Climate and average weather in Zacatlán
In Zacatlán, the weather is warm, wet, and partly cloudy and remarkably steady, with daytime highs holding near warm levels all year. The wettest stretch peaks around September.
Over the course of the year, the temperature in Zacatlán typically varies from 7°C to 23°C, and is rarely below 3°C or above 26°C. May is the hottest month of the year, while January is the coldest.
Based on the travel score, the best times of year to visit Zacatlán for warm-weather activities are from early January to early June and late October to late December.
- Hottest
- May
- 23°
- Coldest
- Jan
- 7°
- Wettest
- Sep
- 319 mm
- Driest
- Dec
- 60 mm
- Rain / yr
- 2067 mm
- 239 wet days
- Daylight
- 10.8–13.2 h
- shortest–longest
- Elevation
- 2,048 m
- 19.9°N
- Clearest
- Feb
- 56% cloud
Zacatlán is municipal seat of Zacatlán, State of Puebla, Mexico.
- Founded
- 1562
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Zacatlán 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 January to early June.
Temperature through the year
Daily average highs and lows in Zacatlán, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
Temperatures in Zacatlán stay fairly even through the year, without a distinct hot or cool season. The warmest month is May, with an average high of 23°C and low of 12°C; the coolest is January, with an average low of 7°C and high of 17°C.
Days typically run about 10°C warmer than nights, with the widest day–night swing (around 11°C) in March.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 17 | 19 | 20 | 22 | 23 | 22 | 21 | 21 | 21 | 20 | 18 | 17 |
| Avg low (°C) | 7 | 8 | 9 | 11 | 12 | 13 | 13 | 13 | 13 | 11 | 9 | 7 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 17 | 7 |
| Feb | 19 | 8 |
| Mar | 20 | 9 |
| Apr | 22 | 11 |
| May | 23 | 12 |
| Jun | 22 | 13 |
| Jul | 21 | 13 |
| Aug | 21 | 13 |
| Sep | 21 | 13 |
| Oct | 20 | 11 |
| Nov | 18 | 9 |
| Dec | 17 | 7 |
Average hourly temperature in Zacatlán
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 23°C, and coldest before dawn in January, near 7°C.
Zacatlán weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 17° / 7° | 64 | 12.5 | 10.9 | 5.1 |
| Feb | 19° / 8° | 64 | 12 | 11.3 | 5.6 |
| Mar | 20° / 9° | 97 | 16.5 | 11.9 | 5.5 |
| Apr | 22° / 11° | 135 | 19.4 | 12.4 | 5.2 |
| May | 23° / 12° | 139 | 20.8 | 12.9 | 5.2 |
| Jun | 22° / 13° | 279 | 24.2 | 13.2 | 4.3 |
| Jul | 21° / 13° | 269 | 29.5 | 13.1 | 3.6 |
| Aug | 21° / 13° | 275 | 28.9 | 12.7 | 3.6 |
| Sep | 21° / 13° | 319 | 26.7 | 12.1 | 3.8 |
| Oct | 20° / 11° | 248 | 20.7 | 11.5 | 4.6 |
| Nov | 18° / 9° | 118 | 15.3 | 11.1 | 5.1 |
| Dec | 17° / 7° | 60 | 12.4 | 10.8 | 5.3 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Zacatlán gets about 2067 mm of precipitation a year. On a typical day the chance of rain is very wet, but that rises and falls sharply with the seasons.
The wetter season lasts 4.6 months, from around May 30 to Oct 17, peaking in July at about 95% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Dec 8.
September is the wettest month by volume, with 319 mm over about 27 wet days; December is the driest, with 60 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 41 | 43 | 53 | 65 | 67 | 81 | 95 | 93 | 88 | 67 | 51 | 40 |
| Rain days | 13 | 12 | 17 | 19 | 21 | 24 | 30 | 29 | 27 | 21 | 15 | 12 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 41 | 13 |
| Feb | 43 | 12 |
| Mar | 53 | 17 |
| Apr | 65 | 19 |
| May | 67 | 21 |
| Jun | 81 | 24 |
| Jul | 95 | 30 |
| Aug | 93 | 29 |
| Sep | 88 | 27 |
| Oct | 67 | 21 |
| Nov | 51 | 15 |
| Dec | 40 | 12 |
Monthly rainfall
Over a full year, Zacatlán collects about 2067 mm of rain across 239 wet days — roughly 172 mm in an average month.
It doesn’t fall evenly. September is the wettest month with 319 mm, while December is the driest at just 60 mm. The three wettest months alone bring about 42% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 64 | 64 | 97 | 135 | 139 | 279 | 269 | 275 | 319 | 248 | 118 | 60 |
| Rain days | 13 | 12 | 17 | 19 | 21 | 24 | 30 | 29 | 27 | 21 | 15 | 12 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 64 | 13 |
| Feb | 64 | 12 |
| Mar | 97 | 17 |
| Apr | 135 | 19 |
| May | 139 | 21 |
| Jun | 279 | 24 |
| Jul | 269 | 30 |
| Aug | 275 | 29 |
| Sep | 319 | 27 |
| Oct | 248 | 21 |
| Nov | 118 | 15 |
| Dec | 60 | 12 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Zacatlán, 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 14 and lasts for 6.8 months, ending around June 8. The clearest month is February, when the sky is clear, mostly clear, or partly cloudy 52% of the time on average.
The cloudier part of the year begins around June 9 and lasts for 5.2 months, ending around November 13. The cloudiest month is September, when it is overcast or mostly cloudy 85% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 47 | 52 | 52 | 51 | 48 | 27 | 17 | 19 | 15 | 26 | 39 | 48 |
| Cloudier (%) | 53 | 48 | 48 | 49 | 52 | 73 | 83 | 81 | 85 | 74 | 61 | 52 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 47 | 53 |
| Feb | 52 | 48 |
| Mar | 52 | 48 |
| Apr | 51 | 49 |
| May | 48 | 52 |
| Jun | 27 | 73 |
| Jul | 17 | 83 |
| Aug | 19 | 81 |
| Sep | 15 | 85 |
| Oct | 26 | 74 |
| Nov | 39 | 61 |
| Dec | 48 | 52 |
Daylight, sunrise and sunset
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 6, brings about 13 h 12 min of light; the shortest, around January 1, only 10 h 48 min — a swing of roughly 2 h 24 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 10.9 | 11.3 | 11.9 | 12.4 | 12.9 | 13.2 | 13.1 | 12.7 | 12.1 | 11.5 | 11.1 | 10.8 |
| Sunrise (AM) | 7:14 | 7:07 | 6:46 | 6:18 | 6:00 | 5:56 | 6:05 | 6:15 | 6:23 | 6:31 | 6:46 | 7:04 |
| Sunset (PM) | 6:09 | 6:26 | 6:37 | 6:46 | 6:56 | 7:08 | 7:10 | 6:56 | 6:30 | 6:03 | 5:48 | 5:52 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 10.9 | 7:14 | 6:09 |
| Feb | 11.3 | 7:07 | 6:26 |
| Mar | 11.9 | 6:46 | 6:37 |
| Apr | 12.4 | 6:18 | 6:46 |
| May | 12.9 | 6:00 | 6:56 |
| Jun | 13.2 | 5:56 | 7:08 |
| Jul | 13.1 | 6:05 | 7:10 |
| Aug | 12.7 | 6:15 | 6:56 |
| Sep | 12.1 | 6:23 | 6:30 |
| Oct | 11.5 | 6:31 | 6:03 |
| Nov | 11.1 | 6:46 | 5:48 |
| Dec | 10.8 | 7:04 | 5:52 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Zacatlán averages about 6 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 1 and 11 days.
The sunnier stretch runs 6.7 months, from around Nov 13 to Jun 5. The sunniest month is February, with roughly 10 sunny days (mixed).
The greyest month is July, down near 1 sunny days — about 90% fewer than the February peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 9 | 10 | 10 | 8 | 7 | 4 | 1 | 1 | 1 | 4 | 6 | 9 |
| Sky | Mixed | Mixed | Mixed | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Mixed |
| Sunny days | Sky | |
|---|---|---|
| Jan | 9 | Mixed |
| Feb | 10 | Mixed |
| Mar | 10 | Mixed |
| Apr | 8 | Gloomy |
| May | 7 | Gloomy |
| Jun | 4 | Gloomy |
| Jul | 1 | Gloomy |
| Aug | 1 | Gloomy |
| Sep | 1 | Gloomy |
| Oct | 4 | Gloomy |
| Nov | 6 | Gloomy |
| Dec | 9 | Mixed |
Humidity comfort
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 Zacatlán, how humid it feels changes noticeably over the year.
The more humid part of the year lasts 2.4 months, from around May 3 to July 14. The muggiest month is June, when the air feels humid, muggy or worse about 15% of the time.
The most comfortable stretch runs from around October 10 to May 2, and March is the most comfortable month — the air is dry or comfortable 100% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 98 | 88 | 60 | 29 | 11 | 6 | 7 | 13 | 46 | 83 | 98 |
| Comfortable (%) | 0 | 2 | 12 | 38 | 63 | 73 | 89 | 87 | 78 | 51 | 17 | 2 |
| Humid (%) | 0 | 0 | 0 | 2 | 8 | 15 | 5 | 6 | 9 | 3 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| Jan | 100 | 0 | 0 |
| Feb | 98 | 2 | 0 |
| Mar | 88 | 12 | 0 |
| Apr | 60 | 38 | 2 |
| May | 29 | 63 | 8 |
| Jun | 11 | 73 | 15 |
| Jul | 6 | 89 | 5 |
| Aug | 7 | 87 | 6 |
| Sep | 13 | 78 | 9 |
| Oct | 46 | 51 | 3 |
| Nov | 83 | 17 | 0 |
| Dec | 98 | 2 | 0 |
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.
Wind in Zacatlán is steady company: average speeds sit near 5 km/h — calm — in every month of the year, with no meaningful windy or calm season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 5 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 5 | calm |
| Feb | 6 | calm |
| Mar | 6 | calm |
| Apr | 6 | calm |
| May | 6 | calm |
| Jun | 5 | calm |
| Jul | 5 | calm |
| Aug | 5 | calm |
| Sep | 5 | calm |
| Oct | 5 | calm |
| Nov | 5 | calm |
| Dec | 5 | calm |
Hazard calendar for Zacatlán
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Zacatlán's rainy season runs June–October, when most of the year's rain falls.
Best time to visit Zacatlán
To characterize how pleasant the weather is in Zacatlán throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around late May, Zacatlán 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 Zacatlán for general outdoor tourist activities is from late October to early June, with a peak score in the last week of February.
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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 5.1 | 5.6 | 5.5 | 5.2 | 5.2 | 4.3 | 3.6 | 3.6 | 3.8 | 4.6 | 5.2 | 5.3 |
| Rating | fair | good | good | fair | fair | fair | fair | fair | fair | fair | fair | fair |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 5.1 | fair |
| Feb | 5.6 | good |
| Mar | 5.5 | good |
| Apr | 5.2 | fair |
| May | 5.2 | fair |
| Jun | 4.3 | fair |
| Jul | 3.6 | fair |
| Aug | 3.6 | fair |
| Sep | 3.8 | fair |
| Oct | 4.6 | fair |
| Nov | 5.2 | fair |
| Dec | 5.3 | fair |
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 Zacatlán for hot-weather activities is from late March to mid June, with a peak score in the last week of May.
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 Zacatlán, by month
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.
Zacatlán packs about the same all year — highs hold near 23°C. Across the year the things worth having are light clothes, rain gear, sun protection and a warm layer.
In May, Zacatlán sees daytime highs around 23°C and nights near 12°C. Pack rain gear and sun protection. Worth having: light clothes. About 21 days see rain.
UV index (midday) in Zacatlán by month
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 Zacatlán peaks around April 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 8 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 8 | 11 | 13 | 14 | 10 | 14 | 12 | 14 | 11 | 10 | 8 | 8 |
| Level | Very high | Extreme | Extreme | Extreme | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 11 | Extreme |
| Mar | 13 | Extreme |
| Apr | 14 | Extreme |
| May | 10 | Very high |
| Jun | 14 | Extreme |
| Jul | 12 | Extreme |
| Aug | 14 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Extreme |
| Nov | 8 | Very high |
| Dec | 8 | Very high |
Average hourly UV index in Zacatlán
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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 6.5 | 7 | 8 | 8.5 | 8 | 9 | 8.5 | 8.5 | 8 | 7.5 | 6.5 | 6 |
| UV ≥ 6 (h/day) | 4 | 5 | 6 | 6.5 | 5.5 | 7 | 6.5 | 6.5 | 5.5 | 5 | 4 | 3.5 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 6.5 | 4 |
| Feb | 7 | 5 |
| Mar | 8 | 6 |
| Apr | 8.5 | 6.5 |
| May | 8 | 5.5 |
| Jun | 9 | 7 |
| Jul | 8.5 | 6.5 |
| Aug | 8.5 | 6.5 |
| Sep | 8 | 5.5 |
| Oct | 7.5 | 5 |
| Nov | 6.5 | 4 |
| Dec | 6 | 3.5 |
Air quality in Zacatlán by month
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 Zacatlán is worst in December — around 95 µg/m³ PM2.5 (unhealthy), about 2.0× the cleanest month (September, 49 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 88 | 89 | 85 | 90 | 85 | 59 | 56 | 52 | 49 | 52 | 70 | 95 |
| Level | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Poor | Poor | Poor | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 88 | Unhealthy |
| Feb | 89 | Unhealthy |
| Mar | 85 | Unhealthy |
| Apr | 90 | Unhealthy |
| May | 85 | Unhealthy |
| Jun | 59 | Unhealthy |
| Jul | 56 | Unhealthy |
| Aug | 52 | Poor |
| Sep | 49 | Poor |
| Oct | 52 | Poor |
| Nov | 70 | Unhealthy |
| Dec | 95 | Unhealthy |
Growing season
Zacatlán is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Frost nights | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 100 | 0 |
| Feb | 100 | 0 |
| Mar | 100 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 100 | 0 |
| Dec | 100 | 0 |
Growing degree days
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. Zacatlán banks about 1,923 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around June.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 53 | 86 | 148 | 199 | 232 | 225 | 217 | 218 | 204 | 169 | 106 | 67 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 53 |
| Feb | 86 |
| Mar | 148 |
| Apr | 199 |
| May | 232 |
| Jun | 225 |
| Jul | 217 |
| Aug | 218 |
| Sep | 204 |
| Oct | 169 |
| Nov | 106 |
| Dec | 67 |
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.
Zacatlán receives about 5.1 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 3.9 and 6.3 kWh/m².
The brighter stretch of the year lasts 6.3 months, from around Feb 22 to Sep 2. The brightest month is May, averaging about 6.3 kWh/m² (intense).
The dimmest month is December, down near 3.9 kWh/m² — roughly 38% less than the May peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.0 | 4.8 | 5.6 | 6.2 | 6.3 | 5.7 | 5.5 | 5.5 | 4.7 | 4.5 | 4.0 | 4.0 |
| Level | Bright | Bright | Bright | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 4.0 | Bright |
| Feb | 4.8 | Bright |
| Mar | 5.6 | Bright |
| Apr | 6.2 | Intense |
| May | 6.3 | Intense |
| Jun | 5.7 | Bright |
| Jul | 5.5 | Bright |
| Aug | 5.5 | Bright |
| Sep | 4.7 | Bright |
| Oct | 4.5 | Bright |
| Nov | 4.0 | Bright |
| Dec | 4.0 | Moderate |
Where is Zacatlán?
Zacatlán sits at 19.9°N, 98.0°W, 2,048 m above sea level, in Mexico. The nearest listed city is Chignahuapan, 13 km away.
Topography around Zacatlán
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Zacatlán.
Within 3 km, the terrain around Zacatlán has large variations in elevation — a maximum elevation change of 769 m around an average of 2,049 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,999 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,363 m.
The land around Zacatlán is covered by trees (48%) and cropland (20%) within 3 km, trees (67%) within 16 km, and trees (50%) and cropland (23%) within 80 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
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 Zacatlán (19.9355°, -97.9613°, elevation 2,048 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).