Monthly climate guide
Copiapó weather in September
September in Copiapó is typically warm, with average daytime highs around 22°C (71°F) and night-time lows near 9°C (49°F). The month usually brings about 2 mm of rain (very dry) and is mostly sunny. Daytime highs are about the same as August and about the same as October.
What stands out in September
- Seasonally, September counts as early spring in Copiapó — the seasons are reversed south of the equator.
- Just 410 km apart, but Copiapó runs about 4°C warmer than Antofagasta this month.
- Expect a big gap between day and night — about 12°C.
Avg high
22°C
71°F
Avg low
9°C
49°F
Rainfall
2 mm
very dry
Humidity
68%
relative
Sky
30%
cloud · mostly sunny
Copiapó weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 28°C / 82°F | 15°C / 59°F | 2 mm | 65% | 26% |
| February | 28°C / 82°F | 16°C / 60°F | 2 mm | 66% | 25% |
| March | 26°C / 78°F | 14°C / 57°F | 2 mm | 70% | 29% |
| April | 23°C / 74°F | 13°C / 55°F | 1 mm | 73% | 31% |
| May | 21°C / 70°F | 11°C / 52°F | 5 mm | 72% | 43% |
| June | 20°C / 67°F | 10°C / 49°F | 9 mm | 68% | 35% |
| July | 19°C / 66°F | 9°C / 47°F | 5 mm | 68% | 37% |
| August | 20°C / 69°F | 9°C / 48°F | 2 mm | 67% | 31% |
| September | 22°C / 71°F | 9°C / 49°F | 2 mm | 68% | 30% |
| October | 23°C / 73°F | 10°C / 50°F | 1 mm | 66% | 32% |
| November | 25°C / 76°F | 12°C / 53°F | 1 mm | 66% | 27% |
| December | 26°C / 79°F | 13°C / 56°F | 1 mm | 65% | 27% |
What to pack for September
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- An extra layer — evenings are noticeably cooler than afternoons
- Sunglasses
Is September a good time to visit Copiapó?
Compare the months in the chart above to find your ideal window.
Best time to visit Copiapó →Other Chile cities in September
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Copiapó weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/chile/copiapo/september
<a href="https://weathercompare.eu/weather/chile/copiapo/september">Copiapó weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/chile/copiapo" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Copiapó weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/chile/copiapo/september">Copiapó weather in September</a> – WeatherCompare</p>
Copiapó in September: quick answers
Is September a good time to visit Copiapó?
September is a reasonable time for Copiapó: highs around 22°C and about 2 mm of rain, though not one of the three best months.
How warm is Copiapó in September?
Average highs are about 22°C (71°F) and average lows about 9°C (49°F), based on 10 years of daily data.
Does it rain a lot in Copiapó in September?
Copiapó typically gets around 2 mm of rain in September — very dry.
Figures are long-term averages for the area around Copiapó (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.