Guanacaste National Park
- Annual mean
- 25.8 °C
- Warmest month
- May
- Wettest month
- October
Long-term representative averages for temperature, precipitation, and daylight duration
Analyze the established annual climate rhythm for St. Herman's Blue Hole National Park using representative station data from 1991 to 2020. Measurements include monthly average temperature, precipitation rates, relative humidity, wind speed, and daylight duration at a fixed coordinate. Consistent long-term climate normals offer a quantitative perspective on atmospheric conditions throughout the calendar year.
Comparing thirty years of average monthly thermal ranges and fluctuating daily precipitation rates.
Comparing thirty years of temperature bounds, daily precipitation rates, and calculated daylight hours.
| Mean temperature | Precipitation | Humidity | Wind speed | Daylight | |
|---|---|---|---|---|---|
| January | 21.3 °C13.3° to 28.9° | 3.4 mm/day | 86.7% | 1.7 m/s | 11.1 hours |
| February | 22.4 °C14.7° to 31.7° | 1.9 mm/day | 81.4% | 1.8 m/s | 11.4 hours |
| March | 24 °C15.5° to 35.3° | 1.6 mm/day | 74.9% | 1.9 m/s | 11.9 hours |
| April | 26 °C18.5° to 37.3° | 1.3 mm/day | 71.5% | 2 m/s | 12.4 hours |
| May | 26.4 °C20.5° to 35.9° | 3.5 mm/day | 74.8% | 2 m/s | 12.8 hours |
| June | 25.5 °C21.5° to 32.4° | 7.1 mm/day | 84.9% | 1.9 m/s | 13 hours |
| July | 24.8 °C21.2° to 29.9° | 5.6 mm/day | 87.5% | 1.9 m/s | 12.9 hours |
| August | 24.9 °C21.3° to 30.2° | 6.1 mm/day | 88% | 1.7 m/s | 12.6 hours |
| September | 24.8 °C21.5° to 29.9° | 7.1 mm/day | 90.3% | 1.4 m/s | 12.1 hours |
| October | 23.9 °C18.3° to 29.2° | 7.5 mm/day | 91.1% | 1.5 m/s | 11.6 hours |
| November | 22.3 °C15.1° to 28.5° | 6.1 mm/day | 90.4% | 1.6 m/s | 11.2 hours |
| December | 21.5 °C14.2° to 28.3° | 4.2 mm/day | 89.3% | 1.6 m/s | 11 hours |
See two months side by side and how much they differ. Both use the same 1991–2020 climate normals and NASA POWER data point as the table above, so they show typical conditions, not a forecast.
An analytical look at long-term monthly averages for temperature, wind, and precipitation
Interactive climate map
Open the climate map to compare monthly temperature, precipitation, and other averages.
Trace annual weather patterns and seasonal variations across different regional protected areas

Deepen your atlas understanding of St. Herman's Blue Hole National Park by exploring its specific geographic attributes and mapped protected area features. This destination offers vital context for comprehending the distribution and character of natural landscapes within the Cayo District. Continue your discovery to grasp the full atlas significance of this protected land.