Climate Overview
The climate in Alcázar de San Juan is temperate. The average annual temperature is 16°C and approximately 359mm of precipitation falls per year. April is the wettest month, receiving around 52mm of rainfall. Alcázar de San Juan is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, December, when temperatures can drop to 2°C.
Temperature
Temperatures in Alcázar de San Juan vary considerably across the year, with a 34°C difference between the coldest and warmest months. July is the hottest month, with daytime highs reaching 36°C and an average of 29°C. January is the coolest month, with minimum temperatures around 2°C and an average of 6°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 6°C shift in average temperatures.
Precipitation
Alcázar de San Juan is a quite dry location, receiving approximately 359mm of precipitation annually, which averages out to around 30mm per month. The wettest month is April, averaging 52mm of rainfall. October and March also tend to see above-average precipitation. The driest month is July, with just 6mm. That's 46mm less than April, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
Alcázar de San Juan is mildly breezy, with an average annual wind speed of 18km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 20km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in December, with average winds dropping to 16km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months.
Seasons
89 days until Summer
It is currently spring in Alcázar de San Juan, which began on March 20, 2026. Alcázar de San Juan is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 36°C, while the coldest stretch bottoms out in January near 2°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 6 to 25°C. Rainfall is relatively light, with around 128mm over the season and a monthly average of 43mm. Winds are moderate at around 19km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 17 to 36°C. Precipitation is minimal, with only around 33mm for the entire season. Winds are moderate at around 18km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 7 to 28°C. Rainfall is relatively light, with around 114mm over the season and a monthly average of 38mm. Winds are moderate at around 17km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from 2 to 14°C. Rainfall is relatively light, with around 84mm over the season and a monthly average of 28mm. Winds are moderate at around 17km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Alcázar de San Juan is during May, June, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 29mm per month. By contrast, July can be uncomfortably hot with highs reaching 36°C, while January is the coldest period with lows dropping to 2°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.
Monthly Climate Data
The table below shows monthly climate averages for Alcázar de San Juan based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
