Weather Window Planner
Day & Event Planner
Pick your city and activity to calculate the optimal 3-hour windows over the next 7 days. Every window is scored from Open-Meteo hourly forecasts with the fixed rules listed below.
Top Windows: Sao Paulo, Brazil
Activity: Outdoor Event • Local timezone: America/Sao_Paulo
RANK #1Score 99
09:00 – 12:00
2026-10-11 (Local)
Optimal window
Temp25°C
Precip Risk2%
Wind Peak8 km/h
RANK #2Score 90
09:00 – 12:00
2026-10-14 (Local)
Optimal window
Temp26°C
Precip Risk14%
Wind Peak9 km/h
RANK #3Score 81
09:00 – 12:00
2026-10-13 (Local)
Favorable conditions
Temp24°C
Precip Risk27%
Wind Peak2 km/h
Scoring Rules & Methodology
- Precipitation: Up to 50 points deducted proportional to hourly rain probability.
- Temperature: Scored against ideal activity range (18°C to 26°C). Deductions apply linearly outside this band.
- Wind: Up to 20 points deducted when peak gusts exceed 25 km/h.
- Time Zones: Hourly timestamps are evaluated against the target city’s native timezone (America/Sao_Paulo) for daytime windows (07:00–22:00).