Grants Pass weather in August

In August, Grants Pass sees average daytime highs of 85°F and overnight lows near 55°F, with 0.4 in of rain across 1.6 wet days and about 13.7 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 87°F in the first days to 83°F by the end. The sky is clear or mostly clear about 79% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 h 18 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Grants Pass's 2nd-clearest and 3rd-windiest month. For the whole year in context, see Grants Pass's year-round climate.

Daytime high
85°
1st warmest
Overnight low
55°
11th coldest
Rainfall
0.4 in
1.6 wet days
Daylight
13 h 42 min
5:25 AM – 7:10 PM
Cloud cover
20%
2nd clearest
Wind
4 mph
3rd windiest
Solar energy
6.91 kWh/m²
Travel score
6.8
out of 10

Grants Pass is city in and county seat of Josephine County, Oregon, United States.

Density
1,235/km²
people per km²
Founded
1865

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 87°F in the first days to 83°F by the end.

A typical August day in Grants Pass reaches about 85°F in the afternoon and slips back to 55°F overnight — a 30°F spread between the day's warmth and the night's chill. On most days the high lands between 76°F and 94°F. Set against its neighbours, August runs on par with July and about 7°F warmer than September.

40°60°80°100°151015202531
Avg high (°F)Avg low (°F)
18757
28757
38757
48757
58757
68757
78756
88756
98656
108656
118656
128656
138656
148656
158656
168656
178556
188555
198555
208555
218555
228555
238455
248455
258454
268454
278454
288354
298354
308354
318353

How August really feels in Grants Pass

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.

Grants Pass weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan47° / 32°5.214.249.21.3
Feb51° / 34°4.212.73.510.32.2
Mar55° / 36°4.614.72.811.63.2
Apr60° / 39°3.213.11.513.14.4
May68° / 45°2.39.3014.46.5
Jun75° / 50°1.04.30158.0
Jul85° / 56°0.31.4014.86.9
Aug85° / 55°0.41.6013.76.8
Sep79° / 51°0.73012.38.3
Oct66° / 43°2.17010.86.7
Nov52° / 36°4.5131.69.62.6
Dec45° / 32°6.714.74.48.90.9

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 79% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 10% of August, with mostly cloudy or overcast conditions the remaining 11%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
19010
29010
39010
48911
58911
68911
78911
88812
98812
108812
118812
128911
138911
148812
158812
168812
178812
188911
198911
208911
218911
228911
238911
248911
258911
268911
278911
289010
298911
308911
318911

Chance of precipitation in August

Any precipitation

Grants Pass gets around 0.4 in of rain over 1.6 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 5% and peaks near 5% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
14
24
34
44
54
65
75
85
95
105
115
125
135
145
155
165
175
185
195
205
215
225
235
245
255
265
275
285
295
305
315

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 92% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19271
29271
39271
49271
59271
69271
79271
89271
99181
109181
119181
129181
139181
149181
159280
169280
179280
189280
199280
209280
219280
229370
239370
249370
259460
269460
279550
289550
299550
309640
319640

Wind in August

Winds average 4 mph in August.

Across August, daily wind ranges from about 4 mph on the calmest days to 4 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 18 min at the start of August to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over August. Sunrise moves from 5:09 AM to 5:42 AM, and sunset from 7:29 PM to 6:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.35:097:29
214.35:107:28
314.35:117:27
414.25:127:26
514.25:137:25
614.15:147:23
714.15:167:22
814.15:177:21
914.05:187:20
1014.05:197:18
1113.95:207:17
1213.95:217:15
1313.95:227:14
1413.85:237:13
1513.85:247:11
1613.75:257:10
1713.75:267:08
1813.75:277:07
1913.65:297:05
2013.65:307:03
2113.55:317:02
2213.55:327:00
2313.45:336:59
2413.45:346:57
2513.35:356:55
2613.35:366:54
2713.25:376:52
2813.25:386:50
2913.25:396:49
3013.15:416:47
3113.15:426:45

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.91 kWh/m².

For context, solar energy here swings from a low near 1.47 kWh/m² to a high of 7.8 kWh/m² in July across the year — August's 6.91 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.5Intense
27.5Intense
37.4Intense
47.4Intense
57.3Intense
67.3Intense
77.3Intense
87.2Intense
97.2Intense
107.2Intense
117.1Intense
127.1Intense
137.0Intense
147.0Intense
157.0Intense
166.9Intense
176.9Intense
186.8Intense
196.8Intense
206.8Intense
216.7Intense
226.7Intense
236.6Intense
246.6Intense
256.5Intense
266.5Intense
276.5Intense
286.4Intense
296.3Intense
306.3Intense
316.3Intense
Planning a trip in August

Hazard calendar for Grants Pass

In seasonPeak

None of Grants Pass's seasonal hazards are active in August. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Grants Pass's rainy season runs November–April, 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 Grants Pass?

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

6.8
Sightseeing
4th-best month of the year
8.9
Beach & pool
1st-best month of the year

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

What to pack for Grants Pass in August

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

In August, Grants Pass sees daytime highs around 85°F and nights near 55°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Grants Pass 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 Grants Pass peaks around July 12 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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 highHighModerateLowJul 12UV 9Dec 17UV 1
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar5Moderate
Apr6High
May9Very high
Jun9Very high
Jul9Very high
Aug7Very high
Sep5High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Grants Pass 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 Grants Pass is worst in September — around 56 µg/m³ PM2.5 (unhealthy), about 10.4× the cleanest month (January, 5 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateSep 1452 µg/m³Jan 216 µg/m³
PM2.5 (µg/m³)Level
Jan5Good
Feb7Good
Mar8Good
Apr9Good
May8Good
Jun7Good
Jul15Moderate
Aug32Moderate
Sep56Unhealthy
Oct9Good
Nov14Moderate
Dec14Moderate
Location & terrain

Where is Grants Pass?

Grants Pass sits at 42.4°N, 123.3°W, 945 ft above sea level, in United States. The nearest listed city is Central Point, 22 mi away.

Topography around Grants Pass

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

Within 2 miles, the terrain around Grants Pass has significant variations in elevation — a maximum elevation change of 1,247 ft around an average of 1,063 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,776 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,421 ft.

The land around Grants Pass is covered by artificial surfaces (43%) and trees (41%) within 2 miles, trees (85%) within 10 miles, and trees (89%) within 50 miles.

2 miles
1,247 ft
10 miles
3,776 ft
50 miles
7,421 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Central Point 22 mi · Medford 24 mi · Ashland 36 mi · Roseburg 53 mi · Coos Bay 78 mi · Klamath Falls 81 mi · Altamont 83 mi · McKinleyville 111 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 Grants Pass (42.4393°, -123.3307°, elevation 945 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).