Tijuana weather by month
Tijuana runs from about 12°C in January to 21°C in August, with March the wettest month at 141 mm.
warmest month
August
21°C
coolest month
January
12°C
wettest month
March
141 mm
worst air month
March
21 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 12°C | 66 mm | 264 h | 18 |
| February | 13°C | 138 mm | 227 h | 17 |
| March | 13°C | 141 mm | 317 h | 21 |
| April | 14°C | 15 mm | 325 h | 11 |
| May | 16°C | 6 mm | 348 h | 11 |
| June | 18°C | 0 mm | 374 h | 10 |
| July | 21°C | 0 mm | 384 h | 10 |
| August | 21°C | 1 mm | 375 h | 15 |
| September | 21°C | 5 mm | 320 h | 14 |
| October | 19°C | 2 mm | 320 h | 16 |
| November | 15°C | 7 mm | 289 h | 16 |
| December | 13°C | 1 mm | 273 h | 17 |
About 3,816 hours of sun a year. Roughly 40 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.