Superior weather in May: Superior, Wisconsin: normal highs, lows, rain and records for May
Superior in May has a normal high of 57°F and a normal low of 41°F, a daily mean of 49°F, rising from 52°F on the 1st to 62°F by the 31st. Measurable precipitation falls on 12 days in a normal May, 3.37 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 14°C and low of 5°C, 86 mm of precipitation in May.
- NOAA stationSuperior
- Station IDUSC00478349
- Location46.73°N 92.07°W
- Elevation607 ft (185 m)
- Population26,620
- Jan 23° 6°
- Feb 27° 9°
- Mar 36° 21°
- Apr 46° 32°
- May 57° 41°
- Jun 67° 50°
- Jul 76° 58°
- Aug 75° 58°
- Sep 67° 50°
- Oct 53° 39°
- Nov 39° 26°
- Dec 27° 13°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Superior in May?
The normal high is 57°F and the normal low 41°F, for a daily mean of 49.1°F. May is 10.2°F warmer than April and 9.1°F cooler than June. May is the 5th warmest month of the year in Superior and the 5th wettest. Across the month the normal high rises 10°F, from 52°F on May 1 to 62°F on May 31. From one year to the next May's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Mays in three average between 47°F and 51°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 38%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 52°F | 37°F | 34% | 22% |
| May 8 | 55°F | 39°F | 36% | 23% |
| May 15 | 57°F | 41°F | 37% | 24% |
| May 22 | 59°F | 43°F | 38% | 25% |
| May 31 | 62°F | 45°F | 38% | 25% |
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 | 52°F | 37°F | 34% | 22% | 14 h 20 min |
| May 2 | 53°F | 37°F | 34% | 22% | 14 h 20 min |
| May 3 | 53°F | 37°F | 34% | 22% | 14 h 30 min |
| May 4 | 54°F | 38°F | 35% | 22% | 14 h 30 min |
| May 5 | 54°F | 38°F | 35% | 23% | 14 h 30 min |
| May 6 | 54°F | 38°F | 35% | 23% | 14 h 40 min |
| May 7 | 55°F | 39°F | 36% | 23% | 14 h 40 min |
| May 8 | 55°F | 39°F | 36% | 23% | 14 h 40 min |
| May 9 | 55°F | 39°F | 36% | 23% | 14 h 40 min |
| May 10 | 56°F | 39°F | 36% | 23% | 14 h 50 min |
| May 11 | 56°F | 40°F | 36% | 24% | 14 h 50 min |
| May 12 | 56°F | 40°F | 37% | 24% | 14 h 50 min |
| May 13 | 57°F | 40°F | 37% | 24% | 14 h 50 min |
| May 14 | 57°F | 41°F | 37% | 24% | 15 h |
| May 15 | 57°F | 41°F | 37% | 24% | 15 h |
| May 16 | 58°F | 41°F | 37% | 24% | 15 h |
| May 17 | 58°F | 41°F | 37% | 24% | 15 h |
| May 18 | 58°F | 42°F | 37% | 24% | 15 h 10 min |
| May 19 | 59°F | 42°F | 37% | 24% | 15 h 10 min |
| May 20 | 59°F | 42°F | 37% | 24% | 15 h 10 min |
| May 21 | 59°F | 42°F | 38% | 24% | 15 h 10 min |
| May 22 | 59°F | 43°F | 38% | 25% | 15 h 20 min |
| May 23 | 60°F | 43°F | 38% | 25% | 15 h 20 min |
| May 24 | 60°F | 43°F | 38% | 25% | 15 h 20 min |
| May 25 | 60°F | 43°F | 38% | 25% | 15 h 20 min |
| May 26 | 60°F | 44°F | 38% | 25% | 15 h 20 min |
| May 27 | 61°F | 44°F | 38% | 25% | 15 h 30 min |
| May 28 | 61°F | 44°F | 38% | 25% | 15 h 30 min |
| May 29 | 61°F | 44°F | 38% | 25% | 15 h 30 min |
| May 30 | 62°F | 45°F | 38% | 25% | 15 h 30 min |
| May 31 | 62°F | 45°F | 38% | 25% | 15 h 30 min |
- Normal high
- 57°FMay average
- Normal low
- 41°FMay average
- Precipitation
- 3.37 inmonth total
- Days with precipitation
- 120.01 inch or more
- Nights at 32°F or colder
- 2
- Daylight
- 14 h 20 min to 15 h 30 minMay 1 to May 31
- Days at 70°F or more
- 5
- Days at 80°F or more
- 2
- Sunshine
- 68%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00478349; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Superior in May?
On a given May day the chance of 0.01 inch or more is 37% on average, highest around May 31 (38%). In all, 3.37 in falls on 12 days of a normal May, 1 of them with an inch or more.
In a normal May in Superior, 2 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00478349.
What are the records for May in Superior?
The warmest May temperature on this station's record (since 1909) is 96°F, on May 31, 1939; the coldest is 11°F, on May 3, 1967. The wettest May brought 8.22 in (2012); the snowiest, 5.0 inches (1954).
The May mean against the 1991-2020 normal of 49.1°F: 2021 51.7°F (+2.6), 2022 48.4°F (−0.7), 2023 48.3°F (−0.8), 2024 51.5°F (+2.4), 2025 50.2°F (+1.1), 2026 47.2°F (−1.9). 3 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 51.7°F | +2.6°F | 1.47 in |
| 2022 | 48.4°F | −0.7°F | 4.25 in |
| 2023 | 48.3°F | −0.8°F | 0.46 in |
| 2024 | 51.5°F | +2.4°F | 3.88 in |
| 2025 | 50.2°F | +1.1°F | 1.34 in |
| 2026 | 47.2°F | −1.9°F | 1.47 in |
Source: records: ACIS, station USC00478349; recent months: ACIS, station USC00478349. Records and recent months use complete months only.
How does May in Superior 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; Superior's is 57°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.