Williston weather in August

In August, Williston sees average daytime highs of 80°F and overnight lows near 55°F, with 1.7 in of rain across 7.7 wet days and about 14.1 hours of daylight. It is the 2nd-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 81°F in the first days to 78°F by the end. The sky is clear or mostly clear about 52% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 h 54 min at the start of August to 13 h 18 min by month's end. Set against the rest of the year, August is Williston's 1st-clearest and 11th-windiest month. For the whole year in context, see Williston's year-round climate.

Daytime high
80°
2nd warmest
Overnight low
55°
11th coldest
Rainfall
1.7 in
7.7 wet days
Daylight
14 h 06 min
5:55 AM – 8:03 PM
Cloud cover
42%
1st clearest
Wind
9 mph
11th windiest
Solar energy
5.83 kWh/m²
Travel score
7.3
out of 10

Williston is city in and seat of Williams County, North Dakota, United States of America.

Density
1,377/km²
people per km²
Founded
1887

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 81°F in the first days to 78°F by the end.

A typical August day in Williston reaches about 80°F in the afternoon and slips back to 55°F overnight — a 25°F spread between the day's warmth and the night's chill. On most days the high lands between 69°F and 92°F. Set against its neighbours, August runs on par with July and about 11°F warmer than September.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
18257
28157
38157
48157
58157
68157
78157
88157
98157
108156
118156
128156
138156
148156
158156
168156
178155
188155
198055
208055
218055
228055
238055
248054
258054
267954
277954
287953
297853
307853
317752

How August really feels in Williston

Once humidity and wind are folded in, August averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Williston weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan20° / 0.64.24.58.60.0
Feb25° / 0.53.73.89.90.0
Mar37° / 19°0.95.3411.60.2
Apr53° / 31°1.57.12.813.43.1
May65° / 42°2.69.30.714.95.8
Jun73° / 53°3.110.7015.86.7
Jul80° / 58°2.38.2015.47.1
Aug80° / 55°1.77.7014.17.3
Sep70° / 46°1.75.8012.47.2
Oct54° / 33°1.35.91.510.63.6
Nov37° / 20°0.84.93.890.1
Dec24° / 0.64.74.98.20.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 30%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17426
27228
37228
47228
57228
67129
77129
87129
96931
106931
116931
126931
136931
146931
156931
167030
177030
187030
197030
207030
217030
227129
237129
247129
257129
267129
277129
286931
296931
306931
316832

Chance of precipitation in August

Any precipitation

Williston gets around 1.7 in of rain over 7.7 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 24% and peaks near 26% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
124
225
325
425
526
626
726
826
926
1026
1125
1225
1324
1424
1523
1623
1723
1823
1923
2023
2122
2222
2322
2422
2522
2622
2722
2821
2921
3021
3121

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the dry band about 69% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15728132
25727142
35727142
45727142
55827141
65927131
75927131
86026131
96026131
106225121
116225121
126424111
136424111
146623101
15692290
16692290
17712180
18722080
19732070
20741970
21751960
22761860
23761860
24781750
25791650
26791650
27801550
28801550
29811450
30821440
31831340

Wind in August

Winds average 9 mph in August.

Across August, daily wind ranges from about 8 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 54 min at the start of August to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 96 minutes over August. Sunrise moves from 5:34 AM to 6:16 AM, and sunset from 8:27 PM to 7:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.95:348:27
214.85:368:25
314.85:378:24
414.75:388:22
514.75:408:21
614.65:418:19
714.65:428:18
814.55:448:16
914.55:458:15
1014.45:468:13
1114.45:488:11
1214.35:498:10
1314.35:508:08
1414.25:528:06
1514.25:538:04
1614.15:558:03
1714.15:568:01
1814.05:577:59
1914.05:597:57
2013.96:007:55
2113.96:027:53
2213.86:037:51
2313.76:047:49
2413.76:067:47
2513.66:077:45
2613.66:097:43
2713.56:107:41
2813.56:127:39
2913.46:137:37
3013.36:147:35
3113.36:167:33

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.83 kWh/m².

For context, solar energy here swings from a low near 1.29 kWh/m² to a high of 6.84 kWh/m² in July across the year — August's 5.83 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.4Intense
26.4Intense
36.3Intense
46.3Intense
56.2Intense
66.2Intense
76.2Intense
86.1Intense
96.1Intense
106.1Intense
116.0Intense
126.0Intense
136.0Bright
145.9Bright
155.9Bright
165.9Bright
175.8Bright
185.8Bright
195.8Bright
205.7Bright
215.7Bright
225.6Bright
235.6Bright
245.5Bright
255.5Bright
265.5Bright
275.4Bright
285.3Bright
295.3Bright
305.2Bright
315.2Bright
Planning a trip in August

Is August a good time to visit Williston?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.3
Sightseeing
1st-best month of the year
7.3
Beach & pool
1st-best month of the year

August is one of the better times to visit Williston for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Williston in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, Williston sees daytime highs around 80°F and nights near 55°F. Worth packing: light clothes and sun protection. About 8 days see rain.

light clothessun protection

UV index in Williston in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Williston peaks around June 21 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 20 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 21UV 8Dec 20UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr4Moderate
May6High
Jun8Very high
Jul8Very high
Aug6High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Williston in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Williston is worst in August — around 16 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (October, 5 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1216 µg/m³Oct 226 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar12Good
Apr11Good
May11Good
Jun9Good
Jul14Moderate
Aug16Moderate
Sep10Good
Oct5Good
Nov6Good
Dec7Good
Location & terrain

Where is Williston?

Williston sits at 48.1°N, 103.6°W, 1,877 ft above sea level, in United States. The nearest listed city is Dickinson, 96 mi away.

Topography around Williston

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Williston.

Within 2 miles, the terrain around Williston has only modest variations in elevation — a maximum elevation change of 243 ft around an average of 1,867 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 650 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 912 ft.

The land around Williston is covered by grassland (42%) and artificial surfaces (28%) within 2 miles, grassland (61%) and cropland (25%) within 10 miles, and grassland (56%) and cropland (38%) within 50 miles.

2 miles
243 ft
10 miles
650 ft
50 miles
912 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Dickinson 96 mi · Minot 107 mi · Mandan 157 mi · Bismarck 162 mi · Arcola East 163 mi · Dewdney East 165 mi · Regina 165 mi · Moose Jaw 178 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Williston (48.147°, -103.618°, elevation 1,877 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).