The political verdict on President Barack Obama’s first five months in office has to be “so far, so good,” but it also must include trepidation about clouds on the horizon.

For sure, he’s popular. He’s laid out a breathtakingly bold agenda that he has good prospects of fulfilling. And his opposition is in dire political straits.

But too much shouldn’t be made of high approval ratings after five months. Obama’s Gallup rating on June 20, at 59 percent, is exactly the average of the last eight newly elected presidents.

And that average is dragged down by Bill Clinton’s dismal showing, 39 percent, in 1993 — the result of a self-created kerfuffle over gays in the military and of disarray in the White House.

Obama clearly continues to enjoy his honeymoon with voters, but history suggests that voters generally take a long time to become disenchanted with new presidents, when they do.

Jimmy Carter was at 63 percent after five months, stayed in the 60s until September 1977 and didn’t go into the 40s until February 1978. He left office with a 31 percent approval rating.

Ronald Reagan scored 59 percent in June 1981 and remained in the high 50s and low 60s until unemployment began to spike in November 1981 in the then-worst recession since the Great Depression. He went as low as 35 percent in January 1983, but was handily re-elected.

Reagan’s successor, George H.W. Bush, had a 69 percent approval rating in June 1989 and stayed in the high 50s, 60s, 70s — even 80s — into 1990, even before the first Gulf War in 1991, when it shot up to 91 percent. Then he lost the presidency in 1992.

Clinton had the shortest honeymoon of any recent president, falling from the 50s into the 40s by May 1993. He climbed out of his early hole, remaining in the low 50s and high 40s until his health care plan fell apart in September 1994. But he got re-elected, too.

And, despite the divisive circumstances of his election, George W. Bush had a 55 percent approval in June 2001 and stayed mostly in the 50s and 60s until his popularity soared after Sept. 11, 2001.

Regardless of history, Obama enjoys even higher ratings in some other polls than in Gallup’s — his Washington Post-ABC rating is 65 percent — and he’s the beneficiary of 2-to-1 favorable stories in the mainstream media, according to the Pew Research Center.

The biggest domestic threats to Obama’s success are ballooning debt and the possibility that, despite his stimulus package, an economic recovery will be delayed.

Almost all the polls show that the public’s main worry is about deficit spending. Only 46 percent in the Gallup Poll approve of his handling of the federal budget deficit, and only 45 percent think he is doing a good job controlling federal spending.

Indeed, Obama’s own Office of Management and Budget reported that gross federal debt — which more than doubled during George W. Bush’s administration — would nearly redouble by 2019 to more than 100 percent of gross domestic product, the highest level since World War II.

Politically, big deficit and debt numbers cause worry, but their potential economic effects are the main threats to Obama’s success.