Climate and average weather in Melchor de Mencos

In Melchor de Mencos, the summers are humid, sweltering, fairly dry, and mostly clear and the winters are hot and partly cloudy.

Best: mid November to late February

Over the course of the year, the temperature in Melchor de Mencos typically varies from 19°C to 35°C, and is rarely below 15°C or above 39°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 Melchor de Mencos for warm-weather activities is from mid November to late February.

Hottest
Apr
35°
Coldest
Dec
19°
Wettest
Sep
149 mm
Driest
Feb
19 mm
Rain / yr
869 mm
150 wet days
Daylight
11.0–13.0 h
shortest–longest
Elevation
0 m
17.1°N
Clearest
Mar
41% cloud

Melchor de Mencos 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 mid November to late February.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

Temperatures in Melchor de Mencos stay fairly even through the year, without a distinct hot or cool season. The warmest month is April, with an average high of 35°C and low of 22°C; the coolest is December, with an average low of 19°C and high of 29°C.

Days typically run about 10°C warmer than nights, with the widest day–night swing (around 13°C) in April.

10°15°20°25°30°35°40°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2919
Feb3119
Mar3320
Apr3522
May3523
Jun3324
Jul3323
Aug3423
Sep3323
Oct3122
Nov2920
Dec2919

How hot and cold Melchor de Mencos really feels

Feels-like highFeels-like lowactual air temp

The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.

On the hottest afternoons, once humidity is folded in, Melchor de Mencos feels like about 39°C (around May 3). About 260 days a year carry some heat stress, and 15 of them tip into dangerous heat (feels-like above 39°C), peaking in May.

15°20°25°30°35°40°JanFebMarAprMayJunJulAugSepOctNovDecdangerous heat
Feels-like high (°C)Air high (°C)Feels-like low (°C)Air low (°C)
Jan30291919
Feb32311919
Mar35332020
Apr38352222
May39352323
Jun38332424
Jul38332323
Aug38342323
Sep38332323
Oct34312222
Nov31292020
Dec30291919

Average hourly temperature in Melchor de Mencos

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 35°C, and coldest before dawn in December, near 19°C.

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

Melchor de Mencos 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
Jan29° / 19°318.311.16.0
Feb31° / 19°194.911.45.2
Mar33° / 20°285.311.94.0
Apr35° / 22°314.912.42.8
May35° / 23°7811.112.82.4
Jun33° / 24°12419132.6
Jul33° / 23°6714.412.92.9
Aug34° / 23°9616.812.62.5
Sep33° / 23°14922.612.12.4
Oct31° / 22°13219.811.63.5
Nov29° / 20°7413.211.25.0
Dec29° / 19°429.7115.8

Chance of rain

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

Melchor de Mencos gets about 869 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 6.1 months, from around May 20 to Nov 21, peaking in September at about 78% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Feb 25.

September is the wettest month by volume, with 149 mm over about 23 wet days; February is the driest, with 19 mm.

0%10%20%30%40%50%60%70%80%90%JanFebMarAprMayJunJulAugSepOctNovDecdrierwetterdriermostly drysome rainoften wetvery wetSep 25 · 78%Feb 25 · 14%
Rain on a day (%)Rain days
Jan268
Feb185
Mar165
Apr165
May3711
Jun6119
Jul4714
Aug5417
Sep7423
Oct6520
Nov4413
Dec3210

Monthly rainfall

Over a full year, Melchor de Mencos collects about 869 mm of rain across 150 wet days — roughly 72 mm in an average month.

It doesn’t fall evenly. September is the wettest month with 149 mm, while February is the driest at just 19 mm. The three wettest months alone bring about 47% of the year’s total.

0255075100125150175JanFebMarAprMayJunJulAugSepOctNovDec311928317812467961491327442
Rainfall (mm)Rain days
Jan318
Feb195
Mar285
Apr315
May7811
Jun12419
Jul6714
Aug9617
Sep14923
Oct13220
Nov7413
Dec4210

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Melchor de Mencos, 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 24 and lasts for 5.7 months, ending around May 17. The clearest month is March, when the sky is clear, mostly clear, or partly cloudy 78% of the time on average.

The cloudier part of the year begins around May 18 and lasts for 6.2 months, ending around November 23. The cloudiest month is September, when it is overcast or mostly cloudy 73% 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 23 · 81%Sep 23 · 25%clearmostly clearpartly cloudymostly cloudyovercastclearercloudierclearer
Clearer (%)Cloudier (%)
Jan6337
Feb7624
Mar7822
Apr7525
May5248
Jun3268
Jul4258
Aug4258
Sep2773
Oct3367
Nov5149
Dec5941

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 3, 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)
Jan11.16:335:38
Feb11.46:285:54
Mar11.96:106:03
Apr12.45:456:08
May12.85:296:17
Jun13.05:266:27
Jul12.95:346:30
Aug12.65:436:18
Sep12.15:485:54
Oct11.65:535:30
Nov11.26:065:17
Dec11.06:235:22

Sunny days

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

Melchor de Mencos averages about 9 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 3 and 18 days.

The sunnier stretch runs 5.4 months, from around Dec 2 to May 15. The sunniest month is February, with roughly 16 sunny days (bright).

The greyest month is September, down near 4 sunny days — about 78% fewer than the February peak.

05101520JanFebMarAprMayJunJulAugSepOctNovDecsunniergreyersunniergloomymixedbrightFeb 2518 daysSep 233 days
Sunny daysSky
Jan11Mixed
Feb15Bright
Mar17Bright
Apr15Bright
May9Mixed
Jun5Gloomy
Jul7Gloomy
Aug7Gloomy
Sep3Gloomy
Oct5Gloomy
Nov8Mixed
Dec10Mixed

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.

Melchor de Mencos is humid all year round — on a typical day the air feels at least humid, and there is no real dry season to wait for.

The stickiest month is May, when it feels muggy, oppressive or miserable about 97% of the time. Even in January, the mildest month, the air is dry or comfortable only 13% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJan 16 · 14%May 8 · 0%miserablemuggyoppressivehumidcomfortablecomfortablehumidcomfortable
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
Jan310255390
Feb37216450
Mar262260100
Apr011354310
May00332614
Jun0008839
Jul00014842
Aug00011863
Sep0004897
Oct00316746
Nov031538430
Dec271849240

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 Melchor de Mencos is typically calm, near 8 km/h, and varies little with the seasons.

The windier part of the year lasts 2.3 months, from around Jun 8 to Aug 15. The windiest month is July, averaging about 9 km/h (calm).

The calmer part of the year runs from around Aug 16 to Feb 1, with September the calmest month at about 6 km/h.

051015JanFebMarAprMayJunJulAugSepOctNovDeccalmerwindiercalmercalmlight breezeJul 4 · 9 km/hSep 21 · 6 km/h
Wind speed (km/h)Feels
Jan8calm
Feb8calm
Mar9calm
Apr9calm
May8calm
Jun8calm
Jul9calm
Aug8calm
Sep6calm
Oct6calm
Nov7calm
Dec7calm

Hazard calendar for Melchor de Mencos

In seasonPeak

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

Melchor de Mencos's rainy season runs August–November, when most of the year's rain falls.

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

Best time to visit Melchor de Mencos

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around late November, Melchor de Mencos is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.

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 Melchor de Mencos for general outdoor tourist activities is from mid November to late February, with a peak score in the second week of January.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timetravel scoretemperaturecloudsprecipitationJan 11 · 6.1

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
Jan6.0good
Feb5.2fair
Mar4.0fair
Apr2.8poor
May2.4poor
Jun2.6poor
Jul2.9poor
Aug2.5poor
Sep2.4poor
Oct3.5fair
Nov5.0fair
Dec5.8good

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 Melchor de Mencos for hot-weather activities is from early November to mid April, with a peak score in the third week of February.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebeach/pool scoretemperaturecloudsprecipitationFeb 19 · 7.6

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 Melchor de Mencos, 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.

For a warm-season trip around April (highs near 35°C), the essentials are light clothes and sun protection. In the cold season around December (highs near 29°C), pack light clothes and rain gear.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In April, Melchor de Mencos sees daytime highs around 35°C and nights near 22°C. Pack light clothes and sun protection. About 5 days see rain.

UV index (midday) in Melchor de Mencos 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 Melchor de Mencos peaks around April 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 10UV 13Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar13Extreme
Apr13Extreme
May10Extreme
Jun13Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct11Extreme
Nov8Very high
Dec8Very high

Average hourly UV index in Melchor de Mencos

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 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)
Jan6.54
Feb7.55.5
Mar86
Apr86.5
May85.5
Jun8.56.5
Jul8.56
Aug8.56.5
Sep86
Oct7.55
Nov6.54
Dec63.5

Air quality in Melchor de Mencos 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 Melchor de Mencos is worst in May — around 30 µg/m³ PM2.5 (moderate), about 5.2× the cleanest month (December, 6 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1529 µg/m³Dec 186 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb7Good
Mar10Good
Apr28Moderate
May30Moderate
Jun26Moderate
Jul28Moderate
Aug19Moderate
Sep14Moderate
Oct10Good
Nov7Good
Dec6Good
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Melchor de Mencos 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. Melchor de Mencos banks about 6,130 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around May.

02,0004,0006,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan422
Feb421
Mar516
Apr556
May593
Jun556
Jul571
Aug579
Sep542
Oct508
Nov438
Dec428

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.

Melchor de Mencos receives about 4.9 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 3.6 and 6.1 kWh/m².

The brighter stretch of the year lasts 6.8 months, from around Feb 23 to Sep 16. The brightest month is April, averaging about 6.1 kWh/m² (intense).

The dimmest month is December, down near 3.6 kWh/m² — roughly 40% less than the April peak.

01234567JanFebMarAprMayJunJulAugSepOctNovDecdimmerbrighterdimmerdimmoderatebrightintenseApr 266.1 kWhDec 173.6 kWh
Solar energy (kWh/m²)Level
Jan3.8Moderate
Feb4.6Bright
Mar5.5Bright
Apr6.1Intense
May5.8Bright
Jun5.3Bright
Jul5.7Bright
Aug5.6Bright
Sep4.9Bright
Oct4.2Bright
Nov3.8Moderate
Dec3.6Moderate

Where is Melchor de Mencos?

Melchor de Mencos sits at 17.1°N, 89.2°W, 0 m above sea level, in Guatemala. The nearest listed city is San Ignacio, 14 km away.

BelmopanFloresSan BenitoPoptúnHopkinsDangrigaCrooked Tree

Topography around Melchor de Mencos

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

Within 3 km, the terrain around Melchor de Mencos has only modest variations in elevation — a maximum elevation change of 173 m around an average of 141 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 502 m; within 80 km, large variations in elevation — a maximum elevation change of 1,117 m.

The land around Melchor de Mencos is covered by trees (60%) and grassland (28%) within 3 km, trees (67%) and grassland (31%) within 16 km, and trees (78%) within 80 km.

3 km
173 m
16 km
502 m
80 km
1,117 m
treesgrasslandcroplandartificial surfaceswater
Nearby: San Ignacio 14 km · Belmopan 46 km · Flores 81 km · San Benito 83 km · Poptún 86 km · Hopkins 95 km · Dangriga 98 km · Crooked Tree 102 km

Guatemala travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 43% of US
price level, 2025
GDP per capita
$6,598
2025
Happiness
6.5 / 10
World Happiness, 2025
Safe drinking water
49%
of population, 2024
Homicide rate
23.4
per 100k, 2023
Road deaths
22.9
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 510
Religion
Evangelical 46%Roman Catholic 42%none 11%

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 Melchor de Mencos (17.0661°, -89.1523°, elevation 0 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).