Bilbao in September
In September, Bilbao averages 24°C (75°F) during the day and 15°C (60°F) at night, with around 11 days of rain (68 mm total).
High seasonConditions are comfortable for sightseeing without being sweltering. Plan for unsettled weather and bring rain gear.
September offers comfortable temperatures in Bilbao, with some rain to plan around.
How September compares to the rest of the year in Bilbao
September is one of the warmest months in Bilbao (3rd of 12) and one of the driest months (10th of 12). Daytime temperature runs 5°C above the annual average (19°C). September runs 1°C cooler than August (25°C) and cools 3°C in October (21°C).
September sunrise & sunset in Bilbao
Times shown for Bilbao local time (Europe/Madrid), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Bilbao — September
Golden-hour and blue-hour windows for the 15th of September, in Bilbao's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Bilbao in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (High season) and Bilbao's popularity.
Crowds & pricing — September in Bilbao
This is a busy month in Bilbao — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — September in Bilbao
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Bilbao in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 12°C / 54°F | 6°C / 43°F | 147 mm | 16 | — |
| February | 14°C / 57°F | 6°C / 43°F | 124 mm | 15 | — |
| March | 15°C / 59°F | 7°C / 45°F | 110 mm | 16 | — |
| April | 17°C / 63°F | 9°C / 48°F | 82 mm | 14 | — |
| May | 20°C / 67°F | 11°C / 53°F | 72 mm | 14 | — |
| June | 23°C / 73°F | 15°C / 59°F | 69 mm | 12 | — |
| July | 24°C / 76°F | 17°C / 62°F | 46 mm | 10 | — |
| August | 25°C / 77°F | 17°C / 63°F | 56 mm | 10 | — |
| September | 24°C / 75°F | 15°C / 60°F | 68 mm | 11 | — |
| October | 21°C / 70°F | 13°C / 56°F | 87 mm | 12 | — |
| November | 16°C / 61°F | 10°C / 49°F | 160 mm | 17 | — |
| December | 14°C / 57°F | 8°C / 46°F | 125 mm | 15 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Bilbao in September →
Frequently asked questions
How hot is Bilbao in September?
In September, Bilbao averages a high of 24°C (75°F) and a low of 15°C (60°F) — generally warm.
Does it rain a lot in Bilbao in September?
September can be fairly wet in Bilbao, with about 11 rainy days on average.
Is September a good time to visit Bilbao?
September is warm. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Bilbao in September?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full September packing list for Bilbao for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.