El Rosario weather in January

In January, El Rosario sees average daytime highs of 26°C and overnight lows near 13°C, with 20 mm of rain across 2.1 wet days and about 10.7 hours of daylight. It is the 12th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 56% of the time in January, and the air most often feels comfortable.

Daylight stretches from about 10 h 36 min at the start of January to 10 h 54 min by month's end. Set against the rest of the year, January is El Rosario's 6th-clearest and 6th-windiest month. For the whole year in context, see El Rosario's year-round climate.

Daytime high
26°
12th warmest
Overnight low
13°
1st coldest
Rainfall
20 mm
2.1 wet days
Daylight
10 h 42 min
6:51 AM – 5:35 PM
Cloud cover
40%
6th clearest
Wind
5 km/h
6th windiest
Solar energy
4.55 kWh/m²
Travel score
8.1
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical January day in El Rosario reaches about 26°C in the afternoon and slips back to 13°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 29°C. Set against its neighbours, January runs on par with December and about 1°C cooler than February.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12613
22613
32613
42613
52613
62613
72613
82613
92613
102613
112613
122613
132613
142613
152613
162613
172613
182613
192613
202613
212613
222713
232713
242713
252713
262713
272713
282713
292713
302713
312713

How January really feels in El Rosario

Once humidity and wind are folded in, January 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

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

El Rosario weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 13°202.110.78.1
Feb27° / 13°191.411.28.1
Mar29° / 14°50.611.87.4
Apr30° / 16°10.212.56.3
May32° / 19°30.513.15.2
Jun32° / 23°709.313.44.1
Jul31° / 23°2362413.33.0
Aug30° / 23°28126.112.82.9
Sep30° / 23°24424.312.13.2
Oct30° / 21°9211.311.55.0
Nov29° / 17°302.610.96.9
Dec27° / 14°182.310.68.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 10% of January, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26634
36634
46535
56535
66535
76535
86535
96535
106535
116634
126634
136634
146634
156733
166733
176832
186832
196832
206931
216832
226832
236931
246931
256931
266931
276832
286832
296733
306733
316733

Chance of precipitation in January

Any precipitation

El Rosario gets around 20 mm of rain over 2.1 wet days in January. 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
147
157
167
177
187
197
207
217
227
237
247
257
267
277
287
297
307
317

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the comfortable band about 50% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12548261
22548261
32648261
42648251
52748241
62848241
72848231
82948221
93048221
103148211
113148201
123248201
133248190
143248190
153249190
163149190
173150190
183051190
192952190
202852200
212852200
222753200
232753200
242654200
252654200
262654200
272654200
282654200
292654200
302654200
312654200

Wind in January

Winds average 5 km/h in January.

Across January, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 10 h 36 min at the start of January to 10 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over January. Sunrise moves from 6:48 AM to 6:49 AM, and sunset from 5:25 PM to 5:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.66:485:25
210.66:495:25
310.66:495:26
410.66:495:27
510.66:495:27
610.66:505:28
710.66:505:29
810.76:505:29
910.76:505:30
1010.76:505:31
1110.76:505:31
1210.76:515:32
1310.76:515:33
1410.76:515:33
1510.76:515:34
1610.76:515:35
1710.76:515:35
1810.86:515:36
1910.86:515:37
2010.86:515:37
2110.86:515:38
2210.86:515:39
2310.86:505:39
2410.86:505:40
2510.86:505:41
2610.96:505:41
2710.96:505:42
2810.96:495:43
2910.96:495:44
3010.96:495:44
3110.96:495:45

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.55 kWh/m².

For context, solar energy here swings from a low near 4.33 kWh/m² to a high of 7.68 kWh/m² in May across the year — January's 4.55 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.5Bright
94.5Bright
104.5Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.5Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.6Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in January

Hazard calendar for El Rosario

In seasonPeak

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

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

El Rosario's monsoon runs July–September, when most of the year's rain falls.

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

Is January a good time to visit El Rosario?

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

8.1
Sightseeing
1st-best month of the year
7.9
Beach & pool
7th-best month of the year

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

What to pack for El Rosario in January

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

In January, El Rosario sees daytime highs around 26°C and nights near 13°C. Worth packing: light clothes and sun protection.

light clothessun protection

Sea temperature near El Rosario in January

The nearest coast averages about 24°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 31 km away) is warmest in August at about 30°C and coldest in March near 23°C.

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

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan24Refreshing
Feb23Refreshing
Mar23Refreshing
Apr23Refreshing
May26Warm
Jun28Warm
Jul29Tropical
Aug30Tropical
Sep30Tropical
Oct30Tropical
Nov28Warm
Dec25Warm

UV index in El Rosario in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January 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 El Rosario peaks around May 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighMay 17UV 12Dec 20UV 6
UV index (midday)Level
Jan6High
Feb9Very high
Mar10Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep11Extreme
Oct8Very high
Nov6High
Dec6High

Air quality in El Rosario in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in El Rosario is worst in May — around 22 µg/m³ PM2.5 (moderate), about 3.8× the cleanest month (January, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1821 µg/m³Jan 166 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb6Good
Mar7Good
Apr11Good
May22Moderate
Jun14Moderate
Jul8Good
Aug8Good
Sep9Good
Oct8Good
Nov7Good
Dec6Good
Location & terrain

Where is El Rosario?

El Rosario sits at 23.0°N, 105.9°W, 33 m above sea level, in Mexico. The nearest listed city is Escuinapa de Hidalgo, 19 km away.

Topography around El Rosario

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

Within 3 km, the terrain around El Rosario has only modest variations in elevation — a maximum elevation change of 222 m around an average of 42 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 915 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,912 m.

The land around El Rosario is covered by trees (43%) and cropland (25%) within 3 km, trees (68%) within 16 km, and trees (59%) and water (25%) within 80 km.

3 km
222 m
16 km
915 m
80 km
2,912 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwatermangroves
January weather nearby: Escuinapa de Hidalgo 19 km · Mazatlan 63 km · Pueblo Nuevo 66 km · Acaponeta 75 km · El Salto 101 km · Tuxpan 130 km · Santiago Ixcuintla 147 km · La Cruz 148 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 El Rosario (22.9903°, -105.8542°, elevation 33 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).