Waukesha weather in April: Waukesha, Wisconsin: normal highs, lows, rain and records for April
Waukesha in April has a normal high of 55°F and a normal low of 35°F, a daily mean of 45°F, rising from 49°F on the 1st to 61°F by the 30th. Measurable precipitation falls on 11 days in a normal April, 3.65 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 13°C and low of 2°C, 93 mm of precipitation and 3 cm of snow in April.
- NOAA stationWaukesha Wastewater Treatment Plant
- Station IDUSC00478937
- Location43.01°N 88.25°W
- Elevation789 ft (241 m)
- Population71,461
- Jan 28° 12°
- Feb 32° 15°
- Mar 43° 24°
- Apr 55° 35°
- May 67° 46°
- Jun 77° 56°
- Jul 81° 60°
- Aug 80° 59°
- Sep 73° 51°
- Oct 60° 40°
- Nov 45° 28°
- Dec 33° 18°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Waukesha in April?
The normal high is 55°F and the normal low 35°F, for a daily mean of 45.1°F. April is 11.6°F warmer than March and 11.5°F cooler than May. April is the 7th warmest month of the year in Waukesha and the 5th wettest. Across the month the normal high rises 12°F, from 49°F on April 1 to 61°F on April 30. From one year to the next April's mean temperature typically moves about 3.2°F either way (NOAA's standard deviation), so roughly two Aprils in three average between 42°F and 48°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 40%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| April 1 | 49°F | 29°F | 30% | 19% |
| April 8 | 52°F | 32°F | 33% | 21% |
| April 15 | 55°F | 35°F | 36% | 23% |
| April 22 | 58°F | 38°F | 38% | 24% |
| April 30 | 61°F | 41°F | 40% | 25% |
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 | 49°F | 29°F | 30% | 19% | 12 h 40 min |
| April 2 | 50°F | 29°F | 31% | 19% | 12 h 40 min |
| April 3 | 50°F | 30°F | 31% | 19% | 12 h 50 min |
| April 4 | 51°F | 30°F | 32% | 20% | 12 h 50 min |
| April 5 | 51°F | 31°F | 32% | 20% | 12 h 50 min |
| April 6 | 51°F | 31°F | 32% | 20% | 13 h |
| April 7 | 52°F | 31°F | 33% | 21% | 13 h |
| April 8 | 52°F | 32°F | 33% | 21% | 13 h |
| April 9 | 53°F | 32°F | 34% | 21% | 13 h |
| April 10 | 53°F | 33°F | 34% | 21% | 13 h 10 min |
| April 11 | 53°F | 33°F | 35% | 22% | 13 h 10 min |
| April 12 | 54°F | 33°F | 35% | 22% | 13 h 10 min |
| April 13 | 54°F | 34°F | 35% | 22% | 13 h 20 min |
| April 14 | 55°F | 34°F | 36% | 22% | 13 h 20 min |
| April 15 | 55°F | 35°F | 36% | 23% | 13 h 20 min |
| April 16 | 56°F | 35°F | 37% | 23% | 13 h 20 min |
| April 17 | 56°F | 35°F | 37% | 23% | 13 h 30 min |
| April 18 | 56°F | 36°F | 37% | 23% | 13 h 30 min |
| April 19 | 57°F | 36°F | 37% | 24% | 13 h 30 min |
| April 20 | 57°F | 37°F | 38% | 24% | 13 h 30 min |
| April 21 | 58°F | 37°F | 38% | 24% | 13 h 40 min |
| April 22 | 58°F | 38°F | 38% | 24% | 13 h 40 min |
| April 23 | 59°F | 38°F | 38% | 24% | 13 h 40 min |
| April 24 | 59°F | 38°F | 39% | 24% | 13 h 50 min |
| April 25 | 59°F | 39°F | 39% | 24% | 13 h 50 min |
| April 26 | 60°F | 39°F | 39% | 25% | 13 h 50 min |
| April 27 | 60°F | 39°F | 39% | 25% | 13 h 50 min |
| April 28 | 61°F | 40°F | 39% | 25% | 14 h |
| April 29 | 61°F | 40°F | 39% | 25% | 14 h |
| April 30 | 61°F | 41°F | 40% | 25% | 14 h |
- Normal high
- 55°FApril average
- Normal low
- 35°FApril average
- Precipitation
- 3.65 inmonth total
- Days with precipitation
- 110.01 inch or more
- Snowfall
- 1.1 inmonth total
- Nights at 32°F or colder
- 10
- Daylight
- 12 h 40 min to 14 hApril 1 to April 30
- Days at 70°F or more
- 4
- Days at 80°F or more
- 1
- Sunshine
- 68%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00478937; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Waukesha in April?
On a given April day the chance of 0.01 inch or more is 36% on average, highest around April 30 (40%). In all, 3.65 in falls on 11 days of a normal April, 1 of them with an inch or more.
In a normal April in Waukesha, 10 nights fall to freezing and snowfall averages 1.1 inches.
Snow falls on 1 day 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 USC00478937.
What are the records for April in Waukesha?
The warmest April temperature on this station's record (since 1894) is 91°F, on April 22, 1980; the coldest is 7°F, on April 7, 1982. The wettest April brought 8.61 in (2026); the snowiest, 18.0 inches (1973).
The April mean against the 1991-2020 normal of 45.1°F: 2024 46.9°F (+1.8), 2025 44.9°F (−0.2), 2026 49.7°F (+4.6). 2 of 3 ran warmer than normal.
| April | Mean | Against normal | Precip. |
|---|---|---|---|
| 2024 | 46.9°F | +1.8°F | 4.82 in |
| 2025 | 44.9°F | −0.2°F | 3.44 in |
| 2026 | 49.7°F | +4.6°F | 8.61 in |
Source: records: ACIS, station USC00478937; recent months: ACIS, station USC00478937. Records and recent months use complete months only.
How does April in Waukesha compare across Wisconsin?
Across the 165 places PlainClimate covers in Wisconsin, April normal highs run from 46°F in Superior to 61°F in Boscobel; Waukesha's is 55°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.