🇬🇷 Weather in Heraklion in May
This is what the weather in Heraklion (Crete, Greece) was like in May in 2017–2026.
Key facts at a glance
Avg. daytime high
22.6 °C
20.7 °C – 24.0 °C
Avg. night-time low
17.9 °C
17.0 °C – 19.6 °C
Avg. rain days in period
5.5
18 % of days · ≥ 1.0 mm
Avg. precipitation in period
17.7 mm
9.4 mm – 33.8 mm
Avg. cloud cover
46 %
This data source has no sunshine hours – average cloud cover shown instead.
Avg. sea temperature
–
Sea temperature unavailable for today (daily limit).
Extremes: Highest temperature 32.7 °C (17 May 2020) · Lowest temperature 13.1 °C (3 May 2026) · Avg. daily peak wind 23 km/h
Weather mix of all days
- 110Sunny
- 102Partly cloudy
- 43Cloudy
- 50Light rain
- 5Rain
Summary
- On average 22.6 °C during the day and 17.9 °C at night.
- On average 5.5 rain days (Rain day = at least 1.0 mm of precipitation) with 17.7 mm of precipitation in total.
- Prevailing: Sunny.
- Warmest year: 2018 (avg. 24.0 °C), coolest: 2023 (avg. 20.7 °C).
- Wettest year: 2023 (33.8 mm), driest: 2021 (9.4 mm).
- Extremes: 32.7 °C on 17 May 2020 and 13.1 °C on 3 May 2026.
Overall values from all 10 years. How is this calculated?
Charts
Temperatures per year
Average over your travel period
Precipitation & rain days
Year by year
2026
Avg. max21.7°Avg. min17.5°- Rain days
- 5 Rain days
- Precipitation
- 25.2 mm
- Avg. cloud cover
- 47 % cloudy
- Sea temperature
- –
Max 26.1 °C · Min 13.1 °C
2025
Avg. max22.9°Avg. min18.1°- Rain days
- 8 Rain days
- Precipitation
- 25.8 mm
- Avg. cloud cover
- 53 % cloudy
- Sea temperature
- –
Max 29.4 °C · Min 14.2 °C
2024
Avg. max22.8°Avg. min18.4°- Rain days
- 5 Rain days
- Precipitation
- 15.2 mm
- Avg. cloud cover
- 50 % cloudy
- Sea temperature
- –
Max 28.2 °C · Min 16.1 °C
2023
Avg. max20.7°Avg. min17.0°- Rain days
- 12 Rain days
- Precipitation
- 33.8 mm
- Avg. cloud cover
- 63 % cloudy
- Sea temperature
- –
Max 25.8 °C · Min 15.3 °C
2022
Avg. max22.4°Avg. min17.5°- Rain days
- 3 Rain days
- Precipitation
- 9.4 mm
- Avg. cloud cover
- 35 % cloudy
- Sea temperature
- –
Max 30.3 °C · Min 14.8 °C
2021
Avg. max23.6°Avg. min18.5°- Rain days
- 3 Rain days
- Precipitation
- 9.4 mm
- Avg. cloud cover
- 31 % cloudy
- Sea temperature
- –
Max 29.7 °C · Min 15.8 °C
2020
Avg. max23.1°Avg. min18.0°- Rain days
- 3 Rain days
- Precipitation
- 10.6 mm
- Avg. cloud cover
- 35 % cloudy
- Sea temperature
- –
Max 32.7 °C · Min 15.2 °C
2019
Avg. max22.3°Avg. min17.0°- Rain days
- 4 Rain days
- Precipitation
- 10.7 mm
- Avg. cloud cover
- 53 % cloudy
- Sea temperature
- –
Max 28.5 °C · Min 14.2 °C
2018
Avg. max24.0°Avg. min19.6°- Rain days
- 4 Rain days
- Precipitation
- 13.5 mm
- Avg. cloud cover
- 45 % cloudy
- Sea temperature
- –
Max 29.8 °C · Min 17.6 °C
2017
Avg. max22.3°Avg. min17.8°- Rain days
- 8 Rain days
- Precipitation
- 23.7 mm
- Avg. cloud cover
- 45 % cloudy
- Sea temperature
- –
Max 29.2 °C · Min 16.1 °C
Frequently asked questions
- How warm is it in Heraklion in May?
- Daytime highs averaged 22.6 °C, night-time lows 17.9 °C. The highest value of the past 10 years was 32.7 °C (17 May 2020), the lowest 13.1 °C (3 May 2026).
- How often does it rain in Heraklion in May?
- On average there were 5.5 rain days (at least 1 mm) with 17.7 mm of precipitation in total.
Check your exact travel dates
Choose your travel period – we show the weather for exactly those days.
Other destinations in May
Data sources
- Weather data
- Data obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program
Reanalysis (weather model constrained by observations) on a coarse grid of about 50 km. Values represent a large area and can differ from local conditions, especially on islands, coasts and in mountains. No sunshine duration.
Reanalysis (weather model constrained by observations)
Reanalysis values represent a grid cell (approx. 25–50 km) and may differ from local measurements on coasts, islands and in mountains. - Sea temperature
- MUR SST data were provided by JPL under support by NASA MEaSUREs program; accessed via NOAA CoastWatch ERDDAP
Daily multi-scale ultra-high resolution (≈ 1 km) analysis of satellite measurements (infrared, microwave) and in-situ data. Represents the foundation temperature below the daily warm surface layer. (Satellite and in-situ analysis) - Place search
- Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)