Temperature
Pleasant by day, mild at night.
75°Ftypical December high
Typical range
December climate
December in Arenal Volcano
Costa Rica · Central America
Mild days.
Some tradeoffs
Late
Daytime high
75°F
Lows around 64°F
Rain
Rain most days
Sun
Not available
Air feel
Humid
When to visit
Month-by-month fit
Best
Precipitation
It rains on most days, and rain often persists for longer stretches. About 22 wet days, fewer than in most months.
71%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
Humid air and frequent rain shape this month.
61%December Heat feel
Easy airWarm airHumid air
Hourly temperature pattern
In December, afternoons feel about 74° and nights feel near 67°.
ComfortableWarmNight hours
Clear sky
Mostly cloudy skies this month.
28%December Clear sky
Clear skyCloud
Wind pattern
Calm winds are typical in December.
7 mphDecember Light breeze
More detailIncludes daypart comfort
Typical December day
December late afternoons are around 71°F, easing to about 68°F in early evening.
Avg temp Typical range
Morning71°F
Rain61%
Cloud69%
Humid airHigh
Sun intensityModerate
Midday74°F
Rain58%
Cloud61%
Humid airHigh
Sun intensityStrong
Late afternoon71°F
Rain45%
Cloud58%
Humid airHigh
Sun intensityLow
Early evening68°F
Feels 70°F
Rain36%
Cloud70%
Humid airHigh
Sun intensityMinimal
Best windowData tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 74 | 63 | 4.5 | 16 | — | 87 |
| Feb | 76 | 63 | 2.1 | 9 | — | 83 |
| Mar | 78 | 64 | 1.2 | 7 | — | 80 |
| Apr | 80 | 65 | 2.1 | 10 | — | 80 |
| May | 80 | 67 | 9.9 | 24 | — | 86 |
| Jun | 78 | 67 | 12.6 | 29 | — | 90 |
| Jul | 77 | 67 | 10.4 | 28 | — | 90 |
| Aug | 78 | 67 | 9.9 | 28 | — | 90 |
| Sep | 79 | 66 | 11.3 | 29 | — | 90 |
| Oct | 77 | 66 | 12.8 | 30 | — | 91 |
| Nov | 76 | 65 | 11.8 | 26 | — | 90 |
| Dec | 75 | 64 | 7.8 | 22 | — | 88 |
Similar climates
Similar
Similar travel styleMonteverdeCosta RicaSimilar travel stylePerez ZeledonCosta RicaSimilar travel styleVang ViengLaosSimilar travel styleDominicaDominica
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.
Sunshine: temporarily unavailable while its source is reviewed.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology