Castel Gandolfo Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Castel Gandolfo.
Climate overview of Castel Gandolfo
Castel Gandolfo, Lazio, Italy, sees big temperature differences between seasons, with August peaking at 31°C (88°F) and January dropping to 13°C (55°F).
With around 1015 mm (40 in) of annual rainfall, Castel Gandolfo has a notably wet climate. However, this rainfall is not evenly distributed, the city has a distinct dry season from July to August, with very warm summers and mild winters. The wettest month is November. The sunniest month is July, with 11.1 hours of sunshine per day on average.
Castel Gandolfo Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Castel Gandolfo - and find the best time to visit.
Monthly Temperature in Castel Gandolfo
Visitors to Castel Gandolfo can expect significant temperature changes throughout the year. Average daytime temperatures reach a very warm 31°C (88°F) in August. In January, the coolest month of the year, temperatures drop to a moderate 13°C (55°F).
At night, temperatures range from around 20°C (68°F) in August to 5°C (41°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Castel Gandolfo
Castel Gandolfo is known for its substantial rainfall, with annual precipitation reaching 1015 mm (40 in). Castel Gandolfo can be quite wet during November, receiving approximately 153 mm (6 in) of precipitation over 15 rainy days.
In contrast, during the driest month (July), you will experience much drier conditions, with 27 mm (1.1 in) of precipitation spread across 5 rainy days. For more details, please visit our Castel Gandolfo Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Castel Gandolfo
Castel Gandolfo can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 11.1 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 3.7 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Castel Gandolfo by Month
The relative humidity is high throughout the year in Castel Gandolfo.
The city experiences its highest humidity in November, reaching 77%. In July, the humidity drops to its lowest level at 72%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Castel Gandolfo
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, June and September
- Warmest weather: July and August
- Most sunshine: July
- Fewest rainy days: July and August
- Wettest months: September, October, November and December, when rainfall is highest.
- Seasonal pattern: A distinct dry season from July to August, with very warm summers and mild winters
Frequently asked questions about the climate in Castel Gandolfo
What is the best time to visit Castel Gandolfo?
May, June and September typically offer the most optimal weather in Castel Gandolfo. In contrast, January, February, November and December tend to have less optimal conditions. Castel Gandolfo has a distinct dry season from July to August, with very warm summers and mild winters.
What temperatures can I expect in Castel Gandolfo?
Daytime highs range from 13°C (55°F) in January to 31°C (88°F) in August. Nighttime lows range from 5°C (41°F) to 20°C (68°F). Temperatures vary considerably through the year.
How much rain does Castel Gandolfo get?
Annual rainfall is around 1015 mm (40 in). November is the wettest month with 153 mm (6 in), while July is the driest with 27 mm (1.1 in).
How sunny is Castel Gandolfo?
Castel Gandolfo receives around 2,473 hours of sunshine per year. July is the sunniest month with 332 hours, while December is the cloudiest with just 112 hours. Overall, Castel Gandolfo enjoys abundant sunshine.
Castel Gandolfo 3-Day Forecast
Castel Gandolfo on the map
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