Rainbow forecast for Victoria Falls

Checking about 40 forecast ensemble members for sunlit rain near Victoria Falls…

Rainbow weather in Victoria Falls

Victoria Falls has a shortcut the rest of the world lacks: the falls make their own rain. On any sunny day, spray rainbows obey the sun rather than the weather, appearing whenever the geometry lines up: sun behind you, mist in front, sun lower than 42 degrees. Weather-made bows happen here too, on shower days.

At 17.9° south, Victoria Falls's midday sun often climbs above the geometry for a visible primary bow. Early morning and late afternoon are the most dependable viewing windows through much of the year.

Wherever you are, the geometry is the same: a primary rainbow forms opposite the sun while the sun is less than about 42 degrees above the horizon. Bowcast's research-informed heuristics give extra weight to clearing showers. The gauge above applies them to ensemble forecasts to predict the rainbow chance for the 12 km around Victoria Falls.

The rainbow window through the year

Rainbow questions, answered

When do rainbows appear in Victoria Falls?

Rainbows need sunlit rain with the sun lower than about 42 degrees, so in Victoria Falls useful windows often occur after sunrise or before sunset on showery days. A study in ZhaoSu, China found that about nine in ten observed rainbows occurred during the hour after rainfall. Bowcast uses that regional finding as research guidance, not a universal rate.

Where should I look for a rainbow in Victoria Falls?

Always directly opposite the sun: put the sun at your back and look toward the retreating rain. In the evening that means looking east; in the morning, west.

What is today's rainbow forecast in Victoria Falls?

Bowcast checks sunlit-rain ingredients around Victoria Falls, hour by hour, for the next 7 days. When ensemble guidance is available, it shows an Estimated chance from about 40 model members, not a probability calibrated against observed rainbow frequencies. When ensemble guidance is unavailable, it shows a Conditions score /100 instead. This page shows the strongest actionable interval; the Now board shows the interval containing the current time.

Can you predict a rainbow in Victoria Falls?

Not with certainty, but you can forecast the odds. Bowcast works as a rainbow predictor for Victoria Falls: it reads about 40 ensemble weather members for sunlit rain, checks that the sun sits lower than 42 degrees, and works out which way to face. Read it as an informed estimate of the chance, not a promise that a bow will appear.

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