Paso Robles weather in December

In December, Paso Robles sees average daytime highs of 59°F and overnight lows near 39°F, with 2.3 in of rain across 6.1 wet days and about 9.6 hours of daylight. It is the 12th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 59°F through the month. The sky is clear or mostly clear about 44% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 48 min at the start of December to 9 h 36 min by month's end. Set against the rest of the year, December is Paso Robles's 9th-clearest and 6th-windiest month. For the whole year in context, see Paso Robles's year-round climate.

Daytime high
59°
12th warmest
Overnight low
39°
1st coldest
Rainfall
2.3 in
6.1 wet days
Daylight
9 h 36 min
7:11 AM – 4:47 PM
Cloud cover
48%
9th clearest
Wind
5 mph
6th windiest
Solar energy
2.68 kWh/m²
Travel score
5.0
out of 10

Paso Robles is city in San Luis Obispo County, California, United States.

Density
539/km²
people per km²
Founded
1889

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 59°F through the month.

A typical December day in Paso Robles reaches about 59°F in the afternoon and slips back to 39°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 52°F and 66°F. Set against its neighbours, December runs about 7°F cooler than November and on par with January.

20°30°40°50°60°70°151015202531
Avg high (°F)Avg low (°F)
16141
26141
36041
46040
56040
66040
76040
85940
95940
105940
115940
125940
135840
145839
155839
165839
175839
185839
195839
205839
215839
225838
235838
245838
255838
265838
275838
285838
295839
305839
315839

Paso Robles weather by month

How December compares with the rest of the year at a glance. December is the 12th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan59° / 40°3.16.99.95.0
Feb61° / 41°3.17.610.75.3
Mar65° / 44°2.46.211.76.6
Apr69° / 46°0.93.412.97.8
May76° / 51°0.41.613.98.9
Jun82° / 56°0.10.314.48.4
Jul85° / 60°0.00.114.27.3
Aug85° / 60°0.00.213.37.2
Sep82° / 57°0.10.512.28.3
Oct75° / 52°0.61.811.18.9
Nov65° / 44°1.03.210.17.2
Dec59° / 39°2.36.19.65.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 42%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16238
26139
36139
46040
56040
65941
75941
85842
95743
105743
115743
125743
135743
145743
155743
165842
175842
185842
195941
205941
215941
225941
235941
245842
255941
265842
275842
285743
295743
305644
315644

Chance of precipitation in December

Any precipitation

Paso Robles gets around 2.3 in of rain over 6.1 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 19% and peaks near 22% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
117
218
318
418
519
619
719
819
919
1020
1119
1219
1319
1419
1519
1619
1719
1819
1919
2019
2119
2220
2320
2420
2520
2621
2721
2821
2921
3022
3122

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 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1982
2982
3982
4982
5982
6982
7982
8982
9982
10982
11991
12991
13991
14991
15991
16991
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991
31991

Wind in December

Winds average 5 mph in December.

Across December, daily wind ranges from about 5 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 48 min at the start of December to 9 h 36 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 7:00 AM to 7:17 AM, and sunset from 4:45 PM to 4:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.87:004:45
29.77:004:45
39.77:014:45
49.77:024:45
59.77:034:45
69.77:044:45
79.77:054:45
89.77:054:45
99.77:064:45
109.67:074:46
119.67:084:46
129.67:084:46
139.67:094:46
149.67:104:46
159.67:104:47
169.67:114:47
179.67:114:47
189.67:124:48
199.67:134:48
209.67:134:48
219.67:144:49
229.67:144:49
239.67:154:50
249.67:154:50
259.67:154:51
269.67:164:51
279.67:164:52
289.67:174:53
299.67:174:53
309.67:174:54
319.67:174:55

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.68 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.68 kWh/m² to a high of 8.34 kWh/m² in June across the year — December's 2.68 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.8Moderate
22.8Moderate
32.8Moderate
42.7Moderate
52.7Moderate
62.7Moderate
72.7Moderate
82.7Moderate
92.6Moderate
102.6Moderate
112.6Moderate
122.6Moderate
132.6Moderate
142.6Moderate
152.6Moderate
162.6Moderate
172.6Moderate
182.6Moderate
192.6Moderate
202.6Moderate
212.6Moderate
222.6Moderate
232.6Moderate
242.7Moderate
252.7Moderate
262.7Moderate
272.7Moderate
282.7Moderate
292.7Moderate
302.7Moderate
312.7Moderate
Planning a trip in December

Is December a good time to visit Paso Robles?

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

5.0
Sightseeing
11th-best month of the year
0.2
Beach & pool
11th-best month of the year

December is a reasonable time to visit Paso Robles for sightseeing.

What to pack for Paso Robles in December

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

In December, Paso Robles sees daytime highs around 59°F and nights near 39°F. Worth packing: a warm layer. About 6 days see rain.

a warm layer

Sea temperature near Paso Robles in December

The nearest coast averages about 57°F in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 21 mi away) is warmest in September at about 60°F and coldest in April near 54°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

52°54°56°58°60°62°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°F)Comfort
Jan56Bracing
Feb56Bracing
Mar55Bracing
Apr54Bracing
May54Bracing
Jun56Bracing
Jul58Bracing
Aug59Cool
Sep60Cool
Oct60Cool
Nov58Bracing
Dec57Bracing

UV index in Paso Robles in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Paso Robles peaks around June 21 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 21UV 11Dec 14UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun11Extreme
Jul10Extreme
Aug10Extreme
Sep7Very high
Oct6High
Nov3Moderate
Dec3Moderate

Air quality in Paso Robles 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 Paso Robles is worst in August — around 18 µg/m³ PM2.5 (moderate), about 4.2× the cleanest month (June, 4 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 2017 µg/m³Jun 114 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb7Good
Mar7Good
Apr6Good
May5Good
Jun4Good
Jul10Good
Aug18Moderate
Sep15Moderate
Oct8Good
Nov6Good
Dec6Good
Location & terrain

Where is Paso Robles?

Paso Robles sits at 35.6°N, 120.7°W, 732 ft above sea level, in United States. The nearest listed city is Atascadero, 9.3 mi away.

Topography around Paso Robles

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

Within 2 miles, the terrain around Paso Robles has significant variations in elevation — a maximum elevation change of 876 ft around an average of 899 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,716 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 5,095 ft.

The land around Paso Robles is covered by grassland (42%) and artificial surfaces (37%) within 2 miles, grassland (71%) within 10 miles, and grassland (55%) and water (20%) within 50 miles.

2 miles
876 ft
10 miles
1,716 ft
50 miles
5,095 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Atascadero 9.3 mi · San Luis Obispo 24 mi · Arroyo Grande 35 mi · Coalinga 40 mi · Nipomo 42 mi · Santa Maria 48 mi · Orcutt 55 mi · Greenfield 57 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 Paso Robles (35.6266°, -120.691°, elevation 732 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).