What the averages say
The mean annual temperature is 15.3 °C. The warmest month is July, averaging 26.1 °C with highs around 33.4 °C; the coldest is January, averaging 6.4 °C with lows of 2.0 °C. The 31 degrees between the mean high of July and the mean low of January are the real measure of how continental this climate is.
Heat, cold and extremes
On average, 80 days a year reach 30 °C or more and 23 bring frost. This is a climate of marked extremes. The highest reading in the series is 40.8 °C, set in August, and the lowest -7.6 °C, in January.
Rain, sun and wind
412 mm fall each year over 96 days with measurable rain, an amount heavily concentrated in the cold half of the year: October is the wettest month with 62 mm and July the driest with 8 mm. The sky is clear on 101 days a year. Mean wind speed is around 10 km/h and mean annual relative humidity 57 %.
Month by month
AEMET climate normals 1991-2020. Madrid, Cuatro Vientos observatory, 8.9 km from the centre at 690 m above sea level.| Monthly mean | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
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| Mean temperature | 6.4 | 7.8 | 10.9 | 13.3 | 17.4 | 22.7 | 26.1 | 25.7 | 21.1 | 15.6 | 10.0 | 7.0 |
|---|
| Mean high | 10.7 | 12.8 | 16.5 | 19.1 | 23.7 | 29.6 | 33.4 | 32.8 | 27.5 | 20.8 | 14.4 | 11.1 |
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| Mean low | 2.0 | 2.7 | 5.3 | 7.4 | 11.1 | 15.8 | 18.8 | 18.6 | 14.7 | 10.3 | 5.5 | 2.8 |
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| Rainfall (mm) | 33 | 35 | 35 | 44 | 44 | 19 | 8 | 11 | 26 | 62 | 52 | 42 |
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| Rain days | 8.9 | 6.7 | 8.9 | 10.5 | 10.6 | 5.8 | 2.7 | 3.4 | 6.2 | 10.9 | 10.8 | 10.1 |
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| Days ≥ 30 °C | 0.0 | 0.0 | 0.0 | 0.0 | 3.5 | 15.6 | 25.9 | 25.0 | 9.6 | 0.5 | 0.0 | 0.0 |
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| Frost days | 8.7 | 4.8 | 1.4 | 0.1 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.6 | 6.4 |
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Where this data comes from
These are the 1991-2020 climate normals published by AEMET, the Spanish state meteorological agency, for the Madrid, Cuatro Vientos observatory — the nearest official station with a complete series to Mostoles today. A normal is not a forecast: it describes a thirty-year average, and any given day can depart from it widely. For tomorrow, use the forecast at the top of this page.
