Stillwater weather in August

In August, Stillwater sees average daytime highs of 78°F and overnight lows near 61°F, with 3.8 in of rain across 10.1 wet days and about 13.9 hours of daylight. It is the 2nd-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 80°F in the first days to 77°F by the end. The sky is clear or mostly clear about 38% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 36 min at the start of August to 13 h 12 min by month's end. Set against the rest of the year, August is Stillwater's 2nd-clearest and 12th-windiest month. For the whole year in context, see Stillwater's year-round climate.

Daytime high
78°
2nd warmest
Overnight low
61°
11th coldest
Rainfall
3.8 in
10.1 wet days
Daylight
13 h 54 min
5:18 AM – 7:13 PM
Cloud cover
53%
2nd clearest
Wind
7 mph
12th windiest
Solar energy
5.4 kWh/m²
Travel score
6.8
out of 10

Stillwater is city in and county seat of Washington County, Minnesota, United States.

Density
915/km²
people per km²
Founded
1843

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 80°F in the first days to 77°F by the end.

A typical August day in Stillwater reaches about 78°F in the afternoon and slips back to 61°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 71°F and 86°F. Set against its neighbours, August runs about 2°F cooler than July and about 8°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18062
28062
38062
48062
58062
68062
77962
87962
97961
107961
117961
127961
137961
147861
157861
167861
177861
187860
197860
207860
217860
227860
237860
247860
257860
267760
277759
287759
297759
307759
317658

How August really feels in Stillwater

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.

Stillwater weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan23° / 1.06690.0
Feb28° / 11°1.05.24.910.10.0
Mar40° / 24°2.07.84.311.60.4
Apr55° / 37°3.210.72.513.23.4
May67° / 49°4.312.20.114.65.8
Jun77° / 59°4.412015.46.4
Jul81° / 63°3.410.3015.16.6
Aug78° / 61°3.810.1013.96.8
Sep71° / 52°3.49.4012.36.7
Oct56° / 40°2.79.10.810.73.9
Nov40° / 27°2.06.73.79.30.4
Dec27° / 14°1.46.46.28.60.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 20% of August, with mostly cloudy or overcast conditions the remaining 42%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26139
36040
45941
55941
65842
75842
85644
95644
105644
115644
125545
135545
145545
155545
165644
175644
185644
195644
205644
215644
225743
235842
245842
255941
265941
275941
286040
296139
306139
316139

Chance of precipitation in August

Any precipitation

Stillwater gets around 3.8 in of rain over 10.1 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 33% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
134
234
334
434
534
634
734
834
934
1034
1134
1234
1334
1434
1533
1633
1733
1833
1932
2032
2132
2232
2331
2431
2531
2630
2730
2830
2930
3030
3130

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 27% of days. Sticky, muggy-or-worse air turns up on roughly 20% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1212628196
2212628186
3212728186
4212728186
5222728186
6222827175
7222827175
8232827175
9232826175
10232926175
11232926174
12232926174
13232926174
14232927174
15242927164
16242928164
17242828163
18242829163
19242829163
20242729163
21242729163
22252729163
23262729163
24262629163
25272628163
26282628163
27302527153
28312526153
29332425152
30352424152
31372423142

Wind in August

Winds average 7 mph in August, the calmest month.

Across August, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 36 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 84 minutes over August. Sunrise moves from 5:00 AM to 5:37 AM, and sunset from 7:34 PM to 6:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.65:007:34
214.55:017:33
314.55:037:32
414.45:047:30
514.45:057:29
614.45:067:28
714.35:077:26
814.35:087:25
914.25:107:23
1014.25:117:22
1114.15:127:20
1214.15:137:19
1314.05:147:17
1414.05:167:16
1514.05:177:14
1613.95:187:13
1713.95:197:11
1813.85:217:09
1913.85:227:08
2013.75:237:06
2113.75:247:04
2213.65:257:02
2313.65:277:01
2413.55:286:59
2513.55:296:57
2613.45:306:55
2713.45:326:53
2813.35:336:52
2913.35:346:50
3013.25:356:48
3113.25:376:46

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.4 kWh/m².

For context, solar energy here swings from a low near 1.39 kWh/m² to a high of 6.27 kWh/m² in July across the year — August's 5.4 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.8Bright
55.8Bright
65.8Bright
75.7Bright
85.7Bright
95.7Bright
105.6Bright
115.6Bright
125.5Bright
135.5Bright
145.5Bright
155.4Bright
165.4Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.2Bright
225.2Bright
235.2Bright
245.1Bright
255.1Bright
265.1Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
314.9Bright
Planning a trip in August

Is August a good time to visit Stillwater?

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

6.8
Sightseeing
1st-best month of the year
6.4
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Stillwater for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Stillwater in August

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

In August, Stillwater sees daytime highs around 78°F and nights near 61°F. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

UV index in Stillwater 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 Stillwater peaks around June 18 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 12 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 18UV 8Jan 12UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5Moderate
May7High
Jun9Very high
Jul8Very high
Aug7Very high
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Stillwater?

Stillwater sits at 45.1°N, 92.8°W, 696 ft above sea level, in United States. The nearest listed city is Oakdale, 9.9 mi away.

Topography around Stillwater

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

Within 2 miles, the terrain around Stillwater has only modest variations in elevation — a maximum elevation change of 312 ft around an average of 850 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 463 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 830 ft.

The land around Stillwater is covered by trees (46%) within 2 miles, trees (49%) and grassland (27%) within 10 miles, and trees (43%) and cropland (32%) within 50 miles.

2 miles
312 ft
10 miles
463 ft
50 miles
830 ft
treesgrasslandcroplandartificial surfaceswaterwetland
August weather nearby: Oakdale 9.9 mi · White Bear Lake 9.9 mi · Maplewood 12 mi · Woodbury 12 mi · Lino Lakes 16 mi · South Saint Paul 16 mi · Saint Paul 16 mi · River Falls 16 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 Stillwater (45.0564°, -92.806°, elevation 696 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).