Find out in which months the daily range of temperature is the highest and the lowest.
The daily range of temperature is calculated as the difference between the mean of daily maximum temperature and the mean of daily minimum temperature.
Based on the data provided for New Delhi (Safdarjung):
- January: Daily Range = 21.1°C – 7.3°C = 13.8°C
- May: Daily Range = 39.6°C – 25.9°C = 13.7°C
Between these two months, January has a higher daily range (13.8°C) compared to May (13.7°C). To find the highest and lowest daily range across all months, complete monthly data from the climatological table would be required.
Explanation
The textbook provides an example with data for New Delhi (Safdarjung) showing only January and May values. Students are expected to calculate the daily range by subtracting the Mean of Daily Min from the Mean of Daily Max for each month. The question is part of a project work where students should collect complete data from their local observatory to determine the highest and lowest daily range across all months.
Solution Steps
Step 1: Identify the formula: Daily Range = Mean of Daily Max – Mean of Daily Min
Step 2: Calculate for January: 21.1°C – 7.3°C = 13.8°C
Step 3: Calculate for May: 39.6°C – 25.9°C = 13.7°C
Step 4: Compare the values to determine higher and lower daily range.