San Miguel de Allende weather by month
San Miguel de Allende runs from about 15°C in December to 26°C in May, with July the wettest month at 207 mm.
warmest month
May
26°C
coolest month
December
15°C
wettest month
July
207 mm
worst air month
January
17 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 16°C | 3 mm | 286 h | 17 |
| February | 17°C | 14 mm | 298 h | 14 |
| March | 21°C | 0 mm | 364 h | 16 |
| April | 22°C | 0 mm | 365 h | 15 |
| May | 26°C | 13 mm | 390 h | 14 |
| June | 22°C | 89 mm | 354 h | 10 |
| July | 19°C | 207 mm | 343 h | 16 |
| August | 19°C | 80 mm | 355 h | 11 |
| September | 19°C | 119 mm | 305 h | 9 |
| October | 18°C | 12 mm | 313 h | 10 |
| November | 18°C | 2 mm | 324 h | 14 |
| December | 15°C | 3 mm | 321 h | 15 |
About 4,018 hours of sun a year. Roughly 53 rainy days a year.
These are long-run climate normals, not a forecast. A given year can sit well outside them. PM2.5 is a global model: near the coast it counts sea salt as fine particulate and reads high against ground stations, sometimes by a factor of two. Use the shape of the year, not the absolute number.
where these numbers come from
- · Temperature, rainfall and sunshine: ECMWF ERA5 reanalysis climate normals via Open-Meteo (CC BY 4.0), fetched once and stored.
- · PM2.5: Copernicus CAMS reanalysis, monthly means. Modelled, not station readings; near coasts CAMS counts sea salt as PM2.5 and reads high.
Last reviewed 2026-05-23. Full method, licences and the list of sources we rejected are on the methodology page.