Climate and average weather in Las Rosas

In Las Rosas, the weather is hot, wet, and mostly clear and remarkably steady, with daytime highs holding near hot levels all year. The wettest stretch peaks around September.

Best: early November to late March

Over the course of the year, the temperature in Las Rosas typically varies from 14°C to 29°C, and is rarely below 11°C or above 32°C. April is the hottest month of the year, while December is the coldest.

Based on the travel score, the best time of year to visit Las Rosas for warm-weather activities is from early November to late March.

Hottest
Apr
29°
Coldest
Dec
14°
Wettest
Sep
355 mm
Driest
Feb
3 mm
Rain / yr
1470 mm
131 wet days
Daylight
11.0–13.0 h
shortest–longest
Elevation
1,312 m
16.4°N
Clearest
Feb
24% cloud

Las Rosas is municipal seat of Las Rosas, State of Chiapas, Mexico.

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

Las Rosas weather by month, at a glance

The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.

Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around early November to late March.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Las Rosas, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.

Temperatures in Las Rosas stay fairly even through the year, without a distinct hot or cool season. The warmest month is April, with an average high of 29°C and low of 17°C; the coolest is December, with an average low of 14°C and high of 25°C.

Days typically run about 11°C warmer than nights, with the widest day–night swing (around 14°C) in March.

10°15°20°25°30°35°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2514
Feb2714
Mar2915
Apr2917
May2818
Jun2618
Jul2717
Aug2717
Sep2617
Oct2517
Nov2515
Dec2514

Average hourly temperature in Las Rosas

A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on April afternoons, near 29°C, and coldest before dawn in December, near 14°C.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM

Las Rosas weather by month

Every month at a glance. Click a month for its detailed page.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 14°71.211.18.9
Feb27° / 14°30.511.58.7
Mar29° / 15°9211.97.5
Apr29° / 17°356.112.46.0
May28° / 18°15416.812.85.0
Jun26° / 18°28822.7134.5
Jul27° / 17°12813.812.95.7
Aug27° / 17°22217.412.55.2
Sep26° / 17°35523.812.14.3
Oct25° / 17°2181811.65.5
Nov25° / 15°426.411.27.7
Dec25° / 14°101.8118.7

Chance of rain

How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.

Las Rosas gets about 1470 mm of precipitation a year. On a typical day the chance of rain is often wet, but that rises and falls sharply with the seasons.

The wetter season lasts 6.0 months, from around May 3 to Nov 1, peaking in September at about 81% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Feb 14.

September is the wettest month by volume, with 355 mm over about 24 wet days; February is the driest, with 3 mm.

0%10%20%30%40%50%60%70%80%90%JanFebMarAprMayJunJulAugSepOctNovDecdrierwetterdriermostly drysome rainoften wetvery wetSep 24 · 81%Feb 14 · 2%
Rain on a day (%)Rain days
Jan41
Feb21
Mar62
Apr226
May5517
Jun7323
Jul4714
Aug5617
Sep7824
Oct5818
Nov216
Dec62

Monthly rainfall

Over a full year, Las Rosas collects about 1470 mm of rain across 131 wet days — roughly 122 mm in an average month.

It doesn’t fall evenly. September is the wettest month with 355 mm, while February is the driest at just 3 mm. The three wettest months alone bring about 59% of the year’s total.

050100150200250300350400JanFebMarAprMayJunJulAugSepOctNovDec739351542881282223552184210
Rainfall (mm)Rain days
Jan71
Feb31
Mar92
Apr356
May15417
Jun28823
Jul12814
Aug22217
Sep35524
Oct21818
Nov426
Dec102

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

How often the daytime sky is clear, partly cloudy or overcast.

In Las Rosas, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.

The clearer part of the year begins around November 5 and lasts for 6.0 months, ending around May 6. The clearest month is February, when the sky is clear, mostly clear, or partly cloudy 92% of the time on average.

The cloudier part of the year begins around May 7 and lasts for 6.0 months, ending around November 4. The cloudiest month is September, when it is overcast or mostly cloudy 83% of the time.

0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JanFebMarAprMayJunJulAugSepOctNovDecFeb 15 · 93%Sep 21 · 15%clearmostly clearpartly cloudymostly cloudyovercastclearercloudierclearer
Clearer (%)Cloudier (%)
Jan8911
Feb928
Mar8911
Apr7921
May4357
Jun1981
Jul3169
Aug2773
Sep1783
Oct3268
Nov6832
Dec8416

Daylight, sunrise and sunset

DaylightNight

Hours of daylight through the year, with sunrise and sunset times.

The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around June 10, brings about 13 hours of light; the shortest, around January 1, only 11 hours — a swing of roughly 2 hours.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan11.16:455:52
Feb11.56:406:08
Mar11.96:236:16
Apr12.45:596:21
May12.85:436:29
Jun13.05:416:39
Jul12.95:486:42
Aug12.55:576:30
Sep12.16:016:07
Oct11.66:065:43
Nov11.26:185:31
Dec11.06:355:37

Sunny days

How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.

Las Rosas averages about 12 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 2 and 25 days.

The sunnier stretch runs 5.6 months, from around Nov 7 to Apr 26. The sunniest month is February, with roughly 24 sunny days (brilliant).

The greyest month is September, down near 2 sunny days — about 92% fewer than the February peak.

051015202530JanFebMarAprMayJunJulAugSepOctNovDecsunniergreyersunniergloomymixedbrightbrilliantFeb 2325 daysSep 212 days
Sunny daysSky
Jan23Bright
Feb22Brilliant
Mar23Bright
Apr15Mixed
May6Gloomy
Jun3Gloomy
Jul4Gloomy
Aug4Gloomy
Sep2Gloomy
Oct5Gloomy
Nov15Mixed
Dec21Bright

Humidity comfort

DryComfortableHumidMuggyOppressiveMiserable

Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.

Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.

In Las Rosas, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 6.1 months, from around May 6 to November 6. The muggiest month is September, when the air feels humid, muggy or worse about 87% of the time.

The most comfortable stretch runs from around November 7 to May 5, and February is the most comfortable month — the air is dry or comfortable 100% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecFeb 18 · 100%Sep 25 · 8%muggyhumiddrycomfortablecomfortablehumidcomfortable
Dry (%)Comfortable (%)Humid (%)Muggy (%)
Jan802000
Feb861400
Mar732510
Apr4045150
May1134514
Jun1187110
Jul546472
Aug739505
Sep113789
Oct524656
Nov2647260
Dec563850

Wind

Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.

This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.

Across the year, average wind speed in Las Rosas is typically calm, near 6 km/h, and varies little with the seasons.

The windier part of the year lasts 5.7 months, from around Nov 9 to May 1. The windiest month is March, averaging about 7 km/h (calm).

The calmer part of the year runs from around Aug 9 to Nov 8, with September the calmest month at about 4 km/h.

0510JanFebMarAprMayJunJulAugSepOctNovDecwindiercalmerwindiercalmMar 7 · 7 km/hSep 24 · 4 km/h
Wind speed (km/h)Feels
Jan6calm
Feb7calm
Mar7calm
Apr6calm
May5calm
Jun5calm
Jul6calm
Aug5calm
Sep4calm
Oct4calm
Nov6calm
Dec6calm

Hazard calendar for Las Rosas

In seasonPeak

When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.

Las Rosas's monsoon runs June–June, when most of the year's rain falls.

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

Best time to visit Las Rosas

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Las Rosas throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around mid March, Las Rosas is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.

Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.

The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Las Rosas for general outdoor tourist activities is from early November to late March, with a peak score in the second week of January.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timetravel scoretemperaturecloudsprecipitationJan 12 · 9.0

The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Travel score (0–10)Rating
Jan8.9ideal
Feb8.6ideal
Mar7.4good
Apr6.0good
May5.0fair
Jun4.5fair
Jul5.6good
Aug5.2fair
Sep4.4fair
Oct5.5fair
Nov7.7ideal
Dec8.7ideal

The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Las Rosas for hot-weather activities is from late November to late April, with a peak score in the second week of March.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebeach/pool scoretemperaturecloudsprecipitationMar 13 · 8.9

The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

What to pack for Las Rosas, by month

EssentialRecommendedOptional

Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.

Las Rosas packs about the same all year — highs hold near 29°C. Across the year the things worth having are light clothes and sun protection.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In April, Las Rosas sees daytime highs around 29°C and nights near 17°C. Pack light clothes and sun protection. About 6 days see rain.

UV index (midday) in Las Rosas by month

LowModerateHighVery highExtreme

Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.

Under clear skies, the midday UV index in Las Rosas peaks around April 11 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highApr 11UV 14Dec 15UV 9
UV index (midday)Level
Jan10Very high
Feb13Extreme
Mar14Extreme
Apr15Extreme
May11Extreme
Jun14Extreme
Jul13Extreme
Aug13Extreme
Sep13Extreme
Oct11Extreme
Nov9Very high
Dec9Very high

Average hourly UV index in Las Rosas

LowModerateHighVery highExtreme

Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.

The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

UV falls off far faster than brightness as the sun drops, so even in April the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 6.5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM
UV ≥ 3 (h/day)UV ≥ 6 (h/day)
Jan74.5
Feb7.55.5
Mar86.5
Apr8.56.5
May86
Jun8.56.5
Jul8.56.5
Aug8.56.5
Sep86
Oct7.55.5
Nov6.54.5
Dec6.54

Air quality in Las Rosas by month

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly average.

Air quality in Las Rosas is worst in April — around 57 µg/m³ PM2.5 (unhealthy), about 6.1× the cleanest month (December, 9 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateGoodApr 1955 µg/m³Dec 189 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb16Moderate
Mar33Moderate
Apr57Unhealthy
May45Poor
Jun19Moderate
Jul20Moderate
Aug17Moderate
Sep16Moderate
Oct13Moderate
Nov11Good
Dec9Good
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Las Rosas is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecfrost-free year round
Frost-free chance (%)Frost nights
Jan1000
Feb1000
Mar1000
Apr1000
May1000
Jun1000
Jul1000
Aug1000
Sep1000
Oct1000
Nov1000
Dec1000

Growing degree days

Degree days (base 10°C)Frost-free shaded

Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Las Rosas banks about 4,110 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around April.

01,0002,0003,0004,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan289
Feb291
Mar364
Apr388
May397
Jun358
Jul376
Aug379
Sep345
Oct336
Nov296
Dec290

Solar energy

Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.

Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.

Las Rosas receives about 5.6 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 4.7 and 6.8 kWh/m².

The brighter stretch of the year lasts 3.6 months, from around Feb 9 to May 28. The brightest month is April, averaging about 6.8 kWh/m² (intense).

The dimmest month is October, down near 4.8 kWh/m² — roughly 29% less than the April peak.

012345678JanFebMarAprMayJunJulAugSepOctNovDecdimmerbrighterdimmerdimmoderatebrightintenseApr 116.8 kWhOct 24.7 kWh
Solar energy (kWh/m²)Level
Jan5.0Bright
Feb5.8Bright
Mar6.5Intense
Apr6.8Intense
May6.1Intense
Jun5.3Bright
Jul6.0Intense
Aug5.9Bright
Sep5.0Bright
Oct4.8Bright
Nov4.8Bright
Dec4.8Bright

Where is Las Rosas?

Las Rosas sits at 16.4°N, 92.4°W, 1,312 m above sea level, in Mexico. The nearest listed city is Venustiano Carranza, 21 km away.

Topography around Las Rosas

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

Within 3 km, the terrain around Las Rosas has large variations in elevation — a maximum elevation change of 775 m around an average of 1,397 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,897 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,499 m.

The land around Las Rosas is covered by trees (33%) and grassland (32%) within 3 km, trees (45%) and grassland (30%) within 16 km, and trees (60%) and grassland (26%) within 80 km.

3 km
775 m
16 km
1,897 m
80 km
2,499 m
treesshrubsgrasslandcroplandartificial surfaceswater
Nearby: Venustiano Carranza 21 km · Teopisca 22 km · Comitán 29 km · Las Margaritas 42 km · San Cristóbal de las Casas 50 km · Ocosingo 67 km · Chiapas 78 km · Comalapa 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
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 Las Rosas (16.3655°, -92.3706°, elevation 1,312 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).