Sometime around the feast of Saint John the Baptist, in the soggy middle of Costa Rica’s rainy season, the clouds sometimes do something unexpected: they part. For a few golden days the downpours pause, the puddles dry, and Ticos look up and say, knowingly, “ah — el veranillo de San Juan.”
If you only know Costa Rica’s two official seasons — the dry season and the green (rainy) season — the veranillo is the country’s worst-kept secret: a brief stretch of sun that crashes the party in late June, right when nobody expects it. It isn’t on any calendar you can buy a ticket for, and some years it barely shows up at all. But for travelers, farmers, and anyone tired of wringing out their socks, it’s one of the more charming quirks of the tropical year.
What is the veranillo de San Juan?
“Veranillo” translates roughly to “little summer” — verano is summer, and the diminutive -illo shrinks it down to a cute, temporary version. The name captures it perfectly: a small summer that drops into the heart of the wet season for a handful of days and then disappears again.
Meteorologically, the veranillo de San Juan is a short, relative pause in the rains during the rainy season — not a true dry spell. Rain doesn’t stop entirely; it eases. Showers become lighter and less frequent, mornings stay clear longer, and humidity drops just enough to notice. It usually lands in the days around June 24, the date Costa Rica’s deeply Catholic calendar marks as the feast of San Juan Bautista, which is how it earned the saint’s name.
It tends to be felt most in the country’s drier-leaning regions: the northern Pacific (Guanacaste) and the Central Valley around San José. It typically lasts from about three to five days, though its strength and even its appearance vary from one year to the next. Some years it’s pronounced and welcome; some years it’s so faint that meteorologists declare it a no-show.
The ScienceWhy does it happen?
The honest answer is that it’s driven by large-scale atmospheric patterns over Central America, and it isn’t perfectly predictable. During the rainy season, much of Costa Rica’s rain is fed by the Intertropical Convergence Zone — a belt of converging trade winds and rising, moisture-heavy air that migrates north and south through the year. When that convergence zone temporarily weakens, drifts, or pulls away from the country, and the trade winds firm up, the rain machine briefly loses steam. The result is a window of sunnier, more stable weather in the middle of an otherwise wet stretch.
Because it depends on the timing of those shifting wind and pressure patterns, the veranillo arrives on its own schedule. In some years the atmosphere stays humid and unstable right through late June and the little summer simply never forms. In others — particularly some El Niño years — the pause can be stronger and longer than usual. It’s a tendency in the climate, not a guarantee on the calendar.
The veranillo is a Pacific-and-Central-Valley phenomenon. The Caribbean coast runs on a completely different rain rhythm — its wettest and driest windows fall at other times of year — so don’t expect the same sunny pause in Puerto Viejo or Tortuguero just because Guanacaste is basking.
Veranillo de San Juan vs. the canícula
Here’s where even locals trip up. Every July and August, people feel the rain ease again and call it “the veranillo.” Usually it isn’t — it’s the canícula, a separate, later, and generally stronger dry interlude. The two get blended together constantly, but they’re distinct events.
| Veranillo de San Juan | Canícula | |
|---|---|---|
| When | Around June 24 (St. John’s Day) | Roughly mid-July into August |
| How long | A few days (about 3–5) | Often a couple of weeks or more |
| Intensity | A gentle, brief pause in rain | Drier and hotter; more pronounced |
| Where | Northern Pacific & Central Valley | Pacific north & central, Central Valley |
| The name | From the feast of San Juan Bautista | From Latin canicula, “little dog” — the Dog Star, Sirius, and the “dog days” of summer |
The simplest rule of thumb: if it’s the end of June, it’s probably the veranillo. If it’s the back half of July or into August, it’s the canícula. And in unusual years — like strong El Niño seasons — the two can blur together into one long, dry middle to the rainy season.
The FolkloreActually, there are three little summers
Costa Rican weather folklore, documented decades ago in studies of the country’s traditional climate calendar, recognizes not one but three of these breaks woven through the rainy season. They line up neatly with saints’ days and the old agricultural year.
Veranillo de San Juan
The famous one: a brief, gentle pause near St. John’s Day.
Primera Canícula
The “first dog days” — a longer, drier stretch as July winds down.
Segunda Canícula
The “second dog days,” another run of dry, hot days in early August.
You’ll rarely hear a Tico rattle off all three by name — the veranillo de San Juan is the celebrity of the bunch — but they’re all part of the same idea: the rainy season is not one continuous downpour, but a wet stretch broken up by a few breaths of summer.
What the veranillo means for your trip
Late June through August falls squarely inside the green season — the half of the year most guidebooks warn you away from. But the green season is wildly underrated: landscapes are at their most lush, waterfalls thunder, wildlife is active, crowds thin out, and prices soften. The veranillo (and the canículas behind it) can hand you a stretch of genuinely lovely weather inside that window, at green-season rates.
Where to be if you want the sun
The little summer favors the same regions that are driest overall, so stack the odds in your favor:
- Guanacaste & the northern Pacific — the beaches around the Papagayo, Tamarindo, and Nicoya feel the pause most strongly.
- The Central Valley — San José, the coffee highlands, and the surrounding towns often get bright, breezy afternoons.
- The central Pacific — areas like Jacó and Manuel Antonio can catch the edge of it, though less reliably than the northwest.
How rainy season actually behaves
Even outside the veranillo, green-season rain is rarely the all-day grey curtain newcomers imagine. The classic pattern is sunny, clear mornings followed by an afternoon or evening downpour that blows through and clears. Plan outdoor activities — beaches, hikes, canopy tours — for the morning, and you’ll often dodge the rain whether or not the veranillo shows up.
Because the veranillo isn’t guaranteed and can’t be precisely forecast far in advance, treat it as a delightful bonus, not a booking strategy. If you need dependable sun, the December–April dry season is your safer bet. If you’re traveling in late June or July anyway, pack for both and let the little summer surprise you.
What to pack for the season
San Juan, the saint behind the sunshine
The veranillo borrows its name from June 24, the feast day of San Juan Bautista (Saint John the Baptist), one of the most widely honored saints across Latin America. In a country with deep Catholic roots, saints’ days have long doubled as seasonal mile-markers — the calendar of fiestas patronales and the calendar of the weather grew up side by side, which is exactly why a meteorological pause ended up named for a saint.
Several Costa Rican towns carry San Juan in their names, and St. John’s Day sits among the many patron-saint celebrations that fill the country’s year with processions, music, food, and the gentle, bloodless toros a la tica. If you want to plan a visit around the rhythm of these celebrations, see our guide to Costa Rica’s year of holidays and festivals.
Frequently asked questions
When is the veranillo de San Juan in Costa Rica?
It typically occurs in the days around June 24, the feast of San Juan Bautista, and usually lasts about three to five days. The exact timing shifts each year, and in some years it doesn’t form at all.
Is the veranillo the same as the canícula?
No. The veranillo de San Juan is a short, gentle pause in the rains around late June. The canícula is a separate, later interlude — roughly mid-July into August — that tends to be longer, hotter, and more pronounced. People often confuse the two.
Does it stop raining completely during the veranillo?
Not usually. It’s a relative reduction in rainfall, not a true dry spell. Expect lighter, less frequent showers and more sun — not a guaranteed week without a drop.
Where in Costa Rica is the veranillo most noticeable?
It’s felt most in the northern Pacific (Guanacaste) and the Central Valley, with the central Pacific catching it less reliably. The Caribbean coast follows a different rainfall pattern and generally doesn’t experience it the same way.
Does the veranillo happen every year?
No. It’s a tendency in Costa Rica’s climate rather than a fixture. Some years the atmosphere stays humid and unstable through late June and the little summer never materializes; other years it’s strong and obvious.
Is late June a good time to visit Costa Rica?
It can be a great-value time. You’re in the green season — lush scenery, fewer crowds, lower prices — and if the veranillo appears, you get bonus sunshine. For dependable dry weather, though, the December-to-April dry season is the safer choice.
Rain or shine, the little summer is a reminder that in Costa Rica the weather, like everything else, runs on its own easy schedule. Pura vida. 🌿