Climate and average weather in Valle de Santiago
In Valle de Santiago, the summers are hot, fairly dry, and mostly clear and the winters are warm and mostly clear.
Over the course of the year, the temperature in Valle de Santiago typically varies from 8°C to 32°C, and is rarely below 5°C or above 35°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 Valle de Santiago for warm-weather activities are from early January to mid March and mid October to late December.
- Hottest
- May
- 32°
- Coldest
- Jan
- 8°
- Wettest
- Jul
- 170 mm
- Driest
- Dec
- 4 mm
- Rain / yr
- 706 mm
- 94 wet days
- Daylight
- 10.8–13.2 h
- shortest–longest
- Elevation
- 1,792 m
- 20.4°N
- Clearest
- Feb
- 32% cloud
Valle de Santiago is municipal seat of Valle de Santiago, State of Guanajuato, Mexico.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Valle de Santiago 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 December.
Temperature through the year
Daily average highs and lows in Valle de Santiago, 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 March 29 to June 13, with daily high temperatures above 30°C. The hottest month of the year in Valle de Santiago is May, with an average high of 32°C and low of 16°C.
The cool season lasts 2.3 months, from November 30 to February 8, with daily high temperatures below 26°C. The coldest month of the year in Valle de Santiago is January, with an average low of 8°C and high of 25°C.
Days typically run about 15°C warmer than nights, with the widest day–night swing (around 17°C) in March.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 25 | 27 | 29 | 31 | 32 | 30 | 28 | 28 | 27 | 27 | 26 | 25 |
| Avg low (°C) | 8 | 10 | 12 | 14 | 16 | 17 | 16 | 16 | 15 | 14 | 11 | 9 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 25 | 8 |
| Feb | 27 | 10 |
| Mar | 29 | 12 |
| Apr | 31 | 14 |
| May | 32 | 16 |
| Jun | 30 | 17 |
| Jul | 28 | 16 |
| Aug | 28 | 16 |
| Sep | 27 | 15 |
| Oct | 27 | 14 |
| Nov | 26 | 11 |
| Dec | 25 | 9 |
How hot and cold Valle de Santiago really feels
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, Valle de Santiago feels like about 32°C (around May 2). About 34 days a year carry some heat stress, peaking in May.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | 24 | 27 | 29 | 31 | 32 | 30 | 28 | 28 | 27 | 27 | 26 | 25 |
| Air high (°C) | 25 | 27 | 29 | 31 | 32 | 30 | 28 | 28 | 27 | 27 | 26 | 25 |
| Feels-like low (°C) | 7 | 9 | 12 | 14 | 16 | 17 | 16 | 16 | 15 | 14 | 11 | 8 |
| Air low (°C) | 8 | 10 | 12 | 14 | 16 | 17 | 16 | 16 | 15 | 14 | 11 | 9 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 24 | 25 | 7 | 8 |
| Feb | 27 | 27 | 9 | 10 |
| Mar | 29 | 29 | 12 | 12 |
| Apr | 31 | 31 | 14 | 14 |
| May | 32 | 32 | 16 | 16 |
| Jun | 30 | 30 | 17 | 17 |
| Jul | 28 | 28 | 16 | 16 |
| Aug | 28 | 28 | 16 | 16 |
| Sep | 27 | 27 | 15 | 15 |
| Oct | 27 | 27 | 14 | 14 |
| Nov | 26 | 26 | 11 | 11 |
| Dec | 25 | 25 | 8 | 9 |
Average hourly temperature in Valle de Santiago
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 32°C, and coldest before dawn in January, near 8°C.
Valle de Santiago 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 | 25° / 8° | 10 | 1.9 | 10.9 | 8.6 |
| Feb | 27° / 10° | 12 | 2.1 | 11.3 | 8.2 |
| Mar | 29° / 12° | 11 | 1.8 | 11.9 | 6.9 |
| Apr | 31° / 14° | 9 | 2.2 | 12.5 | 5.3 |
| May | 32° / 16° | 37 | 6.3 | 13 | 4.4 |
| Jun | 30° / 17° | 135 | 14.7 | 13.2 | 4.4 |
| Jul | 28° / 16° | 170 | 20.3 | 13.1 | 4.9 |
| Aug | 28° / 16° | 146 | 18 | 12.7 | 5.2 |
| Sep | 27° / 15° | 122 | 16 | 12.1 | 5.5 |
| Oct | 27° / 14° | 39 | 6.9 | 11.5 | 7.0 |
| Nov | 26° / 11° | 13 | 2.5 | 11 | 8.2 |
| Dec | 25° / 9° | 4 | 1.1 | 10.8 | 8.7 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Valle de Santiago gets about 706 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 4.5 months, from around May 28 to Oct 12, peaking in July at about 68% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Dec 5.
July is the wettest month by volume, with 170 mm over about 20 wet days; December is the driest, with 4 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 7 | 7 | 6 | 8 | 20 | 50 | 64 | 59 | 52 | 23 | 8 | 3 |
| Rain days | 2 | 2 | 2 | 2 | 6 | 15 | 20 | 18 | 16 | 7 | 3 | 1 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 7 | 2 |
| Feb | 7 | 2 |
| Mar | 6 | 2 |
| Apr | 8 | 2 |
| May | 20 | 6 |
| Jun | 50 | 15 |
| Jul | 64 | 20 |
| Aug | 59 | 18 |
| Sep | 52 | 16 |
| Oct | 23 | 7 |
| Nov | 8 | 3 |
| Dec | 3 | 1 |
Monthly rainfall
Over a full year, Valle de Santiago collects about 706 mm of rain across 94 wet days — roughly 59 mm in an average month.
It doesn’t fall evenly. July is the wettest month with 170 mm, while December is the driest at just 4 mm. The three wettest months alone bring about 64% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 10 | 12 | 11 | 9 | 37 | 135 | 170 | 146 | 122 | 39 | 13 | 4 |
| Rain days | 2 | 2 | 2 | 2 | 6 | 15 | 20 | 18 | 16 | 7 | 3 | 1 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 10 | 2 |
| Feb | 12 | 2 |
| Mar | 11 | 2 |
| Apr | 9 | 2 |
| May | 37 | 6 |
| Jun | 135 | 15 |
| Jul | 170 | 20 |
| Aug | 146 | 18 |
| Sep | 122 | 16 |
| Oct | 39 | 7 |
| Nov | 13 | 3 |
| Dec | 4 | 1 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Valle de Santiago, 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 24 and lasts for 7.5 months, ending around June 7. The clearest month is March, when the sky is clear, mostly clear, or partly cloudy 79% of the time on average.
The cloudier part of the year begins around June 8 and lasts for 4.5 months, ending around October 23. The cloudiest month is September, when it is overcast or mostly cloudy 62% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 69 | 76 | 79 | 73 | 73 | 52 | 43 | 44 | 38 | 55 | 75 | 70 |
| Cloudier (%) | 31 | 24 | 21 | 27 | 27 | 48 | 57 | 56 | 62 | 45 | 25 | 30 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 69 | 31 |
| Feb | 76 | 24 |
| Mar | 79 | 21 |
| Apr | 73 | 27 |
| May | 73 | 27 |
| Jun | 52 | 48 |
| Jul | 43 | 57 |
| Aug | 44 | 56 |
| Sep | 38 | 62 |
| Oct | 55 | 45 |
| Nov | 75 | 25 |
| Dec | 70 | 30 |
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 2, 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 | 12.5 | 13.0 | 13.2 | 13.1 | 12.7 | 12.1 | 11.5 | 11.0 | 10.8 |
| Sunrise (AM) | 7:27 | 7:20 | 6:59 | 6:31 | 6:12 | 6:08 | 6:17 | 6:28 | 6:36 | 6:44 | 7:00 | 7:18 |
| Sunset (PM) | 6:21 | 6:39 | 6:50 | 6:59 | 7:10 | 7:22 | 7:24 | 7:10 | 6:43 | 6:16 | 6:00 | 6:04 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 10.9 | 7:27 | 6:21 |
| Feb | 11.3 | 7:20 | 6:39 |
| Mar | 11.9 | 6:59 | 6:50 |
| Apr | 12.5 | 6:31 | 6:59 |
| May | 13.0 | 6:12 | 7:10 |
| Jun | 13.2 | 6:08 | 7:22 |
| Jul | 13.1 | 6:17 | 7:24 |
| Aug | 12.7 | 6:28 | 7:10 |
| Sep | 12.1 | 6:36 | 6:43 |
| Oct | 11.5 | 6:44 | 6:16 |
| Nov | 11.0 | 7:00 | 6:00 |
| Dec | 10.8 | 7:18 | 6:04 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Valle de Santiago averages about 13 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 4 and 21 days.
The sunnier stretch runs 7.3 months, from around Oct 25 to Jun 2. The sunniest month is February, with roughly 19 sunny days (bright).
The greyest month is September, down near 5 sunny days — about 74% fewer than the February peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 17 | 18 | 20 | 17 | 16 | 9 | 6 | 6 | 5 | 11 | 18 | 18 |
| Sky | Bright | Bright | Bright | Bright | Bright | Mixed | Gloomy | Gloomy | Gloomy | Mixed | Bright | Bright |
| Sunny days | Sky | |
|---|---|---|
| Jan | 17 | Bright |
| Feb | 18 | Bright |
| Mar | 20 | Bright |
| Apr | 17 | Bright |
| May | 16 | Bright |
| Jun | 9 | Mixed |
| Jul | 6 | Gloomy |
| Aug | 6 | Gloomy |
| Sep | 5 | Gloomy |
| Oct | 11 | Mixed |
| Nov | 18 | Bright |
| Dec | 18 | Bright |
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 Valle de Santiago, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 4.1 months, from around June 3 to October 6. The muggiest month is July, when the air feels humid, muggy or worse about 31% of the time.
The most comfortable stretch runs from around October 7 to June 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 | 100 | 100 | 99 | 86 | 40 | 17 | 16 | 24 | 62 | 93 | 100 |
| Comfortable (%) | 0 | 0 | 0 | 1 | 12 | 35 | 53 | 54 | 46 | 30 | 6 | 0 |
| Humid (%) | 0 | 0 | 0 | 0 | 2 | 25 | 31 | 30 | 31 | 8 | 1 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| Jan | 100 | 0 | 0 |
| Feb | 100 | 0 | 0 |
| Mar | 100 | 0 | 0 |
| Apr | 99 | 1 | 0 |
| May | 86 | 12 | 2 |
| Jun | 40 | 35 | 25 |
| Jul | 17 | 53 | 31 |
| Aug | 16 | 54 | 30 |
| Sep | 24 | 46 | 31 |
| Oct | 62 | 30 | 8 |
| Nov | 93 | 6 | 1 |
| Dec | 100 | 0 | 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 Valle de Santiago is steady company: average speeds sit near 7 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) | 7 | 7 | 8 | 8 | 7 | 7 | 6 | 6 | 7 | 8 | 7 | 6 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 7 | calm |
| Feb | 7 | calm |
| Mar | 8 | calm |
| Apr | 8 | calm |
| May | 7 | calm |
| Jun | 7 | calm |
| Jul | 6 | calm |
| Aug | 6 | calm |
| Sep | 7 | calm |
| Oct | 8 | calm |
| Nov | 7 | calm |
| Dec | 6 | calm |
Hazard calendar for Valle de Santiago
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Valle de Santiago's rainy season runs June–September, when most of the year's rain falls.
Best time to visit Valle de Santiago
To characterize how pleasant the weather is in Valle de Santiago throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around late October, Valle de Santiago 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 Valle de Santiago for general outdoor tourist activities is from mid October to mid March, with a peak score in the first week of January.
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) | 8.6 | 8.2 | 6.9 | 5.3 | 4.4 | 4.4 | 4.9 | 5.2 | 5.5 | 7.0 | 8.2 | 8.7 |
| Rating | ideal | ideal | good | fair | fair | fair | fair | fair | good | good | ideal | ideal |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 8.6 | ideal |
| Feb | 8.2 | ideal |
| Mar | 6.9 | good |
| Apr | 5.3 | fair |
| May | 4.4 | fair |
| Jun | 4.4 | fair |
| Jul | 4.9 | fair |
| Aug | 5.2 | fair |
| Sep | 5.5 | good |
| Oct | 7.0 | good |
| Nov | 8.2 | ideal |
| Dec | 8.7 | ideal |
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 Valle de Santiago for hot-weather activities is from mid October to late May, with a peak score in the second week of March.
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 Valle de Santiago, 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.
For a warm-season trip around May (highs near 32°C), the essentials are light clothes and sun protection. In the cold season around January (highs near 25°C), pack light clothes and sun protection.
In May, Valle de Santiago sees daytime highs around 32°C and nights near 16°C. Pack light clothes and sun protection. About 6 days see rain.
UV index (midday) in Valle de Santiago 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 Valle de Santiago peaks around June 14 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 8 | 10 | 13 | 13 | 13 | 14 | 12 | 13 | 11 | 10 | 8 | 7 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 10 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 13 | Extreme |
| Jun | 14 | Extreme |
| Jul | 12 | Extreme |
| Aug | 13 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Extreme |
| Nov | 8 | Very high |
| Dec | 7 | Very high |
Average hourly UV index in Valle de Santiago
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 June the burn window is concentrated in the middle of the day: about 9 hours a day reach index 3 (protection recommended), and 7 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 | 8.5 | 9 | 8.5 | 8.5 | 7.5 | 7.5 | 6.5 | 6 |
| UV ≥ 6 (h/day) | 4 | 5 | 6 | 6.5 | 6.5 | 7 | 6 | 6.5 | 5.5 | 5 | 4 | 3 |
| 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 | 6.5 |
| Jun | 9 | 7 |
| Jul | 8.5 | 6 |
| Aug | 8.5 | 6.5 |
| Sep | 7.5 | 5.5 |
| Oct | 7.5 | 5 |
| Nov | 6.5 | 4 |
| Dec | 6 | 3 |
Air quality in Valle de Santiago 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 Valle de Santiago is worst in May — around 27 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 24 | 23 | 20 | 24 | 27 | 18 | 21 | 18 | 19 | 17 | 21 | 26 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 24 | Moderate |
| Feb | 23 | Moderate |
| Mar | 20 | Moderate |
| Apr | 24 | Moderate |
| May | 27 | Moderate |
| Jun | 18 | Moderate |
| Jul | 21 | Moderate |
| Aug | 18 | Moderate |
| Sep | 19 | Moderate |
| Oct | 17 | Moderate |
| Nov | 21 | Moderate |
| Dec | 26 | Moderate |
Growing season
Valle de Santiago 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. Valle de Santiago banks about 3,817 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around May.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 198 | 231 | 323 | 381 | 436 | 399 | 363 | 360 | 334 | 321 | 258 | 212 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 198 |
| Feb | 231 |
| Mar | 323 |
| Apr | 381 |
| May | 436 |
| Jun | 399 |
| Jul | 363 |
| Aug | 360 |
| Sep | 334 |
| Oct | 321 |
| Nov | 258 |
| Dec | 212 |
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.
Valle de Santiago receives about 6.1 kWh/m² a day of solar energy on average — intense — with a clear seasonal swing between 4.8 and 7.5 kWh/m².
The brighter stretch of the year lasts 6.1 months, from around Feb 18 to Aug 22. The brightest month is April, averaging about 7.4 kWh/m² (intense).
The dimmest month is December, down near 4.8 kWh/m² — roughly 35% less than the April peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.0 | 5.9 | 6.9 | 7.5 | 7.4 | 6.7 | 6.4 | 6.2 | 5.6 | 5.4 | 5.1 | 4.8 |
| Level | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 5.0 | Bright |
| Feb | 5.9 | Bright |
| Mar | 6.9 | Intense |
| Apr | 7.5 | Intense |
| May | 7.4 | Intense |
| Jun | 6.7 | Intense |
| Jul | 6.4 | Intense |
| Aug | 6.2 | Intense |
| Sep | 5.6 | Bright |
| Oct | 5.4 | Bright |
| Nov | 5.1 | Bright |
| Dec | 4.8 | Bright |
Where is Valle de Santiago?
Valle de Santiago sits at 20.4°N, 101.2°W, 1,792 m above sea level, in Mexico. The nearest listed city is Jaral del Progreso, 13 km away.
Topography around Valle de Santiago
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Valle de Santiago.
Within 3 km, the terrain around Valle de Santiago has only modest variations in elevation — a maximum elevation change of 162 m around an average of 1,746 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 763 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,584 m.
The land around Valle de Santiago is covered by cropland (40%) and artificial surfaces (34%) within 3 km, cropland (51%) within 16 km, and cropland (37%) and shrubs (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 Valle de Santiago (20.3915°, -101.191°, elevation 1,792 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).