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: Helsinki, Finland
Activity: Outdoor Event • Local timezone: Europe/Helsinki
RANK #1Score 80
18:00 – 21:00
2026-10-15 (Local)
Cooler than ideal
Temp12°C
Precip Risk2%
Wind Peak23 km/h
RANK #2Score 79
12:00 – 15:00
2026-10-15 (Local)
Cooler than ideal
Temp11°C
Precip Risk2%
Wind Peak17 km/h
RANK #3Score 79
15:00 – 18:00
2026-10-15 (Local)
Cooler than ideal
Temp11°C
Precip Risk1%
Wind Peak20 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 (Europe/Helsinki) for daytime windows (07:00–22:00).