Grand Forks weather in August

In August, Grand Forks sees average daytime highs of 78°F and overnight lows near 56°F, with 3.1 in of rain across 9.2 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 79°F in the first days to 76°F by the end. The sky is clear or mostly clear about 46% 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 Grand Forks's 1st-clearest and 11th-windiest month. For the whole year in context, see Grand Forks's year-round climate.

Daytime high
78°
2nd warmest
Overnight low
56°
11th coldest
Rainfall
3.1 in
9.2 wet days
Daylight
14 h 06 min
5:29 AM – 7:36 PM
Cloud cover
47%
1st clearest
Wind
7 mph
11th windiest
Solar energy
5.49 kWh/m²
Travel score
7.1
out of 10

Grand Forks is city in North Dakota, United States.

Density
810/km²
people per km²
Founded
1870

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 79°F in the first days to 76°F by the end.

A typical August day in Grand Forks reaches about 78°F in the afternoon and slips back to 56°F overnight — a 22°F spread between the day's warmth and the night's chill. On most days the high lands between 69°F and 87°F. Set against its neighbours, August runs on par with July and about 10°F warmer than September.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
18058
27958
37958
47958
57958
67958
77958
87958
97957
107957
117957
127957
137957
147857
157857
167856
177856
187856
197856
207856
217856
227856
237856
247755
257755
267755
277755
287655
297654
307654
317554

How August really feels in Grand Forks

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.

Grand Forks 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
Jan16° / -1°0.75.15.38.60.0
Feb21° / 0.63.94.29.90.0
Mar35° / 17°1.264.211.60.1
Apr52° / 32°1.77.42.113.42.9
May66° / 45°3.411.20.214.95.7
Jun75° / 56°4.112.2015.76.5
Jul79° / 59°3.510.1015.46.8
Aug78° / 56°3.19.2014.17.1
Sep68° / 47°2.78012.46.6
Oct53° / 35°2.37.91.310.63.1
Nov35° / 20°1.15.44.190.0
Dec21° / 1.05.96.48.30.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of August, with mostly cloudy or overcast conditions the remaining 38%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26436
36337
46337
56238
66238
76139
86139
96139
106238
116139
126139
136139
146139
156238
166238
176238
186238
196238
206238
216238
226238
236238
246238
256238
266238
276139
286139
296139
306040
316040

Chance of precipitation in August

Any precipitation

Grand Forks gets around 3.1 in of rain over 9.2 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 30% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
126
227
327
427
528
628
729
829
930
1030
1130
1230
1330
1430
1530
1630
1730
1830
1930
2030
2130
2230
2330
2430
2530
2630
2731
2831
2931
3031
3131

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 43% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
134302592
234302592
335292592
436292582
537282582
637282582
738282482
838272482
939272481
1039272481
1140272481
1240272481
1341262481
1441262481
1542262481
1642262481
1743262470
1843262470
1943262470
2043262470
2144262370
2245262370
2345252370
2446252260
2547252160
2648242160
2750242060
2851241960
2952241860
3054231760
3156231650

Wind in August

Winds average 7 mph in August.

Across August, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light 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 5:09 AM to 5:50 AM, and sunset from 8:00 PM to 7:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.95:098:00
214.85:107:58
314.85:117:57
414.75:137:55
514.75:147:54
614.65:157:52
714.65:167:51
814.55:187:49
914.55:197:48
1014.45:217:46
1114.45:227:44
1214.35:237:43
1314.35:257:41
1414.25:267:39
1514.25:277:37
1614.15:297:36
1714.15:307:34
1814.05:327:32
1914.05:337:30
2013.95:347:28
2113.85:367:26
2213.85:377:25
2313.75:397:23
2413.75:407:21
2513.65:417:19
2613.65:437:17
2713.55:447:15
2813.55:467:13
2913.45:477:11
3013.35:487:09
3113.35:507:07

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.49 kWh/m².

For context, solar energy here swings from a low near 1.21 kWh/m² to a high of 6.23 kWh/m² in July across the year — August's 5.49 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Bright
46.0Bright
55.9Bright
65.9Bright
75.8Bright
85.8Bright
95.8Bright
105.7Bright
115.7Bright
125.6Bright
135.6Bright
145.6Bright
155.5Bright
165.5Bright
175.5Bright
185.4Bright
195.4Bright
205.3Bright
215.3Bright
225.3Bright
235.2Bright
245.2Bright
255.1Bright
265.1Bright
275.0Bright
285.0Bright
294.9Bright
304.8Bright
314.8Bright
Planning a trip in August

Hazard calendar for Grand Forks

In seasonPeak

In August, Grand Forks sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Grand Forks's rainy season runs May–October, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Grand Forks?

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

7.1
Sightseeing
1st-best month of the year
6.6
Beach & pool
1st-best month of the year

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

What to pack for Grand Forks in August

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

In August, Grand Forks sees daytime highs around 78°F and nights near 56°F. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Grand Forks in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Grand Forks peaks around June 19 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 19UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May5High
Jun8Very high
Jul7High
Aug7High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Grand Forks 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 Grand Forks is worst in August — around 16 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (October, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodAug 916 µg/m³Oct 216 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar14Moderate
Apr12Good
May11Good
Jun11Good
Jul16Moderate
Aug16Moderate
Sep10Good
Oct6Good
Nov7Good
Dec8Good
Location & terrain

Where is Grand Forks?

Grand Forks sits at 47.9°N, 97.0°W, 830 ft above sea level, in United States. The nearest listed city is West Fargo, 73 mi away.

Topography around Grand Forks

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

Within 2 miles, the terrain around Grand Forks has only modest variations in elevation — a maximum elevation change of 98 ft around an average of 833 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 141 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 807 ft.

The land around Grand Forks is covered by artificial surfaces (35%), trees (26%) and grassland (25%) within 2 miles, cropland (74%) within 10 miles, and cropland (81%) within 50 miles.

2 miles
98 ft
10 miles
141 ft
50 miles
807 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: West Fargo 73 mi · Fargo 73 mi · Moorhead 74 mi · Jamestown 105 mi · Steinbach 112 mi · Fort Garry South 129 mi · Winnipeg 135 mi · St. James-Assiniboia East 136 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 Grand Forks (47.9253°, -97.0328°, elevation 830 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).