Guamúchil weather in December

In December, Guamúchil sees average daytime highs of 28°C and overnight lows near 13°C, with 22 mm of rain across 2.1 wet days and about 10.4 hours of daylight. It is the 11th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 29°C in the first days to 27°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 30 min at the start of December to 10 h 24 min by month's end. Set against the rest of the year, December is Guamúchil's 9th-clearest and 7th-windiest month. For the whole year in context, see Guamúchil's year-round climate.

Daytime high
28°
11th warmest
Overnight low
13°
2nd coldest
Rainfall
22 mm
2.1 wet days
Daylight
10 h 24 min
6:56 AM – 5:21 PM
Cloud cover
40%
9th clearest
Wind
6 km/h
7th windiest
Solar energy
4.08 kWh/m²
Travel score
7.4
out of 10

Guamúchil is municipal seat of Salvador Alvarado, State of Sinaloa, Mexico.

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 29°C in the first days to 27°C by the end.

A typical December day in Guamúchil reaches about 28°C in the afternoon and slips back to 13°C overnight — a 16°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 32°C. Set against its neighbours, December runs about 4°C cooler than November and on par with January.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
13014
23014
32914
42914
52914
62914
72913
82913
92913
102913
112813
122813
132813
142813
152813
162812
172812
182812
192812
202812
212812
222812
232712
242712
252712
262712
272712
282712
292712
302812
312812

How December really feels in Guamúchil

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
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.

Guamúchil weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 12°191.910.67.8
Feb29° / 13°161.811.16.7
Mar31° / 14°40.611.85.5
Apr34° / 16°10.312.63.9
May36° / 19°10.313.22.6
Jun37° / 24°152.813.62.0
Jul35° / 25°13015.213.42.0
Aug34° / 25°16617.512.92.3
Sep34° / 25°1311412.22.7
Oct35° / 21°35411.43.1
Nov32° / 16°442.210.85.1
Dec28° / 13°222.110.47.4

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 11% of December, with mostly cloudy or overcast conditions the remaining 34%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16733
26634
36535
46535
56535
66436
76436
86436
96535
106535
116535
126535
136535
146634
156634
166634
176634
186634
196634
206634
216634
226634
236634
246634
256634
266634
276634
286733
296733
306733
316832

Chance of precipitation in December

Any precipitation

Guamúchil gets around 22 mm of rain over 2.1 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 7% and peaks near 8% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
18
28
38
48
57
67
77
87
97
107
116
126
136
146
157
167
177
187
197
207
217
227
237
247
257
267
277
287
296
306
316

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 63% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
152261831
252261831
353251831
454251830
554251830
655251730
755251730
855251730
956251630
1058251520
1157261520
1258261420
1359261320
1460261220
1562261110
1663251110
1764251010
186525910
196625810
206824800
216924700
227024600
237024600
247024600
257124500
267124500
277124500
287124500
297124500
307124500
317223500

Wind in December

Winds average 6 km/h in December.

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

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 30 min at the start of December to 10 h 24 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 6:46 AM to 7:02 AM, and sunset from 5:18 PM to 5:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.56:465:18
210.56:475:18
310.56:485:18
410.56:485:18
510.56:495:18
610.56:505:18
710.56:505:19
810.56:515:19
910.56:525:19
1010.46:525:19
1110.46:535:20
1210.46:535:20
1310.46:545:20
1410.46:555:20
1510.46:555:21
1610.46:565:21
1710.46:565:21
1810.46:575:22
1910.46:575:22
2010.46:585:23
2110.46:585:23
2210.46:595:24
2310.46:595:24
2410.47:005:25
2510.47:005:25
2610.47:015:26
2710.47:015:26
2810.47:015:27
2910.47:025:27
3010.47:025:28
3110.47:025:28

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.08 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.08 kWh/m² to a high of 7.92 kWh/m² in May across the year — December's 4.08 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.2Bright
24.1Bright
34.1Bright
44.1Bright
54.1Bright
64.1Bright
74.0Bright
84.0Bright
94.0Bright
104.0Bright
114.0Bright
124.0Bright
134.0Bright
144.0Bright
154.0Bright
164.0Bright
174.0Bright
184.0Bright
194.0Bright
204.0Bright
214.0Bright
224.1Bright
234.1Bright
244.1Bright
254.1Bright
264.1Bright
274.1Bright
284.2Bright
294.2Bright
304.2Bright
314.2Bright
Planning a trip in December

Hazard calendar for Guamúchil

In seasonPeak

None of Guamúchil's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Guamúchil sits in the eastern Pacific hurricane zone; the season peaks August–September.

Guamúchil's rainy season runs July–September, when most of the year's rain falls.

Pacific hurricane
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Guamúchil?

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

7.4
Sightseeing
2nd-best month of the year
8.4
Beach & pool
3rd-best month of the year

December is one of the better times to visit Guamúchil for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Guamúchil in December

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

In December, Guamúchil sees daytime highs around 28°C and nights near 13°C. Pack light clothes.

light clothes

Sea temperature near Guamúchil in December

The nearest coast averages about 22°C 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 48 km away) is warmest in August at about 30°C and coldest in February near 20°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan20Refreshing
Feb20Refreshing
Mar20Refreshing
Apr22Refreshing
May25Warm
Jun28Warm
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov26Warm
Dec22Refreshing

UV index in Guamúchil in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Guamúchil peaks around July 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJul 17UV 12Dec 19UV 5
UV index (midday)Level
Jan6High
Feb7High
Mar9Very high
Apr11Extreme
May12Extreme
Jun11Extreme
Jul12Extreme
Aug11Extreme
Sep10Extreme
Oct8Very high
Nov6High
Dec5Moderate

Air quality in Guamúchil 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 Guamúchil is worst in May — around 20 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (January, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1919 µg/m³Jan 148 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar10Good
Apr11Good
May20Moderate
Jun16Moderate
Jul14Moderate
Aug11Good
Sep11Good
Oct10Good
Nov9Good
Dec8Good
Location & terrain

Where is Guamúchil?

Guamúchil sits at 25.5°N, 108.1°W, 46 m above sea level, in Mexico. The nearest listed city is Guasave, 41 km away.

Topography around Guamúchil

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

Within 3 km, the terrain around Guamúchil has only modest variations in elevation — a maximum elevation change of 118 m around an average of 54 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 615 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,277 m.

The land around Guamúchil is covered by artificial surfaces (41%) within 3 km, cropland (56%) within 16 km, and trees (37%) and cropland (27%) within 80 km.

3 km
118 m
16 km
615 m
80 km
2,277 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwatermangroves
December weather nearby: Guasave 41 km · Gabriel Leyva Solano 60 km · Juan José Ríos 82 km · Navolato 86 km · Los Mochis 99 km · Culiacán 100 km · Licenciado Benito Juárez 104 km · Costa Rica 119 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
Catholic 78%no religion 11%other Evangelical Churches 8%Jehovah Witness 1%

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 Guamúchil (25.4587°, -108.0773°, elevation 46 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).