Imagine you took two readings with the digital psychrometer on a summer day at 8 am and at 2 pm, and repeated these readings later in the winter.

Day 1 (Summer)
8 am → Dry thermometer temperature: 66 ºF. Relative humidity: 68% Dewpoint: 59 ºF
2 pm → Dry thermometer temperature: 81 ºF. Relative humidity: 62% Dewpoint: 50 ºF

Day 2 (Winter)
8 am → Dry thermometer temperature: 30 ºF. Relative humidity: 44% Dewpoint: 18 ºF
2 pm → Dry thermometer temperature: 40 ºF. Relative humidity: 41% Dewpoint: 12 ºF





4.2.1 Why is relative humidity higher at 8 am in both days? (1 pt)


4.2.2 Using the data above, go to the table uploaded on Canvas and calculate the heat index or the wind chill, depending on the season for 2 pm in each day. (2 pts)
Day 1: 2 pm Heat Index: _____ ºF
Day 2: 2 pm Wind Chill: _____ ºF (Assume the wind speed is 10 mph)

4.2.3 Why were you not asked to calculate the heat index for day 2? (1 pt)