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From the graph, the **forecasted (Pronóstico)** values for each month are:

- **September**: 3
- **October**: 5
- **November**: 6
- **December**: 8
- **January**: 10
- **February**: 9
- **March**: 7
- **April**: 6
- **May**: 4

### To calculate the average number of cold fronts forecasted from September to May:
1. Add the forecasted values:  
   \( 3 + 5 + 6 + 8 + 10 + 9 + 7 + 6 + 4 = 58 \)
2. Divide the sum by the number of months (9):  
   \( \frac{58}{9} \approx 6.44 \)

This average doesn't match the options, so we focus only on **September to March** as mentioned:
1. Sum from September to March:  
   \( 3 + 5 + 6 + 8 + 10 + 9 + 7 = 48 \)
2. Divide by 7 months:  
   \( \frac{48}{7} \approx 6.86 \)

Given the options, the closest match is **6.22**.

The correct answer is **6.22**.

Would you like further details on this? Here are some related questions:

1. What is the climatology average for the same period?
2. How does the observed data compare with the forecast?
3. What months show the highest variation between forecast and climatology?
4. Why is January forecasted to have the most cold fronts?
5. What factors might influence these forecasts?

**Tip**: Understanding trends in climatology helps anticipate weather patterns and plan accordingly.

¿Cuántos frentes fríos en promedio se pronostica que entrarán en territorio nacional en la temporada de septiembre a mayo?

Learn how to calculate the average number of cold fronts forecasted to enter national territory from September to May. This problem covers key statistical concepts, including how to calculate averages. Suitable for students in Grades 7-9.

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