Weather by Month - Lisbon
Temperature Comparison
The biggest temperature swing occurs between October and November, with a change of 5°C.
Jan
COOL
Feb
COOL
Mar
MILD
Apr
MILD
May
MILD
Jun
WARM
Jul
WARM
Aug
WARM
Sep
WARM
Oct
MILD
Nov
MILD
Dec
COOL
| Month | Low Temperature | High Temperature | Category |
|---|---|---|---|
| January | | | cool |
| February | | | cool |
| March | | | mild |
| April | | | mild |
| May | | | mild |
| June | | | warm |
| July | | | warm |
| August | | | warm |
| September | | | warm |
| October | | | mild |
| November | | | mild |
| December | | | cool |
Rain & Sunshine Patterns
Driest Months
#1 July
Best for: outdoor activities & sightseeing
#2 August
Best for: outdoor activities & sightseeing
#3 June
Best for: outdoor activities & sightseeing
Wettest Months
#1 December
Expect: possible showers, pack waterproofs
#2 November
Expect: possible showers, pack waterproofs
#3 October
Expect: possible showers, pack waterproofs
UV & Sun Protection Calendar
High UV Alert:
March, April, May, June, July, August, September require serious sun protection.
Jan
4
MODERATE
Feb
5
MODERATE
Mar
7
HIGH
Apr
8
HIGH
May
8
VERY-HIGH
Jun
8
VERY-HIGH
Jul
8
VERY-HIGH
Aug
8
VERY-HIGH
Sep
7
HIGH
Oct
6
MODERATE
Nov
4
MODERATE
Dec
3
MODERATE
Extreme (11+)
Avoid sun during midday, use SPF 50+
Very High (8-10)
Essential sun protection required
High (6-7)
Use SPF 30+, wear hat & sunglasses
Moderate (3-5)
Sun protection recommended
Low-Moderate (1-2)
Minimal protection needed
Low (0)
No protection required
Daylight Hours
Daylight varies from 9.5 hours in December (winter) to 14.8 hours in June (summer), which is a difference of 5.3 hours.
Shortest Days
December
9.5h
Average Sunrise:07:46
Average Sunset:17:17
Plan daytime activities for midday when light is best. Early sunsets mean evening plans should account for darkness.
Longest Days
June
14.8h
Average Sunrise:05:12
Average Sunset:20:01
Extended daylight perfect for evening activities and late dining. You can fit more sightseeing into each day.
Wind & Humidity Overview
Wind Conditions
Average wind speed
Windiest months:
July (18 km/h)
August (17 km/h)
June (17 km/h)
Packing tip: Conditions are generally calm, but a light layer is always handy.
Humidity Levels
Average humidity
76%
Most humid:
December (83%)
Least humid:
August (70%)
Packing tip: Choose breathable, natural fabrics like cotton or linen for comfort in humid conditions.
Seasonal Overview
Northern Hemisphere seasons shape the weather patterns throughout the year. Here's what to expect in each season:
Winter
January, February, December
Avg High 14°C
Avg Low 10°C
Avg Rain 70 mm
Cool weather; bring layers and a jacket
Spring
March, April, May
Avg High 19°C
Avg Low 12°C
Avg Rain 49 mm
Variable conditions; layer your clothing
Summer
June, July, August
Avg High 26°C
Avg Low 18°C
Avg Rain 6 mm
Warm and pleasant; perfect for travel
Autumn
September, October, November
Avg High 21°C
Avg Low 15°C
Avg Rain 65 mm
Mild conditions; transitional weather
Monthly Details
Click any month for detailed weather information and packing advice.
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View Best Time to VisitFrequently Asked Questions
When is Lisbon warmest?
August is typically the warmest month in Lisbon, with average high temperatures reaching around 27°C (81°F). This is peak summer weather, ideal for outdoor activities and sightseeing.
When is Lisbon coldest?
January is usually the coldest month, with average low temperatures dropping to around 9°C (48°F). Pack warm layers if visiting during this time, especially for evening activities.
When does Lisbon get the most rain?
December typically sees the most rainfall in Lisbon, averaging around 86mm (3.4 inches). It's wise to pack waterproof layers and have some indoor backup plans if you're visiting during this month.
What is the driest month in Lisbon?
July is typically the driest month, with average rainfall of just 3mm (0.1 inches). This makes it an excellent time for outdoor exploration and activities with minimal risk of rain disruption.
How much does the temperature vary in Lisbon throughout the year?
Temperatures in Lisbon range from average lows of 14°C (57°F) to highs of 20°C (68°F). This variation means you'll want to pack differently depending on when you visit—layers are key for adapting to the seasonal changes.
Do I need sun protection when visiting Lisbon?
Yes, sun protection is important in Lisbon. UV levels can reach 8 during peak months, which is considered very high. Pack sunscreen (SPF 30+), sunglasses, and a hat, especially if you'll be outdoors for extended periods.