| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 2.2° | — | 49.7mm | 12.5 | 20 |
| February | 4.9° | -1.9° | 33.3mm | 10.3 | 25 |
| March | 10.3° | -0.3° | 26.8mm | 8.5 | 49 |
| April | 17.1° | 4.4° | 35.4mm | 8.6 | 74 |
| May | 21.6° | 9.1° | 60.1mm | 12.3 | 75 |
| June | 25° | 12.4° | 70.4mm | 11 | 78 |
| July | 27.1° | 13.9° | 63mm | 10.7 | 78 |
| August | 26.9° | 14.3° | 66.4mm | 10.3 | 79 |
| September | 21.4° | 10.3° | 63.9mm | 9.5 | 81 |
| October | 15.3° | 4.8° | 44.5mm | 9.7 | 66 |
| November | 9.1° | — | 34.7mm | 10 | 45 |
| December | 2.7° | — | 54.2mm | 11.1 | 23 |
January in Trenčín averages a daily high of 2.2°C. Expect roughly 12.5 wet days totalling 49.7mm. A hard month to visit for comfort alone.
February in Trenčín averages a daily high of 4.9°C with nights around -1.9°C. Expect roughly 10.3 wet days totalling 33.3mm. A hard month to visit for comfort alone.
March in Trenčín averages a daily high of 10.3°C with nights around -0.3°C. Expect roughly 8.5 wet days totalling 26.8mm. Demanding conditions — pack for it and plan indoor options.
April in Trenčín averages a daily high of 17.1°C with nights around 4.4°C. Expect roughly 8.6 wet days totalling 35.4mm. Generally workable, with some weather to plan around.
May in Trenčín averages a daily high of 21.6°C with nights around 9.1°C. Expect roughly 12.3 wet days totalling 60.1mm. Comfortable conditions for being outdoors all day.
June in Trenčín averages a daily high of 25°C with nights around 12.4°C. Expect roughly 11 wet days totalling 70.4mm. Comfortable conditions for being outdoors all day.
July in Trenčín averages a daily high of 27.1°C with nights around 13.9°C. Expect roughly 10.7 wet days totalling 63mm. Comfortable conditions for being outdoors all day.
August in Trenčín averages a daily high of 26.9°C with nights around 14.3°C. Expect roughly 10.3 wet days totalling 66.4mm. Comfortable conditions for being outdoors all day.
September in Trenčín averages a daily high of 21.4°C with nights around 10.3°C. Expect roughly 9.5 wet days totalling 63.9mm. Comfortable conditions for being outdoors all day.
October in Trenčín averages a daily high of 15.3°C with nights around 4.8°C. Expect roughly 9.7 wet days totalling 44.5mm. Generally workable, with some weather to plan around.
November in Trenčín averages a daily high of 9.1°C. Expect roughly 10 wet days totalling 34.7mm. Demanding conditions — pack for it and plan indoor options.
December in Trenčín averages a daily high of 2.7°C. Expect roughly 11.1 wet days totalling 54.2mm. A hard month to visit for comfort alone.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Trenčín peaks at 81.
Based on 30 years of records, April–September scores highest for comfort in Trenčín, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 27.1°C.
June is the wettest, averaging 70.4mm of rain across roughly 11 wet days.
January is the coolest month, with average daily highs around 2.2°C.