West Allis weather in May: West Allis, Wisconsin: normal highs, lows, rain and records for May
West Allis in May has a normal high of 70°F and a normal low of 48°F, a daily mean of 59°F, rising from 64°F on the 1st to 75°F by the 31st. Measurable precipitation falls on 14 days in a normal May, 4.32 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 21°C and low of 9°C, 110 mm of precipitation in May.
- NOAA stationWest Allis
- Station IDUSC00479046
- Location43.02°N 88.00°W
- Elevation723 ft (220 m)
- From the center2 miles
- Population59,784
- Jan 31° 15°
- Feb 34° 17°
- Mar 45° 27°
- Apr 57° 37°
- May 70° 48°
- Jun 80° 58°
- Jul 85° 63°
- Aug 83° 62°
- Sep 77° 54°
- Oct 62° 42°
- Nov 48° 30°
- Dec 36° 21°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is West Allis in May?
The normal high is 70°F and the normal low 48°F, for a daily mean of 58.7°F. May is 12.1°F warmer than April and 10.3°F cooler than June. May is the 5th warmest month of the year in West Allis and the 3rd wettest. Across the month the normal high rises 11°F, from 64°F on May 1 to 75°F on May 31. From one year to the next May's mean temperature typically moves about 3.7°F either way (NOAA's standard deviation), so roughly two Mays in three average between 55°F and 62°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 45%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 64°F | 43°F | 41% | 24% |
| May 8 | 67°F | 45°F | 44% | 25% |
| May 15 | 70°F | 47°F | 45% | 26% |
| May 22 | 72°F | 50°F | 45% | 26% |
| May 31 | 75°F | 53°F | 44% | 26% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 64°F | 43°F | 41% | 24% | 14 h |
| May 2 | 64°F | 43°F | 42% | 24% | 14 h 10 min |
| May 3 | 65°F | 43°F | 42% | 24% | 14 h 10 min |
| May 4 | 65°F | 44°F | 42% | 24% | 14 h 10 min |
| May 5 | 66°F | 44°F | 42% | 25% | 14 h 10 min |
| May 6 | 66°F | 44°F | 43% | 25% | 14 h 20 min |
| May 7 | 67°F | 45°F | 43% | 25% | 14 h 20 min |
| May 8 | 67°F | 45°F | 44% | 25% | 14 h 20 min |
| May 9 | 67°F | 45°F | 44% | 26% | 14 h 20 min |
| May 10 | 68°F | 46°F | 44% | 26% | 14 h 30 min |
| May 11 | 68°F | 46°F | 45% | 26% | 14 h 30 min |
| May 12 | 69°F | 46°F | 45% | 26% | 14 h 30 min |
| May 13 | 69°F | 47°F | 45% | 26% | 14 h 30 min |
| May 14 | 69°F | 47°F | 45% | 26% | 14 h 40 min |
| May 15 | 70°F | 47°F | 45% | 26% | 14 h 40 min |
| May 16 | 70°F | 48°F | 45% | 26% | 14 h 40 min |
| May 17 | 70°F | 48°F | 45% | 26% | 14 h 40 min |
| May 18 | 71°F | 48°F | 45% | 26% | 14 h 40 min |
| May 19 | 71°F | 49°F | 45% | 26% | 14 h 50 min |
| May 20 | 71°F | 49°F | 45% | 26% | 14 h 50 min |
| May 21 | 72°F | 49°F | 45% | 26% | 14 h 50 min |
| May 22 | 72°F | 50°F | 45% | 26% | 14 h 50 min |
| May 23 | 72°F | 50°F | 45% | 26% | 14 h 50 min |
| May 24 | 73°F | 50°F | 45% | 26% | 14 h 50 min |
| May 25 | 73°F | 51°F | 45% | 26% | 15 h |
| May 26 | 73°F | 51°F | 45% | 26% | 15 h |
| May 27 | 74°F | 51°F | 45% | 26% | 15 h |
| May 28 | 74°F | 52°F | 45% | 26% | 15 h |
| May 29 | 74°F | 52°F | 44% | 26% | 15 h |
| May 30 | 75°F | 52°F | 44% | 26% | 15 h |
| May 31 | 75°F | 53°F | 44% | 26% | 15 h 10 min |
- Normal high
- 70°FMay average
- Normal low
- 48°FMay average
- Precipitation
- 4.32 inmonth total
- Days with precipitation
- 140.01 inch or more
- Days at 90°F or more
- 1
- Nights at 32°F or colder
- 1
- Daylight
- 14 h to 15 h 10 minMay 1 to May 31
- Days at 70°F or more
- 15
- Days at 80°F or more
- 6
- Sunshine
- 71%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00479046; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in West Allis in May?
On a given May day the chance of 0.01 inch or more is 44% on average, highest around May 14 (45%). In all, 4.32 in falls on 14 days of a normal May, 1 of them with an inch or more.
In a normal May in West Allis, 1 days reach 90°F and 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00479046.
What are the records for May in West Allis?
The warmest May temperature on this station's record (since 1948) is 95°F, on May 19, 1975; the coldest is 26°F, on May 9, 1966. The wettest May brought 9.32 in (2004).
The May mean against the 1991-2020 normal of 58.7°F: 2023 58.5°F (−0.2), 2024 61.1°F (+2.4), 2025 54.7°F (−4.0), 2026 57.5°F (−1.2). 1 of 4 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2023 | 58.5°F | −0.2°F | 1.25 in |
| 2024 | 61.1°F | +2.4°F | 6.64 in |
| 2025 | 54.7°F | −4.0°F | 4.44 in |
| 2026 | 57.5°F | −1.2°F | 0.40 in |
Source: records: ACIS, station USC00479046; recent months: ACIS, station USC00479046. Records and recent months use complete months only.
How does May in West Allis compare across Wisconsin?
Across the 165 places PlainClimate covers in Wisconsin, May normal highs run from 57°F in Superior to 73°F in Mondovi; West Allis's is 70°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.