Introduction to Meteorology - ATSC 2000 Seasons Controls on local temperature –Latitude –Altitude –Oceans vs continents –Humidity

147 million km, ~ 179 days 152 million km, ~ 186 days

FIGURE 3.20 Average air temperature near sea level in January (°F).

FIGURE 3.21 Average air temperature near sea level in July (°F).

FIGURE 3.26 Mean annual total heating degree-days across the United States (base 65°F).

Figure 7.2 Map of July-January surface air temperature differencesFig. 7.2 Map of July-January surface air temperature difference (C).