- Rain mm/yr
- 4,384
- Snowfall
- Not applicable — tropical coastal climate, no snow.
Updated July 2026 · Sources cited: weather-atlas.com, weather-and-climate.com
Good to know
Good to Know
- During the rainy season (May–November), afternoon showers are predictable and brief; mornings are generally sunny, making early-morning tours ideal.
- March and April see the highest daytime temperatures, reaching 33–34°C (91–94°F); hydration is essential.
- October is the peak of the rainy season with the heaviest rainfall and occasional flash floods near rivers—exercise caution near waterways when water appears discolored.
- The dry season (December–April) attracts large crowds and higher prices; November offers good value as rainy-season rates remain low but conditions improve mid-month.
- Sea temperatures remain warm year-round (27–29°C / 81–85°F), warmest in April.
- UV index remains consistently high (average 7) throughout the year; sunscreen is essential daily.
Peak Month
- Month
- March
Daytime High
- Celsius
- 30
- Fahrenheit
- 86
Nighttime Low
- Celsius
- 25
- Fahrenheit
- 77
Off Peak Month
- Month
- October
Daytime High
- Celsius
- 28
- Fahrenheit
- 82
Nighttime Low
- Celsius
- 24
- Fahrenheit
- 75
Seasons
Dry Season
- Months
- December to April
- Characteristics
- Clear skies, warm temperatures, minimal rainfall, ideal for beach activities and outdoor sports. January, February, and March are the most predictable months.
Rainy Season
- Months
- May to November
- Characteristics
- Afternoon and evening showers, high humidity, lush green landscapes, fewer tourists. Mornings typically remain sunny and suitable for activities.
Humidity
- Note
- Relative humidity is lowest in February and March (~68%) and highest in June and October (~80-88%).
Jaco has a tropical climate with warm temperatures year-round and distinct dry and rainy seasons. The dry season runs December through April with minimal rainfall and peak sunshine, while the rainy season (May to November) features afternoon showers and high humidity.
Rainfall
- Annual Total Mm
- 4384
- Annual Total Inches
- 173
- Note
- September is the second-wettest month with ~383mm of rainfall. During the rainy season, precipitation typically occurs in brief afternoon or evening showers.
Driest Month
- Month
- February
- Rainy Days
- 7
- Rainfall Mm
- 46
- Rainfall Inches
- 1.8
Wettest Month
- Month
- October
- Rainy Days
- 19
- Rainfall Mm
- 560
- Rainfall Inches
- 22
Snowfall
Not applicable — tropical coastal climate, no snow.
Sunshine Hours
- Peak Month
- March with ~9.4 hours per day
- Lowest Month
- October with ~5 hours per day
AI-generated estimateData refreshed July 2026
Sources cited for this category
These are the sources cited in this climate & weather research for this city. Individual figures may not each trace to one of them.
More About Jacó
Data last updated July 2026 · Verify anything important.