Jamestown weather in August

In August, Jamestown sees average daytime highs of 78°F and overnight lows near 56°F, with 2.9 in of rain across 8.5 wet days and about 14 hours of daylight. It is the 2nd-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 78°F through the month. The sky is clear or mostly clear about 48% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 h 42 min at the start of August to 13 h 12 min by month's end. Set against the rest of the year, August is Jamestown's 1st-clearest and 11th-windiest month. For the whole year in context, see Jamestown's year-round climate.

Daytime high
78°
2nd warmest
Overnight low
56°
11th coldest
Rainfall
2.9 in
8.5 wet days
Daylight
14 hours
5:38 AM – 7:40 PM
Cloud cover
45%
1st clearest
Wind
8 mph
11th windiest
Solar energy
5.66 kWh/m²
Travel score
7.3
out of 10

Jamestown is seat of Stutsman County, North Dakota, United States.

Density
462/km²
people per km²
Founded
1872

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 78°F through the month.

A typical August day in Jamestown reaches about 78°F in the afternoon and slips back to 56°F overnight — a 21°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 9°F warmer than September.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
17958
27958
37958
47958
57858
67857
77857
87857
97857
107857
117857
127857
137857
147856
157856
167856
177856
187856
197856
207856
217856
227856
237756
247755
257755
267755
277755
287655
297654
307654
317654

How August really feels in Jamestown

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.

Jamestown 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
Jan18° / 0.74.75.28.80.0
Feb22° / 0.74.84.9100.0
Mar34° / 18°1.25.84.111.60.0
Apr51° / 31°1.87.82.713.32.6
May65° / 44°3.210.80.414.85.7
Jun74° / 55°4.511.6015.66.5
Jul79° / 59°3.69.7015.37.0
Aug78° / 56°2.98.50147.3
Sep69° / 47°2.57.4012.46.9
Oct54° / 35°2.16.91.310.63.5
Nov37° / 20°1.04.94.19.20.1
Dec23° / 0.95.15.48.40.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% 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 33%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16832
26733
36733
46634
56535
66535
76535
86436
96535
106535
116535
126535
136634
146634
156733
166733
176733
186832
196832
206832
216931
226931
236931
246931
256931
266931
276931
286832
296733
306733
316634

Chance of precipitation in August

Any precipitation

Jamestown gets around 2.9 in of rain over 8.5 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 27% and peaks near 29% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
126
226
326
427
527
627
728
828
928
1029
1129
1229
1329
1429
1529
1629
1729
1829
1928
2028
2128
2228
2327
2427
2526
2626
2726
2825
2925
3025
3125

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 38% of days. Sticky, muggy-or-worse air turns up on roughly 10% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1283325112
2283325112
3293325112
4293325112
5303225112
6303225112
7313225112
8313225102
9323125102
10333124101
11333124101
12343124101
1335312491
1436302491
1536302491
1637302491
1738292391
1838292391
1939292381
2039292380
2140292280
2241292280
2342292280
2443292180
2544282170
2645282070
2746281970
2847281870
2949281860
3050271760
3152271560

Wind in August

Winds average 8 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
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light 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 42 min at the start of August to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 90 minutes over August. Sunrise moves from 5:18 AM to 5:58 AM, and sunset from 8:03 PM to 7:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.75:188:03
214.75:208:02
314.75:218:01
414.65:227:59
514.65:237:58
614.55:257:56
714.55:267:55
814.45:277:53
914.45:297:52
1014.35:307:50
1114.35:317:48
1214.25:327:47
1314.25:347:45
1414.15:357:44
1514.15:367:42
1614.05:387:40
1714.05:397:38
1813.95:407:37
1913.95:427:35
2013.85:437:33
2113.85:447:31
2213.75:467:29
2313.75:477:27
2413.65:487:26
2513.65:507:24
2613.55:517:22
2713.55:527:20
2813.45:547:18
2913.35:557:16
3013.35:567:14
3113.25:587:12

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.66 kWh/m².

For context, solar energy here swings from a low near 1.39 kWh/m² to a high of 6.46 kWh/m² in July across the year — August's 5.66 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.1Intense
46.1Intense
56.0Intense
66.0Intense
76.0Bright
85.9Bright
95.9Bright
105.8Bright
115.8Bright
125.8Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.6Bright
185.6Bright
195.6Bright
205.5Bright
215.5Bright
225.5Bright
235.4Bright
245.4Bright
255.3Bright
265.3Bright
275.3Bright
285.2Bright
295.2Bright
305.1Bright
315.0Bright
Planning a trip in August

Hazard calendar for Jamestown

In seasonPeak

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

Jamestown'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 Jamestown?

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
6.7
Beach & pool
1st-best month of the year

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

What to pack for Jamestown in August

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

In August, Jamestown 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 Jamestown 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 Jamestown peaks around June 19 at about 8 (very high) — sunscreen, a hat and midday shade are essential. 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 19UV 8Dec 20UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr4Moderate
May6High
Jun9Very high
Jul8Very high
Aug7High
Sep5High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Jamestown 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 Jamestown is worst in August — around 15 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (October, 5 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1215 µg/m³Oct 205 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar12Moderate
Apr11Good
May10Good
Jun9Good
Jul14Moderate
Aug15Moderate
Sep10Good
Oct5Good
Nov7Good
Dec8Good
Location & terrain

Where is Jamestown?

Jamestown sits at 46.9°N, 98.7°W, 1,407 ft above sea level, in United States. The nearest listed city is West Fargo, 85 mi away.

Topography around Jamestown

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

Within 2 miles, the terrain around Jamestown has only modest variations in elevation — a maximum elevation change of 141 ft around an average of 1,457 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 259 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,135 ft.

The land around Jamestown is covered by grassland (39%) and artificial surfaces (28%) within 2 miles, cropland (66%) and grassland (27%) within 10 miles, and cropland (64%) and grassland (30%) within 50 miles.

2 miles
141 ft
10 miles
259 ft
50 miles
1,135 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: West Fargo 85 mi · Fargo 91 mi · Moorhead 91 mi · Bismarck 98 mi · Aberdeen 101 mi · Mandan 103 mi · Grand Forks 105 mi · Minot 151 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 Jamestown (46.9105°, -98.7084°, elevation 1,407 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).