As of 02:05 CDT

Sioux City, IA weather in May

69°

Sioux City, Sunday, 9 August, 02:05

Clear. Feels like 69°. High 91°, low 69°.

Pressure29.88 inHg

Wind3 mph S

Humidity62%

Visibility6.2 mi

Dew point58°

See detailed hourly forecast

In May, Sioux City, IA averages a high of 70.6° and a low of 51.7°. About 4.4 inches of precipitation fall over the month (12 wet days). The record high is 99.1° (1967) and the record low 26.8° (1967). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	64.2°	44.6°	33%	88.5° (1987)	28.8° (1966)
2	64.4°	43.9°	42%	84.6° (1987)	26.8° (1967)
3	65.3°	44.6°	33%	83.1° (2015)	28° (1967)
4	67.8°	47.5°	35%	83.1° (1962)	28.6° (1967)
5	68.5°	48.7°	38%	86.4° (2012)	34.2° (1968)
6	68.2°	49.3°	38%	82.9° (2016)	33.6° (1989)
7	68.7°	50°	40%	86.7° (2014)	33.6° (1989)
8	68.9°	50°	52%	85.6° (2004)	35.1° (1980)
9	69.1°	49.5°	30%	88.3° (2011)	35.2° (2010)
10	69.4°	50.5°	38%	88.9° (2025)	35.1° (2019)
11	68.4°	50.4°	53%	89.2° (2025)	33.8° (2020)
12	67.3°	48.7°	50%	90.9° (2022)	32.7° (2013)
13	68.4°	48.7°	38%	89.1° (1987)	32.2° (1966)
14	70.3°	50.7°	40%	91.2° (2013)	37° (2004)
15	71.4°	50.5°	32%	89.2° (2001)	35.2° (1983)
16	72.7°	51.6°	35%	86.4° (1987)	30.4° (2014)
17	72.1°	53.1°	30%	89.8° (1996)	35.4° (2014)
18	72.3°	53.4°	25%	89.2° (2012)	37.2° (2002)
19	73°	53.2°	33%	89.1° (2022)	37.4° (2015)
20	71.2°	53.2°	32%	88.3° (1970)	39° (2019)
21	72.1°	53.1°	37%	89.6° (1970)	39.9° (2003)
22	72.7°	55°	48%	86.4° (1994)	34° (1963)
23	72.5°	55.4°	55%	88° (2012)	36° (1963)
24	72.3°	54.9°	43%	91° (1967)	41.4° (2002)
25	72.3°	54.3°	40%	99.1° (1967)	44.1° (1979)
26	72.7°	55.2°	33%	91.8° (2018)	37.9° (1992)
27	73.8°	55.8°	47%	95.7° (2018)	38.3° (1971)
28	75°	56.8°	47%	92.7° (2006)	37.6° (1965)
29	75°	57°	42%	95° (1989)	40.8° (1984)
30	74.7°	57.2°	45%	91.4° (1994)	44.4° (1965)
31	74.1°	55.9°	37%	87.8° (2023)	42.3° (1972)