Grants Pass weather in December

In December, Grants Pass sees average daytime highs of 45°F and overnight lows near 32°F, with 6.7 in of precipitation across 14.7 wet days and about 8.9 hours of daylight. It is the 12th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 45°F through the month. The sky is clear or mostly clear about 16% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 06 min at the start of December to 8 h 54 min by month's end. Set against the rest of the year, December is Grants Pass's 12th-clearest and 10th-windiest month. For the whole year in context, see Grants Pass's year-round climate.

Daytime high
45°
12th warmest
Overnight low
32°
1st coldest
Precipitation
6.7 in
14.7 wet days
Daylight
8 h 54 min
7:42 AM – 4:37 PM
Cloud cover
72%
12th clearest
Wind
3 mph
10th windiest
Solar energy
1.47 kWh/m²
Travel score
0.9
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 December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 45°F through the month.

A typical December day in Grants Pass reaches about 45°F in the afternoon and slips back to 32°F overnight — a 13°F spread between the day's warmth and the night's chill. On most days the high lands between 39°F and 51°F. Set against its neighbours, December runs about 7°F cooler than November and about 2°F cooler than January.

20°30°40°50°60°151015202531
Avg high (°F)Avg low (°F)
14733
24733
34733
44633
54633
64633
74632
84632
94632
104532
114532
124532
134532
144532
154532
164532
174532
184532
194532
204432
214431
224431
234431
244431
254431
264431
274431
284531
294531
304531
314531

How December really feels in Grants Pass

Once humidity and wind are folded in, December averages 0 days that feel above 90°F and 20 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
20
wind chill below the day's low

The story in December is cold — wind chill drags the overnight "feels like" below the raw low.

Grants Pass weather by month

How December compares with the rest of the year at a glance. December is the 12th-warmest and 1st-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 73%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12971
23070
32971
42971
52971
62872
72872
82773
92773
102674
112575
122575
132476
142476
152575
162575
172575
182575
192773
202773
212773
222872
232872
242872
252872
262872
272872
282872
292872
302773
312773

Chance of precipitation in December

Any precipitationSnow

Grants Pass gets around 6.7 in of rain and snow over 14.7 wet days in December, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 48% and peaks near 49% on the wettest days, and about 4 days bring snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1489
2489
3489
44810
54810
64910
74910
84911
94911
104912
114913
124913
134914
144915
154915
164916
174916
184917
194817
204818
214718
224718
234718
244618
254618
264618
274517
284517
294517
304516
314516

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in December

Winds average 3 mph in December.

Across December, daily wind ranges from about 3 mph on the calmest days to 3 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
293calm
303calm
313calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 06 min at the start of December to 8 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:29 AM to 7:49 AM, and sunset from 4:37 PM to 4:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.17:294:37
29.17:304:36
39.17:314:36
49.17:324:36
59.07:334:36
69.07:344:36
79.07:354:36
89.07:364:36
99.07:374:36
109.07:384:36
119.07:394:36
128.97:394:36
138.97:404:36
148.97:414:36
158.97:424:36
168.97:424:37
178.97:434:37
188.97:444:37
198.97:444:38
208.97:454:38
218.97:454:38
228.97:464:39
238.97:464:39
248.97:474:40
258.97:474:40
268.97:474:41
278.97:484:42
288.97:484:42
298.97:484:43
308.97:484:44
318.97:494:44

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.47 kWh/m² — the year's lowest.

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 — December's 1.47 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.5Dim
21.5Dim
31.5Dim
41.5Dim
51.5Dim
61.5Dim
71.5Dim
81.4Dim
91.4Dim
101.4Dim
111.4Dim
121.4Dim
131.4Dim
141.4Dim
151.4Dim
161.4Dim
171.4Dim
181.4Dim
191.4Dim
201.4Dim
211.4Dim
221.4Dim
231.5Dim
241.5Dim
251.5Dim
261.5Dim
271.5Dim
281.5Dim
291.5Dim
301.5Dim
311.5Dim
Planning a trip in December

Hazard calendar for Grants Pass

In seasonPeak

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

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 December a good time to visit Grants Pass?

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

0.9
Sightseeing
12th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Grants Pass.

What to pack for Grants Pass in December

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

In December, Grants Pass sees daytime highs around 45°F and nights near 32°F. Pack a warm layer and rain gear. Worth having: a heavy coat. About 15 days see rain.

a warm layerrain geara heavy coat

UV index in Grants Pass in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 1. 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 December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December 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
December 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).