Loreto weather in December

In December, Loreto sees average daytime highs of 21°C and overnight lows near 6°C, with 7 mm of rain across 1.1 wet days and about 10.7 hours of daylight. It is the 11th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 20°C by the end. The sky is clear or mostly clear about 55% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 42 min at the start of December to 10 h 42 min by month's end. Set against the rest of the year, December is Loreto's 6th-clearest and 10th-windiest month. For the whole year in context, see Loreto's year-round climate.

Daytime high: 21°; 11th warmest
Overnight low: 6°; 2nd coldest
Rainfall: 7 mm; 1.1 wet days
Daylight: 10 h 36 min; 7:25 AM – 6:03 PM
Cloud cover: 41%; 6th clearest
Wind: 10 km/h; 10th windiest
Solar energy: 4.68 kWh/m²
Travel score: 8.2; out of 10

Loreto is human settlement in Zacatecas, Mexico.

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

← November Loreto 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 22°C in the first days to 20°C by the end.

A typical December day in Loreto reaches about 21°C in the afternoon and slips back to 6°C overnight — a 15°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 24°C. Set against its neighbours, December runs about 2°C 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 (°C)	22	22	22	22	22	22	22	22	22	22	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	20	20	20	20	20	20
Avg low (°C)	7	7	7	7	7	7	7	7	7	7	7	7	7	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6

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

Loreto weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 10th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	21° / 6°	14	2.1	10.8	7.9
Feb	23° / 7°	11	1.7	11.2	8.6
Mar	25° / 9°	6	1.3	11.8	8.6
Apr	28° / 12°	5	1.6	12.5	7.6
May	29° / 14°	22	4.9	13.1	6.4
Jun	28° / 15°	70	10	13.3	6.1
Jul	26° / 15°	95	12.1	13.2	6.4
Aug	26° / 15°	80	11.1	12.8	6.5
Sep	25° / 14°	81	11	12.1	6.6
Oct	25° / 12°	30	5.1	11.5	7.9
Nov	23° / 9°	10	1.8	10.9	8.6
Dec	21° / 6°	7	1.1	10.7	8.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 55% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to cloud over as the month goes on.

	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 (%)	76	75	74	73	72	71	71	69	68	68	67	67	67	66	66	66	66	66	66	66	65	65	64	64	64	64	64	64	64	64	65
Cloudier (%)	24	25	26	27	28	29	29	31	32	32	33	33	33	34	34	34	34	34	34	34	35	35	36	36	36	36	36	36	36	36	35

	Clearer (%)	Cloudier (%)
1	76	24
2	75	25
3	74	26
4	73	27
5	72	28
6	71	29
7	71	29
8	69	31
9	68	32
10	68	32
11	67	33
12	67	33
13	67	33
14	66	34
15	66	34
16	66	34
17	66	34
18	66	34
19	66	34
20	66	34
21	65	35
22	65	35
23	64	36
24	64	36
25	64	36
26	64	36
27	64	36
28	64	36
29	64	36
30	64	36
31	65	35

Chance of precipitation in December

Any precipitation

Loreto gets around 7 mm of rain over 1.1 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 4% and peaks near 5% 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 (%)	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	4	4	4	4	4	4	4	4	4	4	5	5	5	5	5

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

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.

	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 (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in December

Winds average 10 km/h in December.

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

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 42 min at the start of December to 10 h 42 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 7:16 AM to 7:31 AM, and sunset from 6:00 PM to 6:11 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)	10.7	10.7	10.7	10.7	10.7	10.7	10.7	10.7	10.7	10.7	10.7	10.7	10.7	10.7	10.6	10.6	10.6	10.6	10.6	10.6	10.6	10.6	10.6	10.6	10.6	10.6	10.6	10.6	10.6	10.7	10.7
Sunrise (AM)	7:16	7:16	7:17	7:18	7:18	7:19	7:19	7:20	7:21	7:21	7:22	7:23	7:23	7:24	7:24	7:25	7:25	7:26	7:26	7:27	7:27	7:28	7:28	7:29	7:29	7:30	7:30	7:30	7:31	7:31	7:31
Sunset (PM)	6:00	6:00	6:00	6:00	6:00	6:01	6:01	6:01	6:01	6:01	6:02	6:02	6:02	6:03	6:03	6:03	6:04	6:04	6:05	6:05	6:06	6:06	6:06	6:07	6:07	6:08	6:09	6:09	6:10	6:10	6:11

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.7	7:16	6:00
2	10.7	7:16	6:00
3	10.7	7:17	6:00
4	10.7	7:18	6:00
5	10.7	7:18	6:00
6	10.7	7:19	6:01
7	10.7	7:19	6:01
8	10.7	7:20	6:01
9	10.7	7:21	6:01
10	10.7	7:21	6:01
11	10.7	7:22	6:02
12	10.7	7:23	6:02
13	10.7	7:23	6:02
14	10.7	7:24	6:03
15	10.6	7:24	6:03
16	10.6	7:25	6:03
17	10.6	7:25	6:04
18	10.6	7:26	6:04
19	10.6	7:26	6:05
20	10.6	7:27	6:05
21	10.6	7:27	6:06
22	10.6	7:28	6:06
23	10.6	7:28	6:06
24	10.6	7:29	6:07
25	10.6	7:29	6:07
26	10.6	7:30	6:08
27	10.6	7:30	6:09
28	10.6	7:30	6:09
29	10.6	7:31	6:10
30	10.7	7:31	6:10
31	10.7	7:31	6:11

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.68 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.68 kWh/m² to a high of 7.7 kWh/m² in May across the year — December's 4.68 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)	4.8	4.8	4.8	4.8	4.8	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7
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	4.8	Bright
2	4.8	Bright
3	4.8	Bright
4	4.8	Bright
5	4.8	Bright
6	4.7	Bright
7	4.7	Bright
8	4.7	Bright
9	4.7	Bright
10	4.7	Bright
11	4.7	Bright
12	4.7	Bright
13	4.7	Bright
14	4.7	Bright
15	4.6	Bright
16	4.6	Bright
17	4.6	Bright
18	4.6	Bright
19	4.6	Bright
20	4.6	Bright
21	4.6	Bright
22	4.6	Bright
23	4.6	Bright
24	4.7	Bright
25	4.7	Bright
26	4.7	Bright
27	4.7	Bright
28	4.7	Bright
29	4.7	Bright
30	4.7	Bright
31	4.7	Bright

Planning a trip in December

Is December a good time to visit Loreto?

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

8.2

Sightseeing

4th-best month of the year

5.1

Beach & pool

11th-best month of the year

December is one of the better times to visit Loreto for general sightseeing.

What to pack for Loreto in December

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

In December, Loreto sees daytime highs around 21°C and nights near 6°C. Worth packing: a warm layer and sun protection.

a warm layersun protection

UV index in Loreto in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Loreto peaks around May 24 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 7 (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)	7	10	12	14	14	14	13	14	13	10	8	7
Level	Very high	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	High

	UV index (midday)	Level
Jan	7	Very high
Feb	10	Extreme
Mar	12	Extreme
Apr	14	Extreme
May	14	Extreme
Jun	14	Extreme
Jul	13	Extreme
Aug	14	Extreme
Sep	13	Extreme
Oct	10	Extreme
Nov	8	Very high
Dec	7	High

Location & terrain

Where is Loreto?

Loreto sits at 22.3°N, 102.0°W, 2,065 m above sea level, in Mexico. The nearest listed city is Pabellón de Arteaga, 33 km away.

Topography around Loreto

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

Within 3 km, the terrain around Loreto has only modest variations in elevation — a maximum elevation change of 82 m around an average of 2,034 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 671 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,290 m.

The land around Loreto is covered by cropland (56%) within 3 km, shrubs (56%) and cropland (33%) within 16 km, and shrubs (55%) and cropland (30%) within 80 km.

3 km

82 m

cropland 56%

16 km

671 m

shrubs 56%

80 km

1,290 m

shrubs 55%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

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

December weather nearby: Pabellón de Arteaga 33 km · Rincón de Romos 35 km · San Francisco de los Romo 37 km · Salinas de Hidalgo 48 km · Jesús María 50 km · Aguascalientes 53 km · Guadalupe 76 km · Zacatecas 82 km

Mexico travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type A / B; 120 / 127 V · 60 Hz
Prices: ≈ 54% of US; price level, 2025
GDP per capita: $13,889; 2025
Happiness: 7.0 / 10; World Happiness, 2025
Safe drinking water: 43%; of population, 2024
Homicide rate: 24.9; per 100k, 2023
Road deaths: 12.8; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Very low; EF EPI 440
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 Loreto (22.2719°, -101.986°, elevation 2,065 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. 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	22	7
2	22	7
3	22	7
4	22	7
5	22	7
6	22	7
7	22	7
8	22	7
9	22	7
10	22	7
11	21	7
12	21	7
13	21	7
14	21	6
15	21	6
16	21	6
17	21	6
18	21	6
19	21	6
20	21	6
21	21	6
22	21	6
23	21	6
24	21	6
25	21	6
26	20	6
27	20	6
28	20	6
29	20	6
30	20	6
31	20	6

	Clearer (%)	Cloudier (%)
1	76	24
2	75	25
3	74	26
4	73	27
5	72	28
6	71	29
7	71	29
8	69	31
9	68	32
10	68	32
11	67	33
12	67	33
13	67	33
14	66	34
15	66	34
16	66	34
17	66	34
18	66	34
19	66	34
20	66	34
21	65	35
22	65	35
23	64	36
24	64	36
25	64	36
26	64	36
27	64	36
28	64	36
29	64	36
30	64	36
31	65	35

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

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

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

	Clearer (%)	Cloudier (%)
1	76	24
2	75	25
3	74	26
4	73	27
5	72	28
6	71	29
7	71	29
8	69	31
9	68	32
10	68	32
11	67	33
12	67	33
13	67	33
14	66	34
15	66	34
16	66	34
17	66	34
18	66	34
19	66	34
20	66	34
21	65	35
22	65	35
23	64	36
24	64	36
25	64	36
26	64	36
27	64	36
28	64	36
29	64	36
30	64	36
31	65	35

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

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

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

	Clearer (%)	Cloudier (%)
1	76	24
2	75	25
3	74	26
4	73	27
5	72	28
6	71	29
7	71	29
8	69	31
9	68	32
10	68	32
11	67	33
12	67	33
13	67	33
14	66	34
15	66	34
16	66	34
17	66	34
18	66	34
19	66	34
20	66	34
21	65	35
22	65	35
23	64	36
24	64	36
25	64	36
26	64	36
27	64	36
28	64	36
29	64	36
30	64	36
31	65	35

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

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100