Study suggests weather can have impact on elections

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Believe it or not, there are things The Weather Authority tracks that can have an impact in voter turnout.

A 2007 study published in The Journal of Politics examined the impact weather has had on voter turnout for presidential elections from 1948 to 2000.  The authors of the paper state, “we find the linkage (to the weather-turnout hypothesis) not only to be statistically significant, but sometimes meaningful as well.”

The findings suggest election day rain reduces voter turnout in a county by 0.9% per inch above the daily normal amount.  Not surprisingly, snow has a negative impact on voter turnout.  For every inch of snow that falls, above the specific day’s normal amount, voter turnout drops 0.5% in a county.

The paper cites the 1960 and 2000 presidential elections as key examples.  Both elections ended in narrow margins, making several states pivotal Electoral College.

As an example, the 1960 presidential election was close in popular vote.  Only 119,450 votes (0.1%) separated Kennedy and Nixon.  Kennedy won the popular vote in Illinois by 8,858 votes.  There were allegations of voter fraud in Illinois during the election.  The weather was also relatively decent that day.  High temperatures were in the middle/upper 40°s across the state and light rain was recorded over the northern third.

If there had been more rain, deterring people from putting their vote in the ballot box, national results might have been impacted.  When the authors ran a simulation, taking the maximum rainfall for that election day in recorded history,  the results of the presidential election would have been different. Richard Nixon would have received an additional 106 electoral votes, thus winning the 1960 presidential election and becoming the President of the United States eight years earlier than his eventual election in 1968.

Voting line in Fishers on Nov. 8, 2016

The authors also look at the opposite side.  What if there were dry conditions around the country on election day.  They found that it would have impacted the Electoral College in 1992 with Bill Clinton winning North Carolina and again in 2000 with Al Gore winning Florida, resulting in Al Gore winning the presidential election.  However, when they considered a wet 2000 election day, George W. Bush would have won by a wider margin.


It does look like there will be rain to contend with Tuesday (election day).  A 30-computer model average suggests 0.39″ of rain falling Monday through Tuesday evening in Indianapolis.

The normal rainfall for Indianapolis on November 6 is 0.13″ and a trace for snow.  Assuming the previously mentioned findings work for mid-term elections, since central Indiana should receive less than the normal amount of precipitation for the day weather should not have an impact on voter turnout.

Computer model projection of radar and satellite imagery Monday through Tuesday.

Computer models suggest periods of heavy rain, with an occasional thunderstorm, possible late Monday night through pre-dawn hours Tuesday.  Showers will remain possible late Tuesday morning.  Skies may brighten later Tuesday afternoon but winds are projected to be brisk with gusts above 20 mph.


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