Here is the weather for most of the relevant times, perfect conditions for an air display.
FC 22/08/2015 17:00-> TAF EGKA 221700Z NIL=
FC 22/08/2015 13:57-> TAF EGKA 221357Z 2215/2219 11010KT CAVOK
PROB30 TEMPO 2217/2219 12015G25KT=
FC 22/08/2015 11:00-> TAF EGKA 221100Z 2212/2219 12010KT CAVOK
PROB30 TEMPO 2217/2219 12015G25KT=
FC 22/08/2015 08:03-> TAF EGKA 220803Z 2209/2218 VRB03KT CAVOK
BECMG 2209/2212 12010KT=
FC 22/08/2015 08:01-> TAF EGKA 220801Z 2208/2215 VRB03KT CAVOK
BECMG 2209/2212 12010KT=
FC 22/08/2015 05:00-> TAF EGKA 220500Z NIL=
FC 22/08/2015 02:00-> TAF EGKA 220200Z NIL=
SA 22/08/2015 13:50-> METAR EGKA 221350Z 11010KT CAVOK 25/17 Q1012=
SA 22/08/2015 13:20-> METAR EGKA 221320Z 11010KT CAVOK 25/17 Q1013=
SA 22/08/2015 12:50-> METAR EGKA 221250Z 11011KT CAVOK 25/17 Q1013=
SA 22/08/2015 12:20-> METAR EGKA 221220Z 12012KT CAVOK 24/17 Q1013=
SA 22/08/2015 11:50-> METAR EGKA 221150Z 11011KT CAVOK 23/17 Q1014=
SA 22/08/2015 11:20-> METAR EGKA 221120Z 11011KT CAVOK 23/17 Q1014=
SA 22/08/2015 10:50-> METAR EGKA 221050Z 12010KT CAVOK 22/17 Q1014=
SA 22/08/2015 10:20-> METAR EGKA 221020Z 13008KT CAVOK 22/18 Q1014=
SA 22/08/2015 09:50-> METAR EGKA 220950Z 12010KT CAVOK 22/17 Q1014=
Unless some kind of freak, unrecorded weather phenomenon suddenly and momentarily occurred of sufficient magnitude to affect the performance of a jet fighter such as the T7, weather not a factor.