Weather in Liberia in December

Costa Rica · 20-year averages, December

Prime time. If you get to pick your dates, December is the one. Highs average 30.1 °C, lows 22.8 °C, and rain falls on 3 days — nothing in the month is working against you.

December is the highest-scoring month of the twelve. The nearest rival is January, and the month at the other end of the year is May.

Rain falls on only 3 days, so an itinerary with no wet-weather fallback is a reasonable risk. Pack for 30.1 °C days and 22.8 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 15 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest December day reached 35 °C and the coldest night fell to 19.2 °C, and the wettest single day dropped 39 mm — roughly 229% of the month's rain in one day.

This is the volatile part. December rainfall has ranged from 3 mm to 86 mm across the twenty years measured — a 83 mm spread around an average of 17 mm. The average is real but almost no individual December looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind is light at 12.6 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 79%, high enough to notice on the warm days without dominating them.

How December sits in the year

Temperatures hold steady either side: 28.8 °C in November, 30.1 here, 32.1 in January. Nothing about the timing within the month matters much. Rain has already shifted: 12 days fewer than November had.

Daylight in December

Liberia sits close enough to the equator that daylight barely moves all year — 11.5 hours in December, against a range of just 1.2 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

An inland climate

Despite being inland, the year stays fairly even: 12.7 °C between the year's warmest afternoons and coldest nights.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

December in Liberia versus nearby

If Liberia is one option among several, the nearby comparison is worth making. Puntarenas is the weaker option in December — within a degree on temperature, 4 days more rain. San José is close enough to be a coin toss — 6.4 °C cooler, 11 days more rain.

So: December is the answer for Liberia. If it is booked out or priced out, January is the next best thing at 6 points behind, and May is the month to keep off the shortlist.

Every month in Liberia

MonthHigh °CLow °CRain daysRain mmHumidity %Daylight hScore
January32.122.8 146911.675
February33.823.1 036311.869
March35.223.7 145912.148
April35.524.8 6296012.448
May32.625.2 222227312.640
June29.824.6 252268312.750
July30.224.3 231658212.749
August30.424.4 232228112.549
September29.424.3 283178412.251
October28.524 273598711.952
November28.823.2 151638511.659
December30.122.8 3177911.581

See all twelve months in Liberia, or where else to go in December.

Planning the rest of the trip

Built and maintained by Amit Sharma, Auckland, New Zealand. I build these sites so the answer is free and the data is public.

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