The meteorological institute said Tuesday that the overnight low of 12.8 degrees C was the lowest in San José in 15 years.
That was not exactly life threatening for expats. The temperature converts to 55 degrees Fahrenheit. But the chill was accompanied by wind gusts up to 70 kph or about 43.5 mph.
Elsewhere in the country temperatures were lower at higher elevations. in the vicinity of the Irazú volcano, the mercury dipped to 2.8 C. or about 37 degrees F.
The winds appeared to have died down in the metro area by early today.
Readers in Florida reported 26-degree F overnight lows.
The instituto Meteorológico nacional blamed the chill on strong northerly winds. However, these winds did not drive away the rain. There was light rain in many parts of the country Tuesday.