Río Grande weather in December

In December, Río Grande sees average daytime highs of 21°C and overnight lows near 6°C, with 8 mm of rain across 1.8 wet days and about 10.6 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 36 min at the start of December to 10 h 30 min by month's end. Set against the rest of the year, December is Río Grande's 6th-clearest and 9th-windiest month. For the whole year in context, see Río Grande's year-round climate.

Daytime high: 21°; 11th warmest
Overnight low: 6°; 2nd coldest
Rainfall: 8 mm; 1.8 wet days
Daylight: 10 h 30 min; 7:32 AM – 6:04 PM
Cloud cover: 41%; 6th clearest
Wind: 11 km/h; 9th windiest
Solar energy: 4.54 kWh/m²
Travel score: 8.0; out of 10

Río Grande is Mexican town in the state of Zacatecas.

Founded: 1562

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

← November Río Grande 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 Río Grande 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 16°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	21	21	21	21	21	21	21	21	21	21	21	21	21	20	20	20	20	20	20	20	20	20	20	20	20	20
Avg low (°C)	7	7	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	5	5	5	5	5	5	5	5	5	5	5	5	5	5

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

Río Grande 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	20° / 5°	13	2.4	10.7	7.8
Feb	23° / 7°	11	1.6	11.2	8.5
Mar	25° / 9°	8	1.4	11.8	8.5
Apr	28° / 12°	7	1.6	12.5	7.4
May	30° / 15°	15	3.2	13.1	6.2
Jun	29° / 16°	56	8.5	13.4	6.0
Jul	27° / 16°	78	11.2	13.3	6.4
Aug	27° / 16°	70	10.9	12.8	6.5
Sep	25° / 15°	86	11.8	12.1	6.6
Oct	25° / 12°	28	4.8	11.4	8.1
Nov	23° / 8°	11	2.2	10.8	8.5
Dec	21° / 6°	8	1.8	10.6	8.0

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%.

	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 (%)	70	69	69	67	67	66	66	66	65	66	66	66	66	67	67	67	67	68	68	67	67	66	66	66	66	66	66	66	66	66	65
Cloudier (%)	30	31	31	33	33	34	34	34	35	34	34	34	34	33	33	33	33	32	32	33	33	34	34	34	34	34	34	34	34	34	35

	Clearer (%)	Cloudier (%)
1	70	30
2	69	31
3	69	31
4	67	33
5	67	33
6	66	34
7	66	34
8	66	34
9	65	35
10	66	34
11	66	34
12	66	34
13	66	34
14	67	33
15	67	33
16	67	33
17	67	33
18	68	32
19	68	32
20	67	33
21	67	33
22	66	34
23	66	34
24	66	34
25	66	34
26	66	34
27	66	34
28	66	34
29	66	34
30	66	34
31	65	35

Chance of precipitation in December

Any precipitation

Río Grande gets around 8 mm of rain over 1.8 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 6% and peaks near 7% 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 (%)	6	6	6	6	6	6	5	5	5	5	6	6	6	6	6	6	6	6	6	6	6	6	6	7	7	7	7	7	7	7	7

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

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 11 km/h in December.

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

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 36 min at the start of December to 10 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 7:23 AM to 7:39 AM, and sunset from 6:01 PM to 6:12 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)	10.6	10.6	10.6	10.6	10.6	10.6	10.6	10.6	10.6	10.6	10.6	10.6	10.5	10.5	10.5	10.5	10.5	10.5	10.5	10.5	10.5	10.5	10.5	10.5	10.5	10.5	10.5	10.5	10.5	10.5	10.5
Sunrise (AM)	7:23	7:24	7:24	7:25	7:26	7:26	7:27	7:27	7:28	7:29	7:29	7:30	7:30	7:31	7:32	7:32	7:33	7:33	7:34	7:34	7:35	7:35	7:36	7:36	7:37	7:37	7:37	7:38	7:38	7:39	7:39
Sunset (PM)	6:01	6:01	6:01	6:01	6:01	6:02	6:02	6:02	6:02	6:02	6:03	6:03	6:03	6:04	6:04	6:04	6:05	6:05	6:06	6:06	6:06	6:07	6:07	6:08	6:08	6:09	6:09	6:10	6:11	6:11	6:12

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.6	7:23	6:01
2	10.6	7:24	6:01
3	10.6	7:24	6:01
4	10.6	7:25	6:01
5	10.6	7:26	6:01
6	10.6	7:26	6:02
7	10.6	7:27	6:02
8	10.6	7:27	6:02
9	10.6	7:28	6:02
10	10.6	7:29	6:02
11	10.6	7:29	6:03
12	10.6	7:30	6:03
13	10.5	7:30	6:03
14	10.5	7:31	6:04
15	10.5	7:32	6:04
16	10.5	7:32	6:04
17	10.5	7:33	6:05
18	10.5	7:33	6:05
19	10.5	7:34	6:06
20	10.5	7:34	6:06
21	10.5	7:35	6:06
22	10.5	7:35	6:07
23	10.5	7:36	6:07
24	10.5	7:36	6:08
25	10.5	7:37	6:08
26	10.5	7:37	6:09
27	10.5	7:37	6:09
28	10.5	7:38	6:10
29	10.5	7:38	6:11
30	10.5	7:39	6:11
31	10.5	7:39	6:12

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.54 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.54 kWh/m² to a high of 7.81 kWh/m² in May across the year — December's 4.54 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)	4.7	4.7	4.6	4.6	4.6	4.6	4.6	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.6	4.6	4.6
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	4.7	Bright
2	4.7	Bright
3	4.6	Bright
4	4.6	Bright
5	4.6	Bright
6	4.6	Bright
7	4.6	Bright
8	4.5	Bright
9	4.5	Bright
10	4.5	Bright
11	4.5	Bright
12	4.5	Bright
13	4.5	Bright
14	4.5	Bright
15	4.5	Bright
16	4.5	Bright
17	4.5	Bright
18	4.5	Bright
19	4.5	Bright
20	4.5	Bright
21	4.5	Bright
22	4.5	Bright
23	4.5	Bright
24	4.5	Bright
25	4.5	Bright
26	4.5	Bright
27	4.5	Bright
28	4.5	Bright
29	4.6	Bright
30	4.6	Bright
31	4.6	Bright

Planning a trip in December

Is December a good time to visit Río Grande?

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

8.0

Sightseeing

5th-best month of the year

4.7

Beach & pool

11th-best month of the year

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

What to pack for Río Grande in December

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

In December, Río Grande 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 Río Grande in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Río Grande peaks around May 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 6 (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	11	13	14	14	13	13	12	10	7	6
Level	High	Very high	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	High

	UV index (midday)	Level
Jan	7	High
Feb	10	Very high
Mar	11	Extreme
Apr	13	Extreme
May	14	Extreme
Jun	14	Extreme
Jul	13	Extreme
Aug	13	Extreme
Sep	12	Extreme
Oct	10	Very high
Nov	7	Very high
Dec	6	High

Location & terrain

Where is Río Grande?

Río Grande sits at 23.8°N, 103.0°W, 1,859 m above sea level, in Mexico. The nearest listed city is Juan Aldama, 63 km away.

Topography around Río Grande

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

Within 3 km, the terrain around Río Grande has only modest variations in elevation — a maximum elevation change of 96 m around an average of 1,878 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 396 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,533 m.

The land around Río Grande is covered by shrubs (40%), artificial surfaces (30%) and cropland (20%) within 3 km, shrubs (77%) within 16 km, and shrubs (64%) and cropland (30%) within 80 km.

3 km

96 m

shrubs 40%

16 km

396 m

shrubs 77%

80 km

1,533 m

shrubs 64%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

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

December weather nearby: Juan Aldama 63 km · Sombrerete 66 km · Fresnillo 74 km · Vicente Guerrero 97 km · Víctor Rosales 103 km · Zacatecas 126 km · Guadalupe Victoria 130 km · Jerez de García Salinas 131 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 Río Grande (23.8273°, -103.0341°, elevation 1,859 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	6
4	22	6
5	22	6
6	21	6
7	21	6
8	21	6
9	21	6
10	21	6
11	21	6
12	21	6
13	21	6
14	21	6
15	21	6
16	21	6
17	21	6
18	21	5
19	20	5
20	20	5
21	20	5
22	20	5
23	20	5
24	20	5
25	20	5
26	20	5
27	20	5
28	20	5
29	20	5
30	20	5
31	20	5

	Clearer (%)	Cloudier (%)
1	70	30
2	69	31
3	69	31
4	67	33
5	67	33
6	66	34
7	66	34
8	66	34
9	65	35
10	66	34
11	66	34
12	66	34
13	66	34
14	67	33
15	67	33
16	67	33
17	67	33
18	68	32
19	68	32
20	67	33
21	67	33
22	66	34
23	66	34
24	66	34
25	66	34
26	66	34
27	66	34
28	66	34
29	66	34
30	66	34
31	65	35

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

	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	6
4	22	6
5	22	6
6	21	6
7	21	6
8	21	6
9	21	6
10	21	6
11	21	6
12	21	6
13	21	6
14	21	6
15	21	6
16	21	6
17	21	6
18	21	5
19	20	5
20	20	5
21	20	5
22	20	5
23	20	5
24	20	5
25	20	5
26	20	5
27	20	5
28	20	5
29	20	5
30	20	5
31	20	5

	Clearer (%)	Cloudier (%)
1	70	30
2	69	31
3	69	31
4	67	33
5	67	33
6	66	34
7	66	34
8	66	34
9	65	35
10	66	34
11	66	34
12	66	34
13	66	34
14	67	33
15	67	33
16	67	33
17	67	33
18	68	32
19	68	32
20	67	33
21	67	33
22	66	34
23	66	34
24	66	34
25	66	34
26	66	34
27	66	34
28	66	34
29	66	34
30	66	34
31	65	35

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

	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	6
4	22	6
5	22	6
6	21	6
7	21	6
8	21	6
9	21	6
10	21	6
11	21	6
12	21	6
13	21	6
14	21	6
15	21	6
16	21	6
17	21	6
18	21	5
19	20	5
20	20	5
21	20	5
22	20	5
23	20	5
24	20	5
25	20	5
26	20	5
27	20	5
28	20	5
29	20	5
30	20	5
31	20	5

	Clearer (%)	Cloudier (%)
1	70	30
2	69	31
3	69	31
4	67	33
5	67	33
6	66	34
7	66	34
8	66	34
9	65	35
10	66	34
11	66	34
12	66	34
13	66	34
14	67	33
15	67	33
16	67	33
17	67	33
18	68	32
19	68	32
20	67	33
21	67	33
22	66	34
23	66	34
24	66	34
25	66	34
26	66	34
27	66	34
28	66	34
29	66	34
30	66	34
31	65	35

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

	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