import re
testString = "Friday: Thundery Shower, Maximum Temperature: 27°C (81°F) Minimum Temperature: 17°C (63°F)"
t = re.search(r"([^:]+):\s*([^,]+)", testString)
degF = re.findall(r"(\d+°F)\)", testString)

print (t)             # _sre.SRE_Match object
print (t.group(1))    # Friday
print (t.group(2))    # Thundery Shower
print (degF)          # => ['81\xc2\xb0F', '63\xc2\xb0F']
print len('°')        # => 2