Lookout Inn Lodge  

Osa Peninsula Weather

Today's Forecast for Carate

Rainfall Data for Lookout Inn and Carate

Terry Conroy and Katya Ballanero Quesada at the Lookout Inn have been measuring and recording daily precipitation since July 1998.   Below are a climatological summary and a few comments, by Steven Worley.

Below is a chart that shows the minimum, maximum, and mean (average) precipitation by month at the Lookout Inn.  September, October, and November are the wettest months and January, February, and March are the driest, on average.  There is huge variability, for example the driest November had 11.9 (2002) inches of rain and the wettest had 88.8 (1999) inches.

Monthly total rainfall (inches) at Lookout Inn (Carate) Costa Rica. 
Daily measurements collected by Terry Conroy and Katya of Lookout Inn

Rainfall Minimum 1998-2009 Minimum   Rainfall Minimum 1998-2009 Average   Rainfall Minimum 1998-2009 Maximum
Osa Peninsula Weather Chart

If we look at the mean precipitation and the expected variability around that value we see, on average, the wettest month is October and the driest is February.  Keep in mind these are statistics for a 12-year period and any particular year is more difficult to predict.

Osa Peninsula Weather Chart

The chart below shows the annual amount of rain for the full period of record (1998 is not shown since the data collection begins in July). 2009 (164 inches) was the driest year and 2004 (373 inches) was the wettest. What causes this? Possible large scale forcing is related to the position of the Inter-tropical Convergence Zone, the strength of El Nino or La Nina, and the activity of Atlantic Hurricanes or Pacific Typhoons. More work needs to be done on this and it is made difficult with the short, 12-year, data record.

Osa Peninsula Weather Chart

Osa Peninsula Monthly Rainfall Totals Yellow indicates monthly estimates provided by Terry of Lookout Inn

  1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
Jan   4.6 8.5 7.9 11 0.0 0.0 6.3 4.8 0.0 0.8 0.1
Feb   4.2 0.0 0.0 0.6 0.0 0.7 4.2 1.4 3.3 7.1 0.0
Mar   3.3 0.3 1.8 3.1 4.5 2.8 13.3 5.6 5.3 6.0 1.3
Apr   8.7 10.3 15.3 8.9 13.4 20.7 17.4 8.7 6.4 2.0 0.8
May   18.0 33.4 18.7 20.7 36.4 48.5 33.6 27.7 50.0 27.1 16.2
Jun   27.0 27.2 8.7 32.0 41.4 28.7 25.6 25.3 10.5 15.5 15.4
Jul 11.5 29.5 18.1 25.0 32.4 45.1 35.6 28.7 29.4 32.4 28.6 12.7
Aug 18.2 29.8 16.1 17.2 12.8 34.8 53.8 25.9 28.5 39.8 37.9 16.1
Sep 31.8 50.8 31.4 41.2 15.7 28.8 63.2 56.4 16.1 30.1 34.4 25.2
Oct 63.5 33.7 14.8 49.3 48.5 62.6 70.3 60.5 48.7 88.0 52.0 44.6
Nov 29.8 88.8 47.4 49.4 11.9 29.5 42.7 50.0 21.7 21.9 71.9 28.4
Dec 33.7 49.1 28.5 50.3 13.6 30.1 6.1 2.1 15.4 18.7 5.6 13.3
YEAR
TOTAL
  347.5 236.0 284.8 211.2 326.6 373.1 324.1 233.3 336.4 288.9 163.9



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The Lookout Inn Lodge

Osa Peninsula Beach Rainforest Eco Lodge Accommodations
Carate - Peninsula de Osa, Puntarenas, Costa Rica
TELEPHONE our office in Costa Rica: 011-506-2735-5431
FAX our office in Costa Rica: 011-506-2735-5431
Call direct to Lookout Inn (USA Number): (757) 644-5967
E-mail: info@lookout-inn.com