Greece has two good windows: Mar–Jun and Sep–Nov. They sit either side of the season the climate record rules out, which is why the shoulder months matter here. The recommended window is Apr–Jun, Aug–Nov.
Hot dry summers, wet winters
| Month | High °C | High °F | Rainy days | Verdict |
|---|---|---|---|---|
| January | 12.1 | 54 | 33% | Fair |
| February | 12.8 | 55 | 33% | Fair |
| March | 15.2 | 59 | 27% | Go |
| April | 19.0 | 66 | 18% | Go |
| May | 24.7 | 76 | 15% | Go |
| June | 29.9 | 86 | 11% | Go |
| July | 32.2 | 90 | 7% | Fair |
| August | 31.9 | 89 | 5% | Fair |
| September | 28.3 | 83 | 14% | Go |
| October | 23.2 | 74 | 20% | Go |
| November | 18.0 | 64 | 29% | Go |
| December | 13.6 | 56 | 33% | Fair |
Verdict combines mean daytime high with rainy-day frequency. “Rainy days” is the share of days in the month with at least 1 mm of rain.
August is the driest month, with rain on 5% of days and daytime highs near 31.9°C (89°F). January is the wettest, at 33%. Temperature swings hard across the year — 20.1°C between July (32.2°C / 90°F) and January (12.1°C / 54°F) — so packing for the wrong month is the main risk.