Palermo weather in May
In May, Palermo has daytime highs averaging 23 °C, nights around 15 °C, with 5.9 wet days, and a sea temperature of 19 °C. Figures are 1991–2020 climate normals.
- 22.7°C Average high
- 15.4°C Average low
- 5.9days Wet days
- 36mm Rainfall
- 18.6°C Sea temperature
- 14h Daylight
Daily temperatures through May
How May develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 May | 21.2 °C | 14.0 °C | 21 % |
| 11–20 May | 22.7 °C | 15.4 °C | 18 % |
| 21–31 May | 23.8 °C | 16.6 °C | 18 % |
- Average highs rise from 21.2 °C early in May to 23.8 °C by the end of it.
What to expect
| Measure | Typical May | Share of the month |
|---|---|---|
| Days above 25 °C | 6.3 of 31 | 20 % |
| Days above 30 °C | 0.8 of 31 | 3 % |
| Days below 0 °C | 0 of 31 | 0 % |
| Days with more than 1 mm rain | 5.9 of 31 | 19 % |
Conditions in May
| Measure | Average |
|---|---|
| Mean temperature | 19 °C |
| Record high (1991–2020) | 37 °C |
| Record low (1991–2020) | 9.2 °C |
| Relative humidity | 72 % |
| Wind speed | 13 km/h |
| Cloud cover | 39 % |
Where Palermo ranks in May
| Ranking | Position | Value |
|---|---|---|
| Warmest sea temperatures in Europe in May | 10th of 50 | 19 °C |
| Places with the best weather in Europe in May | 11th of 50 | 95/100 |
| Best beach destinations in Europe in May | 13th of 50 | 66/100 |
| The warmest places in Europe in May | 26th of 50 | 23 °C |
| The driest places in Europe in May | 32nd of 50 | 36 mm |
| Places with the best weather in the world in May | 45th of 50 | 95/100 |
May compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| March | 16.3 °C | 67 mm | 50 % |
| April | 18.8 °C | 59 mm | 49 % |
| May | 22.7 °C | 36 mm | 39 % |
| June | 27.0 °C | 15 mm | 24 % |
| July | 29.9 °C | 7 mm | 9 % |
See all twelve months for Palermo
- May is the 6th warmest month here.
- It is the 4th driest month of the year.
- It ranks 5th for least cloud cover.
- Days last about 14 hours from sunrise to sunset.
- It rains on 5.9 of 31 days — 19 % of the month.
- Nights are about 7.3 °C cooler than the middle of the day.
- The hottest May day on record since 1991 reached 37 °C, 14 °C above the usual daytime high.
- Beach score: 66 / 100 — see how this is calculated.
QuestionsMay in Palermo, answered
How warm is Palermo in May?
Daily highs average 23 °C and nights fall to about 15 °C, a spread of 7.3 °C between afternoon and dawn. That makes May the 6th warmest month of the year here.
Does it rain much in Palermo in May?
May averages 36 mm of rain, spread over about 6 of the 31 days — 19 % of the month. Cloud cover averages 39 % of the sky.
Is the sea warm enough to swim in May?
The sea averages 19 °C off Palermo in May. Most people find water below 20 °C bracing and above 25 °C comfortable for a long swim; this figure is a monthly surface average, so a sheltered bay on a still afternoon can be warmer.
How long are the days in May?
Palermo averages 14 hours between sunrise and sunset in May. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.