yearsofweather

Lisbon in May:
comfortably warm, little rain

Lisbon, Portugal · Records from 2006 to 2025. Not a forecast.

Mean high24°Hottest day 33.4° (2019)
Mean low15°Coldest night 10.3° (2013)
Rain days4 days0-10 by year
Rainfall45mmDaylight 13.8 → 14.7 h
Lisbon's 12 months iBest: May to July
Trip types Beach Poorcool seaSightseeing on foot Goodmild and mostly dry
Sea temperature17°16.5-17.5° by year (last 6)
Sunrise / sunset (15th)06:25 / 20:41Daylight 13.8 → 14.7 h

Lisbon in May

Rain falls off sharply and short sleeves are fine by day. Late-spring flowers are out in the streets and long evenings suit a stroll. The sea is still cold, so beach time is mostly sunbathing.

May in Lisbon was on the warm side, averaging 24°C by day and 15°C at night. With about 4 rain days, showers were an occasional nuisance rather than the rule. In 2006, May had no rain day at all; in 2008 it had 10.

With up to 14.7 hours of daylight, dinner plans could still start in the light. About 1 day a month still climbed past 30°C, the ones where you looked for shade.

Hurricanes i No tropical storm passed within 300 km in this month over the last 20 years. Hurricanes: September and October

Date by date i

‹ April May 2027 June ›
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
May 1rain on 20% of days21° 13°
2-8rain on 18% of days23° 14°
9-15rain on 16% of days23° 15°
16-22rain on 9% of days24° 15°
23-29rain on 11% of days24° 15°
30-31rain on 5% of days25° 16°

0-5/206-8/209-11/2012-20/20

May 1rain on 20% of days21° 13°
2-8rain on 18% of days23° 14°
9-15rain on 16% of days23° 15°
16-22rain on 9% of days24° 15°
23-29rain on 11% of days24° 15°
30-31rain on 5% of days25° 16°
Tap another date to change

2006none
2007none
20081mm
2009none
20105mm
2011none
2012none
2013none
2014none
2015none
201626mm
2017none
2018none
2019none
202020mm
202117mm
2022none
2023none
2024none
2025none
Holidays in May (2027)
  • May 1 Labour Day
  • May 27 Corpus Christi
  • May 31 Memorial Day

1 Local public holiday or break (busier, pricier)1 US holidays (flights fill up)

Day by day temperature i

12°20°27°35° 1815222931

Mean high Mean low Coldest to warmest high in 20 years

Your trip dates, the past 20 years

Trip dates ~

You can also click two dates on the axis. Hover a cell to see that day's rain.
Trip rain days Month rain days
2006
0 d 0 d
2007
1 d 4 d
2008
0 d 10 d
2009
0 d 3 d
2010
1 d 3 d
2011
2 d 8 d
2012
5 d 8 d
2013
0 d 1 d
2014
0 d 3 d
2015
2 d 2 d
2016
4 d 10 d
2017
2 d 6 d
2018
0 d 1 d
2019
2 d 2 d
2020
0 d 6 d
2021
0 d 2 d
2022
1 d 4 d
2023
1 d 3 d
2024
1 d 1 d
2025
3 d 5 d
Years with rain
Tap a date to start, tap another to end. Each cell is that date in one year.
'06'07'08'09'10'11'12'13'14'15'16'17'18'19'20'21'22'23'24'25
of 20
4
4
4
4
3
2
4
4
5
5
4
3
2
2
1
2
1
1
1
3
1
4
2
4
2
1
0
4
3
2
0
Rain days on trip
01001250024202001113

No rain1-9 mm10 mm or more Dates outside your trip are dimmed.

One row per year, one cell per day. 2006 had 0 rain days, 2008 had 10.

Lisbon through the year

MonthHighLowRain daysRainfallSea
January 15°9°10 days91mm 16°
February 16°10°9 days83mm 15°
March 18°11°8 days90mm 15°
April 21°13°8 days73mm 16°
MayGood 24°15°4 days45mm 17°
JuneGood 26°17°3 days15mm 18°
JulyGood 28°18°1 day2mm 18°
August 29°19°1 day4mm 18°
September 27°18°4 days36mm 19°
October 23°16°8 days98mm 18°
November 18°12°10 days132mm 18°
December 16°10°9 days102mm 16°

Common questions

Does it rain a lot in Lisbon in May?

Over the past 20 years May averaged 4 rain days (1 mm or more) out of 31. Individual years ran from 0 in the driest to 10 in the wettest.

What should I wear in Lisbon in May?

Days averaged 24°C and nights 15°C. Pack a light layer for the evenings, T-shirts, and a compact umbrella.

Can you swim in Lisbon in May?

Sea surface temperature averaged 17°C in May, too cold for most people without a wetsuit. Year to year it ranged 16.5-17.5°C. Check local flags for waves and jellyfish on the day.

Is May a good time to visit Lisbon?

On warmth and rain days alone, Lisbon's easiest months were May to July. May ranked first of 12.