Monthly climate guide
Alcalá de Henares weather in September
Expect hot weather in Alcalá de Henares in September: afternoons reach about 28°C (82°F), while nights drop to around 13°C (56°F). Around 25 mm of rain falls over the month (fairly dry), and skies are a mix of sun and cloud. Daytime highs are 5°C cooler than August and 6°C warmer than October.
What stands out in September
- September brings early autumn to Alcalá de Henares.
- Just 50 km apart, but Alcalá de Henares runs about 2°C warmer than Miraflores de la Sierra this month.
- Afternoons and nights feel like different seasons, roughly 14°C apart.
- It cools down fast from here: October is about 6°C cooler.
Avg high
28°C
82°F
Avg low
13°C
56°F
Rainfall
25 mm
fairly dry
Humidity
50%
relative
Sky
39%
cloud · a mix of sun and cloud
Alcalá de Henares weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 10°C / 50°F | 0°C / 31°F | 31 mm | 82% | 54% |
| February | 11°C / 53°F | 0°C / 32°F | 28 mm | 76% | 52% |
| March | 15°C / 59°F | 2°C / 36°F | 53 mm | 71% | 56% |
| April | 18°C / 64°F | 5°C / 41°F | 60 mm | 68% | 61% |
| May | 23°C / 74°F | 9°C / 47°F | 37 mm | 59% | 53% |
| June | 29°C / 84°F | 13°C / 56°F | 21 mm | 48% | 38% |
| July | 33°C / 92°F | 17°C / 62°F | 11 mm | 38% | 23% |
| August | 33°C / 91°F | 17°C / 62°F | 15 mm | 38% | 27% |
| September | 28°C / 82°F | 13°C / 56°F | 25 mm | 50% | 39% |
| October | 21°C / 71°F | 9°C / 48°F | 42 mm | 64% | 47% |
| November | 14°C / 57°F | 4°C / 39°F | 52 mm | 79% | 60% |
| December | 11°C / 52°F | 1°C / 33°F | 24 mm | 82% | 53% |
What to pack for September
- Light, breathable clothing (cotton or linen)
- A sun hat and high-SPF sunscreen
- A refillable water bottle
- An extra layer — evenings are noticeably cooler than afternoons
- Sunglasses
Is September a good time to visit Alcalá de Henares?
Compare the months in the chart above to find your ideal window.
Best time to visit Alcalá de Henares →Other Spain cities in September
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Alcalá de Henares weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/spain/alcala-de-henares/september
<a href="https://weathercompare.eu/weather/spain/alcala-de-henares/september">Alcalá de Henares weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/spain/alcala-de-henares" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Alcalá de Henares weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/spain/alcala-de-henares/september">Alcalá de Henares weather in September</a> – WeatherCompare</p>
Alcalá de Henares in September: quick answers
Is September a good time to visit Alcalá de Henares?
Yes. September is one of the best months for Alcalá de Henares, with highs around 28°C and about 25 mm of rain.
How warm is Alcalá de Henares in September?
Average highs are about 28°C (82°F) and average lows about 13°C (56°F), based on 10 years of daily data.
Does it rain a lot in Alcalá de Henares in September?
Alcalá de Henares typically gets around 25 mm of rain in September — fairly dry.
Figures are long-term averages for the area around Alcalá de Henares (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.