Santa Rosa weather in December

In December, Santa Rosa sees average daytime highs of 23°C and overnight lows near 16°C, with 433 mm of rain across 30.2 wet days and about 12.6 hours of daylight. It is the 7th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 0% of the time in December, and the air most often feels humid.

Daylight stretches from about 12 h 36 min at the start of December to 12 h 36 min by month's end. Set against the rest of the year, December is Santa Rosa's 11th-clearest and 5th-windiest month. For the whole year in context, see Santa Rosa's year-round climate.

Daytime high: 23°; 7th warmest
Overnight low: 16°; 12th coldest
Rainfall: 433 mm; 30.2 wet days
Daylight: 12 h 36 min; 5:37 AM – 6:15 PM
Cloud cover: 91%; 11th clearest
Wind: 3 km/h; 5th windiest
Solar energy: 4.33 kWh/m²
Travel score: 3.5; out of 10

← November Santa Rosa 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

Day-to-day highs hold fairly steady near 23°C through the month.

A typical December day in Santa Rosa reaches about 23°C in the afternoon and slips back to 16°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 25°C. Set against its neighbours, December runs on par with 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 (°C)	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23
Avg low (°C)	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16

	Avg high (°C)	Avg low (°C)
1	23	16
2	23	16
3	23	16
4	23	16
5	23	16
6	23	16
7	23	16
8	23	16
9	23	16
10	23	16
11	23	16
12	23	16
13	23	16
14	23	16
15	23	16
16	23	16
17	23	16
18	23	16
19	23	16
20	23	16
21	23	16
22	23	16
23	23	16
24	23	16
25	23	16
26	23	16
27	23	16
28	23	16
29	23	16
30	23	16
31	23	16

Santa Rosa weather by month

How December compares with the rest of the year at a glance. December is the 7th-warmest and 3rd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	23° / 16°	481	30.3	12.6	3.5
Feb	23° / 16°	443	27.5	12.4	3.4
Mar	23° / 16°	337	30	12.1	3.6
Apr	24° / 15°	220	27.6	11.8	3.9
May	23° / 15°	153	25.4	11.5	4.4
Jun	23° / 14°	98	19.7	11.4	5.3
Jul	23° / 13°	82	16.4	11.4	5.9
Aug	23° / 13°	89	17.4	11.6	5.9
Sep	24° / 14°	134	22	11.9	5.0
Oct	24° / 15°	231	28.5	12.2	3.9
Nov	24° / 16°	317	28.6	12.5	3.6
Dec	23° / 16°	433	30.2	12.6	3.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 3% of December, with mostly cloudy or overcast conditions the remaining 97%.

	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 (%)	2	2	2	2	2	2	2	2	3	3	3	3	3	3	4	4	4	4	4	4	4	4	4	3	3	3	3	2	2	2	2
Cloudier (%)	98	98	98	98	98	98	98	98	97	97	97	97	97	97	96	96	96	96	96	96	96	96	96	97	97	97	97	98	98	98	98

	Clearer (%)	Cloudier (%)
1	2	98
2	2	98
3	2	98
4	2	98
5	2	98
6	2	98
7	2	98
8	2	98
9	3	97
10	3	97
11	3	97
12	3	97
13	3	97
14	3	97
15	4	96
16	4	96
17	4	96
18	4	96
19	4	96
20	4	96
21	4	96
22	4	96
23	4	96
24	3	97
25	3	97
26	3	97
27	3	97
28	2	98
29	2	98
30	2	98
31	2	98

Chance of precipitation in December

Any precipitation

Santa Rosa gets around 433 mm of rain over 30.2 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 98% and peaks near 98% 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 (%)	98	98	98	98	98	98	98	98	98	98	98	98	98	98	97	97	97	97	97	97	97	97	97	97	97	97	97	97	98	98	98

	Rain chance (%)
1	98
2	98
3	98
4	98
5	98
6	98
7	98
8	98
9	98
10	98
11	98
12	98
13	98
14	98
15	97
16	97
17	97
18	97
19	97
20	97
21	97
22	97
23	97
24	97
25	97
26	97
27	97
28	97
29	98
30	98
31	98

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the humid band about 97% 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
Comfortable (%)	2	1	1	1	1	1	1	1	1	1	1	2	2	2	2	2	2	2	2	3	3	2	2	2	2	2	2	2	2	2	2
Humid (%)	96	97	97	97	97	98	98	98	98	98	98	97	97	97	97	97	97	97	97	96	96	97	97	97	97	97	97	97	97	97	97
Muggy (%)	2	2	2	2	2	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1

	Comfortable (%)	Humid (%)	Muggy (%)
1	2	96	2
2	1	97	2
3	1	97	2
4	1	97	2
5	1	97	2
6	1	98	1
7	1	98	1
8	1	98	1
9	1	98	1
10	1	98	1
11	1	98	1
12	2	97	1
13	2	97	1
14	2	97	1
15	2	97	1
16	2	97	1
17	2	97	1
18	2	97	1
19	2	97	1
20	3	96	1
21	3	96	1
22	2	97	1
23	2	97	1
24	2	97	1
25	2	97	1
26	2	97	1
27	2	97	1
28	2	97	1
29	2	97	1
30	2	97	1
31	2	97	1

Wind in December

Winds average 3 km/h in December.

Across December, daily wind ranges from about 3 km/h on the calmest days to 3 km/h 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 (km/h)	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3
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 (km/h)	Feels
1	3	calm
2	3	calm
3	3	calm
4	3	calm
5	3	calm
6	3	calm
7	3	calm
8	3	calm
9	3	calm
10	3	calm
11	3	calm
12	3	calm
13	3	calm
14	3	calm
15	3	calm
16	3	calm
17	3	calm
18	3	calm
19	3	calm
20	3	calm
21	3	calm
22	3	calm
23	3	calm
24	3	calm
25	3	calm
26	3	calm
27	3	calm
28	3	calm
29	3	calm
30	3	calm
31	3	calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 36 min at the start of December to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 5:31 AM to 5:44 AM, and sunset from 6:07 PM to 6:22 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)	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6	12.6
Sunrise (AM)	5:31	5:32	5:32	5:32	5:33	5:33	5:33	5:34	5:34	5:34	5:35	5:35	5:35	5:36	5:36	5:37	5:37	5:37	5:38	5:38	5:39	5:39	5:40	5:40	5:41	5:41	5:42	5:42	5:43	5:43	5:44
Sunset (PM)	6:07	6:08	6:08	6:09	6:09	6:10	6:10	6:11	6:11	6:12	6:12	6:13	6:13	6:14	6:14	6:15	6:15	6:16	6:16	6:17	6:17	6:18	6:18	6:19	6:19	6:20	6:20	6:20	6:21	6:21	6:22

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.6	5:31	6:07
2	12.6	5:32	6:08
3	12.6	5:32	6:08
4	12.6	5:32	6:09
5	12.6	5:33	6:09
6	12.6	5:33	6:10
7	12.6	5:33	6:10
8	12.6	5:34	6:11
9	12.6	5:34	6:11
10	12.6	5:34	6:12
11	12.6	5:35	6:12
12	12.6	5:35	6:13
13	12.6	5:35	6:13
14	12.6	5:36	6:14
15	12.6	5:36	6:14
16	12.6	5:37	6:15
17	12.6	5:37	6:15
18	12.6	5:37	6:16
19	12.6	5:38	6:16
20	12.6	5:38	6:17
21	12.6	5:39	6:17
22	12.6	5:39	6:18
23	12.6	5:40	6:18
24	12.6	5:40	6:19
25	12.6	5:41	6:19
26	12.6	5:41	6:20
27	12.6	5:42	6:20
28	12.6	5:42	6:20
29	12.6	5:43	6:21
30	12.6	5:43	6:21
31	12.6	5:44	6:22

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.33 kWh/m².

For context, solar energy here swings from a low near 4.11 kWh/m² to a high of 5.29 kWh/m² in September across the year — December's 4.33 kWh/m² falls in the middle.

	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)	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.4	Bright
2	4.4	Bright
3	4.4	Bright
4	4.4	Bright
5	4.4	Bright
6	4.4	Bright
7	4.4	Bright
8	4.3	Bright
9	4.3	Bright
10	4.3	Bright
11	4.3	Bright
12	4.3	Bright
13	4.3	Bright
14	4.3	Bright
15	4.3	Bright
16	4.3	Bright
17	4.3	Bright
18	4.3	Bright
19	4.3	Bright
20	4.3	Bright
21	4.3	Bright
22	4.3	Bright
23	4.3	Bright
24	4.3	Bright
25	4.3	Bright
26	4.3	Bright
27	4.3	Bright
28	4.3	Bright
29	4.3	Bright
30	4.3	Bright
31	4.3	Bright

Planning a trip in December

Hazard calendar for Santa Rosa

In seasonPeak

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

Santa Rosa's rainy season runs October–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 Santa Rosa?

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

3.5

Sightseeing

10th-best month of the year

2.8

Beach & pool

10th-best month of the year

December is a weaker month for outdoor sightseeing in Santa Rosa.

What to pack for Santa Rosa in December

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

In December, Santa Rosa sees daytime highs around 23°C and nights near 16°C. Pack rain gear. Worth having: light clothes. About 30 days see rain.

rain gearlight clothes

UV index in Santa Rosa in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 15 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Santa Rosa peaks around February 11 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 13 at about 9 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	16	16	15	13	12	10	10	11	8	14	14	15
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Extreme	Very high	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	16	Extreme
Feb	16	Extreme
Mar	15	Extreme
Apr	13	Extreme
May	12	Extreme
Jun	10	Very high
Jul	10	Very high
Aug	11	Extreme
Sep	8	Very high
Oct	14	Extreme
Nov	14	Extreme
Dec	15	Extreme

Air quality in Santa Rosa 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 Santa Rosa is worst in September — around 29 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (May, 9 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)	9	10	11	10	9	9	15	29	29	13	10	9
Level	Good	Good	Good	Good	Good	Good	Moderate	Moderate	Moderate	Moderate	Good	Good

	PM2.5 (µg/m³)	Level
Jan	9	Good
Feb	10	Good
Mar	11	Good
Apr	10	Good
May	9	Good
Jun	9	Good
Jul	15	Moderate
Aug	29	Moderate
Sep	29	Moderate
Oct	13	Moderate
Nov	10	Good
Dec	9	Good

Location & terrain

Where is Santa Rosa?

Santa Rosa sits at 10.9°S, 74.9°W, 524 m above sea level, in Peru. The nearest listed city is Satipo, 46 km away.

Topography around Santa Rosa

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santa Rosa.

Within 3 km, the terrain around Santa Rosa has significant variations in elevation — a maximum elevation change of 565 m around an average of 617 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,346 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,742 m.

The land around Santa Rosa is covered by trees (63%) within 3 km, trees (91%) within 16 km, and trees (89%) within 80 km.

3 km

565 m

trees 63%

16 km

1,346 m

trees 91%

80 km

4,742 m

trees 89%

treesgrasslandartificial surfacesbare terrainwater

← November Santa Rosa year-round climate January →Best places to visit in December

December weather nearby: Satipo 46 km · San Martín de Pangoa 71 km · Tarma 104 km · Jauja 116 km · Junín 124 km · Atalaya 125 km · La Oroya 129 km · Huancayo 133 km

Peru travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type A / B / C; 220 V · 60 Hz
Prices: ≈ 51% of US; price level, 2025
GDP per capita: $9,684; 2025
Happiness: 6.0 / 10; World Happiness, 2025
Safe drinking water: 49%; of population, 2024
Homicide rate: 8.6; per 100k, 2021
Road deaths: 13.6; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Moderate; EF EPI 519
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 Santa Rosa (-10.9191°, -74.885°, elevation 524 m), 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 (°C)	Avg low (°C)
1	23	16
2	23	16
3	23	16
4	23	16
5	23	16
6	23	16
7	23	16
8	23	16
9	23	16
10	23	16
11	23	16
12	23	16
13	23	16
14	23	16
15	23	16
16	23	16
17	23	16
18	23	16
19	23	16
20	23	16
21	23	16
22	23	16
23	23	16
24	23	16
25	23	16
26	23	16
27	23	16
28	23	16
29	23	16
30	23	16
31	23	16

	Clearer (%)	Cloudier (%)
1	2	98
2	2	98
3	2	98
4	2	98
5	2	98
6	2	98
7	2	98
8	2	98
9	3	97
10	3	97
11	3	97
12	3	97
13	3	97
14	3	97
15	4	96
16	4	96
17	4	96
18	4	96
19	4	96
20	4	96
21	4	96
22	4	96
23	4	96
24	3	97
25	3	97
26	3	97
27	3	97
28	2	98
29	2	98
30	2	98
31	2	98

	Rain chance (%)
1	98
2	98
3	98
4	98
5	98
6	98
7	98
8	98
9	98
10	98
11	98
12	98
13	98
14	98
15	97
16	97
17	97
18	97
19	97
20	97
21	97
22	97
23	97
24	97
25	97
26	97
27	97
28	97
29	98
30	98
31	98

	Comfortable (%)	Humid (%)	Muggy (%)
1	2	96	2
2	1	97	2
3	1	97	2
4	1	97	2
5	1	97	2
6	1	98	1
7	1	98	1
8	1	98	1
9	1	98	1
10	1	98	1
11	1	98	1
12	2	97	1
13	2	97	1
14	2	97	1
15	2	97	1
16	2	97	1
17	2	97	1
18	2	97	1
19	2	97	1
20	3	96	1
21	3	96	1
22	2	97	1
23	2	97	1
24	2	97	1
25	2	97	1
26	2	97	1
27	2	97	1
28	2	97	1
29	2	97	1
30	2	97	1
31	2	97	1

	Avg high (°C)	Avg low (°C)
1	23	16
2	23	16
3	23	16
4	23	16
5	23	16
6	23	16
7	23	16
8	23	16
9	23	16
10	23	16
11	23	16
12	23	16
13	23	16
14	23	16
15	23	16
16	23	16
17	23	16
18	23	16
19	23	16
20	23	16
21	23	16
22	23	16
23	23	16
24	23	16
25	23	16
26	23	16
27	23	16
28	23	16
29	23	16
30	23	16
31	23	16

	Clearer (%)	Cloudier (%)
1	2	98
2	2	98
3	2	98
4	2	98
5	2	98
6	2	98
7	2	98
8	2	98
9	3	97
10	3	97
11	3	97
12	3	97
13	3	97
14	3	97
15	4	96
16	4	96
17	4	96
18	4	96
19	4	96
20	4	96
21	4	96
22	4	96
23	4	96
24	3	97
25	3	97
26	3	97
27	3	97
28	2	98
29	2	98
30	2	98
31	2	98

	Rain chance (%)
1	98
2	98
3	98
4	98
5	98
6	98
7	98
8	98
9	98
10	98
11	98
12	98
13	98
14	98
15	97
16	97
17	97
18	97
19	97
20	97
21	97
22	97
23	97
24	97
25	97
26	97
27	97
28	97
29	98
30	98
31	98

	Comfortable (%)	Humid (%)	Muggy (%)
1	2	96	2
2	1	97	2
3	1	97	2
4	1	97	2
5	1	97	2
6	1	98	1
7	1	98	1
8	1	98	1
9	1	98	1
10	1	98	1
11	1	98	1
12	2	97	1
13	2	97	1
14	2	97	1
15	2	97	1
16	2	97	1
17	2	97	1
18	2	97	1
19	2	97	1
20	3	96	1
21	3	96	1
22	2	97	1
23	2	97	1
24	2	97	1
25	2	97	1
26	2	97	1
27	2	97	1
28	2	97	1
29	2	97	1
30	2	97	1
31	2	97	1

	Avg high (°C)	Avg low (°C)
1	23	16
2	23	16
3	23	16
4	23	16
5	23	16
6	23	16
7	23	16
8	23	16
9	23	16
10	23	16
11	23	16
12	23	16
13	23	16
14	23	16
15	23	16
16	23	16
17	23	16
18	23	16
19	23	16
20	23	16
21	23	16
22	23	16
23	23	16
24	23	16
25	23	16
26	23	16
27	23	16
28	23	16
29	23	16
30	23	16
31	23	16

	Clearer (%)	Cloudier (%)
1	2	98
2	2	98
3	2	98
4	2	98
5	2	98
6	2	98
7	2	98
8	2	98
9	3	97
10	3	97
11	3	97
12	3	97
13	3	97
14	3	97
15	4	96
16	4	96
17	4	96
18	4	96
19	4	96
20	4	96
21	4	96
22	4	96
23	4	96
24	3	97
25	3	97
26	3	97
27	3	97
28	2	98
29	2	98
30	2	98
31	2	98

	Rain chance (%)
1	98
2	98
3	98
4	98
5	98
6	98
7	98
8	98
9	98
10	98
11	98
12	98
13	98
14	98
15	97
16	97
17	97
18	97
19	97
20	97
21	97
22	97
23	97
24	97
25	97
26	97
27	97
28	97
29	98
30	98
31	98

	Comfortable (%)	Humid (%)	Muggy (%)
1	2	96	2
2	1	97	2
3	1	97	2
4	1	97	2
5	1	97	2
6	1	98	1
7	1	98	1
8	1	98	1
9	1	98	1
10	1	98	1
11	1	98	1
12	2	97	1
13	2	97	1
14	2	97	1
15	2	97	1
16	2	97	1
17	2	97	1
18	2	97	1
19	2	97	1
20	3	96	1
21	3	96	1
22	2	97	1
23	2	97	1
24	2	97	1
25	2	97	1
26	2	97	1
27	2	97	1
28	2	97	1
29	2	97	1
30	2	97	1
31	2	97	1