South Yuba City weather in December

In December, South Yuba City sees average daytime highs of 58°F and overnight lows near 42°F, with 4.1 in of rain across 9.7 wet days and about 9.3 hours of daylight. It is the 12th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 61°F in the first days to 57°F by the end. 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 30 min at the start of December to 9 h 18 min by month's end. Set against the rest of the year, December is South Yuba City's 11th-clearest and 6th-windiest month. For the whole year in context, see South Yuba City's year-round climate.

Daytime high: 58°; 12th warmest
Overnight low: 42°; 1st coldest
Rainfall: 4.1 in; 9.7 wet days
Daylight: 9 h 18 min; 7:25 AM – 4:41 PM
Cloud cover: 57%; 11th clearest
Wind: 6 mph; 6th windiest
Solar energy: 2.02 kWh/m²
Travel score: 4.4; out of 10

South Yuba City is unincorporated community and former census-designated place in Sutter County, California, United States.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← November South Yuba City year-round climate January →Best places to visit in December

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 61°F in the first days to 57°F by the end.

A typical December day in South Yuba City reaches about 58°F in the afternoon and slips back to 42°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 52°F and 65°F. Set against its neighbours, December runs about 8°F cooler than November and on par with January.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°F)	61	61	60	60	60	60	60	59	59	59	59	58	58	58	58	58	58	58	57	57	57	57	57	57	57	57	57	57	57	57	57
Avg low (°F)	44	44	44	44	43	43	43	43	43	43	43	43	42	42	42	42	42	42	42	42	41	41	41	41	41	41	41	41	41	41	41

	Avg high (°F)	Avg low (°F)
1	61	44
2	61	44
3	60	44
4	60	44
5	60	43
6	60	43
7	60	43
8	59	43
9	59	43
10	59	43
11	59	43
12	58	43
13	58	42
14	58	42
15	58	42
16	58	42
17	58	42
18	58	42
19	57	42
20	57	42
21	57	41
22	57	41
23	57	41
24	57	41
25	57	41
26	57	41
27	57	41
28	57	41
29	57	41
30	57	41
31	57	41

How December really feels in South Yuba City

Once humidity and wind are folded in, December 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

heat index over the day's high

Days feeling ≤ 32°F

wind chill below the day's low

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

South Yuba City weather by month

How December compares with the rest of the year at a glance. December is the 12th-warmest and 2nd-wettest month here — the current month is highlighted below.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Daylight (hours)	Travel score
Jan	59° / 42°	4.4	9.8	9.6	4.5
Feb	63° / 45°	4.0	8.9	10.5	5.6
Mar	68° / 48°	3.3	8.9	11.7	6.6
Apr	75° / 52°	1.5	5.5	13	7.6
May	85° / 58°	0.9	3.6	14.1	6.5
Jun	93° / 64°	0.2	1	14.7	3.9
Jul	97° / 65°	0.0	0.1	14.5	2.5
Aug	96° / 64°	0.0	0.2	13.5	3.2
Sep	91° / 61°	0.1	0.6	12.3	5.0
Oct	80° / 55°	1.1	3.1	11	7.9
Nov	67° / 47°	2.3	6.2	9.9	6.8
Dec	58° / 42°	4.1	9.7	9.3	4.4

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 11% of December, with mostly cloudy or overcast conditions the remaining 54%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	51	50	50	48	47	46	46	45	44	44	43	43	43	44	44	44	45	45	46	47	47	48	48	47	47	46	46	46	46	46	45
Cloudier (%)	49	50	50	52	53	54	54	55	56	56	57	57	57	56	56	56	55	55	54	53	53	52	52	53	53	54	54	54	54	54	55

	Clearer (%)	Cloudier (%)
1	51	49
2	50	50
3	50	50
4	48	52
5	47	53
6	46	54
7	46	54
8	45	55
9	44	56
10	44	56
11	43	57
12	43	57
13	43	57
14	44	56
15	44	56
16	44	56
17	45	55
18	45	55
19	46	54
20	47	53
21	47	53
22	48	52
23	48	52
24	47	53
25	47	53
26	46	54
27	46	54
28	46	54
29	46	54
30	46	54
31	45	55

Chance of precipitation in December

Any precipitation

South Yuba City gets around 4.1 in of rain over 9.7 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 31% and peaks near 34% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	29	30	30	31	32	33	33	34	34	34	34	34	34	34	33	33	32	31	31	30	30	30	30	29	29	29	29	29	30	30	31

	Rain chance (%)
1	29
2	30
3	30
4	31
5	32
6	33
7	33
8	34
9	34
10	34
11	34
12	34
13	34
14	34
15	33
16	33
17	32
18	31
19	31
20	30
21	30
22	30
23	30
24	29
25	29
26	29
27	29
28	29
29	30
30	30
31	31

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 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	98	98	98	98	98	98	98	98	98	98	98	98	98	99	99	99	99	99	99	99	99	99	99	99	99	98	98	98	98	98	98
Comfortable (%)	2	2	2	2	2	2	2	2	2	2	2	2	2	1	1	1	1	1	1	1	1	1	1	1	1	2	2	2	2	2	2

	Dry (%)	Comfortable (%)
1	98	2
2	98	2
3	98	2
4	98	2
5	98	2
6	98	2
7	98	2
8	98	2
9	98	2
10	98	2
11	98	2
12	98	2
13	98	2
14	99	1
15	99	1
16	99	1
17	99	1
18	99	1
19	99	1
20	99	1
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	98	2
27	98	2
28	98	2
29	98	2
30	98	2
31	98	2

Wind in December

Winds average 6 mph in December.

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

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (mph)	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (mph)	Feels
1	6	calm
2	6	calm
3	6	calm
4	6	calm
5	6	calm
6	6	calm
7	6	calm
8	6	calm
9	6	calm
10	6	calm
11	6	calm
12	6	calm
13	6	calm
14	6	calm
15	6	calm
16	6	calm
17	6	calm
18	6	calm
19	6	calm
20	6	calm
21	6	calm
22	6	calm
23	6	calm
24	6	calm
25	6	calm
26	6	calm
27	6	calm
28	6	calm
29	6	calm
30	6	calm
31	6	calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 30 min at the start of December to 9 h 18 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 7:13 AM to 7:31 AM, and sunset from 4:40 PM to 4:48 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	9.5	9.4	9.4	9.4	9.4	9.4	9.4	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.2	9.2	9.2	9.2	9.2	9.3	9.3	9.3	9.3	9.3	9.3	9.3
Sunrise (AM)	7:13	7:14	7:15	7:15	7:16	7:17	7:18	7:19	7:20	7:21	7:21	7:22	7:23	7:23	7:24	7:25	7:25	7:26	7:27	7:27	7:28	7:28	7:29	7:29	7:29	7:30	7:30	7:30	7:31	7:31	7:31
Sunset (PM)	4:40	4:40	4:40	4:39	4:39	4:39	4:39	4:39	4:39	4:39	4:40	4:40	4:40	4:40	4:40	4:41	4:41	4:41	4:42	4:42	4:42	4:43	4:43	4:44	4:44	4:45	4:46	4:46	4:47	4:48	4:48

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.5	7:13	4:40
2	9.4	7:14	4:40
3	9.4	7:15	4:40
4	9.4	7:15	4:39
5	9.4	7:16	4:39
6	9.4	7:17	4:39
7	9.4	7:18	4:39
8	9.3	7:19	4:39
9	9.3	7:20	4:39
10	9.3	7:21	4:39
11	9.3	7:21	4:40
12	9.3	7:22	4:40
13	9.3	7:23	4:40
14	9.3	7:23	4:40
15	9.3	7:24	4:40
16	9.3	7:25	4:41
17	9.3	7:25	4:41
18	9.3	7:26	4:41
19	9.3	7:27	4:42
20	9.2	7:27	4:42
21	9.2	7:28	4:42
22	9.2	7:28	4:43
23	9.2	7:29	4:43
24	9.2	7:29	4:44
25	9.3	7:29	4:44
26	9.3	7:30	4:45
27	9.3	7:30	4:46
28	9.3	7:30	4:46
29	9.3	7:31	4:47
30	9.3	7:31	4:48
31	9.3	7:31	4:48

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.02 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.02 kWh/m² to a high of 8.21 kWh/m² in July across the year — December's 2.02 kWh/m² sits near the bottom.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	2.1	2.1	2.1	2.1	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	1.9	1.9	1.9	1.9	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	2.1	Moderate
2	2.1	Moderate
3	2.1	Moderate
4	2.1	Moderate
5	2.0	Moderate
6	2.0	Moderate
7	2.0	Moderate
8	2.0	Moderate
9	2.0	Dim
10	2.0	Dim
11	2.0	Dim
12	2.0	Dim
13	1.9	Dim
14	1.9	Dim
15	1.9	Dim
16	1.9	Dim
17	2.0	Dim
18	2.0	Dim
19	2.0	Dim
20	2.0	Dim
21	2.0	Dim
22	2.0	Dim
23	2.0	Moderate
24	2.0	Moderate
25	2.0	Moderate
26	2.0	Moderate
27	2.0	Moderate
28	2.0	Moderate
29	2.0	Moderate
30	2.0	Moderate
31	2.0	Moderate

Planning a trip in December

Hazard calendar for South Yuba City

In seasonPeak

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

South Yuba 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 South Yuba City?

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

4.4

Sightseeing

9th-best month of the year

0.2

Beach & pool

12th-best month of the year

December is a reasonable time to visit South Yuba City for sightseeing.

What to pack for South Yuba City in December

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

In December, South Yuba City sees daytime highs around 58°F and nights near 42°F. Worth packing: a warm layer and rain gear. About 10 days see rain.

a warm layerrain gear

UV index in South Yuba 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 South Yuba City peaks around June 22 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 2 (low).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	3	4	6	8	10	10	9	6	5	2	2
Level	Moderate	Moderate	Moderate	High	Very high	Very high	Very high	Very high	High	Moderate	Low	Low

	UV index (midday)	Level
Jan	2	Moderate
Feb	3	Moderate
Mar	4	Moderate
Apr	6	High
May	8	Very high
Jun	10	Very high
Jul	10	Very high
Aug	9	Very high
Sep	6	High
Oct	5	Moderate
Nov	2	Low
Dec	2	Low

Air quality in South Yuba 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 South Yuba City is worst in September — around 41 µg/m³ PM2.5 (poor), about 3.8× the cleanest month (June, 11 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	13	15	18	15	11	11	21	37	41	21	31	13
Level	Moderate	Moderate	Moderate	Moderate	Good	Good	Moderate	Poor	Poor	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	13	Moderate
Feb	15	Moderate
Mar	18	Moderate
Apr	15	Moderate
May	11	Good
Jun	11	Good
Jul	21	Moderate
Aug	37	Poor
Sep	41	Poor
Oct	21	Moderate
Nov	31	Moderate
Dec	13	Moderate

Location & terrain

Where is South Yuba City?

South Yuba City sits at 39.1°N, 121.6°W, 52 ft above sea level, in United States. The nearest listed city is Yuba City, 1.9 mi away.

Topography around South Yuba City

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

Within 2 miles, the terrain around South Yuba City has only modest variations in elevation — a maximum elevation change of 49 ft around an average of 56 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,040 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 5,538 ft.

The land around South Yuba City is covered by artificial surfaces (44%) and trees (35%) within 2 miles, cropland (40%), grassland (28%) and trees (22%) within 10 miles, and trees (43%), grassland (28%) and cropland (22%) within 50 miles.

2 miles

49 ft

artificial surfaces 44%

10 miles

1,040 ft

cropland 40%

50 miles

5,538 ft

trees 43%

treesgrasslandcroplandartificial surfacesbare terrainwaterwetland

← November South Yuba City year-round climate January →Best places to visit in December

December weather nearby: Yuba City 1.9 mi · Linda 5.0 mi · Lincoln 24 mi · Oroville 28 mi · Woodland 31 mi · Rio Linda 31 mi · Rocklin 31 mi · Roseville 32 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

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 South Yuba City (39.1166°, -121.6391°, elevation 52 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).

	Avg high (°F)	Avg low (°F)
1	61	44
2	61	44
3	60	44
4	60	44
5	60	43
6	60	43
7	60	43
8	59	43
9	59	43
10	59	43
11	59	43
12	58	43
13	58	42
14	58	42
15	58	42
16	58	42
17	58	42
18	58	42
19	57	42
20	57	42
21	57	41
22	57	41
23	57	41
24	57	41
25	57	41
26	57	41
27	57	41
28	57	41
29	57	41
30	57	41
31	57	41

	Clearer (%)	Cloudier (%)
1	51	49
2	50	50
3	50	50
4	48	52
5	47	53
6	46	54
7	46	54
8	45	55
9	44	56
10	44	56
11	43	57
12	43	57
13	43	57
14	44	56
15	44	56
16	44	56
17	45	55
18	45	55
19	46	54
20	47	53
21	47	53
22	48	52
23	48	52
24	47	53
25	47	53
26	46	54
27	46	54
28	46	54
29	46	54
30	46	54
31	45	55

	Rain chance (%)
1	29
2	30
3	30
4	31
5	32
6	33
7	33
8	34
9	34
10	34
11	34
12	34
13	34
14	34
15	33
16	33
17	32
18	31
19	31
20	30
21	30
22	30
23	30
24	29
25	29
26	29
27	29
28	29
29	30
30	30
31	31

	Dry (%)	Comfortable (%)
1	98	2
2	98	2
3	98	2
4	98	2
5	98	2
6	98	2
7	98	2
8	98	2
9	98	2
10	98	2
11	98	2
12	98	2
13	98	2
14	99	1
15	99	1
16	99	1
17	99	1
18	99	1
19	99	1
20	99	1
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	98	2
27	98	2
28	98	2
29	98	2
30	98	2
31	98	2

	Avg high (°F)	Avg low (°F)
1	61	44
2	61	44
3	60	44
4	60	44
5	60	43
6	60	43
7	60	43
8	59	43
9	59	43
10	59	43
11	59	43
12	58	43
13	58	42
14	58	42
15	58	42
16	58	42
17	58	42
18	58	42
19	57	42
20	57	42
21	57	41
22	57	41
23	57	41
24	57	41
25	57	41
26	57	41
27	57	41
28	57	41
29	57	41
30	57	41
31	57	41

	Clearer (%)	Cloudier (%)
1	51	49
2	50	50
3	50	50
4	48	52
5	47	53
6	46	54
7	46	54
8	45	55
9	44	56
10	44	56
11	43	57
12	43	57
13	43	57
14	44	56
15	44	56
16	44	56
17	45	55
18	45	55
19	46	54
20	47	53
21	47	53
22	48	52
23	48	52
24	47	53
25	47	53
26	46	54
27	46	54
28	46	54
29	46	54
30	46	54
31	45	55

	Rain chance (%)
1	29
2	30
3	30
4	31
5	32
6	33
7	33
8	34
9	34
10	34
11	34
12	34
13	34
14	34
15	33
16	33
17	32
18	31
19	31
20	30
21	30
22	30
23	30
24	29
25	29
26	29
27	29
28	29
29	30
30	30
31	31

	Dry (%)	Comfortable (%)
1	98	2
2	98	2
3	98	2
4	98	2
5	98	2
6	98	2
7	98	2
8	98	2
9	98	2
10	98	2
11	98	2
12	98	2
13	98	2
14	99	1
15	99	1
16	99	1
17	99	1
18	99	1
19	99	1
20	99	1
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	98	2
27	98	2
28	98	2
29	98	2
30	98	2
31	98	2

	Avg high (°F)	Avg low (°F)
1	61	44
2	61	44
3	60	44
4	60	44
5	60	43
6	60	43
7	60	43
8	59	43
9	59	43
10	59	43
11	59	43
12	58	43
13	58	42
14	58	42
15	58	42
16	58	42
17	58	42
18	58	42
19	57	42
20	57	42
21	57	41
22	57	41
23	57	41
24	57	41
25	57	41
26	57	41
27	57	41
28	57	41
29	57	41
30	57	41
31	57	41

	Clearer (%)	Cloudier (%)
1	51	49
2	50	50
3	50	50
4	48	52
5	47	53
6	46	54
7	46	54
8	45	55
9	44	56
10	44	56
11	43	57
12	43	57
13	43	57
14	44	56
15	44	56
16	44	56
17	45	55
18	45	55
19	46	54
20	47	53
21	47	53
22	48	52
23	48	52
24	47	53
25	47	53
26	46	54
27	46	54
28	46	54
29	46	54
30	46	54
31	45	55

	Rain chance (%)
1	29
2	30
3	30
4	31
5	32
6	33
7	33
8	34
9	34
10	34
11	34
12	34
13	34
14	34
15	33
16	33
17	32
18	31
19	31
20	30
21	30
22	30
23	30
24	29
25	29
26	29
27	29
28	29
29	30
30	30
31	31

	Dry (%)	Comfortable (%)
1	98	2
2	98	2
3	98	2
4	98	2
5	98	2
6	98	2
7	98	2
8	98	2
9	98	2
10	98	2
11	98	2
12	98	2
13	98	2
14	99	1
15	99	1
16	99	1
17	99	1
18	99	1
19	99	1
20	99	1
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	98	2
27	98	2
28	98	2
29	98	2
30	98	2
31	98	2