Sioux City weather in March: Sioux City, Iowa: normal highs, lows, rain and records for March
Sioux City in March has a normal high of 48°F and a normal low of 26°F, a daily mean of 37°F, rising from 40°F on the 1st to 55°F by the 31st. Measurable precipitation falls on 8 days in a normal March, 1.76 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 9°C and low of −3°C, 45 mm of precipitation and 14 cm of snow in March.
- 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 March?
The normal high is 48°F and the normal low 26°F, for a daily mean of 36.7°F. March is 12.2°F warmer than February and 12.2°F cooler than April. March is the 8th warmest month of the year in Sioux City and the 8th wettest. Across the month the normal high rises 15°F, from 40°F on March 1 to 55°F on March 31. From one year to the next March's mean temperature typically moves about 5.3°F either way (NOAA's standard deviation), so roughly two Marchs in three average between 31°F and 42°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 30%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| March 1 | 40°F | 20°F | 23% | 11% |
| March 8 | 43°F | 23°F | 24% | 11% |
| March 15 | 47°F | 26°F | 25% | 12% |
| March 22 | 51°F | 28°F | 27% | 13% |
| March 31 | 55°F | 31°F | 30% | 16% |
Every day of March: normal high, low and chance of precipitation (warmest afternoon March 31, coldest night March 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| March 1 | 40°F | 20°F | 23% | 11% | 11 h 10 min |
| March 2 | 40°F | 20°F | 23% | 11% | 11 h 10 min |
| March 3 | 41°F | 21°F | 23% | 11% | 11 h 20 min |
| March 4 | 41°F | 21°F | 23% | 11% | 11 h 20 min |
| March 5 | 42°F | 22°F | 24% | 11% | 11 h 20 min |
| March 6 | 42°F | 22°F | 24% | 11% | 11 h 30 min |
| March 7 | 43°F | 22°F | 24% | 11% | 11 h 30 min |
| March 8 | 43°F | 23°F | 24% | 11% | 11 h 30 min |
| March 9 | 44°F | 23°F | 24% | 11% | 11 h 30 min |
| March 10 | 44°F | 24°F | 24% | 11% | 11 h 40 min |
| March 11 | 45°F | 24°F | 25% | 11% | 11 h 40 min |
| March 12 | 46°F | 25°F | 25% | 11% | 11 h 40 min |
| March 13 | 46°F | 25°F | 25% | 12% | 11 h 50 min |
| March 14 | 47°F | 25°F | 25% | 12% | 11 h 50 min |
| March 15 | 47°F | 26°F | 25% | 12% | 11 h 50 min |
| March 16 | 48°F | 26°F | 26% | 12% | 11 h 50 min |
| March 17 | 48°F | 26°F | 26% | 12% | 12 h |
| March 18 | 49°F | 27°F | 26% | 12% | 12 h |
| March 19 | 49°F | 27°F | 26% | 13% | 12 h |
| March 20 | 50°F | 28°F | 27% | 13% | 12 h 10 min |
| March 21 | 50°F | 28°F | 27% | 13% | 12 h 10 min |
| March 22 | 51°F | 28°F | 27% | 13% | 12 h 10 min |
| March 23 | 51°F | 29°F | 28% | 13% | 12 h 10 min |
| March 24 | 52°F | 29°F | 28% | 14% | 12 h 20 min |
| March 25 | 52°F | 29°F | 28% | 14% | 12 h 20 min |
| March 26 | 53°F | 30°F | 28% | 14% | 12 h 20 min |
| March 27 | 53°F | 30°F | 29% | 14% | 12 h 30 min |
| March 28 | 54°F | 30°F | 29% | 15% | 12 h 30 min |
| March 29 | 54°F | 31°F | 29% | 15% | 12 h 30 min |
| March 30 | 55°F | 31°F | 29% | 15% | 12 h 30 min |
| March 31 | 55°F | 31°F | 30% | 16% | 12 h 40 min |
- Normal high
- 48°FMarch average
- Normal low
- 26°FMarch average
- Precipitation
- 1.76 inmonth total
- Days with precipitation
- 80.01 inch or more
- Snowfall
- 5.7 inmonth total
- Nights at 32°F or colder
- 23
- Daylight
- 11 h 10 min to 12 h 40 minMarch 1 to March 31
- Days at 70°F or more
- 3
- Days at 80°F or more
- 1
- Sunshine
- 70%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 or snow in Sioux City in March?
On a given March day the chance of 0.01 inch or more is 26% on average, highest around March 31 (30%). In all, 1.76 in falls on 8 days of a normal March.
In a normal March in Sioux City, 23 nights fall to freezing, 4 days stay below freezing all day and snowfall averages 5.7 inches.
Snow falls on 3 days in a normal March, and an inch or more covers the ground on 7 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014943.
How humid and windy is Sioux City in March?
At 3 p.m. the normal temperature is 54°F with 43% relative humidity and a dew point of 32°F; at 6 a.m. it is 36°F with 80% humidity. The wind averages 12.3 mph, most often from the west-northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 36°F | 30°F | 80% | 10.2 mph | 51% |
| 9 a.m. | 42°F | 32°F | 68% | 12.7 mph | 56% |
| noon | 50°F | 32°F | 50% | 15.1 mph | 50% |
| 3 p.m. | 54°F | 32°F | 43% | 15.7 mph | 52% |
| 6 p.m. | 51°F | 32°F | 47% | 13.8 mph | 50% |
| 9 p.m. | 44°F | 32°F | 63% | 10.6 mph | 61% |
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 March in Sioux City?
The March mean against the 1991-2020 normal of 36.7°F: 2021 42.6°F (+5.9), 2022 37.0°F (+0.3), 2023 33.0°F (−3.7), 2024 39.7°F (+3.0), 2025 42.7°F (+6.0), 2026 43.1°F (+6.4). 5 of 6 ran warmer than normal.
| March | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 42.6°F | +5.9°F | 3.62 in |
| 2022 | 37.0°F | +0.3°F | 1.87 in |
| 2023 | 33.0°F | −3.7°F | 1.20 in |
| 2024 | 39.7°F | +3.0°F | 2.83 in |
| 2025 | 42.7°F | +6.0°F | 2.95 in |
| 2026 | 43.1°F | +6.4°F | 1.67 in |
Source: records: ACIS, NWS threaded record SUXthr; recent months: ACIS, station USW00014943. Records and recent months use complete months only.
How does March in Sioux City compare across Iowa?
Across the 132 places PlainClimate covers in Iowa, March normal highs run from 38°F in Northwood to 52°F in Shenandoah; Sioux City's is 48°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.