Antigua Guatemala weather by month
Antigua Guatemala runs from about 18°C in November to 21°C in May, with June the wettest month at 668 mm.
warmest month
May
21°C
coolest month
November
18°C
wettest month
June
668 mm
worst air month
May
50 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 19°C | 1 mm | 335 h | 29 |
| February | 19°C | 7 mm | 327 h | 32 |
| March | 21°C | 15 mm | 359 h | 34 |
| April | 21°C | 43 mm | 343 h | 41 |
| May | 21°C | 60 mm | 350 h | 50 |
| June | 19°C | 668 mm | 195 h | 33 |
| July | 19°C | 173 mm | 329 h | 34 |
| August | 19°C | 159 mm | 340 h | 35 |
| September | 19°C | 250 mm | 294 h | 35 |
| October | 19°C | 139 mm | 307 h | 34 |
| November | 18°C | 113 mm | 278 h | 30 |
| December | 18°C | 16 mm | 303 h | 30 |
About 3,760 hours of sun a year. Roughly 128 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 2026-05-27. Full method, licences and the list of sources we rejected are on the methodology page.