No, you may not. You may only deduct rent for repairs if the landlord did not act reasonably--that is, if it unreasonably refused to repair or delayed repairs. "Reasonable" is judged as per the average or typical situation or case; they do not need to take cognizance of unusual special needs of an individual tenant, like a tropical bird that cannot stand even a few hours of colder temperatures. It is not unreasonable for a landlord to schedule repairs for next day to avoid a nighttime service premium; hence the landlord acted reasonably and discharged its obligations, and so you cannot deduct the costs you chose to incur.