SAN MIGUEL DE ALLENDE · GUANAJUATO · MAY
May in San Miguel de Allende brings bright afternoons and cool mornings: the average high reaches 87.4°F and the average low sits at 55.8°F. The pink neo-Gothic towers of the Parroquia de San Miguel Arcángel rise over the Jardín Principal, and on May 15 they get 13 hours and 11 minutes of daylight.
The rain starts to show up: 1.57 inches across an average May, spread over 5.6 days. That leaves room to build a vacation around a cactus reserve, a ruin and a hot-spring soak, with an umbrella in the day bag.
THE MONTH AT A GLANCE · SAN MIGUEL DE ALLENDE
May in San Miguel de Allende means warm afternoons, cool mornings and rain that is only beginning to show up, so pack a layer and plan two days on foot.
AVG HIGH 87.4°F · AVG LOW 55.8°F · 5.6 RAIN DAYS · TOWN AT 1,917 M
Go for: long walking days, a cactus reserve, a ruin and hot-spring soaks, with warm afternoons and cool mornings.
Think twice before: planning a fully dry trip. Rain falls on 5.6 days in an average May, and June brings 10.7.
The rain builds by the month: 0.55 inches in April, 1.57 in May, 4.52 in June.
Climate: SMN (CONAGUA) station 11093 · Daylight: sunrise-sunset.org · Sites: INAH and El Charco del Ingenio · dated notes at the bottom
On this page
- San Miguel de Allende weather in MayHighs of 87.4°F, lows of 55.8°F and 5.6 rain days
- How warm are the mornings and nights?The 31.6-degree gap between day and night, and what to pack
- Is San Miguel de Allende busy or expensive in May?What we could and could not verify on crowds, prices and lodging tax
- What to do in San Miguel de Allende in MayCañada de la Virgen, El Charco del Ingenio and the hot springs, with fees and hours
- San Miguel de Allende itinerary for MayTwo days timed to a 7:14 p.m. sunset
- San Miguel de Allende in May vs April and JuneRain days: 2.4, 5.6 and 10.7
- Is May a good time to go?Who should book May and who should shift a month
The town sits at 1,917 m, and its historic center of steep cobbled streets and colonial facades is closed to most through-traffic around the Jardín Principal. In May that makes for a month on foot: shoes with grip, a layer for the morning and a hat for the afternoon.
San Miguel de Allende weather in May: average highs, lows and rain days
| Measure | May average | In a day |
|---|---|---|
| Average high | 87.4°F | Afternoon heat, shade at midday |
| Average low | 55.8°F | Cool early morning, bring a layer |
| Precipitation | 1.57 inches | Spread over the month’s rain days |
| Rain days | 5.6 days | SMN’s own count of measurable rain |
| Day-to-night gap | 31.6 degrees | High minus low |
| Daylight, May 15 | 13 h 11 min | Sunrise 6:03 a.m., sunset 7:14 p.m. |
In an average May the high reaches 87.4°F, the low falls to 55.8°F and 1.57 inches of rain arrive. Every figure here comes from the Servicio Meteorológico Nacional (CONAGUA) 1991-2020 normals, read at the SMN’s own San Miguel de Allende station, number 11093, in town at 1,917 m. It is a thermometer in town, so spots outside it, like the hot-spring parks, can read differently, and any single May can run wetter or drier than the average.
Measurable rain falls on 5.6 days in an average May, by the weather service’s own count. That is roughly one wet day in a typical week, so most days keep their plans intact. The hot-spring parks on the road toward Dolores Hidalgo suit a wet day well, since getting wet is the plan.
The average high sits 31.6 degrees above the average low. Pack a sweater or light jacket for mornings near 55.8°F, then a hat and sunscreen for afternoons near 87.4°F, and comfortable shoes for the cobbles.
On May 15 daylight runs about 13 hours 11 minutes, from a 6:03 a.m. sunrise to a 7:14 p.m. sunset in Mexico City time, converted from the UTC times published by sunrise-sunset.org. Plan the plaza for the last hour before 7:14 p.m.
How warm is San Miguel de Allende in May?
The average May high is 87.4°F and the average low is 55.8°F, 31.6 degrees apart. There is no sea reading to give: San Miguel sits inland at 1,917 m, and the warm water to plan around is in the hot-spring parks on the road toward Dolores Hidalgo, for which we found no temperature reading.
Mornings at 55.8°F want a sweater. Afternoons at 87.4°F want a hat, sunscreen and a shady table at midday. A packable layer that fits in a day bag covers both ends of the day.
Frost: the normals we read give monthly averages only. We found no count of May nights at or below freezing, and an average low of 55.8°F sits well above it, so we do not expect frost, but we cannot cite a figure.
How busy is San Miguel de Allende in May? Crowds and prices
We found no occupancy series and no monthly hotel-rate series for San Miguel de Allende, so we place May in no price ranking. The one signal we can read is the weather calendar, where May falls between a drier April and a wetter June.
We found no booking-lead data, so no number of weeks appears here. Lock the flights and the bed in the same sitting, and choose a rate you can cancel over one that merely looks lower. Our travel basics cover the booking mechanics.
We could not verify the lodging-tax rate, so we give no percentage. Ask the property whether tax is inside the quoted rate, and compare final totals rather than nightly prices.
The one place extra money changes the month is location. The historic center is made of steep cobbled streets and closed to most through-traffic, so a room within walking distance of the Jardín Principal turns the midday break, at an average high of 87.4°F, into a short stroll back.
Things to do in San Miguel de Allende in May
May keeps the outdoor list open: 5.6 rain days on average, against 10.7 in June, leaves most days free for a ruin, a cactus reserve and a plaza.
Cañada de la Virgen is an INAH archaeological site, open Tuesday to Sunday, 10 a.m. to 6 p.m., with last entry at 4 p.m. Adults pay 100 pesos and children 25. A walk of almost a kilometer comes first, then 20-passenger vehicles run the final stretch. El Charco del Ingenio is a botanical garden and nature reserve with a collection of Mexican cactus and succulent species, many rare or endangered. It opens daily 9 a.m. to 5 p.m. for 100 pesos, or 50 pesos for students, teachers and seniors with ID.
Several hot-spring parks, fed by the same aquifer, sit a short drive out on the road toward Dolores Hidalgo. We could not verify their rates or hours, so call ahead. A spring-fed pool changes little from month to month, so what May changes is the air around it: a 55.8°F morning suits a soak, and an 87.4°F afternoon calls for shade at the cactus reserve.
Free: the Jardín Principal under the Parroquia’s pink towers, and the cobbled streets around it. Children under 10 enter El Charco del Ingenio free, and visitors from the surrounding indigenous communities enter Cañada de la Virgen free.
San Miguel de Allende itinerary for May
Be at El Charco del Ingenio for the 9 a.m. opening (100 pesos) and walk the cactus collection in the cool early hours. Head back to the historic center for the hottest stretch, when 87.4°F calls for a long lunch in the shade. In the late afternoon, climb to the Jardín Principal and settle in before the 7:14 p.m. sunset, when the Parroquia’s pink towers take the last light.
Day two belongs to Cañada de la Virgen. It opens at 10 a.m. and last entry is 4 p.m., so go in the morning: the walk of almost a kilometer before the final shuttle is easier before 87.4°F sets in. If the sky turns (rain falls on 5.6 days in an average May), keep the ruin for the next dry morning and spend the wet day in the hot-spring parks on the road toward Dolores Hidalgo.
San Miguel de Allende in May vs April and June
| Measure | April | May | June |
|---|---|---|---|
| Average high | 86.0°F | 87.4°F | 83.8°F |
| Average low | 52.5°F | 55.8°F | 56.1°F |
| Day-to-night gap | 33.5 degrees | 31.6 degrees | 27.7 degrees |
| Precipitation | 0.55 inches | 1.57 inches | 4.52 inches |
| Rain days | 2.4 days | 5.6 days | 10.7 days |
All three months come from the same SMN station (11093) and the same 1991-2020 period. May’s average high is 1.4 degrees above April’s and 3.6 degrees above June’s, and its low is 3.3 degrees above April’s and 0.3 degrees under June’s. Rain climbs from 0.55 inches in April to 1.57 in May and 4.52 in June, and rain days from 2.4 to 5.6 to 10.7. There is no sea to compare in an inland town.
Shifting four weeks earlier to April gives 3.2 fewer rain days and 1.02 inches less rain, with afternoons almost as warm. Shifting four weeks later to June gives afternoons 3.6 degrees cooler, at the cost of 5.1 more rain days and 2.95 inches more rain.
Is May a good time to visit San Miguel de Allende?
Yes, for anyone who wants long walking days: highs of 87.4°F, cool mornings at 55.8°F and rain on 5.6 days in an average month. It is a weaker pick if you want a guaranteed dry itinerary or dislike hot afternoons. Check the U.S. State Department’s Mexico travel advisory before you book: issued May 29, 2026, it rates the state of Guanajuato at Level 3, Reconsider Travel.
If the answer is no, choose April for a drier trip (0.55 inches and 2.4 rain days) or June for cooler afternoons (83.8°F on average) at the cost of 10.7 rain days.
May’s package is 13 hours 11 minutes of daylight on the 15th, from a 6:03 a.m. sunrise to a 7:14 p.m. sunset. If you are still choosing the month, our month-by-month guides lay the options side by side.
The last word
May in San Miguel is a month for the outdoors with a sweater in the morning bag: 55.8°F at dawn, 87.4°F by afternoon, and 13 hours 11 minutes of light between. Book the bed near the Jardín Principal, save one morning for El Charco del Ingenio (founded in 1991, open daily from 9 a.m.) and one late afternoon for the pink towers before 7:14 p.m. If the sky closes, take the road toward Dolores Hidalgo for a soak.
Sources & data
- May temperature, rainfall and rain days, 1991-2020 normals · Servicio Meteorológico Nacional (CONAGUA), station 11093 · checked Sep 30, 2026 · the SMN sheet does not publish its rain-day threshold
- April and June normals · same station and period · checked Sep 30, 2026
- Sunrise, sunset and daylight on May 15 · sunrise-sunset.org, converted to Mexico City time · checked Sep 30, 2026
- Cañada de la Virgen fees and hours · INAH · checked Sep 30, 2026
- El Charco del Ingenio fees and hours · elcharco.org.mx, rates posted December 2024 · checked Sep 30, 2026
- Travel advisory, issued May 29, 2026 · U.S. Department of State · checked Sep 30, 2026
- We found no occupancy series, hotel-rate series, lodging-tax rate, frost-night count or hot-spring rates, so none appears. The descriptions of the plaza, the historic center and the hot-spring parks are general knowledge. Hours and fees change, so confirm with each operator when you book.