Lake Geneva weather in May: Lake Geneva, Wisconsin: normal highs, lows, rain and records for May
Lake Geneva in May has a normal high of 72°F and a normal low of 48°F, a daily mean of 60°F, rising from 67°F on the 1st to 76°F by the 31st. Measurable precipitation falls on 13 days in a normal May, 4.12 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 22°C and low of 9°C, 105 mm of precipitation in May.
- NOAA stationLake Geneva Wastewater Treatment Plant
- Station IDUSC00474457
- Location42.60°N 88.43°W
- Elevation846 ft (258 m)
- Population8,691
- Jan 30° 15°
- Feb 35° 17°
- Mar 45° 26°
- Apr 59° 37°
- May 72° 48°
- Jun 81° 58°
- Jul 86° 63°
- Aug 83° 61°
- Sep 76° 54°
- Oct 63° 42°
- Nov 47° 31°
- Dec 35° 21°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Lake Geneva in May?
The normal high is 72°F and the normal low 48°F, for a daily mean of 60.0°F. May is 11.9°F warmer than April and 9.6°F cooler than June. May is the 5th warmest month of the year in Lake Geneva and the 2nd wettest. Across the month the normal high rises 9°F, from 67°F on May 1 to 76°F on May 31. From one year to the next May's mean temperature typically moves about 3.1°F either way (NOAA's standard deviation), so roughly two Mays in three average between 57°F and 63°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 43%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 67°F | 43°F | 43% | 27% |
| May 8 | 69°F | 46°F | 43% | 28% |
| May 15 | 71°F | 48°F | 43% | 29% |
| May 22 | 74°F | 50°F | 43% | 29% |
| May 31 | 76°F | 53°F | 42% | 28% |
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 | 67°F | 43°F | 43% | 27% | 14 h |
| May 2 | 67°F | 44°F | 43% | 27% | 14 h |
| May 3 | 67°F | 44°F | 43% | 27% | 14 h 10 min |
| May 4 | 68°F | 44°F | 43% | 27% | 14 h 10 min |
| May 5 | 68°F | 45°F | 43% | 27% | 14 h 10 min |
| May 6 | 68°F | 45°F | 43% | 27% | 14 h 10 min |
| May 7 | 69°F | 46°F | 43% | 28% | 14 h 20 min |
| May 8 | 69°F | 46°F | 43% | 28% | 14 h 20 min |
| May 9 | 70°F | 46°F | 43% | 28% | 14 h 20 min |
| May 10 | 70°F | 47°F | 43% | 28% | 14 h 20 min |
| May 11 | 70°F | 47°F | 43% | 28% | 14 h 30 min |
| May 12 | 71°F | 47°F | 43% | 28% | 14 h 30 min |
| May 13 | 71°F | 48°F | 43% | 28% | 14 h 30 min |
| May 14 | 71°F | 48°F | 43% | 28% | 14 h 30 min |
| May 15 | 71°F | 48°F | 43% | 29% | 14 h 30 min |
| May 16 | 72°F | 49°F | 43% | 29% | 14 h 40 min |
| May 17 | 72°F | 49°F | 43% | 29% | 14 h 40 min |
| May 18 | 72°F | 49°F | 43% | 29% | 14 h 40 min |
| May 19 | 73°F | 49°F | 43% | 29% | 14 h 40 min |
| May 20 | 73°F | 50°F | 43% | 29% | 14 h 40 min |
| May 21 | 73°F | 50°F | 43% | 29% | 14 h 50 min |
| May 22 | 74°F | 50°F | 43% | 29% | 14 h 50 min |
| May 23 | 74°F | 51°F | 43% | 29% | 14 h 50 min |
| May 24 | 74°F | 51°F | 43% | 29% | 14 h 50 min |
| May 25 | 74°F | 51°F | 43% | 29% | 14 h 50 min |
| May 26 | 75°F | 52°F | 42% | 29% | 15 h |
| May 27 | 75°F | 52°F | 42% | 29% | 15 h |
| May 28 | 75°F | 52°F | 42% | 29% | 15 h |
| May 29 | 76°F | 53°F | 42% | 29% | 15 h |
| May 30 | 76°F | 53°F | 42% | 29% | 15 h |
| May 31 | 76°F | 53°F | 42% | 28% | 15 h |
- Normal high
- 72°FMay average
- Normal low
- 48°FMay average
- Precipitation
- 4.12 inmonth total
- Days with precipitation
- 130.01 inch or more
- Days at 90°F or more
- 1
- Nights at 32°F or colder
- 1
- Daylight
- 14 h to 15 hMay 1 to May 31
- Days at 70°F or more
- 17
- Days at 80°F or more
- 8
- Sunshine
- 70%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00474457; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Lake Geneva in May?
On a given May day the chance of 0.01 inch or more is 43% on average, highest around May 18 (43%). In all, 4.12 in falls on 13 days of a normal May, 1 of them with an inch or more.
In a normal May in Lake Geneva, 1 days reach 90°F and 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00474457.
What are the records for May in Lake Geneva?
The warmest May temperature on this station's record (since 1945) is 94°F, on May 22, 1956; the coldest is 26°F, on May 9, 1947. The wettest May brought 8.83 in (2019); the snowiest, 1.3 inches (1954).
The May mean against the 1991-2020 normal of 60.0°F: 2023 57.2°F (−2.8), 2024 59.8°F (−0.2), 2025 54.7°F (−5.3), 2026 56.8°F (−3.2). 0 of 4 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2023 | 57.2°F | −2.8°F | 1.62 in |
| 2024 | 59.8°F | −0.2°F | 5.53 in |
| 2025 | 54.7°F | −5.3°F | 2.95 in |
| 2026 | 56.8°F | −3.2°F | 0.76 in |
Source: records: ACIS, station USC00474457; recent months: ACIS, station USC00474457. Records and recent months use complete months only.
How does May in Lake Geneva 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; Lake Geneva's is 72°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.