Formello Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Formello.
Climate overview of Formello
The climate in Formello, Lazio, Italy, is marked by large temperature swings across the seasons, ranging from 32°C (90°F) in August to 12°C (54°F) in January.
The city receives around 999 mm (39 in) of rainfall per year. It experiences a distinct dry season from July to August, with very warm summers and mild winters. November is the wettest month and July the driest. Sunshine peaks in July, when the city sees around 11.1 hours of sunshine per day.
Formello Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Formello - and find the best time to visit.
Monthly Temperature in Formello
In Formello, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a very warm 32°C (90°F) in August to a moderate 12°C (54°F) in January.
Nighttime temperatures range from 20°C (68°F) in August to 4°C (39°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Formello
On average, Formello receives a reasonable amount of rainfall, with an annual precipitation of 999 mm (39 in). The seasons in Formello bring significant changes in precipitation. The wettest month, November, receives high rainfall, with an average of 147 mm (5.8 in) of precipitation. This rainfall is distributed across 15 rainy days.
In contrast, the driest month, July, experiences much less rainfall, totaling 27 mm (1.1 in) over 5 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Formello 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 Formello
In Formello, summer days are longer and more sunny, with daily sunshine hours peaking at 11.1 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 3.7 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Formello by Month
The relative humidity is high throughout the year in Formello.
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 Formello
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May and June
- Warmest weather: July and August
- Most sunshine: July
- Fewest rainy days: July and August
- Seasonal pattern: A distinct dry season from July to August, with very warm summers and mild winters
Frequently asked questions about the climate in Formello
What is the best time to visit Formello?
May and June typically offer the most optimal weather in Formello. In contrast, December tends to have less optimal conditions. Formello has a distinct dry season from July to August, with very warm summers and mild winters.
What temperatures can I expect in Formello?
Daytime highs range from 12°C (54°F) in January to 32°C (90°F) in August. Nighttime lows range from 4°C (39°F) to 20°C (68°F). Temperatures vary considerably through the year.
How much rain does Formello get?
Annual rainfall is around 999 mm (39 in). November is the wettest month with 147 mm (5.8 in), while July is the driest with 27 mm (1.1 in).
How sunny is Formello?
Formello 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, Formello enjoys abundant sunshine.
Formello 3-Day Forecast
Formello 3-Day Forecast
Formello on the map
Formello is highlighted - select any city to see its climate.
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