Report inappropriate photo

Weather Analysis and Forecast for San Francisco, Costa Rica
September 16-18, 2024

As we step into the middle of September, the weather in San Francisco, Costa Rica is expected to showcase a mix of fog, light rain showers, and some sunny intervals in the coming days. The forecast is characterized by relatively mild temperatures but a notable presence of humidity and fog, especially in the mornings and evenings.

Day 1: Monday, September 16, 2024

On Monday, residents can anticipate a maximum temperature reaching around 24°C (75°F) while the minimum dips to 16°C (60°F). The day starts with fog, giving way to light rain showers later in the day, particularly in the late morning and early afternoon. Expect total precipitation for the day to be around 2.1 mm. Humidity levels will linger at a high 76% to 97%, creating a sticky feel to the air.

The sun will rise at 5:26 AM and set at 5:35 PM, providing an excellent 9.3 hours of daylight. While the UV index is quite high at 11, making sun protection essential during peak hours.

Day 2: Tuesday, September 17, 2024

The weather on Tuesday displays a similar pattern, with temperatures ranging from 15°C (60°F) to 24°C (74°F). The morning will begin with mist, transitioning into patchy rain after the sun rises. High humidity remains a significant factor, peaking at an index of 89%. Rainfall is expected to be slightly more prominent, tallying up to around 2.5 mm throughout the day.

Tuesday’s UV index remains elevated at 11, so it's crucial to stay safe in the sun if you're outdoors during the midday hours.

Day 3: Wednesday, September 18, 2024

As we approach Wednesday, the weather begins to shift slightly. The temperatures will range from a comfortable 14°C (58°F) to 24°C (76°F). This day marks the full moon, which will rise around 6:14 PM, accompanied by an increase in visibility post-rains.

Morning fog will clear up by mid-morning, likely giving way to sunny skies for a portion of the day, particularly around midday when the temperatures are at their highest. Expect brief intermittent light rain showers and an overall UV index of 11.

Weather Highlights:

• Fog and Mist: A significant part of the forecast with high chances of fog, especially in the early morning.


• Precipitation: Expect light rain on all three days, particularly on Tuesday and possible rain showers picking up into Wednesday.


• Humidity Levels: Ranging from 76% to 97%, creating a humid atmosphere, influencing personal comfort levels outdoors.


• Visibility: Reduced visibility in the mornings due to fog; clear conditions anticipated as the day progresses.

For detailed insights on future weather patterns for San Francisco, Costa Rica, you can visit our pages for the Next 5 Days Weather and the Hour by Hour Weather.

With this forecast, we encourage residents to prepare for the mixed weather ahead while taking advantage of the milder temperatures and the beauty of the changing skies. Stay tuned for further updates as conditions evolve!