Climate averages 1991–2020
Pori weather
in May.
A cool, fairly dry month: the 5th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a cool month in Pori: daytime highs average 12.5°C and nights cool to about 5.6°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 39 mm of rain on roughly 8 days, which makes May a fairly dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 17 h 30 min on an average May day.
The nearest other city in this atlas is Tampere (106 km away). In May its highs average 13.2°C, 0.7°C warmer than Pori, with 45 mm of rain.
Among the 13 cities listed in Finland, Pori ranks 10th of 13 for the warmest May highs and 1st of 13 for the driest May (rainfall, lowest first). The mean May high of those 13 cities is 13.2°C; Pori is 0.7°C cooler than that mean.
From May to June, average highs rise by 4.3°C to 16.8°C, and monthly rainfall rises from 39 mm to 60 mm.
The annual picture
May in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Pori climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -1.5°C-5.3°C | -5.3°C | 43 | 10.2 | 6.46 h |
| February | -2.1°C-6.5°C | -6.5°C | 34 | 8.0 | 8.99 h |
| March | 1.2°C-4.1°C | -4.1°C | 33 | 8.3 | 11.712 h |
| April | 7.0°C0.6°C | 0.6°C | 33 | 8.2 | 14.715 h |
| May, selected | 12.5°C5.6°C | 5.6°C | 39 | 7.8 | 17.517 h |
| June | 16.8°C10.4°C | 10.4°C | 60 | 10.3 | 19.319 h |
| July | 20.0°C14.0°C | 14.0°C | 74 | 11.7 | 18.518 h |
| August | 19.0°C13.5°C | 13.5°C | 74 | 12.2 | 15.916 h |
| September | 14.1°C9.4°C | 9.4°C | 62 | 10.2 | 13.013 h |
| October | 7.7°C4.2°C | 4.2°C | 65 | 11.5 | 10.110 h |
| November | 3.2°C0.4°C | 0.4°C | 56 | 11.1 | 7.37 h |
| December | 0.4°C-2.9°C | -2.9°C | 52 | 11.5 | 5.66 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Tampere in MayFinland · 106 kmHigh 13.2°C · Low 5.2°C · 45 mm rain
- Turku in MayFinland · 117 kmHigh 14.4°C · Low 5.4°C · 41 mm rain
- Mariehamn in MayAland Islands · 184 kmHigh 9.7°C · Low 6.1°C · 33 mm rain
- Espoo in MayFinland · 210 kmHigh 12.9°C · Low 6.2°C · 43 mm rain
- Lahti in MayFinland · 215 kmHigh 14.5°C · Low 5.6°C · 48 mm rain
- Vantaa in MayFinland · 220 kmHigh 14.8°C · Low 5.9°C · 44 mm rain
- Jyväskylä in MayFinland · 223 kmHigh 13.5°C · Low 5.1°C · 48 mm rain
- Helsinki in MayFinland · 224 kmHigh 13.1°C · Low 6.0°C · 44 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Pori) is explained once on the Pori year overview and on the Sources, method and limits page.