Bilbao
Spain · Europe
Year-round range: 45°F to 74°F
September
Excellent conditions this month
Your monthly fit score
Comfort fit by month.
Climate details▼
Temperature
Average highs and lows.
September has comfortable temperatures — not too hot, not too cold.
Shaded band = typical daily swing (P10 of night lows to P90 of afternoon peaks) — spans wider than avg high/low lines because it captures day-to-day variation.
| = SepRainfall
Monthly rain and rain days.
September has moderate rainfall — occasional showers but mostly manageable.
Sunshine
Average hours of bright sun per day.
September has decent sunshine — a mix of sun and cloud.
Clear sky
Clear-sky share is the inverse of average cloud cover (100% minus cloud cover). Band labels follow standard meteorological categories; distribution within each band varies by day.
Air comfort by month
Humidity and heat feel by month.
September is mostly comfortable — low heat and humidity pressure.
Time-of-day patterns
Typical hourly rhythm for September.
Temperature by hour
Temperature by hour and month
Typical temperature through the day across the year (1996-2025 normals, local time). Shaded cells are nighttime.
In September, afternoons reach about 72° and nights settle near 63°.
▶Full month-by-month data
| Month | High °F | Low °F | Rain days | Rain (in) | Sun h/day | Humidity |
|---|---|---|---|---|---|---|
| Jan | 54°F | 45°F | 17 | 5.1in | 3h | 77.85714285714285% |
| Feb | 55°F | 45°F | 13 | 4.2in | 3.7h | 76.85714285714286% |
| Mar | 58°F | 47°F | 14 | 3.8in | 4.2h | 74.71428571428571% |
| Apr | 60°F | 49°F | 13 | 3.7in | 4.8h | 76.71428571428571% |
| May | 64°F | 54°F | 12 | 3.0in | 5.3h | 79.14285714285714% |
| Jun | 69°F | 59°F | 11 | 2.5in | 5.7h | 81.28571428571429% |
| Jul | 73°F | 63°F | 8 | 2.1in | 6.5h | 80.85714285714286% |
| Aug | 74°F | 64°F | 9 | 2.1in | 6.3h | 79.14285714285714% |
| Sep | 71°F | 61°F | 10 | 3.0in | 5.2h | 77.99999999999999% |
| Oct | 67°F | 57°F | 12 | 4.3in | 4.3h | 76% |
| Nov | 59°F | 51°F | 16 | 6.7in | 3.3h | 77.14285714285714% |
| Dec | 56°F | 47°F | 14 | 4.9in | 3h | 77.14285714285714% |