Williston weather in May: Williston, North Dakota: normal highs, lows, rain and records for May
Williston in May has a normal high of 67°F and a normal low of 40°F, a daily mean of 54°F, rising from 62°F on the 1st to 72°F by the 31st. Measurable precipitation falls on 10 days in a normal May, 2.10 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 20°C and low of 5°C, 53 mm of precipitation and 2 cm of snow in May.
- NOAA stationWilliston Sloulin Field
- Station IDUSW00094014
- Location48.17°N 103.64°W
- Elevation1,902 ft (580 m)
- Population28,821
- Jan 22° 1°
- Feb 27° 6°
- Mar 40° 18°
- Apr 56° 29°
- May 67° 40°
- Jun 77° 50°
- Jul 85° 56°
- Aug 84° 54°
- Sep 73° 44°
- Oct 56° 30°
- Nov 38° 17°
- Dec 26° 6°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Williston in May?
The normal high is 67°F and the normal low 40°F, for a daily mean of 53.8°F. May is 11.4°F warmer than April and 9.7°F cooler than June. May is the 5th warmest month of the year in Williston and the 3rd wettest. Across the month the normal high rises 10°F, from 62°F on May 1 to 72°F on May 31. From one year to the next May's mean temperature typically moves about 2.6°F either way (NOAA's standard deviation), so roughly two Mays in three average between 51°F and 56°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 | 62°F | 34°F | 30% | 12% |
| May 8 | 65°F | 37°F | 32% | 15% |
| May 15 | 67°F | 40°F | 33% | 17% |
| May 22 | 70°F | 43°F | 35% | 19% |
| May 31 | 72°F | 46°F | 38% | 22% |
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 | 62°F | 34°F | 30% | 12% | 14 h 30 min |
| May 2 | 62°F | 35°F | 30% | 13% | 14 h 30 min |
| May 3 | 63°F | 35°F | 30% | 13% | 14 h 30 min |
| May 4 | 63°F | 36°F | 31% | 13% | 14 h 40 min |
| May 5 | 64°F | 36°F | 31% | 14% | 14 h 40 min |
| May 6 | 64°F | 36°F | 31% | 14% | 14 h 40 min |
| May 7 | 64°F | 37°F | 31% | 14% | 14 h 50 min |
| May 8 | 65°F | 37°F | 32% | 15% | 14 h 50 min |
| May 9 | 65°F | 38°F | 32% | 15% | 14 h 50 min |
| May 10 | 65°F | 38°F | 32% | 15% | 15 h |
| May 11 | 66°F | 38°F | 32% | 15% | 15 h |
| May 12 | 66°F | 39°F | 32% | 16% | 15 h |
| May 13 | 67°F | 39°F | 32% | 16% | 15 h |
| May 14 | 67°F | 39°F | 32% | 16% | 15 h 10 min |
| May 15 | 67°F | 40°F | 33% | 17% | 15 h 10 min |
| May 16 | 68°F | 40°F | 33% | 17% | 15 h 10 min |
| May 17 | 68°F | 41°F | 33% | 17% | 15 h 10 min |
| May 18 | 68°F | 41°F | 34% | 18% | 15 h 20 min |
| May 19 | 69°F | 41°F | 34% | 18% | 15 h 20 min |
| May 20 | 69°F | 42°F | 34% | 19% | 15 h 20 min |
| May 21 | 69°F | 42°F | 35% | 19% | 15 h 20 min |
| May 22 | 70°F | 43°F | 35% | 19% | 15 h 30 min |
| May 23 | 70°F | 43°F | 35% | 20% | 15 h 30 min |
| May 24 | 70°F | 43°F | 36% | 20% | 15 h 30 min |
| May 25 | 71°F | 44°F | 36% | 20% | 15 h 30 min |
| May 26 | 71°F | 44°F | 36% | 20% | 15 h 30 min |
| May 27 | 71°F | 44°F | 37% | 21% | 15 h 40 min |
| May 28 | 72°F | 45°F | 37% | 21% | 15 h 40 min |
| May 29 | 72°F | 45°F | 37% | 21% | 15 h 40 min |
| May 30 | 72°F | 46°F | 38% | 21% | 15 h 40 min |
| May 31 | 72°F | 46°F | 38% | 22% | 15 h 40 min |
- Normal high
- 67°FMay average
- Normal low
- 40°FMay average
- Precipitation
- 2.10 inmonth total
- Days with precipitation
- 100.01 inch or more
- Snowfall
- 0.9 inmonth total
- Nights at 32°F or colder
- 6
- Daylight
- 14 h 30 min to 15 h 40 minMay 1 to May 31
- Days at 70°F or more
- 14
- Days at 80°F or more
- 4
- Sunshine
- 74%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094014; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Williston in May?
On a given May day the chance of 0.01 inch or more is 33% on average, highest around May 31 (38%). In all, 2.10 in falls on 10 days of a normal May.
In a normal May in Williston, 6 nights fall to freezing and snowfall averages 0.9 inches.
Snow falls on 1 day in a normal May.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094014.
How humid and windy is Williston in May?
At 3 p.m. the normal temperature is 69°F with 42% relative humidity and a dew point of 45°F; at 6 a.m. it is 50°F with 83% humidity. The wind averages 9.7 mph, most often from the northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 50°F | 45°F | 83% | 6.8 mph | 55% |
| 9 a.m. | 59°F | 47°F | 64% | 10.6 mph | 57% |
| noon | 66°F | 46°F | 48% | 12.6 mph | 50% |
| 3 p.m. | 69°F | 45°F | 42% | 13.0 mph | 49% |
| 6 p.m. | 68°F | 45°F | 43% | 12.5 mph | 50% |
| 9 p.m. | 60°F | 46°F | 60% | 8.3 mph | 62% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00094014. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for May in Williston?
The warmest May temperature on Williston's official record (since 1894) is 106°F, on May 22, 1980; the coldest is 10°F, on May 3, 2005. The wettest May brought 7.38 in (1965); the snowiest, 15.5 inches (1983).
Source: records: ACIS, NWS threaded record ISNthr. Records and recent months use complete months only.
How does May in Williston compare across North Dakota?
Across the 92 places PlainClimate covers in North Dakota, May normal highs run from 62°F in Rolla to 71°F in Enderlin; Williston's is 67°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.