Liberia climate — normals and trends
Liberia (Costa Rica) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 25.0 °C and it receives 1,818 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is April (27.0 °C on average) and the coldest is October (24.1 °C). Rainfall peaks in October.
Liberia averages 0 frost days, 145 hot days (≥ 30 °C) and 158 rainy days per year.
Liberia has warmed by +1.4 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The hottest day of the period reached 38.7 °C (on 22 April 1991) and the coldest 15.4 °C (on 28 December 1976).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
LiberiaGuanacaste Province
- coords
- 10.64°, -85.44°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.0°C
Average daily high
29.6°C
Average daily low
21.8°C
Annual rainfall
1,818mm
Sunshine / day
10.3h
Mean relative humidity
80%
Average peak wind
15.7km/h
Seasonal range
2.9°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
145 d/yr
Rainy days (≥ 1 mm)
158 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.3 °C
Average feels-like low
24.7 °C
Average peak gust
42.0 km/h
Tropical nights (≥ 20 °C)
349 d/yr
Solar radiation
19.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.60 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
38.7 °C
22 April 1991
Coldest day
15.4 °C
28 December 1976
Wettest day
263 mm
20 May 1956
Windiest day
45.5 km/h
5 February 2009
Strongest gust
105.5 km/h
5 February 2009
Hottest feels-like
43.1 °C
19 April 2010
Coldest feels-like
14.3 °C
20 January 1977
Sunniest day
12.5 h
12 June 1960
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 28.5 °C | -0.2 °C | 13 mm | +9 mm |
| Feb | 30.0 °C | +0.1 °C | 2 mm | -1 mm |
| Mar | 32.3 °C | +0.6 °C | 4 mm | -2 mm |
| Apr | 32.3 °C | -0.6 °C | 4 mm | -26 mm |
| May | 32.6 °C | +1.3 °C | 71 mm | -162 mm |
| Jun | 29.7 °C | +0.4 °C | 359 mm | +56 mm |
| Jul | 30.2 °C | +1.1 °C | 89 mm | -86 mm |
| Aug | 31.2 °C | +1.9 °C | 104 mm | -107 mm |
| Sep | 30.5 °C | +1.5 °C | 283 mm | -66 mm |
| Oct | 29.3 °C | +1.0 °C | 461 mm | +102 mm |
| Nov | 29.3 °C | +1.2 °C | 112 mm | -15 mm |
| Dec | 29.3 °C | +1.2 °C | 11 mm | -8 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Liberia?
Liberia has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 25.0 °C and it receives 1,818 mm of precipitation per year.
What is the hottest day ever recorded in Liberia?
The hottest day measured in Liberia between 1940 and 2025 was 22 April 1991, reaching 38.7 °C.
What is the coldest day in Liberia?
The coldest day measured in Liberia between 1940 and 2025 was 28 December 1976, at 15.4 °C.
Does it snow in Liberia?
Almost never: Liberia sees virtually no snow, with about 0 frost days per year.
Has the climate of Liberia warmed?
Yes: Liberia warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Liberia?
The wettest day measured in Liberia between 1940 and 2025 was 20 May 1956, with 263 mm of rain in 24 hours.
What was the windiest day in Liberia?
The windiest day measured in Liberia between 1940 and 2025 was 5 February 2009, with winds reaching 45.5 km/h.
What is the warmest month in Liberia?
The warmest month in Liberia is April (27.0 °C on average); the coldest is October (24.1 °C).
How much does it rain in Liberia?
Liberia receives on average 1,818 mm of precipitation per year, spread over about 158 rainy days.
Is it sunny in Liberia?
Liberia gets on average 10.3 hours of sunshine per day, roughly 3,760 hours per year over 1940-2025.
Are there tropical nights in Liberia?
Yes: Liberia has on average 349 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Liberia?
In Liberia, between 1940 and 2025, the highest apparent temperature reached 43.1 °C on 19 April 2010, and the lowest was 14.3 °C on 20 January 1977.
Compare Liberia with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Liberia