Cabo San Lucas weather in May
In May, Cabo San Lucas has daytime highs averaging 28 °C, nights around 21 °C, with 0.1 wet days, and a sea temperature of 22 °C. Figures are 1991–2020 climate normals.
- 28.0°C Average high
- 21.2°C Average low
- 0.1days Wet days
- under 1mm Rainfall
- 22.2°C Sea temperature
- 13h 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 | 27.8 °C | 20.8 °C | 0 % |
| 11–20 May | 28.1 °C | 21.2 °C | 0 % |
| 21–31 May | 28.1 °C | 21.5 °C | 1 % |
What to expect
| Measure | Typical May | Share of the month |
|---|---|---|
| Days above 25 °C | 30 of 31 | 98 % |
| Days above 30 °C | 3.2 of 31 | 10 % |
| Days below 0 °C | 0 of 31 | 0 % |
| Days with more than 1 mm rain | 0.1 of 31 | 0 % |
Conditions in May
| Measure | Average |
|---|---|
| Mean temperature | 25 °C |
| Record high (1991–2020) | 37 °C |
| Record low (1991–2020) | 16 °C |
| Relative humidity | 59 % |
| Wind speed | 21 km/h |
| Cloud cover | 24 % |
Where Cabo San Lucas ranks in May
| Ranking | Position | Value |
|---|---|---|
| The driest places in North America in May | 2nd of 50 | 0.4 mm |
| Best beach destinations in the world in May | 13th of 50 | 95/100 |
| The driest places in the world in May | 33rd of 50 | 0.4 mm |
May compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| March | 25.8 °C | 1 mm | 33 % |
| April | 26.8 °C | under 1 mm | 36 % |
| May | 28.0 °C | under 1 mm | 24 % |
| June | 29.0 °C | 7 mm | 17 % |
| July | 30.8 °C | 17 mm | 42 % |
See all twelve months for Cabo San Lucas
- May is the 7th warmest month here.
- It is the 1st driest month of the year.
- It ranks 2nd for least cloud cover.
- Days last about 13 hours from sunrise to sunset.
- It rains on 0.1 of 31 days — 0 % of the month.
- Nights are about 6.8 °C cooler than the middle of the day.
- The hottest May day on record since 1991 reached 37 °C, 8.5 °C above the usual daytime high.
- Beach score: 95 / 100 — see how this is calculated.
QuestionsMay in Cabo San Lucas, answered
How warm is Cabo San Lucas in May?
Daily highs average 28 °C and nights fall to about 21 °C, a spread of 6.8 °C between afternoon and dawn. That makes May the 7th warmest month of the year here.
Does it rain much in Cabo San Lucas in May?
May averages under 1 mm of rain, spread over about 0 of the 31 days — 0 % of the month. Cloud cover averages 24 % of the sky.
Is the sea warm enough to swim in May?
The sea averages 22 °C off Cabo San Lucas 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?
Cabo San Lucas averages 13 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.