Romania has two good windows: Apr–Jun and Sep–Oct. 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–May, Sep–Oct.
Cold winters, warm summers
| Month | High °C | High °F | Rainy days | Verdict |
|---|---|---|---|---|
| January | 2.7 | 37 | 23% | Too cold |
| February | 6.3 | 43 | 22% | Fair |
| March | 11.9 | 53 | 23% | Fair |
| April | 18.0 | 64 | 29% | Go |
| May | 23.9 | 75 | 38% | Go |
| June | 28.5 | 83 | 42% | Go |
| July | 31.3 | 88 | 35% | Fair |
| August | 31.6 | 89 | 26% | Fair |
| September | 25.8 | 78 | 22% | Go |
| October | 18.6 | 65 | 22% | Go |
| November | 11.0 | 52 | 21% | Fair |
| December | 4.2 | 40 | 25% | Too cold |
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.
November is the driest month, with rain on 21% of days and daytime highs near 11.0°C (52°F). June is the wettest, at 42%. Temperature swings hard across the year — 28.9°C between August (31.6°C / 89°F) and January (2.7°C / 37°F) — so packing for the wrong month is the main risk. The record rules out too cold in Dec–Jan.