HELI EMS ENCOUNTERS IMC. ENTERS CTL ZONE WITHOUT CLRNC.

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ENRTE FROM XYZ TO ZZZ ON A VFR FLT PLAN THE WX STARTED TO DETERIORATE APPROX 10 MI E OF ABC. I TURNED BACK TO THE N AND MADE A DECISION TO PROCEED TO ABC ARPT FOR FUEL. I WAS UNABLE TO CONTACT ZZZ APCH AND DID NOT KNOW THE FREQ FOR DEF APCH AT ABC. WITH THE WX MARGINAL VFR IN THE CTL ZONE; I CHOSE TO ENTER THE CTL ZONE AFTER A CALL ON UNICOM WITHOUT CONTACTING DEF APCH FOR A SPECIAL VFR CLRNC. THE REASON FOR NOT LOOKING UP THE APCH FREQ FOR DEF APCH IS THAT I WAS SINGLE PLT IN DETERIORATING WX AND I DID NOT FEEL COMFORTABLE LOOKING UP THE FREQ AND FLYING AT THE SAME TIME. ALSO; WITH A PATIENT ON BOARD IT WAS IMPORTANT TO OBTAIN FUEL AS QUICKLY AS POSSIBLE SO THE FLT COULD BE COMPLETED IFR TO ZZZ. IN RETROSPECT; THE BEST COURSE OF ACTION WOULD HAVE BEEN TO REFUEL IN DEF AND CONDUCT THE FLT IFR TO ZZZ OR AT LEAST HAVE ENOUGH FUEL FOR THE IFR OPTION. THE WX IN ZZZ AND DEF HAD BEEN IMPROVING DURING THE PREVIOUS 2 HRS. THIS FACTOR AND THE FORECAST LED ME TO THE CONCLUSION THAT THE FLT COULD BE COMPLETED VFR. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES THAT THE DECISION TO LAND WAS THE MOST APPROPRIATE BUT NEEDED TO BE ACTED ON SOONER. WX RPTING OBTAINED 5 MIN PRIOR TO FLT DID NOT MATCH CONDITIONS.