Climate Comfort Score
39/100
Below Average
NOAA 1991–2020 normals 42°F annual avg Public-domain federal data
Williston Sloulin, ND Climate
Average temperature, precipitation, and a comfort score, drawn from NOAA NCEI 1991–2020 normals →
- 42°F
- Avg annual temp
- 39/100
- Comfort score
- 15.1"
- Annual precip
- 123d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Williston Sloulin
Williston Sloulin, North Dakota averages 42°F a year and scores 39/100 on the comfort index - below average, milder than 4% of U.S. cities.
- 42°F
- average temperature, NOAA 1991-2020 normal
- 39/100
- comfort score, milder than 4% of U.S. cities
- 15.1"
- annual precipitation · 48" snow
- 123 days
- growing season, frost-free days
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
42°F (5°C)
Avg High
54°F
Avg Low
29°F
Annual Precip
15.1"
Annual Snow
48.2"
Comfort Score
39/100
Below Average
Avg Annual Temperature
42°F
30-year mean (NOAA NCEI)
Annual Precipitation
15.1"
Plus 48.2" of snow
Comfort score vs national 100-point ceiling (Williston Sloulin) 39.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Below Average for the Williston Sloulin area.
How Williston Sloulin compares to every U.S. city
Williston Sloulin's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
39 Top 96% higher than 4% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Williston Sloulin
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Williston Sloulin captures average conditions across the spread shown, the most recent decade is warmer than the 30-year mean.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 22°F (-5°C) | 1°F (-17°C) | 12°F (-11°C) | 0.6" | 11.2" | 30.8 | 0.0 |
| February | 27°F (-3°C) | 6°F (-15°C) | 16°F (-9°C) | 0.5" | 6.7" | 27.7 | 0.0 |
| March | 40°F (5°C) | 18°F (-8°C) | 29°F (-2°C) | 0.6" | 6.4" | 28.6 | 0.0 |
| April | 56°F (13°C) | 29°F (-2°C) | 42°F (6°C) | 1.1" | 3.7" | 18.7 | 0.1 |
| May | 67°F (20°C) | 40°F (5°C) | 54°F (12°C) | 2.1" | 0.9" | 6.1 | 0.3 |
| June | 77°F (25°C) | 50°F (10°C) | 64°F (18°C) | 2.6" | 0.0" | 0.3 | 2.1 |
| July | 85°F (29°C) | 56°F (13°C) | 70°F (21°C) | 2.5" | 0.0" | 0.0 | 8.2 |
| August | 84°F (29°C) | 54°F (12°C) | 69°F (21°C) | 1.6" | 0.0" | 0.0 | 8.5 |
| September | 73°F (23°C) | 44°F (6°C) | 58°F (14°C) | 1.4" | 0.0" | 2.7 | 2.1 |
| October | 56°F (13°C) | 30°F (-1°C) | 43°F (6°C) | 0.9" | 2.6" | 17.0 | 0.1 |
| November | 38°F (4°C) | 17°F (-8°C) | 28°F (-2°C) | 0.7" | 6.3" | 28.4 | 0.0 |
| December | 26°F (-3°C) | 6°F (-14°C) | 16°F (-9°C) | 0.6" | 10.4" | 30.9 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 0.6"
Snow: 11.2"
7.6 days with precipitation
February 0.5"
Snow: 6.7"
7.1 days with precipitation
March 0.6"
Snow: 6.4"
7.4 days with precipitation
April 1.1"
Snow: 3.7"
8.3 days with precipitation
May 2.1"
Snow: 0.9"
9.9 days with precipitation
June 2.6"
12.3 days with precipitation
July 2.5"
9.2 days with precipitation
August 1.6"
8.7 days with precipitation
September 1.4"
7.5 days with precipitation
October 0.9"
Snow: 2.6"
6.9 days with precipitation
November 0.7"
Snow: 6.3"
6.8 days with precipitation
December 0.6"
Snow: 10.4"
8.5 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
September 21
50% probability date
Last Spring Freeze
May 21
50% probability date
Growing Season
123 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,906
Higher = more heating needed
Cooling Degree Days
457
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 78% | 8.3 | 50% | 32% |
| February | 76% | 8.7 | 45% | 36% |
| March | 63% | 9.9 | 49% | 29% |
| April | 56% | 10.5 | 47% | 27% |
| May | 61% | 9.7 | 47% | 25% |
| June | 62% | 8.8 | 60% | 13% |
| July | 58% | 7.9 | 69% | 8% |
| August | 57% | 8.2 | 68% | 12% |
| September | 61% | 8.6 | 64% | 18% |
| October | 69% | 9.3 | 52% | 32% |
| November | 77% | 8.2 | 48% | 37% |
| December | 78% | 8.2 | 49% | 36% |
What Williston Sloulin's climate means for you
Williston Sloulin runs 42°F a year - peaking in July, coldest in January.
- Gardeners get about 123 frost-free days, with the last spring freeze near May 21 - plan the planting calendar around it, not the regional average.
- Energy bills track 8,906 heating and 457 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Williston Sloulin, ND
Williston Sloulin, North Dakota runs an annual average of 42°F, ranging from a mean daily high of 54°F to a mean daily low of 29°F, per NOAA's 1991–2020 climate normals. July is typically the warmest month of the year, while January is the coldest. Drawn from station USW00094014, these thirty-year averages smooth out year-to-year swings into a baseline for what a typical month looks like here.
Anyone planning to live, garden, or travel in Williston Sloulin should weigh precipitation alongside temperature: the annual average runs 15.1 inches, with 48.2 inches typically falling as snow. The frost-free season averages 123 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 21 and the first fall freeze near September 21. And on the energy front, 8,906 heating degree days and 457 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Williston Sloulin scores 39/100 (Below Average), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Shoulder seasons bring the mildest highs and lows in the monthly tables above, summer brings July-driven heat, and winter brings January-driven cold - use that rhythm for planning. These figures are thirty-year averages rather than forecasts, so a specific year may still run warmer, cooler, wetter, or drier than what's shown.
Frequently Asked Questions
What is the average temperature in Williston Sloulin, ND? ▼
The average annual temperature in Williston Sloulin, North Dakota is 42°F. The warmest month averages 85°F (29°C) and the coldest averages 1°F (-17°C).
How much rain does Williston Sloulin get? ▼
Williston Sloulin receives 15.1 inches of precipitation annually, including 48.2 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Williston Sloulin? ▼
Williston Sloulin has a climate comfort score of 39/100 (Below Average), milder than 4% of U.S. cities in the PlainClimate database.
When is the growing season in Williston Sloulin? ▼
Williston Sloulin has approximately 123 frost-free days per year, with the last spring freeze around May 21 and the first fall freeze around September 21.
How much energy does heating and cooling require in Williston Sloulin? ▼
Williston Sloulin has 8,906 heating degree days and 457 cooling degree days annually, a heating-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Williston Sloulin climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USW00094014 near Williston Sloulin.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00094014. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.