Last updated: August 23, 2025
In September, the average temperature in San Andres, Guatemala hovers around 28°C (82°F). While you can expect a minimum of 22°C (72°F), don't be surprised if temperatures peak at a scorching 38°C (101°F). With an average precipitation of 219 mm (8.6 in) spread over 25 days, it’s wise to be prepared for some rain. The air remains quite humid, with an average of 77%, making for a tropical experience!
In September in San Andres, the average temperature is 28°C (82°F), with maximums reaching up to 38°C (101°F) and minimums dropping as low as 22°C (72°F). This makes it an ideal destination for travelers seeking warm weather and plenty of sunshine.
In San Andres, in September, the total precipitation amount is 219 mm (8.6 in), recorded over a span of 25 days.
In San Andres in September humidity is 77%. With an average temperature of 28°C (82°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities sticky and exhausting, but also offers a lush vibrancy to the landscape, perfect for enjoying leisurely strolls in the early morning or late afternoon.
In San Andres in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in San Andres.
UV Risk Categories
Weather in San Andres varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Andres, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 24°C (75°F) | 29 mm (1.1 inches) | 84% | very high |
| February Weather | 26°C (79°F) | 12 mm (0.5 inches) | 73% | extreme |
| March Weather | 28°C (82°F) | 28 mm (1.1 inches) | 59% | extreme |
| April Weather | 30°C (87°F) | 24 mm (0.9 inches) | 52% | extreme |
| May Weather | 30°C (87°F) | 101 mm (4.0 inches) | 53% | extreme |
| June Weather | 28°C (83°F) | 254 mm (10.0 inches) | 55% | extreme |
| July Weather | 28°C (83°F) | 119 mm (4.7 inches) | 61% | extreme |
| August Weather | 28°C (84°F) | 142 mm (5.6 inches) | 71% | extreme |
| September Weather | 28°C (82°F) | 219 mm (8.6 inches) | 77% | extreme |
| October Weather | 27°C (80°F) | 184 mm (7.2 inches) | 78% | extreme |
| November Weather | 25°C (77°F) | 88 mm (3.5 inches) | 82% | very high |
| December Weather | 24°C (76°F) | 48 mm (1.9 inches) | 86% | very high |