Climate and average weather in Purísima de Bustos

In Purísima de Bustos, the summers are hot, fairly dry, and mostly clear and the winters are warm and mostly clear.

Best: mid October to late March

Over the course of the year, the temperature in Purísima de Bustos typically varies from 8°C to 31°C, and is rarely below 5°C or above 34°C. May is the hottest month of the year, while January is the coldest.

Based on the travel score, the best time of year to visit Purísima de Bustos for warm-weather activities is from mid October to late March.

Hottest
May
31°
Coldest
Jan
Wettest
Jul
149 mm
Driest
Dec
7 mm
Rain / yr
658 mm
93 wet days
Daylight
10.7–13.3 h
shortest–longest
Elevation
1,779 m
21.0°N
Clearest
Mar
33% cloud

Purísima de Bustos is municipal seat of Purísima, State of Guanajuato, Mexico.

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

Purísima de Bustos 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 October to late March.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

The hot season lasts 2.5 months, from April 1 to June 14, with daily high temperatures above 29°C. The hottest month of the year in Purísima de Bustos is May, with an average high of 31°C and low of 16°C.

The cool season lasts 2.2 months, from December 4 to February 7, with daily high temperatures below 24°C. The coldest month of the year in Purísima de Bustos is January, with an average low of 8°C and high of 23°C.

Days typically run about 14°C warmer than nights, with the widest day–night swing (around 16°C) in March.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan238
Feb259
Mar2711
Apr3014
May3116
Jun2816
Jul2615
Aug2615
Sep2615
Oct2613
Nov2510
Dec238

Average hourly temperature in Purísima de Bustos

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 May afternoons, near 31°C, and coldest before dawn in January, near C.

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

Purísima de Bustos 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
Jan23° / 172.610.98.3
Feb25° / 132.311.38.5
Mar27° / 11°111.811.98.0
Apr30° / 14°81.812.56.4
May31° / 16°336.1135.4
Jun28° / 16°12314.413.35.1
Jul26° / 15°14919.313.15.3
Aug26° / 15°12517.712.75.5
Sep26° / 15°11315.312.15.8
Oct26° / 13°447.211.57.3
Nov25° / 10°143118.5
Dec23° / 71.510.78.5

Chance of rain

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

Purísima de Bustos gets about 658 mm of precipitation a year. On a typical day the chance of rain is some rain, but that rises and falls sharply with the seasons.

The wetter season lasts 4.6 months, from around May 29 to Oct 14, peaking in July at about 66% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Feb 25.

July is the wettest month by volume, with 149 mm over about 19 wet days; December is the driest, with 7 mm.

0%10%20%30%40%50%60%70%80%JanFebMarAprMayJunJulAugSepOctNovDecdrierwetterdriermostly drysome rainoften wetvery wetJul 3 · 66%Feb 25 · 4%
Rain on a day (%)Rain days
Jan93
Feb82
Mar62
Apr72
May196
Jun4914
Jul6119
Aug5818
Sep5015
Oct247
Nov103
Dec52

Monthly rainfall

Over a full year, Purísima de Bustos collects about 658 mm of rain across 93 wet days — roughly 55 mm in an average month.

It doesn’t fall evenly. July is the wettest month with 149 mm, while December is the driest at just 7 mm. The three wettest months alone bring about 61% of the year’s total.

0255075100125150175JanFebMarAprMayJunJulAugSepOctNovDec17131183312314912511344147
Rainfall (mm)Rain days
Jan173
Feb132
Mar112
Apr82
May336
Jun12314
Jul14919
Aug12518
Sep11315
Oct447
Nov143
Dec72

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Purísima de Bustos, 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 October 21 and lasts for 7.6 months, ending around June 9. The clearest month is March, when the sky is clear, mostly clear, or partly cloudy 76% of the time on average.

The cloudier part of the year begins around June 10 and lasts for 4.4 months, ending around October 20. The cloudiest month is September, when it is overcast or mostly cloudy 58% 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%JanFebMarAprMayJunJulAugSepOctNovDecNov 25 · 78%Sep 10 · 40%clearmostly clearpartly cloudymostly cloudyovercastclearercloudierclearer
Clearer (%)Cloudier (%)
Jan6832
Feb7426
Mar7624
Apr7030
May7426
Jun5644
Jul4951
Aug5149
Sep4258
Oct6040
Nov7624
Dec6832

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 11, brings about 13 h 18 min of light; the shortest, around January 1, only 10 h 42 min — a swing of roughly 2 h 36 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan10.97:316:22
Feb11.37:246:41
Mar11.97:026:53
Apr12.56:337:02
May13.06:147:14
Jun13.36:107:26
Jul13.16:187:28
Aug12.76:307:13
Sep12.16:386:45
Oct11.56:476:18
Nov11.07:036:02
Dec10.77:226:06

Sunny days

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

Purísima de Bustos averages about 14 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 6 and 20 days.

The sunnier stretch runs 7.5 months, from around Oct 22 to Jun 5. The sunniest month is February, with roughly 19 sunny days (bright).

The greyest month is September, down near 6 sunny days — about 67% fewer than the February peak.

0510152025JanFebMarAprMayJunJulAugSepOctNovDecsunniergreyersunniergloomymixedbrightbrilliantFeb 2420 daysSep 56 days
Sunny daysSky
Jan17Bright
Feb18Bright
Mar20Bright
Apr17Bright
May17Bright
Jun10Mixed
Jul7Gloomy
Aug8Mixed
Sep6Gloomy
Oct13Mixed
Nov19Bright
Dec17Bright

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 Purísima de Bustos, the air stays dry or comfortable essentially all year. Even in June, the muggiest month, it feels humid or worse only about 14% of the time — humidity is not something you need to plan around here.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecApr 26 · 100%Jun 22 · 82%humidcomfortabledrycomfortablehumidcomfortable
Dry (%)Comfortable (%)Humid (%)
Jan10000
Feb10000
Mar10000
Apr10000
May9181
Jun483814
Jul286210
Aug295912
Sep355115
Oct72253
Nov9640
Dec10000

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

The windier part of the year lasts 4.1 months, from around Jan 27 to Jun 1. The windiest month is April, averaging about 10 km/h (calm).

The calmer part of the year runs from around Jun 2 to Sep 27, with July the calmest month at about 7 km/h.

051015JanFebMarAprMayJunJulAugSepOctNovDeccalmerwindiercalmercalmlight breezeApr 5 · 10 km/hJul 21 · 7 km/h
Wind speed (km/h)Feels
Jan8calm
Feb9calm
Mar10calm
Apr10calm
May9calm
Jun8calm
Jul7calm
Aug7calm
Sep8calm
Oct8calm
Nov8calm
Dec8calm

Hazard calendar for Purísima de Bustos

In seasonPeak

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

Purísima de Bustos's rainy season runs June–September, 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 Purísima de Bustos

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around late March, Purísima de Bustos 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 Purísima de Bustos for general outdoor tourist activities is from mid October to late March, with a peak score in the last week of November.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timetravel scoretemperaturecloudsprecipitationNov 30 · 8.9

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
Jan8.3ideal
Feb8.5ideal
Mar8.0ideal
Apr6.4good
May5.4fair
Jun5.1fair
Jul5.3fair
Aug5.5fair
Sep5.9good
Oct7.3good
Nov8.5ideal
Dec8.5ideal

The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best times of year to visit Purísima de Bustos for hot-weather activities run from early February to early June and again from mid October to mid December, with a peak score in the first week of April.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebeach/pool scoretemperaturecloudsprecipitationApr 2 · 8.6

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 Purísima de Bustos, 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 May (highs near 31°C), the essentials are light clothes and sun protection. In the cold season around January (highs near 23°C), pack light clothes, a warm layer and sun protection.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In May, Purísima de Bustos sees daytime highs around 31°C and nights near 16°C. Pack light clothes and sun protection. About 6 days see rain.

UV index (midday) in Purísima de Bustos 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 Purísima de Bustos peaks around April 23 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 23UV 14Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb10Extreme
Mar13Extreme
Apr14Extreme
May14Extreme
Jun14Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct10Extreme
Nov8Very high
Dec7High

Average hourly UV index in Purísima de Bustos

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)
Jan6.53.5
Feb75
Mar86
Apr8.56.5
May8.57
Jun97
Jul8.56.5
Aug8.56.5
Sep86
Oct7.55
Nov6.53.5
Dec63

Air quality in Purísima de Bustos 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 Purísima de Bustos is worst in May — around 21 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 1420 µg/m³Oct 1814 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb17Moderate
Mar16Moderate
Apr17Moderate
May21Moderate
Jun15Moderate
Jul16Moderate
Aug15Moderate
Sep17Moderate
Oct14Moderate
Nov16Moderate
Dec20Moderate
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Purísima de Bustos 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. Purísima de Bustos banks about 3,430 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around May.

01,0002,0003,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan160
Feb199
Mar288
Apr348
May404
Jun371
Jul333
Aug331
Sep305
Oct291
Nov223
Dec175

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.

Purísima de Bustos receives about 6.1 kWh/m² a day of solar energy on average — intense — with a clear seasonal swing between 4.8 and 7.7 kWh/m².

The brighter stretch of the year lasts 6.0 months, from around Feb 18 to Aug 19. The brightest month is April, averaging about 7.6 kWh/m² (intense).

The dimmest month is December, down near 4.8 kWh/m² — roughly 36% less than the April peak.

0123456789JanFebMarAprMayJunJulAugSepOctNovDecdimmerbrighterdimmerdimmoderatebrightintenseApr 257.7 kWhDec 204.8 kWh
Solar energy (kWh/m²)Level
Jan5.0Bright
Feb6.0Bright
Mar7.0Intense
Apr7.6Intense
May7.5Intense
Jun6.6Intense
Jul6.3Intense
Aug6.2Intense
Sep5.6Bright
Oct5.5Bright
Nov5.1Bright
Dec4.8Bright

Where is Purísima de Bustos?

Purísima de Bustos sits at 21.0°N, 101.9°W, 1,779 m above sea level, in Mexico. The nearest listed city is San Francisco del Rincón, 2.0 km away.

Topography around Purísima de Bustos

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

Within 3 km, the terrain around Purísima de Bustos has significant variations in elevation — a maximum elevation change of 414 m around an average of 1,796 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 471 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,399 m.

The land around Purísima de Bustos is covered by artificial surfaces (42%) and shrubs (21%) within 3 km, shrubs (35%) and cropland (35%) within 16 km, and shrubs (34%) and cropland (33%) within 80 km.

3 km
414 m
16 km
471 m
80 km
1,399 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
Nearby: San Francisco del Rincón 2.0 km · Centro Familiar la Soledad 18 km · La Ermita 20 km · León de los Aldama 23 km · Medina 30 km · Lagos de Moreno 37 km · Romita 41 km · Silao de la Victoria 48 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 Purísima de Bustos (21.0297°, -101.8778°, elevation 1,779 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).