Sister Bay, WI weather in May
In May, Sister Bay sees highs around 59°F and lows around 40°F: cool, with frequent rain. Rain falls on about 11 days. Good for outdoor plans.
- Normal high
- 59°F
- Normal low
- 40°F
- Wet days
- 11
- 3.0 in total
- Daylight
- 14.9 h
How May changes from start to finish
| May 1 | May 31 | |
|---|---|---|
| Normal high | 54°F | 65°F |
| Normal low | 35°F | 45°F |
| Chance of a wet day | 35% | 36% |
| Sunrise / sunset | 5:37 am / 7:54 pm | 5:04 am / 8:27 pm |
| Daylight | 14.3 h | 15.4 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
What kind of days to expect
- Comfortable dayshigh 65-80°F (temperature only: no humidity station nearby)8 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain (temperature and rain only)0 of 31
- Hot dayshigh 90°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow11 of 31
- Notable rainat least 0.10 in7 of 31
- Freezing nightslow 32°F or below2 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per May, counted from daily records for each year 1991-2020.
Rain in May
Normal precipitation is 3.0 in; a dry May brings about 2.2 in and a wet one about 3.6 in (25th and 75th percentiles). About 2 days bring half an inch or more. Snow is very rare.
How May varies from year to year
- Warmest May, 1991-20201998: average high 68°F
- Coolest May2002: average high 54°F
- Wettest May2019: 5.0 in
- Driest May2007: 1.5 in
- Highest reading85°F (May 19, 1998)
- Lowest reading22°F (May 9, 2020)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
May compared with April and June
| April | May | June | |
|---|---|---|---|
| Normal high | 47°F | 59°F | 70°F |
| Normal low | 30°F | 40°F | 50°F |
| Wet days | 10 | 11 | 10 |
| Comfortable days | 1 | 8 | 22 |
| Daylight | 13.5 h | 14.9 h | 15.6 h |
Highs change by +12°F from April and +11°F into June.
Nearby alternatives in May
- Warmer: Green Bay, WI64 mi · high 67°F · 12 wet days
How Sister Bay ranks in May
- Normal high367th warmest of 378 cities; 5th of 5 in Wisconsin
- Wet days245th driest of 378
What to pack for Sister Bay in May
- A warm jacket – lows near 40°F, highs near 59°F
- A rain jacket or umbrella – rain on about 11 days
Frost in May
The last spring frost typically comes around May 14; in 1 year in 10 it comes after May 28. All frost dates for Sister Bay.
Heating and cooling
May has 478 heating degree days and 1 cooling degree days (base 65°F), 6% of the year's total heating and cooling demand.
Questions
How cold is Sister Bay in May?
The normal high is 59°F and the normal low is 40°F. From 1991 to 2020 the coldest May reading was 22°F (most recently on May 9, 2020).
Does it rain a lot in Sister Bay in May?
About 11 days in May have at least 0.01 in of precipitation, and the normal total is 3.0 in. The wettest May in 1991-2020 was in 2019 (5.0 in); the driest was in 2007 (1.5 in).
Does it snow in Sister Bay in May?
Snow is very rare: the 1991-2020 normal for May rounds to 0.0 in.
Is May a good time to visit Sister Bay?
May ranks 5th of 12 months on our comfort score for Sister Bay (64 out of 100). It has about 8 comfortable days (judged by temperature only). The best months are June, July and August.
Where the numbers come from
- Temperature, rain and snowfall: Washington Is (USC00478905), 16 mi NE of the city center, 686 ft (73 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Snow depth: Sturgeon Bay Exp Farm (USC00478267), 24 mi SSW of the city center, 699 ft (86 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: Ephraim 1NE-Wwtp (USC00472626), 2.0 mi SW of the city center, 733 ft (120 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Not available for this location: humidity and wind by hour, cloud cover and daily humidity and wind (no station close enough or similar enough in elevation).