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South Pacific Region

Weather > South Pacific Region

South Pacific Region

Written By: Ryan Van Velzer
Last updated: Nov 01, 2022

The south Pacific weather region, which includes the Osa Peninsula, the south Pacific coast from Dominical to Sierpe and the highest concentration of biodiversity in the entire country, has a shorter dry season and experiences more intense afternoon storms than its counterpart, the north Pacific.

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From the end of December until April, the dry season's average temperatures are 79 degrees along the coast (average daytime of 88 degrees and evening temperatures of 71 degrees). In the lowlands during the wet season (May-Nov.) the southern Pacific weather region receives 157 inches of rain per year while the Osa Peninsula receives more than 197 inches of rain per year.

This region maintains an average humidity of 75 percent during the dry season, escalating slightly during the wet season (May-Nov.), and reaching 90 percent in July, October and December. Strangely enough, late June or July typically experiences a little dry season with a decrease in rainfall, but it is still one of the most humid months.

Corcovado

Month Average Highs Average Lows Average Rainfall Humidity
  F C F C in. mm %
Jan. 91 33 72 22 6.26 159 n/a
Feb. 92 33 71 22 5.75 146 n/a
Mar. 92 33 73 23 8.07 205 n/a
Apr. 91 33 73 23 11.02 280 n/a
May 90 32 73 23 18.9 480 n/a
Jun. 89 32 72 22 17.48 444 n/a
Jul. 89 32 71 22 18.9 480 n/a
Aug. 89 32 71 22 20.91 531 n/a
Sep. 90 32 71 22 21.97 558 n/a
Oct. 89 32 71 22 27.68 703 n/a
Nov. 89 32 71 22 22.28 566 n/a
Dec. 90 32 71 22 11.57 294 n/a

Golfito

Month Average Highs Average Lows Average Rainfall Humidity
  F C F C in. mm %
Jan. 91 33 72 22 6.26 159 83
Feb. 92 33 71 22 5.75 146 73
Mar. 92 33 73 23 8.07 205 80
Apr. 91 33 73 23 11.02 280 83
May 90 32 73 23 18.9 480 86
Jun. 89 32 72 22 17.48 444 88
Jul. 89 32 71 22 18.9 480 88
Aug. 89 32 71 22 20.91 531 87
Sep. 90 32 71 22 21.97 558 88
Oct. 89 32 71 22 27.68 703 88
Nov. 89 32 71 22 22.28 566 88
Dec. 90 32 71 22 11.57 294 85

Palmar Sur

Month Average Highs Average Lows Average Rainfall Humidity
  F C F C in. mm %
Jan. 91 33 69 21 1.97 50 84
Feb. 91 33 59 15 2.09 53 83
Mar. 93 34 71 22 3.82 97 83
Apr. 91 33 71 22 8.86 225 86
May 89 32 71 22 16.61 422 89
Jun. 89 32 71 22 16.06 408 89
Jul. 89 32 71 22 14.57 370 89
Aug. 87 31 89 32 16.3 414 89
Sep. 87 31 71 22 19.49 495 90
Oct. 87 31 71 22 23.5 597 91
Nov. 87 31 71 22 13.78 350 90
Dec. 89 32 71 22 4.17 106 87

Source: National Weather Services of Costa Rica

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