Last updated: August 23, 2025
In September, the average temperature in San Bartolome Milpas Altas, Guatemala hovers around 20°C (68°F), creating a pleasant climate. Expect minimums of about 13°C (56°F) and maximums reaching 28°C (83°F). However, stay prepared for 293 mm (11.6 in) of precipitation spread over 27 days, contributing to a high average humidity level of 82%.
In September in San Bartolome Milpas Altas, the average temperature is 20°C (68°F). The maximum can reach 28°C (83°F) and the minimum can be as low as 13°C (56°F). This pleasant climate makes San Bartolome Milpas Altas an ideal destination for travelers seeking comfortable weather and enjoyable outdoor activities.
In San Bartolome Milpas Altas in September, the precipitation amount is 293 mm (11.6 in) during 27 days, indicating a relatively wet period for that time of year.
In San Bartolome Milpas Altas in September humidity is 82%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that makes traveling a bit sluggish but surprisingly refreshing, as long as you take breaks in shaded areas to cool off.
In San Bartolome Milpas Altas 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 Bartolome Milpas Altas.
UV Risk Categories
Weather in San Bartolome Milpas Altas varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Bartolome Milpas Altas, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 19°C (66°F) | 9 mm (0.4 inches) | 76% | extreme |
| February Weather | 20°C (68°F) | 20 mm (0.8 inches) | 68% | extreme |
| March Weather | 20°C (69°F) | 22 mm (0.9 inches) | 59% | extreme |
| April Weather | 21°C (70°F) | 97 mm (3.8 inches) | 57% | extreme |
| May Weather | 21°C (69°F) | 264 mm (10.4 inches) | 65% | extreme |
| June Weather | 20°C (69°F) | 358 mm (14.1 inches) | 66% | extreme |
| July Weather | 21°C (69°F) | 111 mm (4.4 inches) | 75% | extreme |
| August Weather | 20°C (69°F) | 229 mm (9.0 inches) | 82% | extreme |
| September Weather | 20°C (68°F) | 293 mm (11.6 inches) | 82% | extreme |
| October Weather | 20°C (68°F) | 252 mm (9.9 inches) | 83% | extreme |
| November Weather | 19°C (67°F) | 50 mm (2.0 inches) | 80% | very high |
| December Weather | 19°C (66°F) | 12 mm (0.5 inches) | 76% | very high |