The wet weather that has plagued the country these past few weeks wreaked havoc during Saturday's qualifying at Silverstone, causing a 92-minute delay midway through the second session.
By that stage Button was a bystander after failing to make it out of Q1 as not for the first time in his tortuous recent run of six points in the past five races he struggled with tyres.
Button qualified 18th, although with penalties to be applied for Toro Rosso's Jean-Eric Vergne and Sauber's Kamui Kobayashi, the likelihood is the McLaren star will start 16th.
If rain does hit the circuit again then reigning champion Vettel, who starts from fourth, admits the race will be a lottery.
"If we have the same weather tomorrow it doesn't matter if you are P2, P4, P6 or P8," said Vettel.
"We will have to stop the race, get the red flag out and see what makes sense.
"If it's damp, slightly wet, there is always more risk, a bit more of a lottery that things can happen at any time in the race.
"It becomes important to simply stay on the track, have clean pit stops, to be on the right tyre at the right time.
"But anything is possible. Look at the race last year when one section was full of water, and yet at the back end of the track it was completely dry.
"It could be pretty messy tomorrow [Sunday]. Someone starting P18, Jenson, could win tomorrow [Sunday]. We'll see what happens."