Measured, not vibes
Best Time to Visit Lisbon
By measured weather comfort, the top months for Lisbon are May, June, September — and RouteVerdict's editorial pick, which also weighs crowds and prices, is April, May, June, September, October. The table below is computed from ERA5 reanalysis data for 2020–2024, measured at Lisbon (68 m elevation).
Month by month
Lisbon weather and comfort, 2020–2024
| Month | Avg high | Wet days | Comfort | Season |
|---|---|---|---|---|
| January | 14.9°C / 59°F | 5.8 | 59 | |
| February | 16.9°C / 62°F | 6.2 | 70 | |
| March | 17.9°C / 64°F | 7.7 | 72 | |
| April | 20.1°C / 68°F | 7.3 | 81 | |
| May | 23.4°C / 74°F | 3 | 94 | Best |
| June | 24.9°C / 77°F | 4.5 | 89 | Best |
| July | 29°C / 84°F | 0.3 | 80 | Shoulder |
| August | 28.5°C / 83°F | 0.3 | 83 | Shoulder |
| September | 25.8°C / 78°F | 5.5 | 85 | Best |
| October | 23.2°C / 74°F | 8.7 | 83 | |
| November | 18.6°C / 65°F | 7.8 | 75 | |
| December | 16°C / 61°F | 7.5 | 63 |
Comfort is RouteVerdict's 0–100 score: 100·exp(−(high−23)²/162) × (1 − min(0.35, wet days × 0.02)). The full method is on the methodology page. Weather data by Open-Meteo.com (ERA5, CC BY 4.0), 2020–2024 normals. Wet day = ≥1 mm precipitation.
What the seasons are actually like
Traveling to Lisbon month by month
Lisbon's comfort score peaks in May at 93.9, with an average high of 23.4°C and just 3 wet days, followed by June's 89 and September's 84.8. July and August are the driest months of all, at 0.3 wet days each, but comfort dips slightly to 79.6 and 82.5 as the heat builds — both are RouteVerdict's shoulder months rather than editorial picks. Winter (December–February) sees highs of 14.9–16.9°C and comfort scores of 59–69.6, mild by northern European standards. RouteVerdict's editorial pick spans April through June and September through October, framing the two comfort peaks around the drier midsummer months.
FAQ
Lisbon timing questions
What is the best month to visit Lisbon?
By measured weather comfort (ERA5 2020–2024), the top months are May, June, and September, with May scoring highest. RouteVerdict's editorial pick is April, May, June, September, and October, which also weighs crowds, prices, and events.
What is the hottest month in Lisbon?
July, with an average daily high of 29°C (84°F).
What is the rainiest month in Lisbon?
October, averaging 8.7 days with at least 1 mm of precipitation.
When is shoulder season in Lisbon?
August and July — the best-scoring months outside both the measured top three and RouteVerdict's editorial peak-season pick.
Why aren't July and August in Lisbon's editorial best months if they're the driest?
July and August are Lisbon's driest months at 0.3 wet days each, but comfort dips to 79.6 and 82.5 as the heat builds — below the May and June peaks of 93.9 and 89.
What is Lisbon's single best month for weather?
May, with an average high of 23.4°C, only 3 wet days, and a comfort score of 93.9 — the highest measured for any month.