The best time to visit Sweden is May–Sep. Month by month, the verdicts rate Jun–Sep as comfortable on both daytime heat and rainfall — 4 months in all.
Cold; brief mild summer
| Month | High °C | High °F | Rainy days | Verdict |
|---|---|---|---|---|
| January | -1.2 | 30 | 33% | Too cold |
| February | -0.5 | 31 | 35% | Too cold |
| March | 3.2 | 38 | 32% | Too cold |
| April | 8.8 | 48 | 30% | Fair |
| May | 14.3 | 58 | 31% | Fair |
| June | 18.7 | 66 | 40% | Go |
| July | 22.1 | 72 | 39% | Go |
| August | 21.2 | 70 | 44% | Go |
| September | 16.2 | 61 | 35% | Go |
| October | 9.3 | 49 | 39% | Fair |
| November | 3.7 | 39 | 43% | Too cold |
| December | 0.2 | 32 | 41% | 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.
April is the driest month, with rain on 30% of days and daytime highs near 8.8°C (48°F). August is the wettest, at 44%. Temperature swings hard across the year — 23.3°C between July (22.1°C / 72°F) and January (-1.2°C / 30°F) — so packing for the wrong month is the main risk. The record rules out too cold in Nov–Mar.