Home › Cities › United States › Iowa › Coralville

Coralville, Iowa climate

Dfa Hot-summer humid continental

Coralville has a strongly seasonal cool-temperate climate (Hot-summer humid continental, Köppen Dfa). The hottest month is July with an average daily high near 28°C, while the coldest is January averaging around −12°C at night. Precipitation totals about 912 mm a year and is strongly seasonal — June alone averages 141 mm while January barely receives 24 mm.

☀️ Summers

Warm

Highs near 28°C in July.

About 12 days a year above 32 °C

❄️ Winters

Very cold

Lows near −12°C in January.

About 144 freezing nights a year

🌧️ Rain

Moderate rainfall

About 912 mm of rain a year.

Wettest in June

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

+0.0 °C vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Coralville climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	−2	0	8	16	22	27	28	27	24	16	8	1
Avg temp (°C)	−7	−4	3	9	16	21	23	22	17	10	3	−4
Avg low (°C)	−12	−9	−3	3	10	15	17	16	11	4	−2	−8
Precipitation (mm)	24	31	51	90	108	141	112	103	86	74	51	40

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	−2	0	8	16	22	27
Avg temp (°C)	−7	−4	3	9	16	21
Avg low (°C)	−12	−9	−3	3	10	15
Precipitation (mm)	24	31	51	90	108	141

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	28	27	24	16	8	1
Avg temp (°C)	23	22	17	10	3	−4
Avg low (°C)	17	16	11	4	−2	−8
Precipitation (mm)	112	103	86	74	51	40

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	7	7	9	12	13	12	10	10	9	9	8	8
Days with high ≥ 32°C (days)	—	—	—	0.0	0.5	3	5	3	1	0.1	—	—
Days with low ≤ 0°C (days)	30	26	23	8	0.4	—	—	—	0.3	7	21	28
Days with snowfall ≥ 2.5 cm (days)	2	1	0.7	0.3	—	—	—	—	—	0.0	0.2	1

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	7	7	9	12	13	12
Days with high ≥ 32°C (days)	—	—	—	0.0	0.5	3
Days with low ≤ 0°C (days)	30	26	23	8	0.4	—
Days with snowfall ≥ 2.5 cm (days)	2	1	0.7	0.3	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	10	10	9	9	8	8
Days with high ≥ 32°C (days)	5	3	1	0.1	—	—
Days with low ≤ 0°C (days)	—	—	0.3	7	21	28
Days with snowfall ≥ 2.5 cm (days)	—	—	—	0.0	0.2	1

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	65	66	65	65	65	58	50	50	47	58	63	66
Relative humidity (%)	87	83	78	74	75	76	75	73	71	74	80	87
Wind speed (m/s)	3.8	3.8	3.9	3.9	3.3	2.7	2.3	2.3	2.7	3.2	3.4	3.4

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	65	66	65	65	65	58
Relative humidity (%)	87	83	78	74	75	76
Wind speed (m/s)	3.8	3.8	3.9	3.9	3.3	2.7

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	50	50	47	58	63	66
Relative humidity (%)	75	73	71	74	80	87
Wind speed (m/s)	2.3	2.3	2.7	3.2	3.4	3.4

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Cedar Rapids Muni AP (NOAA GHCN station USW00014990), about 26 km from the city centre.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →