Does Hustle Affect Moves that Bypass Accuracy

The Power of an attack directly correlates to how much damage you deal, because its presence in the damage formula is entirely multiplicative. So, an attack with 120 power will do twice as much damage as one that has 60 power. The same goes with your corresponding attack stat: a Pokemon with 100 Attack will do twice as much damage as one with 50 Attack when using the same attack on the same target.

STAB has operated consistently since Gen 1 so this applies to all of the games. It increases the Power of an attack by 50% if it matches one of your types. 60 becomes 90, for instance.

Technician increases the Base Power of an attack by 50% if its Power is 60 or less. So the most you get is boosting an attack at 60 power to 90. This occurs before STAB is calculated, so your Power would be 90 for STAB, boosting it to 135.

It's looking a bit difficult to get a straight answer here, even when comparing to the similar-mechanic moves Blizzard and Thunder.

Bulbapedia says that those three moves cannot miss when used in the correct weather, while Psypoke agrees for Blizzard and Thunder - though it says Hurricane has just 100% accuracy. Serebii gives 100% accuracy to Hurricane and Thunder and ignores Blizzard's weather-based accuracy outright, while Veekun gives 100% accuracy to all three moves.

The interesting bit is Smogon. Its moveslist gives the three moves 100% accuracy in the correct weather. However, there are two catches:

1. In its Gen IV sections, it gives the weather-enhanced accuracy of Blizzard and Thunder as "cannot miss".
2. From http://www.smogon.com/forums/showthread.php?t=79340:

   Hurricane has its accuracy boosted to 100% in rain and reduced to 50% in Sun; its accuracy remains 70% in all other weather. Its accuracy in rain is Swift=like, bypassing accuracy drops and evasion boosts.

One of the posts in that topic explains: "My Vaporeon with Wind Storm [Japanese version of Hurricane] didn't miss after 16 tries with a -6 Stage Accuracy during Rain."

At -6 accuracy, a 100% move is running at 33%, so the odds of hitting 16/16 times are 1 in 43,046,721. So, taking that research thread at face value - and they've the people that decoded the damage formula if I'm not mistaken - then I have to conclude that, like Blizzard in hail and Thunder in rain, Hurricane has infinite accuracy in rain.

Footnote: I remember seeing somewhere during this research that Gen V represents cannot-miss moves with an accuracy of "101%". If you're using an extraction tool that assumes 100% is the maximum (which I would guess some of these sites do), you might get an invalid answer.