Daly City weather in December

In December, Daly City sees average daytime highs of 56°F and overnight lows near 47°F, with 4.2 in of rain across 10.1 wet days and about 9.4 hours of daylight. It is the 11th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 56°F through the month. The sky is clear or mostly clear about 35% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 36 min at the start of December to 9 h 24 min by month's end. Set against the rest of the year, December is Daly City's 10th-clearest and 8th-windiest month. For the whole year in context, see Daly City's year-round climate.

Daytime high
56°
11th warmest
Overnight low
47°
2nd coldest
Rainfall
4.2 in
10.1 wet days
Daylight
9 h 24 min
7:24 AM – 4:48 PM
Cloud cover
57%
10th clearest
Wind
8 mph
8th windiest
Solar energy
2.19 kWh/m²
Travel score
3.8
out of 10

Daly City is city in San Mateo County, California, United States.

Density
5,369/km²
people per km²
Founded
1911

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 56°F through the month.

A typical December day in Daly City reaches about 56°F in the afternoon and slips back to 47°F overnight — a 9°F spread between the day's warmth and the night's chill. On most days the high lands between 52°F and 60°F. Set against its neighbours, December runs about 4°F cooler than November and on par with January.

40°50°60°70°151015202531
Avg high (°F)Avg low (°F)
15748
25748
35748
45748
55748
65648
75648
85648
95648
105647
115647
125647
135647
145647
155647
165547
175547
185547
195547
205546
215546
225546
235546
245546
255546
265546
275546
285546
295546
305546
315546

Daly City weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan55° / 47°4.310.19.73.7
Feb57° / 48°4.49.310.54.0
Mar58° / 49°3.29.311.74.5
Apr59° / 50°1.5512.95.4
May61° / 52°0.72.8146.3
Jun64° / 54°0.20.814.67.5
Jul65° / 55°0.00.114.37.8
Aug66° / 56°0.00.113.57.9
Sep67° / 56°0.10.412.38.1
Oct65° / 54°0.93.1117.5
Nov60° / 50°2.26.1105.4
Dec56° / 47°4.210.19.43.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 53%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
24951
34951
44852
54753
64654
74654
84555
94456
104456
114555
124555
134654
144654
154654
164852
174852
184951
194951
205050
215050
225050
235050
244951
254951
264951
274951
284753
294654
304654
314555

Chance of precipitation in December

Any precipitation

Daly City gets around 4.2 in of rain over 10.1 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 32% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
130
231
331
432
533
634
734
835
935
1035
1136
1235
1335
1435
1534
1634
1733
1833
1932
2032
2131
2231
2331
2431
2530
2630
2730
2830
2931
3031
3131

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 97% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1964
2964
3964
4964
5964
6964
7964
8964
9964
10973
11973
12973
13973
14973
15982
16982
17982
18982
19982
20982
21982
22982
23982
24982
25982
26982
27982
28982
29982
30982
31982

Wind in December

Winds average 8 mph in December.

Across December, daily wind ranges from about 8 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
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
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 36 min at the start of December to 9 h 24 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 7:12 AM to 7:30 AM, and sunset from 4:47 PM to 4:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.67:124:47
29.67:134:47
39.57:144:47
49.57:154:47
59.57:164:47
69.57:174:47
79.57:174:47
89.57:184:47
99.57:194:47
109.57:204:47
119.47:204:47
129.47:214:47
139.47:224:47
149.47:234:48
159.47:234:48
169.47:244:48
179.47:244:48
189.47:254:49
199.47:264:49
209.47:264:50
219.47:274:50
229.47:274:50
239.47:284:51
249.47:284:51
259.47:284:52
269.47:294:53
279.47:294:53
289.47:294:54
299.47:304:54
309.47:304:55
319.47:304:56

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.19 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.19 kWh/m² to a high of 7.72 kWh/m² in June across the year — December's 2.19 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.3Moderate
22.3Moderate
32.3Moderate
42.2Moderate
52.2Moderate
62.2Moderate
72.2Moderate
82.2Moderate
92.1Moderate
102.1Moderate
112.1Moderate
122.1Moderate
132.1Moderate
142.1Moderate
152.1Moderate
162.1Moderate
172.1Moderate
182.1Moderate
192.1Moderate
202.1Moderate
212.2Moderate
222.2Moderate
232.2Moderate
242.2Moderate
252.2Moderate
262.2Moderate
272.2Moderate
282.2Moderate
292.2Moderate
302.2Moderate
312.2Moderate
Planning a trip in December

Hazard calendar for Daly City

In seasonPeak

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

Daly City's rainy season runs November–March, 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 Daly City?

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

3.8
Sightseeing
11th-best month of the year
0.0
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Daly City.

What to pack for Daly City in December

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

In December, Daly City sees daytime highs around 56°F and nights near 47°F. Worth packing: a warm layer and rain gear. About 10 days see rain.

a warm layerrain gear

Sea temperature near Daly City in December

The nearest coast averages about 54°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 11 mi away) is warmest in September at about 58°F and coldest in April near 53°F.

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

52°54°56°58°60°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°F)Comfort
Jan53Bracing
Feb54Bracing
Mar54Bracing
Apr53Bracing
May53Bracing
Jun54Bracing
Jul56Bracing
Aug58Bracing
Sep58Bracing
Oct57Bracing
Nov56Bracing
Dec54Bracing

UV index in Daly City in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Daly City peaks around June 23 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 23UV 10Dec 15UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr6High
May8Very high
Jun10Extreme
Jul10Extreme
Aug10Very high
Sep6High
Oct5High
Nov2Moderate
Dec2Moderate

Air quality in Daly City 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 Daly City is worst in August — around 25 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (June, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateAug 1824 µg/m³Jun 1110 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar16Moderate
Apr12Moderate
May10Good
Jun10Good
Jul11Good
Aug25Moderate
Sep17Moderate
Oct20Moderate
Nov18Moderate
Dec13Moderate
Location & terrain

Where is Daly City?

Daly City sits at 37.7°N, 122.5°W, 407 ft above sea level, in United States. The nearest listed city is Parkside, 3.1 mi away.

Topography around Daly City

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

Within 2 miles, the terrain around Daly City has significant variations in elevation — a maximum elevation change of 1,270 ft around an average of 315 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,893 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,042 ft.

The land around Daly City is covered by artificial surfaces (63%) and trees (20%) within 2 miles, water (62%) and artificial surfaces (21%) within 10 miles, and water (42%), grassland (22%) and trees (21%) within 50 miles.

2 miles
1,270 ft
10 miles
1,893 ft
50 miles
4,042 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Parkside 3.1 mi · Visitacion Valley 3.1 mi · Noe Valley 3.7 mi · Mission District 4.3 mi · South San Francisco 4.3 mi · Bayview-Hunters Point 5.0 mi · San Francisco 5.6 mi · San Bruno 5.6 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 Daly City (37.7058°, -122.4619°, elevation 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. 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).