Bilbao Weather in May
Average highs run from 16°C on May 1 to 19°C on May 31, and lows from 12°C to 15°C. Normal precipitation for the month is 62 mm over about 12 wet days.
May day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
May at a glance
- Average high
- 17°C
- Average low
- 13°C
- Precipitation
- 62 mm
- Reanalysis high
- 28°CMay 25, 2005
- Reanalysis low
- 8°CMay 17, 2013
- Daylight
- 14 h 08 min to 15 h 09 min
- Cloud cover
- 72%
- Humidity
- 79%
- Dew point
- 11°C
- Wind
- 15.8 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Reanalysis high | Reanalysis low | Chance wet |
|---|---|---|---|---|---|
| May 1 | 16°C | 12°C | 22°C 2005 | 9°C 1991 | 46% |
| May 2 | 16°C | 12°C | 27°C 1997 | 8°C 2001 | 46% |
| May 3 | 16°C | 12°C | 24°C 2008 | 9°C 1991 | 45% |
| May 4 | 16°C | 12°C | 25°C 2020 | 9°C 1991 | 44% |
| May 5 | 16°C | 12°C | 23°C 1995 | 8°C 2019 | 43% |
| May 6 | 16°C | 12°C | 22°C 2011 | 9°C 1991 | 42% |
| May 7 | 16°C | 12°C | 23°C 2008 | 8°C 2001 | 42% |
| May 8 | 17°C | 12°C | 22°C 2020 | 8°C 1991 | 40% |
| May 9 | 17°C | 12°C | 23°C 2012 | 10°C 2004 | 40% |
| May 10 | 17°C | 13°C | 27°C 2012 | 10°C 1991 | 39% |
| May 11 | 17°C | 13°C | 23°C 1999 | 10°C 1991 | 39% |
| May 12 | 17°C | 13°C | 22°C 2007 | 10°C 2010 | 39% |
| May 13 | 17°C | 13°C | 26°C 1992 | 10°C 2010 | 38% |
| May 14 | 17°C | 13°C | 23°C 2006 | 9°C 2010 | 38% |
| May 15 | 17°C | 13°C | 24°C 2002 | 10°C 1991 | 37% |
| May 16 | 17°C | 13°C | 27°C 2002 | 10°C 1991 | 35% |
| May 17 | 17°C | 13°C | 25°C 2006 | 8°C 2013 | 35% |
| May 18 | 17°C | 13°C | 23°C 2004 | 10°C 1996 | 35% |
| May 19 | 18°C | 13°C | 24°C 2004 | 10°C 1996 | 35% |
| May 20 | 18°C | 13°C | 24°C 2004 | 10°C 2013 | 35% |
| May 21 | 18°C | 13°C | 23°C 2017 | 10°C 1993 | 35% |
| May 22 | 18°C | 14°C | 24°C 1995 | 11°C 1996 | 34% |
| May 23 | 18°C | 14°C | 23°C 1993 | 11°C 2013 | 34% |
| May 24 | 18°C | 14°C | 23°C 2010 | 10°C 2013 | 35% |
| May 25 | 18°C | 14°C | 28°C 2005 | 10°C 2013 | 34% |
| May 26 | 18°C | 14°C | 26°C 2005 | 9°C 2013 | 34% |
| May 27 | 19°C | 14°C | 27°C 2005 | 12°C 2007 | 33% |
| May 28 | 19°C | 14°C | 26°C 2001 | 11°C 2013 | 33% |
| May 29 | 19°C | 14°C | 25°C 2001 | 11°C 2013 | 34% |
| May 30 | 19°C | 15°C | 27°C 1996 | 12°C 2013 | 34% |
| May 31 | 19°C | 15°C | 24°C 2020 | 12°C 2013 | 35% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+2).
- May 1
- sunrise 7:05 AM, sunset 9:13 PM
- May 31
- sunrise 6:35 AM, sunset 9:44 PM
Other months
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.