Alajuela Province (La Fortuna)
September
Weather in Alajuela Province for September 2026
Your guide to Alajuela Province weather in September - trends and predictions
Until now, September 2026 in Alajuela Province is slightly cooler than the historical average by 1.1 °C.
Expect cooler weather in the next days in Alajuela Province with the forecast suggesting a temperature of 27.8 °C, lower than the historical average.
In general, the average temperature in Alajuela Province at the beginning of September is 28.3 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 29 °C by the end of September.
Alajuela Province experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 317.4 mm.
Temperatures
Rain 🌧️
0
Dry days
30
Rainy days
0
Snow days
29°/21°
Temperatures
6 km/h
Avg max wind
89 %
Avg humidity
Alajuela Province Weather September
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Temperatures trend during September in Alajuela Province
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September weather in Alajuela Province day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Fog | 27° /20° | 5.5 mm | 5 | |
| 2 Sept. | Fog | 29° /20° | 10.9 mm | 5 | |
| 3 Sept. |  Light rain shower | 29° /21° | 11.2 mm | 7 | |
| 4 Sept. | Light rain shower | 29° /20° | 10 mm | 5 | |
| 5 Sept. | Light rain shower | 29° /21° | 7.7 mm | 5 | |
| 6 Sept. |  Moderate or heavy rain shower | 27° /20° | 18.1 mm | 5 | |
| 7 Sept. | Moderate or heavy rain shower | 28° /20° | 17.2 mm | 5 | |
| 8 Sept. | Light rain shower | 28° /20° | 8.4 mm | 5 | |
| 9 Sept. | Light rain shower | 29° /22° | 9.3 mm | 5 | |
| 10 Sept. |  Patchy light rain with thunder | 29° /22° | 12.9 mm | 5 | |
| 11 Sept. | Moderate or heavy rain shower | 29° /21° | 11.7 mm | 5 | |
| 12 Sept. | Light rain shower | 29° /22° | 13.8 mm | 5 | |
| 13 Sept. | Patchy light rain with thunder | 28° /22° | 19.3 mm | 5 | |
| 14 Sept. | Light rain shower | 30° /21° | 21 mm | 5 | |
| 15 Sept. | Patchy light rain with thunder | 28° /21° | 44.2 mm | 5 | |
| 16 Sept. | Moderate or heavy rain shower | 28° /21° | 16.9 mm | 5 | |
| 17 Sept. | Patchy light rain with thunder | 29° /21° | 14.4 mm | 5 | |
| 18 Sept. | Patchy light rain with thunder | 28° /21° | 8.2 mm | 5 | |
| 19 Sept. | Moderate or heavy rain shower | 29° /22° | 19.4 mm | 5 | |
| 20 Sept. | Light rain shower | 30° /22° | 12 mm | 5 | |
| 21 Sept. | Light rain shower | 28° /22° | 9.9 mm | 5 | |
| 22 Sept. | Light rain shower | 30° /21° | 12 mm | 5 | |
| 23 Sept. | Light rain shower | 31° /21° | 7.1 mm | 5 | |
| 24 Sept. | Patchy rain possible | 29° /21° | 6.7 mm | 5 | |
| 25 Sept. | Light rain shower | 28° /21° | 12.4 mm | 5 | |
| 26 Sept. |  Patchy light drizzle | 31° /21° | 8.7 mm | 5 | |
| 27 Sept. | Light rain shower | 28° /21° | 8.7 mm | 10.2 | |
| 28 Sept. | Light rain shower | 28° /21° | 5.4 mm | 11.1 | |
| 29 Sept. | Light rain shower | 28° /22° | 5.8 mm | 9.6 | |
| 30 Sept. | Fog | 31° /22° | 8.6 mm | 9.6 | |
| Next | |||||
Important Notice
Our weather forecast for Alajuela Province 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 Alajuela Province forecast closer to your planned date for the most up-to-date weather information.
Change Month
Alajuela Province in September - FAQ
What are the expected maximum and minimum temperatures in Alajuela Province during September?
During September, expect a variety of temperatures with highs around 29° and lows near 21°, suitable for diverse activities and preferences.
How much rainfall should be expected in Alajuela Province during September?
Significant rainfall exceeding 317.4 mm is expected in Alajuela Province during September, occurring over more than 30 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Alajuela Province during September?
The average wind speed in Alajuela Province during September is 6 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Alajuela Province
Explore the daily rainfall trends and prepare for Alajuela Provinces September weather 💧
Typically, Alajuela Province has 30 rainy days in September with a total of 317.4 mm of rainfall.
UV exposure in Alajuela Province during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Alajuela Province?Get accurate weather forecasts for Alajuela Province, located at latitude 10.471 and longitude -84.645. Stay updated with localized weather information tailored for Alajuela Province.
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