As you can see, we have very different weather averages. From January to February the weather is usually about 30 to 40 degrees F. From March to May the weather is between 40 degrees and 70 degrees F. Then from June to August the weather is about 70 degrees to about 80 degrees F. Lastly, from September to December the weather average is about 60 degrees F to 30 degrees F. If you observe the graph above, you shall see the daily high(dark green), the average(red), the daily low(blue), and the US average(light green). We hope you pick a watm and sunny day to join us here at the Philadelphia Zoo.