Monthly weather averages & travel planning

Europe › 🇵🇹 Portugal › Lisbon
Updated: March 2026
January is a fair time to visit Lisbon (4/10). With 8 daily sunshine hours and only 9 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 10th sunniest of the year in Lisbon. January suits travellers visiting for indoor culture, food, and architecture rather than outdoor activities. Pack accordingly for 9 potential rain days. February offers a similar profile at lower hotel rates if dates are flexible. The main practical note: Lisbon's popular sites are busiest between 10am and 3pm regardless of season. Arriving at opening time or after 4pm makes a significant difference to the experience. Planning tips: most accommodation categories have availability, and last-minute deals are common. The quieter streets and shorter queues can make this a genuinely enjoyable time to visit for the right type of traveller. Budget-conscious visitors will find the best value of the year in this period.
Based on 30-year climate normals (1991 to 2020), January in Lisbon averages 14°C by day and 9°C overnight, a range that places it in the temperate middle ground of the year. The month records approximately 8 sunshine hours per day and 69mm of total rainfall across 9 wet days, giving it a sunshine-to-rain ratio that is broadly workable for most itineraries.
14°C
57°F
Avg High
9°C
48°F
Avg Low
9 days
69 mm total
Rain Days
8h
per day avg
Sunshine
65%
Moderate
Humidity
The narrow 5°C gap between daytime and overnight temperatures, characteristic of coastal cities with maritime moderation, means a single mid-layer works across the whole day. Humidity averages 65%, which is comfortable for most visitors. On warmer days, lighter fabrics help with the mild stickiness in the afternoon. The UV index of 1 is low, meaning sun exposure is minimal concern and sunscreen is largely optional. Wind averages 22 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 57°F average high, 48°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Packing for Lisbon in January means dressing for 14°C days and 9°C evenings. A mid-weight jacket over a sweater handles 14°C daytime temperatures; the combination stays comfortable all day without overheating. Evening temperatures settle at 9°C, a modest 5°C drop that a light cardigan or denim jacket covers. European cobblestones reward low-profile walking shoes over flip-flops or heels, with cushioned trainers or leather walking shoes being the practical choice. A compact foldable umbrella weighs almost nothing and earns its keep across 9 potential rainy days.
Local tip: Many of Lisbon's museums and galleries maintain cool interior temperatures regardless of outdoor conditions. A compact layer in your daypack lets you move between warm streets and chilled exhibition halls without discomfort.
January has no major festivals or public holidays in Lisbon, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.
Based on 14°C average highs and 9 rainy days
In January, the Azores High weakens and retreats southward, allowing Atlantic storm tracks to cross the Mediterranean and bring the city its seasonal rainfall. Temperatures average 14°C during the day and drop to 9°C at night as cold continental air occasionally pushes in from the north. This is the rainy season that keeps the region's landscape green through spring. Climate data: Open-Meteo ERA5 (1991–2020).
Sunshine Hours
The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.
UV Index
A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate, wear sunscreen. UV 6-7: High, hat and SPF 30+ essential. UV 8-10: Very High, limit midday exposure. UV 11+: Extreme, seek shade between 10am-4pm.
Rain Days
A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.
Humidity
Relative humidity as a percentage. Below 40%: Dry, skin and throat may feel parched. 40-60%: Comfortable, ideal for most people. 60-80%: Sticky, light breathable fabrics recommended. Above 80%: Muggy, heat feels more intense; quick-dry clothing is essential.
Lisbon in January
January ranks 10th sunniest of the year in Lisbon, with an average 8 daily sunshine hours. The driest months are July, August, and June. August is the hottest month (27°C avg high); January is the coolest (14°C). From here, temperatures fall 0°C into February. Compared to last month (December: 14°C high, 9 rain days), January is similarly warm and equally dry. January is one of the least sunny months, but that often means lower prices and fewer fellow tourists.
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 14°C | 9°C | 9 | 8h | View |
| February | 14°C | 9°C | 8 | 9h | View |
| March | 17°C | 11°C | 8 | 10h | View |
| April | 18°C | 12°C | 8 | 12h | View |
| May | 21°C | 14°C | 6 | 12h | View |
| June | 24°C | 17°C | 2 | 14h | View |
| July | 26°C | 18°C | 1 | 14h | View |
| August | 27°C | 19°C | 1 | 13h | View |
| September | 25°C | 18°C | 4 | 11h | View |
| October | 21°C | 16°C | 9 | 9h | View |
| November | 17°C | 12°C | 10 | 8h | View |
| December | 14°C | 10°C | 9 | 7h | View |
January
9 rain days, 8h sun
February
8 rain days, 9h sun
March
8 rain days, 10h sun
April
8 rain days, 12h sun
May
6 rain days, 12h sun
June
2 rain days, 14h sun
July
1 rain days, 14h sun
August
1 rain days, 13h sun
September
4 rain days, 11h sun
October
9 rain days, 9h sun
November
10 rain days, 8h sun
December
9 rain days, 7h sun
Cities within 500 km with comparable weather conditions
Data Sources for Lisbon
Climate normals represent 30-year averages (1991-2020). Individual years may vary.