Sioux City weather in July: Sioux City, Iowa: normal highs, lows, rain and records for July
Sioux City in July has a normal high of 85°F and a normal low of 63°F, a daily mean of 74°F, holding near 85°F all month. Measurable precipitation falls on 9 days in a normal July, 3.35 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 17°C, 85 mm of precipitation in July.
- NOAA stationSioux City Airport
- Station IDUSW00014943
- Location42.39°N 96.38°W
- Elevation1,095 ft (334 m)
- From the center7 miles
- Population86,875
- Jan 30° 10°
- Feb 34° 15°
- Mar 48° 26°
- Apr 61° 37°
- May 72° 49°
- Jun 82° 59°
- Jul 85° 63°
- Aug 83° 61°
- Sep 77° 51°
- Oct 63° 38°
- Nov 47° 25°
- Dec 33° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Sioux City in July?
The normal high is 85°F and the normal low 63°F, for a daily mean of 74.2°F. July is 3.5°F warmer than June and 2.5°F warmer than August. July is the warmest month of the year in Sioux City and the 4th wettest. Across the month the normal high falls 1°F, from 85°F on July 1 to 84°F on July 31. From one year to the next July's mean temperature typically moves about 3.0°F either way (NOAA's standard deviation), so roughly two Julys in three average between 71°F and 77°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 35%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 85°F | 63°F | 35% | 22% |
| July 8 | 85°F | 63°F | 32% | 20% |
| July 15 | 85°F | 64°F | 31% | 19% |
| July 22 | 85°F | 64°F | 30% | 18% |
| July 31 | 84°F | 63°F | 30% | 18% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 13, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 85°F | 63°F | 35% | 22% | 15 h 10 min |
| July 2 | 85°F | 63°F | 34% | 22% | 15 h 10 min |
| July 3 | 85°F | 63°F | 34% | 22% | 15 h 10 min |
| July 4 | 85°F | 63°F | 34% | 21% | 15 h 10 min |
| July 5 | 85°F | 63°F | 33% | 21% | 15 h 10 min |
| July 6 | 85°F | 63°F | 33% | 21% | 15 h 10 min |
| July 7 | 85°F | 63°F | 33% | 21% | 15 h 10 min |
| July 8 | 85°F | 63°F | 32% | 20% | 15 h 10 min |
| July 9 | 85°F | 63°F | 32% | 20% | 15 h 10 min |
| July 10 | 85°F | 63°F | 32% | 20% | 15 h 10 min |
| July 11 | 85°F | 64°F | 32% | 20% | 15 h 10 min |
| July 12 | 85°F | 64°F | 31% | 20% | 15 h |
| July 13 | 85°F | 64°F | 31% | 19% | 15 h |
| July 14 | 85°F | 64°F | 31% | 19% | 15 h |
| July 15 | 85°F | 64°F | 31% | 19% | 15 h |
| July 16 | 85°F | 64°F | 30% | 19% | 15 h |
| July 17 | 85°F | 64°F | 30% | 19% | 15 h |
| July 18 | 85°F | 64°F | 30% | 18% | 15 h |
| July 19 | 85°F | 64°F | 30% | 18% | 14 h 50 min |
| July 20 | 85°F | 64°F | 30% | 18% | 14 h 50 min |
| July 21 | 85°F | 64°F | 30% | 18% | 14 h 50 min |
| July 22 | 85°F | 64°F | 30% | 18% | 14 h 50 min |
| July 23 | 85°F | 64°F | 30% | 18% | 14 h 50 min |
| July 24 | 85°F | 64°F | 30% | 18% | 14 h 50 min |
| July 25 | 85°F | 64°F | 30% | 18% | 14 h 40 min |
| July 26 | 85°F | 64°F | 30% | 18% | 14 h 40 min |
| July 27 | 85°F | 64°F | 30% | 18% | 14 h 40 min |
| July 28 | 85°F | 64°F | 30% | 18% | 14 h 40 min |
| July 29 | 85°F | 63°F | 30% | 18% | 14 h 40 min |
| July 30 | 85°F | 63°F | 30% | 18% | 14 h 30 min |
| July 31 | 84°F | 63°F | 30% | 18% | 14 h 30 min |
- Normal high
- 85°FJuly average
- Normal low
- 63°FJuly average
- Precipitation
- 3.35 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 8
- Daylight
- 15 h 10 min to 14 h 30 minJuly 1 to July 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 26
- Sunshine
- 84%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014943; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Sioux City in July?
On a given July day the chance of 0.01 inch or more is 31% on average, highest around July 1 (35%). In all, 3.35 in falls on 9 days of a normal July, 1 of them with an inch or more.
In a normal July in Sioux City, 8 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014943.
How humid and windy is Sioux City in July?
At 3 p.m. the normal temperature is 83°F with 55% relative humidity and a dew point of 65°F; at 6 a.m. it is 65°F with 91% humidity. The wind averages 7.6 mph, most often from the south in the afternoon. A dew point of 65°F or more feels muggy to most people.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 65°F | 62°F | 91% | 6.1 mph | 64% |
| 9 a.m. | 74°F | 65°F | 74% | 7.7 mph | 72% |
| noon | 80°F | 65°F | 60% | 9.6 mph | 64% |
| 3 p.m. | 83°F | 65°F | 55% | 9.9 mph | 70% |
| 6 p.m. | 81°F | 65°F | 59% | 9.1 mph | 77% |
| 9 p.m. | 73°F | 66°F | 78% | 6.4 mph | 78% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014943. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for July in Sioux City?
The warmest July temperature on Sioux City's official record (since 1889) is 111°F, on July 17, 1936; the coldest is 41°F, on July 9, 1895. The wettest July brought 10.33 in (1972).
The July mean against the 1991-2020 normal of 74.2°F: 2021 74.6°F (+0.4), 2022 76.6°F (+2.4), 2023 73.1°F (−1.1), 2024 73.7°F (−0.5), 2025 75.3°F (+1.1), 2026 77.3°F (+3.1). 4 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 74.6°F | +0.4°F | 1.43 in |
| 2022 | 76.6°F | +2.4°F | 1.86 in |
| 2023 | 73.1°F | −1.1°F | 2.94 in |
| 2024 | 73.7°F | −0.5°F | 7.40 in |
| 2025 | 75.3°F | +1.1°F | 6.62 in |
| 2026 | 77.3°F | +3.1°F | 2.80 in |
Source: records: ACIS, NWS threaded record SUXthr; recent months: ACIS, station USW00014943. Records and recent months use complete months only.
How does July in Sioux City compare across Iowa?
Across the 132 places PlainClimate covers in Iowa, July normal highs run from 79°F in Northwood to 87°F in Glenwood; Sioux City's is 85°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.