Climate and monthly weather forecast
Peru, IL

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Weather in January

January, the same as December, in Peru, Illinois, is a freezing cold winter month, with an average temperature varying between 28.9°F (-1.7°C) and 16.9°F (-8.4°C). January, with an average high of 28.9°F (-1.7°C) and a low of 16.9°F (-8.4°C), signifies the coldest month of the year. Weather in January »

Weather in February

The last month of the winter, February, is a cold month in Peru, Illinois, with temperature in the range of an average low of 20.5°F (-6.4°C) and an average high of 33.4°F (0.8°C). The onset of February brings with it an average high-temperature of a wintry 33.4°F (0.8°C), showing a negligible variation from the month before. Weather in February »

Weather in March

The first month of the spring, March, is a chilly month in Peru, Illinois, with an average temperature fluctuating between 46.8°F (8.2°C) and 32.4°F (0.2°C). Observing a rise in March, the average high-temperature goes from February's cold 33.4°F (0.8°C) to a chilly 46.8°F (8.2°C). Weather in March »

Weather in April

April in Peru, Illinois, is a moderate spring month, with an average temperature ranging between max 58.8°F (14.9°C) and min 42.4°F (5.8°C). Peru's transition into April is marked by a rise in the average high-temperature, advancing from a chilly 46.8°F (8.2°C) in March to a mild 58.8°F (14.9°C). Weather in April »

Weather in May

May, the last month of the spring in Peru, is an agreeable month, with an average temperature varying between 70.5°F (21.4°C) and 53.6°F (12°C). The shift into May is characterized by a rise in the average high-temperature, transitioning from April's mild 58.8°F (14.9°C) to a pleasant 70.5°F (21.4°C). Weather in May »

Weather in June

June, the first month of the summer in Peru, is a moderately hot month, with an average temperature fluctuating between 78.8°F (26°C) and 61.5°F (16.4°C). As Peru welcomes June, the average high-temperature sees a modest rise, transitioning from an agreeable 70.5°F (21.4°C) in May to a moderately hot 78.8°F (26°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Peru, Illinois, with an average temperature varying between 64.2°F (17.9°C) and 80.6°F (27°C). Peru reaches its highest average temperatures in July, measuring 80.6°F (27°C) at the peak and 64.2°F (17.9°C) at the lowest. The heat index value during July is computed to be a hot 86°F (30°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Peru, Illinois, with an average temperature ranging between max 79.5°F (26.4°C) and min 62.1°F (16.7°C). As August unfolds, the average high-temperature reaches a still warm 79.5°F (26.4°C), hinting at a slight fluctuation from the previous month. Weather in August »

Weather in September

September, the first month of the autumn in Peru, is also a moderately hot month, with an average temperature fluctuating between 56.1°F (13.4°C) and 74.5°F (23.6°C). Peru's weather in September displays an average high-temperature of a still moderately hot 74.5°F (23.6°C), showing minor disparity from August's 79.5°F (26.4°C). Weather in September »

Weather in October

October, like September, in Peru, Illinois, is another comfortable autumn month, with temperature in the range of an average high of 61.7°F (16.5°C) and an average low of 45.7°F (7.6°C). During the transition into October, Peru observes a decrease in the average high-temperature, falling from a moderately hot 74.5°F (23.6°C) in September to a comfortable 61.7°F (16.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Peru, Illinois, with an average temperature ranging between min 33.8°F (1°C) and max 46.8°F (8.2°C). November's arrival sees a clear drop in the average high-temperature, decreasing from October's comfortable 61.7°F (16.5°C) to a chilly 46.8°F (8.2°C). Weather in November »

Weather in December

December, the first month of the winter in Peru, is also a wintry month, with temperature in the range of an average high of 34.9°F (1.6°C) and an average low of 24.6°F (-4.1°C). Peru, Illinois, in December undergoes a mild reduction in the average high-temperature, shifting from November's frosty 46.8°F (8.2°C) to a wintry 34.9°F (1.6°C). Weather in December »
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Frequently asked questions

What are the coldest months in Peru?

January, having an average high-temperature of 28.9°F (-1.7°C) and an average low-temperature of 16.9°F (-8.4°C), is the coldest month.

How many days does it rain in Peru?

Throughout the year, there are 151.4 rainfall days, and 30.67" (779mm) of precipitation is accumulated.

When does it snow in Peru?

January through April, October through December are months with snowfall in Peru.

What is the snowiest month in Peru?

The month with the most snowfall is January, when snow falls for 12.1 days and typically aggregates up to 4.37" (111mm) of snow.

How much does it snow in Peru?

Throughout the year, in Peru, there are 40.5 snowfall days, and 15.16" (385mm) of snow is accumulated.

What is the month with the least sunshine in Peru?

With an average of 3.9h of sunshine, January has the least sunshine of the year in Peru, Illinois.

What are the months with the lowest UV index in Peru?

The months with the lowest UV index in Peru are January and December, with an average maximum UV index of 1.

What is the driest month in Peru?

The month with the least rainfall is February, when the rain falls for 6.1 days and typically collects 1.57" (40mm) of precipitation.

When is Daylight Saving Time (DST) in Peru?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Peru, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.

What is the rainiest month in Peru?

The month with the most rainfall is May, when the rain falls for 18.5 days and typically aggregates up to 4.65" (118mm) of precipitation.

When it does not snow in Peru?

In Peru, snow does not fall in May through September.

When are the longest days in Peru?

With an average of 15h and 6min of daylight, June has the longest days of the year in Peru, Illinois.

What month has the most sunshine in Peru?

The month with the most sunshine in Peru is June, with an average of 9.8h of sunshine.

When is the highest UV index in Peru?

June and July, with an average maximum UV index of 6, are months with the highest UV index.

What time of the year is the hottest in Peru?

July is the warmest month in Peru, Illinois, with an average high-temperature of 80.6°F (27°C) and an average low-temperature of 64.2°F (17.9°C).

What is the most humid month in Peru?

July is the most humid month in Peru, with an average relative humidity of 85%.

What is the least humid month in Peru?

The least humid month in Peru, Illinois, is October, with an average relative humidity of 72%.

What is the month with the shortest days in Peru?

With an average of 9h and 18min of daylight, December has the shortest days of the year.

Average temperature
Peru, IL

Average temperature - Peru, IL

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (28.9°F).

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).

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Average pressure
Peru, IL

Average pressure - Peru, IL

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed
Peru, IL

Average wind speed - Peru, IL

The windiest months (with the highest average wind speed) are January and April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).

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Average rainfall
Peru, IL

Average rainfall - Peru, IL

The wettest month (with the highest rainfall) is May (4.65").
The driest month (with the least rainfall) is February (1.57").

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Average rainfall days
Peru, IL

Average rainfall days - Peru, IL

The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is January (5.5 days).

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Average snowfall
Peru, IL

Average snowfall - Peru, IL

The month with the highest snowfall is January (4.37").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Peru, IL

Average snowfall days - Peru, IL

The month with the highest number of snowfall days is January (12.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight / Average sunshine
Peru, IL

Average daylight / Average sunshine - Peru, IL

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days
Peru, IL

Average sunshine days - Peru, IL

The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is May (10.4 days).

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Average visibility
Peru, IL

Average visibility - Peru, IL

The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).

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Peru, Illinois, USA

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