How many subscribers are in the zip code of 94301 and what is the hottest temperature recorded on that zip code?
hottest temperature refers to MAX(max_temperature_f);
SELECT COUNT(T3.zip_code), T3.max_temperature_f FROM trip AS T2 INNER JOIN weather AS T3 ON T3.zip_code = T2.zip_code WHERE T3.zip_code = 94301 AND T2.subscription_type = 'Subscriber' ORDER BY T3.max_temperature_f DESC LIMIT 1