| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -1.1° | -7° | 37.5mm | 13.8 | 4 |
| February | -1.4° | -7.9° | 51.6mm | 15.2 | 0 |
| March | 2.3° | -5.2° | 38.1mm | 11.8 | 11 |
| April | 8.8° | -0.5° | 26.5mm | 8.8 | 43 |
| May | 14.6° | 4.1° | 39.5mm | 10.4 | 62 |
| June | 19.7° | 9.3° | 75.6mm | 11.2 | 77 |
| July | 22° | 12.4° | 60.8mm | 12.4 | 75 |
| August | 20.9° | 11.3° | 55.8mm | 11 | 78 |
| September | 15.6° | 7° | 59.4mm | 9.8 | 66 |
| October | 9° | 3° | 73.2mm | 14.2 | 36 |
| November | 3.1° | -1.5° | 53.4mm | 12 | 17 |
| December | -0.3° | -5.8° | 47.8mm | 15.4 | 3 |
January in Pori averages a daily high of -1.1°C with nights around -7°C. Expect roughly 13.8 wet days totalling 37.5mm. A hard month to visit for comfort alone.
February in Pori averages a daily high of -1.4°C with nights around -7.9°C. Expect roughly 15.2 wet days totalling 51.6mm. A hard month to visit for comfort alone.
March in Pori averages a daily high of 2.3°C with nights around -5.2°C. Expect roughly 11.8 wet days totalling 38.1mm. A hard month to visit for comfort alone.
April in Pori averages a daily high of 8.8°C with nights around -0.5°C. Expect roughly 8.8 wet days totalling 26.5mm. Demanding conditions — pack for it and plan indoor options.
May in Pori averages a daily high of 14.6°C with nights around 4.1°C. Expect roughly 10.4 wet days totalling 39.5mm. Generally workable, with some weather to plan around.
June in Pori averages a daily high of 19.7°C with nights around 9.3°C. Expect roughly 11.2 wet days totalling 75.6mm. Comfortable conditions for being outdoors all day.
July in Pori averages a daily high of 22°C with nights around 12.4°C. Expect roughly 12.4 wet days totalling 60.8mm. Comfortable conditions for being outdoors all day.
August in Pori averages a daily high of 20.9°C with nights around 11.3°C. Expect roughly 11 wet days totalling 55.8mm. Comfortable conditions for being outdoors all day.
September in Pori averages a daily high of 15.6°C with nights around 7°C. Expect roughly 9.8 wet days totalling 59.4mm. Generally workable, with some weather to plan around.
October in Pori averages a daily high of 9°C with nights around 3°C. Expect roughly 14.2 wet days totalling 73.2mm. Demanding conditions — pack for it and plan indoor options.
November in Pori averages a daily high of 3.1°C with nights around -1.5°C. Expect roughly 12 wet days totalling 53.4mm. A hard month to visit for comfort alone.
December in Pori averages a daily high of -0.3°C with nights around -5.8°C. Expect roughly 15.4 wet days totalling 47.8mm. 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. Pori peaks at 78.
Based on 30 years of records, June–August scores highest for comfort in Pori, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 22°C.
June is the wettest, averaging 75.6mm of rain across roughly 11.2 wet days.
February is the coolest month, with average daily highs around -1.4°C.