Narrative:

During the [scenic] tour I exceeded the fight envelope temperature operating limitations of section of the flight manual. I was bound by two different limitations; the ZZZ location with 40.36 degree celsius and ZZZ1 location with 45.74 degree celsius.when I arrived for my flight and started prepping for it I was immediately made aware through the daily briefing sheet that the forecasted maximum temperatures will be 40C at ZZZ and 46C at ZZZ1. I knew I will have to constantly pay attention to the actual temperatures for the day.when I took off from ZZZ1 the temperature was reporting 44C (43.9C actual metar resolution). Landing at ZZZ the reporting temperature was 38C. At ZZZ the company operations were already shut down but air only tours were still going on since temperature allowed for it. My customers went on to do their tour while I waited approximately 50 minutes. During that time I was paying attention to the temperature at ZZZ which was holding at 39C so I was comfortable taking off at this point. I did briefly look at ZZZ1 which was at 45C. When I got into the aircraft before turning on the engine I listened to the conditions at ZZZ one last time before I committed to the flight and it was still holding at 39C.this is where my planning was not completed. I should have asked base at ZZZ to confirm for me the ZZZ1 conditions at that instant since my metar ZZZ1 information was approaching over 20-30 minutes old (45C). In hindsight which I did not confirm at the time they were still below my operating limitations at 45.6C when I was taking off from ZZZ for ZZZ1. If I did confirm this for ZZZ1 before departing ZZZ I would have known that the temperature was trending up and there is a good possibility that temperature would be 46C. The temperature did reach 46C (46.1C) and operations at ZZZ1 were suspended when I came to ZZZ1.my OAT sensor was still indicating below my limitations but upon coming in for a landing at [the] ramp the temperature did climb past 46C.I did not experience any rush or pressure to complete the flight. The cause was my planning and was not seen all the way through since I developed comfort that I will be ok to complete the flight by knowing the immediate temperature for the takeoff and not doing the same for landing (that information was about 20-30 minutes old for me at the time of takeoff at ZZZ).

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Original NASA ASRS Text

Title: Helicopter pilot reported an encounter with extreme atmospheric heat conditions.

Narrative: During the [Scenic] Tour I exceeded the fight Envelope Temperature operating limitations of section of the Flight Manual. I was bound by two different limitations; the ZZZ location with 40.36 degree Celsius and ZZZ1 location with 45.74 degree Celsius.When I arrived for my flight and started prepping for it I was immediately made aware through the Daily Briefing Sheet that the forecasted MAX temperatures will be 40C at ZZZ and 46C at ZZZ1. I knew I will have to constantly pay attention to the actual temperatures for the day.When I took off from ZZZ1 the temperature was reporting 44C (43.9C actual METAR resolution). Landing at ZZZ the reporting temperature was 38C. At ZZZ the company operations were already shut down but air only tours were still going on since temperature allowed for it. My customers went on to do their tour while I waited approximately 50 minutes. During that time I was paying attention to the temperature at ZZZ which was holding at 39C so I was comfortable taking off at this point. I did briefly look at ZZZ1 which was at 45C. When I got into the aircraft before turning on the engine I listened to the conditions at ZZZ one last time before I committed to the flight and it was still holding at 39C.This is where my planning was not completed. I should have asked base at ZZZ to confirm for me the ZZZ1 conditions at that instant since my METAR ZZZ1 information was approaching over 20-30 minutes old (45C). In hindsight which I did not confirm at the time they were still below my operating limitations at 45.6C when I was taking off from ZZZ for ZZZ1. If I did confirm this for ZZZ1 before departing ZZZ I would have known that the temperature was trending up and there is a good possibility that temperature would be 46C. The temperature did reach 46C (46.1C) and operations at ZZZ1 were suspended when I came to ZZZ1.My OAT sensor was still indicating below my limitations but upon coming in for a landing at [the] Ramp the temperature did climb past 46C.I did not experience any rush or pressure to complete the flight. The cause was my planning and was not seen all the way through since I developed comfort that I will be OK to complete the flight by knowing the immediate temperature for the takeoff and not doing the same for landing (that information was about 20-30 minutes old for me at the time of takeoff at ZZZ).

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.