Outdoor Activity Index
Weather index for activity planning
What is the Outdoor Activity Index?
The Outdoor Activity Index provides a comprehensive assessment of ideal weather conditions for a wide range of outdoor activities, including hiking, picnics, recreational sports, and outdoor events. This index combines multiple critical meteorological factors - air temperature, precipitation, wind speed, and UV index - to determine whether conditions are safe, comfortable, and pleasant for spending time outdoors. High values indicate perfect conditions with mild temperatures, clear or partly cloudy skies, light winds, and adequate protection from UV radiation, while low values suggest adverse conditions that may make outdoor activities uncomfortable or even dangerous.
How is the Outdoor Activity Index calculated?
- Air temperature: Temperatures between 15-25°C (59-77°F) provide optimal conditions, while extremes below 5°C (41°F) or above 35°C (95°F) significantly reduce the index due to discomfort and safety concerns.
- Precipitation: Rain or snow reduces the index as it makes outdoor activities uncomfortable and potentially dangerous. Dry conditions score highest.
- Wind speed: Light winds (up to 15 km/h or 9 mph) are ideal and increase the index. Strong winds above 30 km/h (18 mph) significantly reduce the index, making activities uncomfortable and potentially dangerous.
- UV index: Low UV values (0-3) are ideal and increase the index. High UV values (8+) reduce the index due to increased risk of sunburn and skin damage, requiring extra protection.
Understanding the Outdoor Activity Index Scale (0-10)
0-2
Very Poor - Stay indoors
3-4
Poor - Challenging conditions
5-6
Fair - Acceptable
7-8
Good - Pleasant conditions
9-10
Excellent - Perfect for outdoors
Outdoor Activity Index: Top Cities Comparison
Compare Outdoor Activity Index values for the most popular cities ranked by search volume
| City | Country | Today | Tomorrow | Change |
|---|---|---|---|---|
| Tokyo | Japan | 7 / 10 Good | 3 / 10 Poor | -4 |
| Osaka | Japan | 8 / 10 Excellent | 6 / 10 Good | -2 |
| Kyoto | Japan | 8 / 10 Excellent | 6 / 10 Good | -2 |
| London | United Kingdom | 6 / 10 Good | 7 / 10 Good | +1 |
| Rome | Italy | 8 / 10 Excellent | 7 / 10 Good | -1 |
| Paris | France | 5 / 10 Fair | 5 / 10 Fair | 0 |
| Delhi | India | 10 / 10 Excellent | 10 / 10 Excellent | 0 |
| Florence | Italy | 8 / 10 Excellent | 6 / 10 Good | -2 |
| New York City | United States | 5 / 10 Fair | 5 / 10 Fair | 0 |
| Hanoi | Vietnam | 10 / 10 Excellent | 9 / 10 Excellent | -1 |
Outdoor Activity Index: Tips & Recommendations
- Dress appropriately for temperature
- Bring water on hot days
- Use sunscreen when UV is high
- Plan activities for times with best conditions
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