Peru (IL) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Peru.
Climate overview of Peru
Peru, Illinois, United States of America, sees big temperature differences between seasons, with July peaking at 29°C (84°F) and January dropping to -1°C (30°F).
The city has a wet climate, receiving around 1055 mm (42 in) of rain/snowfall per year. Despite the high annual total, it has warm summers and very cold winters. June is the wettest month.
Peru Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Peru - and find the best time to visit.
Monthly Temperature in Peru
Visitors to Peru can expect significant temperature changes throughout the year. On average, daytime temperatures range from a comfortable 29°C (84°F) in July to a very cold -1°C (30°F) in January.
Nighttime temperatures range from 18°C (64°F) in July to -10°C (14°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Peru
Peru is known for its substantial rain/snowfall, with annual precipitation reaching 1055 mm (42 in). The seasons in Peru bring significant changes in precipitation. The wettest month, June, receives high rainfall, with an average of 133 mm (5.2 in) of precipitation. This rainfall is distributed across 14 rainy days.
In contrast, the driest month, January, experiences much less snowfall, totaling 44 mm (1.7 in) over 10 snowy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Peru Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Peru
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: September
- Warmest weather: June, July and August
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -10°C (14°F).
Frequently asked questions about the climate in Peru
What is the best time to visit Peru?
September typically offers the most optimal weather in Peru. In contrast, January, February, March, November and December tend to have less optimal conditions. Peru has warm summers and very cold winters.
What temperatures can I expect in Peru?
Daytime highs range from -1°C (30°F) in January to 29°C (84°F) in July. Nighttime lows range from -10°C (14°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Peru get?
Annual rainfall is around 1055 mm (42 in). June is the wettest month with 133 mm (5.2 in), while January is the driest with 44 mm (1.7 in).
Peru 3-Day Forecast
Peru on the map
Peru is highlighted - select any city to see its climate.
Popular this month
Where to go in August - average daytime high across popular destinations.
Kissimmee
33°C (91°F) Orlando33°C (91°F) Miami Beach32°C (90°F) Destin32°C (90°F) New York City
29°C (84°F) Big Bear Lake
27°C (81°F) Los Angeles
24°C (75°F) San Francisco22°C (72°F) 
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Sedona: Explore Majestic Red Rock Landscapes
A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States
Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.