San Isidro in Spring
In spring (March, April and May), San Isidro sees average daytime highs around 23°C and overnight lows near 9°C, with 141 mm of rain over about 25 wet days across the season. It is the warmest season of the year and the 3rd-wettest season.
Across spring, daytime highs hold fairly steady around 23°C. The sky is clear or mostly clear about 44% of the time across spring, and the air most often feels dry.
Spring is San Isidro's 2nd-best season to visit on our travel score. For the whole year in context, see San Isidro's year-round climate.
- Avg daytime high
- 23°C
- warmest season of the year
- Avg overnight low
- 9°C
- Rainfall
- 141 mm
- 25 wet days
- Avg wind
- 7 km/h
- Travel score
- 7.3
- 2nd-best season
- Months
- Mar · Apr · May
Temperature in San Isidro in Spring
Across spring, daytime highs hold fairly steady around 23°C.
A typical spring day in San Isidro reaches about 23°C and drops to 9°C overnight. The warmest of the three months is May, the coolest March.
San Isidro weather by month
How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 19° / 5° | 19 | 3.4 | 11 | 7.3 |
| Feb | 20° / 6° | 17 | 3.5 | 11.3 | 7.8 |
| Mar | 22° / 8° | 22 | 5.2 | 11.9 | 7.8 |
| Apr | 23° / 9° | 40 | 6.9 | 12.4 | 7.5 |
| May | 23° / 10° | 79 | 12.5 | 12.9 | 6.6 |
| Jun | 22° / 11° | 243 | 20.1 | 13.1 | 4.9 |
| Jul | 20° / 10° | 345 | 27 | 13 | 3.8 |
| Aug | 20° / 10° | 337 | 26.5 | 12.7 | 3.8 |
| Sep | 20° / 11° | 273 | 23.6 | 12.1 | 4.1 |
| Oct | 20° / 9° | 120 | 14 | 11.6 | 5.6 |
| Nov | 19° / 6° | 35 | 5.7 | 11.1 | 7.0 |
| Dec | 19° / 5° | 12 | 2.2 | 10.9 | 7.5 |
Cloud cover in Spring
The sky is clear or mostly clear about 44% of the time across spring.
Chance of precipitation in Spring
San Isidro gets around 141 mm of rain over 25 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 7 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 36 min in early March to 13 h 06 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 6.8 kWh/m².
Hazard calendar for San Isidro
None of San Isidro's seasonal hazards peak in spring. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
San Isidro's monsoon runs June–September, when most of the year's rain falls.
Is spring a good time to visit San Isidro?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is one of the better times to visit San Isidro for general sightseeing.
What to pack for San Isidro in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, San Isidro sees daytime highs around 23°C and nights near 9°C. Pack sun protection. Worth having: light clothes, a warm layer and rain gear. About 25 days see rain.
UV index in San Isidro in Spring
Clear-sky midday UV across spring averages around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in San Isidro peaks around April 10 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 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) | 9 | 12 | 14 | 15 | 11 | 14 | 12 | 14 | 12 | 11 | 9 | 8 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 9 | Very high |
| Feb | 12 | Extreme |
| Mar | 14 | Extreme |
| Apr | 15 | Extreme |
| May | 11 | Extreme |
| Jun | 14 | Extreme |
| Jul | 12 | Extreme |
| Aug | 14 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 8 | Very high |
Air quality in San Isidro in Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.
Air quality in San Isidro is worst in December — around 179 µg/m³ PM2.5 (very unhealthy), 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) | 149 | 141 | 126 | 113 | 134 | 126 | 135 | 127 | 136 | 137 | 174 | 179 |
| Level | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Very unhealthy | Very unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 149 | Unhealthy |
| Feb | 141 | Unhealthy |
| Mar | 126 | Unhealthy |
| Apr | 113 | Unhealthy |
| May | 134 | Unhealthy |
| Jun | 126 | Unhealthy |
| Jul | 135 | Unhealthy |
| Aug | 127 | Unhealthy |
| Sep | 136 | Unhealthy |
| Oct | 137 | Unhealthy |
| Nov | 174 | Very unhealthy |
| Dec | 179 | Very unhealthy |
Where is San Isidro?
San Isidro sits at 19.3°N, 99.0°W, 2,259 m above sea level, in Mexico. The nearest listed city is Emiliano Zapata, 3.0 km away.
Topography around San Isidro
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Isidro.
Within 3 km, the terrain around San Isidro has significant variations in elevation — a maximum elevation change of 473 m around an average of 2,316 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 550 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,473 m.
The land around San Isidro is covered by artificial surfaces (69%) within 3 km, artificial surfaces (50%) within 16 km, and trees (32%) and cropland (29%) 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 San Isidro (19.3397°, -98.9506°, elevation 2,259 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.