1	12.1	11.0	11.2

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

Prevailing wind direction

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

Linn County weather Q&A

What is the warmest month in Linn County?

The warmest month is July with an average temperature of 84 °F over the past years.

What is the coldest month in Linn County?

The coldest month is January with an average daytime temperature of 29 °F in the past few years.

Which month is the wettest in Linn County?

Chance of precipitation is the highest in January with a probability of around 10.9 %.

Which month is the driest in Linn County?

The least rainfall and snow can be expected in July. The probability is about 1.8 %.