Valongo, Portugal experiences average highs of 19°C (66°F) and lows of 11°C (52°F) throughout the year. Rainfall is moderate, averaging about 10 rainy days per month. Sunshine is abundant, averaging about 10 hours per day. Average highs have stayed broadly stable across the available records.
Valongo, Portugal Weather & Climate 2026
Monthly climate averages for Valongo, Portugal. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Feb–Sep 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
7.3/10
Best: June, July, August, September
UV Index
5
Low
Temperature 19°C / 11°C
Feels Like 19°C / 10°C
Rainy Days 10
Rainfall 107 mm
Sunshine 10 h
Humidity 79%
Wind Speed 18 km/h
Dew Point 12°C
Frost Days 2 days
Hottest Month
27°C
August
Avg Low17°C
Rain2days
Coldest Month
6°C
January
Avg High13°C
Rain12days
Driest Month
2days
August
Avg High27°C
Avg Low17°C
Windiest Month
19 km/h
March (Gusts 38)
Sea Temperature
14°C – 18°C
Warmest water: October (
18.3°C
)
Worst Time to Visit
Consider avoiding January, March, December due to frequent rain.
Sun Position
Sunrise 06:02
Daylight 15.1h
Sunset 21:10
Live conditions—
Valongo on the map · live conditions
Valongo, Portugal
- Continent
- Europe
- Country
- Portugal
- City
- Valongo
- Population
- 21.3K
- Coordinates
- 41.19°, -8.50°
Seasonal Breakdown
Spring
Mar–May
Avg High 18°C
Avg Low 10°C
Rain 11 days/mo
Summer
Jun–Aug
Avg High 26°C
Avg Low 16°C
Rain 4 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 20°C
Avg Low 13°C
Rain 11 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 14°C
Avg Low 7°C
Rain 12 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 13°C / 6°C . Feb: 15°C / 7°C . Mar: 15°C / 8°C . Apr: 18°C / 10°C . May: 21°C / 12°C . Jun: 23°C / 15°C . Jul: 27°C / 17°C . Aug: 27°C / 17°C . Sep: 24°C / 16°C . Oct: 21°C / 13°C . Nov: 16°C / 10°C . Dec: 14°C / 8°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 156 mm. Feb: 116 mm. Mar: 142 mm. Apr: 136 mm. May: 80 mm. Jun: 55 mm. Jul: 14 mm. Aug: 11 mm. Sep: 56 mm. Oct: 173 mm. Nov: 183 mm. Dec: 167 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 84%. Feb: 81%. Mar: 79%. Apr: 78%. May: 77%. Jun: 78%. Jul: 72%. Aug: 72%. Sep: 74%. Oct: 80%. Nov: 84%. Dec: 86%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 18 km/h . Feb: 18 km/h . Mar: 19 km/h . Apr: 18 km/h . May: 17 km/h . Jun: 17 km/h . Jul: 18 km/h . Aug: 17 km/h . Sep: 16 km/h . Oct: 17 km/h . Nov: 18 km/h . Dec: 18 km/h .
Sunshine
Sunshine
Sunshine: Jan: 6h. Feb: 8h. Mar: 9h. Apr: 11h. May: 12h. Jun: 13h. Jul: 13h. Aug: 12h. Sep: 11h. Oct: 8h. Nov: 7h. Dec: 6h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 14°C . Feb: 14°C . Mar: 14°C . Apr: 16°C . May: 16°C . Jun: 18°C . Jul: 18°C . Aug: 18°C . Sep: 17°C . Oct: 18°C . Nov: 17°C . Dec: 15°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 5. Apr: UV 6. May: UV 7. Jun: UV 8. Jul: UV 8. Aug: UV 7. Sep: UV 6. Oct: UV 4. Nov: UV 3. Dec: UV 2.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending wetter by about 15 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Aug 2025 · 28°C | Aug · 27°C |
| Coldest month | Dec 2025 · 7°C | Jan · 6°C |
| Wettest month | Nov 2025 · 343 mm | Nov · 183 mm |
| Windiest month | Jan 2025 · 22 km/h | Mar · 19 km/h |
Month-by-Month Weather Table
January
Fair 
February
Fair March
Fair April
Good May
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Good November
Wet December
Fair | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 13°C / 6°C | 11°C / 3°C | 12days (156 mm) Wet | 6.3h Fair | 84% Humid | 2.2 Moderate | Fair | View Details |
| February | 15°C / 7°C | 12°C / 4°C | 10days (116 mm) Wet | 7.6h Good | 81% Humid | 3.2 Moderate | Fair | View Details |
| March | 15°C / 8°C | 13°C / 5°C | 13days (142 mm) Wet | 9h Good | 79% Humid | 4.6 Moderate | Fair | View Details |
| April | 18°C / 10°C | 17°C / 8°C | 11days (136 mm) Wet | 10.6h Excellent | 78% Humid | 6.2 High | Good | View Details |
| May | 21°C / 12°C | 21°C / 11°C | 9days (80 mm) Wet | 11.9h Excellent | 77% Humid | 7 High | Good | View Details |
| June best | 23°C / 15°C | 24°C / 15°C | 8days (55 mm) Wet | 12.7h Excellent | 78% Humid | 7.5 Very High | Excellent | View Details |
| July best | 27°C / 17°C | 29°C / 18°C | 3days (14 mm) Excellent | 13.1h Excellent | 72% Muggy | 7.8 Very High | Excellent | View Details |
| August best | 27°C / 17°C | 29°C / 18°C | 2days (11 mm) Excellent | 12.3h Excellent | 72% Muggy | 7.2 Very High | Excellent | View Details |
| September best | 24°C / 16°C | 25°C / 16°C | 7days (56 mm) Good | 10.5h Excellent | 74% Muggy | 5.7 High | Excellent | View Details |
| October | 21°C / 13°C | 21°C / 13°C | 13days (173 mm) Wet | 8.1h Good | 80% Humid | 3.8 Moderate | Good | View Details |
| November | 16°C / 10°C | 14°C / 8°C | 14days (183 mm) Wet | 6.7h Fair | 84% Humid | 2.6 Moderate | Wet | View Details |
| December | 14°C / 8°C | 12°C / 5°C | 14days (167 mm) Wet | 6.1h Fair | 86% Very Muggy | 2.1 Moderate | Fair | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Valongo are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Valongo, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Valongo is August, with average daytime highs of 27°C (81°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Valongo is January, with average overnight lows of 6°C (43°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Valongo is November, averaging 183mm of precipitation across 14 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Valongo runs through November, December, March, October, with the heaviest rainfall in November. Based on 10-year averages for Valongo.
Valongo receives approximately 115 sunshine hours per year. The sunniest month is July with around 13 hours. Based on climate data for Valongo.
The least favorable months to visit Valongo are January, March, December, primarily due to frequent rain. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Valongo is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Valongo is 79%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Sea temperatures in Summer average 16°C (61°F), which most swimmers will find too cold without a wetsuit.
Valongo rarely sees significant snowfall but does experience frost, averaging 2 frost days during the colder months.
Average wind speeds in Valongo are 18 km/h (11 mph). The windiest month is March with peak winds reaching 19 km/h (12 mph) (gusts up to 38 km/h / 24 mph).
Valongo averages 6 clear-sky days per month with overall cloud cover around 54%. The clearest skies occur in July.
The annual average dew point in Valongo is 12°C (54°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Valongo has a Hot-Summer Mediterranean climate, classified as Csa under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Valongo ranges from 10°C (50°F) to 19°C (66°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Valongo. It earns a climate score of 8.9/10 with Excellent.
For June in Valongo, pack Umbrella, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. With average highs of 23°C (73°F) and 8 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
Last updated: