Temperature
Warm by day, mild at night.
79°Ftypical Aug high
Typical range
Arenal Volcano
Costa Rica · Central America
Arenal Volcano is most comfortable in the drier months around February to April. Typical daytime highs run about 77-84°F year-round. The climate is warm and humid. Rainy season runs roughly August to October.
Best time to go
12 mo · Typical year
Temperature range
66°F to 84°F
Rain
20 days/mo
Humidity feel
Humid year-round
When to visit
Month-by-month fit
Precipitation
One of the wettest months.
94%wet-day frequency
AmountWet-day chance
Sunshine
Sunshine estimates are less reliable here; cloud and rain patterns are a better guide.
Heat & humidity by month
Very humid air dominates most hours this month.
98%Aug share of humid air hours
Easy airWarm airHumid air
Hourly comfort pattern
In August, afternoons feel about 79° and nights feel near 71°.
ComfortableWarmNight shading
More detailIncludes sky, daypart comfort, and wind
Cloud cover
Mostly cloudy skies.
9%Aug clear sky
ClearCloud cover
Typical August day
August late afternoons are around 73°F, easing to about 70°F in early evening.
Avg temp Typical range
Morning74°F
Feels 77°F
Rain59%
Cloud86%
Humid airVery high
Sun intensityModerate
Midday77°F
Feels 80°F
Rain82%
Cloud87%
Humid airVery high
Sun intensityStrong
Late afternoon73°F
Feels 77°F
Rain73%
Cloud92%
Humid airVery high
Sun intensityLow
Early evening70°F
Feels 75°F
Rain35%
Cloud93%
Humid airVery high
Sun intensityMinimal
Best windowWind pattern
Calm winds are typical in August.
4 mphAug Calm
Typical wind speed (mph)
Similar
Similar things to doMonteverdeCosta RicaSimilar things to doPerez ZeledonCosta RicaSimilar things to doVang ViengLaosSimilar things to doDominicaDominica
Want a side-by-side climate view? Compare Arenal Volcano with Monteverde.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology