Williston, North Dakota Weather
Thunder stills across the plains. Day 93 of summer. Read this microseason across nine climate regions →
Williston weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 9:23 AM CDT · Open-Meteo
- TodaySep 21Clear——66°49°—
- TuesdaySep 22Clear——65°48°-1°
- WednesdaySep 23Overcast18%—72°57°+7°
- ThursdaySep 24Clear——84°58°+12°
- FridaySep 25Overcast——81°59°-3°
- SaturdaySep 26Overcast——68°52°-13°
- SundaySep 27Light Drizzle11%—69°47°+1°
Air quality now AQI 35 · Good
AQI 35 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 8.0 µg/m³ (AQI 44) with a 1.00 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in stagnant air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 8.0 µg/m³ (AQI 44) with a 1.00 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 1.00
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
September dries up ditches or breaks down bridges.
- Moonrise
- 5:55 PM
- Moonset
- 1:46 AM
- In sign
- ♑︎ Capricorn
Thunder stills across the plains
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Williston at a glance
- Today vs. normal: Today averages 58°F (high 66°F, low 49°F), 3°F above the 55°F normal for Sep 21
- Last frost: May 21 (1991–2020 median, NOAA station 1 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots
16-Day Forecast — Williston
- Mon66°49°1%
- Tue65°48°0%
- Wed72°57°18%
- Thu84°58°3%
- Fri81°59°7%
- Sat68°52°8%
- Sun69°47°11%
- Mon67°55°25%
- Tue56°46°14%
- Wed62°43°4%
- Thu68°46°6%
- Fri63°49°14%
- Sat52°44°14%
- Sun55°37°9%
- Mon67°40°10%
- Tue65°50°3%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Post-frost dormancy
As of September 21, the season's first frost (typically September 21) is due or past. Bring frost-tender plants indoors, mulch overwintering beds, and turn spent plantings under. This city's planting calendar for September: plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, and carrots.
Sun & seasons in Williston
Williston sits in Williams County, where the year’s longest day runs 16h 4m of daylight and its shortest just 8h 20m — a swing of +7h 44m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Fargo, the state’s largest city, lies about 330 miles to the ESE. The nearest town Williston tracks is Hillsboro, roughly 310 miles to the E.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes | radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| July | beans, squash, fall brassicas, carrots | lettuce, peas, spinach, radishes, summer squash |
| August | garlic (overwinter) | lettuce, peas, tomatoes, peppers, beans, summer squash, garlic |
| September | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| October | — | fall brassicas, carrots |
A year in weather
Williston's warmest month is July (~70°F mean) and its coldest is January (~12°F). Rainfall peaks in June (2.6 inches) and bottoms out in February (0.5 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 12° | 0.6″ | 8 |
| February | 16° | 0.5″ | 7 |
| March | 29° | 0.6″ | 7 |
| April | 42° | 1.1″ | 8 |
| May | 54° | 2.1″ | 10 |
| June | 64° | 2.6″ | 12 |
| July | 70° | 2.5″ | 9 |
| August | 69° | 1.6″ | 9 |
| September | 58° | 1.4″ | 8 |
| October | 43° | 0.9″ | 7 |
| November | 28° | 0.7″ | 7 |
| December | 16° | 0.6″ | 9 |
Regional context
Similar climates Springbrook, ND, Trenton, ND, Epping, ND
By the nearest station's NOAA NCEI 1991-2020 normals, Williston sees 12°F Januarys and 70°F Julys, a 59°F range, plus around 15.1 inches of precipitation across 100 days.
Precipitation in Williston runs summer-dominant: June averages 2.6 inches across 12.3 days of warm-season storms, while February drops to 0.5 inches over 7.1 rainy days of drier cool air. Williston shares that warm-season-wet pattern with places like Springbrook, ND, Trenton, ND and Epping, ND.
By May 21 the frosts ease in Williston, opening the season for kale, peas, spinach, and parsnips. In Williston, warm-season transplants — tomatoes, peppers, basil — wait two weeks past Williston's frost date. Around September 21, freezing nights resume in Williston and tender crops must come in. In about half of years, Williston's last freeze comes after May 21.
Similar climates: Springbrook, ND, Trenton, ND, Epping, ND, Blacktail, ND, Long Creek, ND.
Frequently asked
- When does it freeze in Williston?
- In Williston, expect the last spring frost near May 21; Williston's first autumn frost comes around September 21.
- What is the rainy season in Williston?
- June is the wettest month in Williston, about 2.6 inches on average; the year totals roughly 15 inches.
- What is the warmest month in Williston?
- Williston peaks in July, when the mean runs near 70°F.
- What is the coldest month in Williston?
- January is Williston's coldest month, averaging about 12°F.
- When can I start a vegetable garden in Williston?
- In Williston, sow peas and hardy greens around May 21; Williston's tomatoes and peppers wait two weeks more.
- How many rainy days does Williston get?
- Williston records around 100 days of measurable precipitation annually.
- What hardiness zone is Williston?
- Because Williston bottoms near 12°F in January, that winter low sets Williston's USDA zone — verify by ZIP.
- What is the 10-day forecast for Williston?
- Williston's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Williston?
- See this week's day-by-day rain chances for Williston in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Williston?
- Current conditions for Williston and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Williston forecast updated?
- The Williston forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Williston?
- Today's sunrise and sunset times for Williston are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Williston?
- The next few days in Williston's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Williston sits at 48.2°N; its climate zone is warm-summer humid continental (Köppen approximation).
ZIP codes in Williston
- 58801
- 58802
- 58803