Mason City weather in April: Mason City, Iowa: normal highs, lows, rain and records for April
Mason City in April has a normal high of 58°F and a normal low of 35°F, a daily mean of 46°F, rising from 51°F on the 1st to 64°F by the 30th. Measurable precipitation falls on 12 days in a normal April, 4.15 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 14°C and low of 1°C, 105 mm of precipitation and 8 cm of snow in April.
- NOAA stationMason City Municipal Airport
- Station IDUSW00014940
- Location43.15°N 93.33°W
- Elevation1,225 ft (373 m)
- From the center6 miles
- Population26,948
- Jan 24° 7°
- Feb 29° 11°
- Mar 42° 24°
- Apr 58° 35°
- May 70° 47°
- Jun 80° 57°
- Jul 83° 61°
- Aug 80° 58°
- Sep 74° 49°
- Oct 60° 37°
- Nov 44° 24°
- Dec 30° 14°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Mason City in April?
The normal high is 58°F and the normal low 35°F, for a daily mean of 46.0°F. April is 13.1°F warmer than March and 12.2°F cooler than May. April is the 7th warmest month of the year in Mason City and the 4th wettest. Across the month the normal high rises 13°F, from 51°F on April 1 to 64°F on April 30. From one year to the next April's mean temperature typically moves about 3.5°F either way (NOAA's standard deviation), so roughly two Aprils in three average between 43°F and 50°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 42%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| April 1 | 51°F | 30°F | 35% | 21% |
| April 8 | 54°F | 32°F | 37% | 24% |
| April 15 | 58°F | 34°F | 39% | 25% |
| April 22 | 60°F | 37°F | 41% | 26% |
| April 30 | 64°F | 40°F | 42% | 27% |
Every day of April: normal high, low and chance of precipitation (warmest afternoon April 30, coldest night April 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| April 1 | 51°F | 30°F | 35% | 21% | 12 h 40 min |
| April 2 | 51°F | 30°F | 35% | 22% | 12 h 40 min |
| April 3 | 52°F | 30°F | 35% | 22% | 12 h 50 min |
| April 4 | 52°F | 31°F | 36% | 22% | 12 h 50 min |
| April 5 | 53°F | 31°F | 36% | 23% | 12 h 50 min |
| April 6 | 53°F | 31°F | 36% | 23% | 13 h |
| April 7 | 54°F | 31°F | 37% | 23% | 13 h |
| April 8 | 54°F | 32°F | 37% | 24% | 13 h |
| April 9 | 55°F | 32°F | 37% | 24% | 13 h |
| April 10 | 55°F | 33°F | 38% | 24% | 13 h 10 min |
| April 11 | 56°F | 33°F | 38% | 24% | 13 h 10 min |
| April 12 | 56°F | 33°F | 38% | 25% | 13 h 10 min |
| April 13 | 57°F | 34°F | 39% | 25% | 13 h 20 min |
| April 14 | 57°F | 34°F | 39% | 25% | 13 h 20 min |
| April 15 | 58°F | 34°F | 39% | 25% | 13 h 20 min |
| April 16 | 58°F | 35°F | 40% | 26% | 13 h 20 min |
| April 17 | 58°F | 35°F | 40% | 26% | 13 h 30 min |
| April 18 | 59°F | 35°F | 40% | 26% | 13 h 30 min |
| April 19 | 59°F | 36°F | 40% | 26% | 13 h 30 min |
| April 20 | 60°F | 36°F | 41% | 26% | 13 h 40 min |
| April 21 | 60°F | 36°F | 41% | 26% | 13 h 40 min |
| April 22 | 60°F | 37°F | 41% | 26% | 13 h 40 min |
| April 23 | 61°F | 37°F | 41% | 26% | 13 h 40 min |
| April 24 | 61°F | 38°F | 41% | 26% | 13 h 50 min |
| April 25 | 62°F | 38°F | 41% | 26% | 13 h 50 min |
| April 26 | 62°F | 38°F | 41% | 26% | 13 h 50 min |
| April 27 | 62°F | 39°F | 42% | 27% | 13 h 50 min |
| April 28 | 63°F | 39°F | 42% | 27% | 14 h |
| April 29 | 63°F | 40°F | 42% | 27% | 14 h |
| April 30 | 64°F | 40°F | 42% | 27% | 14 h |
- Normal high
- 58°FApril average
- Normal low
- 35°FApril average
- Precipitation
- 4.15 inmonth total
- Days with precipitation
- 120.01 inch or more
- Snowfall
- 3.0 inmonth total
- Nights at 32°F or colder
- 12
- Daylight
- 12 h 40 min to 14 hApril 1 to April 30
- Days at 70°F or more
- 6
- Days at 80°F or more
- 1
- Sunshine
- 69%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014940; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Mason City in April?
On a given April day the chance of 0.01 inch or more is 39% on average, highest around April 30 (42%). In all, 4.15 in falls on 12 days of a normal April, 1 of them with an inch or more.
In a normal April in Mason City, 12 nights fall to freezing, 1 days stay below freezing all day and snowfall averages 3.0 inches.
Snow falls on 2 days in a normal April, and an inch or more covers the ground on 1 day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014940.
How humid and windy is Mason City in April?
At 3 p.m. the normal temperature is 62°F with 45% relative humidity and a dew point of 40°F; at 6 a.m. it is 44°F with 81% humidity. The wind averages 12.7 mph, most often from the west in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 44°F | 38°F | 81% | 10.4 mph | 56% |
| 9 a.m. | 53°F | 40°F | 61% | 14.3 mph | 55% |
| noon | 59°F | 40°F | 49% | 15.5 mph | 48% |
| 3 p.m. | 62°F | 40°F | 45% | 16.1 mph | 44% |
| 6 p.m. | 59°F | 40°F | 49% | 14.3 mph | 44% |
| 9 p.m. | 51°F | 40°F | 67% | 10.3 mph | 55% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014940. 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 April in Mason City?
The warmest April temperature on this station's record (since 1948) is 93°F, on April 22, 1980; the coldest is 6°F, on April 6, 1982. The wettest April brought 8.24 in (2013); the snowiest, 26.9 inches (2018).
The April mean against the 1991-2020 normal of 46.0°F: 2021 48.0°F (+2.0), 2022 40.8°F (−5.2), 2023 46.3°F (+0.3), 2024 48.2°F (+2.2), 2025 47.2°F (+1.2), 2026 48.8°F (+2.8). 5 of 6 ran warmer than normal.
| April | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 48.0°F | +2.0°F | 0.59 in |
| 2022 | 40.8°F | −5.2°F | 5.75 in |
| 2023 | 46.3°F | +0.3°F | 2.76 in |
| 2024 | 48.2°F | +2.2°F | 4.37 in |
| 2025 | 47.2°F | +1.2°F | 4.61 in |
| 2026 | 48.8°F | +2.8°F | 3.16 in |
Source: records: ACIS, station USW00014940; recent months: ACIS, station USW00014940. Records and recent months use complete months only.
How does April in Mason City compare across Iowa?
Across the 132 places PlainClimate covers in Iowa, April normal highs run from 54°F in Northwood to 64°F in Glenwood; Mason City's is 58°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.