Guanacasteca
September
Weather in Guanacasteca for September 2025
Your guide to Guanacasteca weather in September - trends and predictions
LLUVIAS Y TORMENTAS - See hour by hour.
Until now, September 2025 in Guanacasteca is slightly cooler than the historical average by -0.8 °C.
The forecast for the next days in Guanacasteca predicts temperatures to be around 22 °C, close to the historical average.
In general, the average temperature in Guanacasteca at the beginning of September is 22 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 22.3 °C by the end of September.
Guanacasteca experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 744.6 mm.
Official Weather Alert ⚠️
Temperatures
Rain 🌧️
0
Dry days
30
Rainy days
0
Snow days
22°/14°
Temperatures
4 km/h
Avg max wind
91 %
Avg humidity
Guanacasteca Weather September
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Temperatures trend during September in Guanacasteca
See the weather trend as well as the moving average line
September weather in Guanacasteca day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Moderate or heavy rain shower | 22° /13° | 15.1 mm | 5 | |
| 2 Sept. | Moderate or heavy rain shower | 22° /13° | 40.9 mm | 5 | |
| 3 Sept. | Moderate or heavy rain shower | 21° /13° | 19 mm | 5 | |
| 4 Sept. |  Light rain shower | 22° /13° | 14.8 mm | 5 | |
| 5 Sept. | Light rain shower | 23° /13° | 22.3 mm | 5 | |
| 6 Sept. |  Torrential rain shower | 22° /13° | 46.8 mm | 5 | |
| 7 Sept. | Torrential rain shower | 22° /14° | 53.7 mm | 5 | |
| 8 Sept. | Light rain shower | 21° /14° | 23.4 mm | 5 | |
| 9 Sept. | Light rain shower | 22° /13° | 25.3 mm | 5 | |
| 10 Sept. | Moderate or heavy rain shower | 24° /13° | 10.2 mm | 5 | |
| 11 Sept. | Light rain shower | 24° /13° | 10.7 mm | 5 | |
| 12 Sept. | Light rain shower | 23° /13° | 12.3 mm | 5 | |
| 13 Sept. | Light rain shower | 22° /14° | 21.3 mm | 5 | |
| 14 Sept. | Moderate or heavy rain shower | 22° /14° | 17.2 mm | 5 | |
| 15 Sept. | Light rain shower | 24° /13° | 6.8 mm | 6 | |
| 16 Sept. |  Moderate rain | 22° /14° | 7.3 mm | 2.4 | |
| 17 Sept. | Heavy rain | 22° /15° | 37.4 mm | 1.7 | |
| 18 Sept. | Heavy rain | 21° /14° | 38.7 mm | 1.1 | |
| 19 Sept. | Moderate rain | 21° /14° | 12.3 mm | 0.5 | |
| 20 Sept. | Moderate rain | 23° /14° | 14.1 mm | 0 | |
| 21 Sept. | Patchy rain possible | 22° /14° | 2.8 mm | 4 | |
| 22 Sept. | Patchy rain possible | 22° /14° | 1.8 mm | 4 | |
| 23 Sept. | Patchy rain possible | 22° /14° | 3.7 mm | 4 | |
| 24 Sept. | Patchy rain possible | 24° /13° | 1.3 mm | 4 | |
| 25 Sept. | Patchy rain possible | 22° /14° | 1.8 mm | 4 | |
| 26 Sept. | Patchy rain possible | 23° /13° | 3.5 mm | 4 | |
| 27 Sept. | Moderate rain | 22° /14° | 6.5 mm | 4 | |
| 28 Sept. | Patchy rain possible | 22° /14° | 4.8 mm | 4 | |
| 29 Sept. | Moderate rain | 22° /16° | 9.7 mm | 4 | |
| 30 Sept. | Light rain shower | 21° /14° | 22.4 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Guanacasteca in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Guanacasteca forecast closer to your planned date for the most up-to-date weather information.
Change Month
Guanacasteca in September - FAQ
What are the expected maximum and minimum temperatures in Guanacasteca during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Guanacasteca during September?
Significant rainfall exceeding 744.6 mm is expected in Guanacasteca during September, occurring over more than 30 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Guanacasteca during September?
The average wind speed in Guanacasteca during September is 4 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Guanacasteca
Explore the daily rainfall trends and prepare for Guanacastecas September weather 💧
UV exposure in Guanacasteca during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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