Osa climate

Osa Weather in December

NASA POWER reanalysis for the half-degree grid cell around Osa, 1991-2020; a grid cell is an area average and can differ from a thermometer in town by several degrees

Average highs run from -10°C on December 1 to -13°C on December 31, and lows from -16°C to -19°C. Normal precipitation for the month is 47 mm over about 12 wet days.

December day by day

The normal high and low for each date, in °C.

Normal daily high and low temperature at Osa, in °C, with the record for each date.-50-40-30-20-10010151015202530
  • Normal low
  • Normal high
  • Reanalysis extreme high
  • Reanalysis extreme low

December at a glance

Average high
-12°C
Average low
-18°C
Precipitation
47 mm
Reanalysis high
1°CDec 7, 2008
Reanalysis low
-46°CDec 16, 2009
Daylight
7 h 08 min to 6 h 45 min
Cloud cover
69%
Humidity
99%
Dew point
-15°C
Wind
13.3 km/h

Every day of the month

A wet day has at least 1 mm of precipitation in the reanalysis.

DateNormal highNormal lowReanalysis highReanalysis lowChance wet
Dec 1-10°C-16°C-2°C 1991-42°C 200245%
Dec 2-10°C-16°C-1°C 1999-36°C 201046%
Dec 3-10°C-16°C0°C 2009-33°C 200045%
Dec 4-10°C-16°C0°C 2009-30°C 200045%
Dec 5-10°C-16°C0°C 2008-36°C 200044%
Dec 6-10°C-16°C0°C 2008-36°C 200042%
Dec 7-10°C-16°C1°C 2008-30°C 200042%
Dec 8-10°C-16°C1°C 2008-36°C 200242%
Dec 9-11°C-16°C0°C 2006-45°C 200242%
Dec 10-11°C-16°C0°C 2006-39°C 200242%
Dec 11-11°C-16°C-1°C 2006-29°C 200944%
Dec 12-11°C-17°C0°C 2006-27°C 201242%
Dec 13-11°C-17°C-2°C 2014-33°C 201242%
Dec 14-11°C-17°C-4°C 2015-41°C 200941%
Dec 15-12°C-17°C-4°C 2003-45°C 200940%
Dec 16-12°C-18°C0°C 2006-46°C 200940%
Dec 17-12°C-18°C0°C 2006-40°C 200941%
Dec 18-12°C-18°C0°C 2006-32°C 200941%
Dec 19-12°C-18°C-2°C 1998-35°C 201641%
Dec 20-13°C-19°C-1°C 1998-37°C 201642%
Dec 21-13°C-19°C-3°C 2014-38°C 199743%
Dec 22-13°C-19°C0°C 2015-40°C 199742%
Dec 23-13°C-19°C0°C 2003-33°C 199543%
Dec 24-13°C-19°C-2°C 2003-36°C 199543%
Dec 25-13°C-19°C0°C 1995-34°C 200742%
Dec 26-13°C-19°C-4°C 1992-36°C 199640%
Dec 27-13°C-19°C-4°C 2004-38°C 199641%
Dec 28-13°C-19°C-1°C 2017-40°C 200243%
Dec 29-13°C-19°C-5°C 2009-42°C 200242%
Dec 30-13°C-19°C0°C 1998-42°C 200243%
Dec 31-13°C-19°C0°C 1994-32°C 199242%

Chance of rain

The chance of at least 1 mm of precipitation in the reanalysis on each date at Osa, in percent.010203040501102030
  • Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT+5).

December 1
sunrise 9:33 AM, sunset 4:41 PM
December 31
sunrise 9:59 AM, sunset 4:44 PM

Every day of December: sun and moon

Other months

Sources

Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.