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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is a freezing cold winter month in Peru, Illinois, with an average temperature varying between 28.9°F (-1.7°C) and 16.9°F (-8.4°C). The coldest month is January, with an average high-temperature of 28.9°F (-1.7°C) and an average low-temperature of 16.9°F (-8.4°C). Weather in January »
Weather in February
The last month of the winter, February, is a cold month in Peru, Illinois, with an average temperature varying between 33.4°F (0.8°C) and 20.5°F (-6.4°C). Peru experiences a subtle adjustment in high-temperatures to an icy 33.4°F (0.8°C) with the onset of February, maintaining near parity with January's 28.9°F (-1.7°C). Weather in February »
Weather in March
March, the first month of the spring in Peru, is a chilly month, with an average temperature varying between 32.4°F (0.2°C) and 46.8°F (8.2°C). Peru in March sees a temperature change, with average high-temperatures moving from a wintry 33.4°F (0.8°C) in February to a frosty 46.8°F (8.2°C). Weather in March »
Weather in April
April is a mild spring month in Peru, Illinois, with an average temperature ranging between max 58.8°F (14.9°C) and min 42.4°F (5.8°C). April marks a rise in the average high-temperature, moving from March's frosty 46.8°F (8.2°C) to a refreshing 58.8°F (14.9°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Peru, Illinois, with temperature in the range of an average high of 70.5°F (21.4°C) and an average low of 53.6°F (12°C). Peru's weather in May shows a rise in the average high-temperature, moving up from April's moderate 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 warm month, with an average temperature varying between 78.8°F (26°C) and 61.5°F (16.4°C). As Peru transitions into June, a marginal rise in the average high-temperature is observed, moving from a pleasant 70.5°F (21.4°C) in May to a warm 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 temperature in the range of an average low of 64.2°F (17.9°C) and an average high of 80.6°F (27°C). With an average high-temperature of 80.6°F (27°C) and an average low-temperature of 64.2°F (17.9°C), July is the warmest month. The heat index for July is appraised at 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 fluctuating between 79.5°F (26.4°C) and 62.1°F (16.7°C). August's onset records an average high-temperature of a still moderately hot 79.5°F (26.4°C), a near match to July's 80.6°F (27°C). Weather in August »
Weather in September
September, the first month of the autumn in Peru, is still a warm month, with temperature in the range of an average high of 74.5°F (23.6°C) and an average low of 56.1°F (13.4°C). As September takes its course, Peru's average high-temperature registers at a still moderately hot 74.5°F (23.6°C), closely aligning with the preceding month. Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Peru, Illinois, with an average temperature fluctuating between 45.7°F (7.6°C) and 61.7°F (16.5°C). Onset of October witnesses a reduction in the average high-temperature, falling from a warm 74.5°F (23.6°C) in September to a comfortable 61.7°F (16.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Peru, is another chilly month, with an average temperature varying between 33.8°F (1°C) and 46.8°F (8.2°C). Peru's November weather is marked by a distinct drop in high-temperatures, declining from a refreshing 61.7°F (16.5°C) in October to a frosty 46.8°F (8.2°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Peru, Illinois, with an average temperature fluctuating between 34.9°F (1.6°C) and 24.6°F (-4.1°C). Welcoming December, Peru observes a shift in the average high-temperature, falling from November's chilly 46.8°F (8.2°C) to a wintry 34.9°F (1.6°C). Weather in December »
Updated: Jul 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
In Peru, January is the coldest month, with temperatures averaging a high of 28.9°F (-1.7°C) and a low of 16.9°F (-8.4°C).
How much does it rain?
Throughout the year, there are 151.4 rainfall days, and 30.67" (779mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through April, October through December.
When does it snow the most?
January is the month with the most snowfall in Peru. Snow falls for 12.1 days and accumulates 4.37" (111mm) of snow.
How many days does it snow?
In Peru, during the entire year, snow falls for 40.5 days and aggregates up to 15.16" (385mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 3.9h of sunshine.
What are the months with the lowest UV index?
January and December, with an average maximum UV index of 1, are months with the lowest UV index.
What is the driest month in Peru?
February is the month with the least rainfall. Rain falls for 6.1 days and accumulates 1.57" (40mm) of precipitation.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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?
May is the month with the most rainfall. Rain falls for 18.5 days and accumulates 4.65" (118mm) of precipitation.
When it does not snow?
May through September are months without snowfall.
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.
What month has the most sunshine?
With an average of 9.8h of sunshine, June has the most sunshine of the year.
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 is the warmest month?
The warmest month is July, 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?
With an average relative humidity of 85%, July is the most humid month.
What is the least humid month?
October is the least humid month in Peru, with an average relative humidity of 72%.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 18min of daylight.
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).
Average pressure
Peru, IL
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Peru, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.2mph - Average wind speed in March:
9.9mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.8mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7.4mph - Average wind speed in October:
9.2mph - Average wind speed in November:
9.9mph - Average wind speed in December:
9.6mph
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).
Average humidity
Peru, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Peru, IL
- Average rainfall in January:
1.65" - Average rainfall in February:
1.57" - Average rainfall in March:
2.13" - Average rainfall in April:
3.78" - Average rainfall in May:
4.65" - Average rainfall in June:
3.31"
- Average rainfall in July:
2.8" - Average rainfall in August:
2.28" - Average rainfall in September:
2.28" - Average rainfall in October:
2.83" - Average rainfall in November:
1.77" - Average rainfall in December:
1.61"
The wettest month (with the highest rainfall) is May (4.65").
The driest month (with the least rainfall) is February (1.57").
Average rainfall days
Peru, IL
- Average rainfall days in January:
5.5 days - Average rainfall days in February:
6.1 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
16.7 days - Average rainfall days in May:
18.5 days - Average rainfall days in June:
17.8 days
- Average rainfall days in July:
17.1 days - Average rainfall days in August:
15 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
12.5 days - Average rainfall days in November:
10.1 days - Average rainfall days in December:
7.8 days
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).
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").
Average snowfall days
Peru, IL
- Average snowfall days in January:
12.1 days - Average snowfall days in February:
9.8 days - Average snowfall days in March:
5.8 days - Average snowfall days in April:
1.8 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.4 days - Average snowfall days in November:
3.1 days - Average snowfall days in December:
7.5 days
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).
Average daylight / Average sunshine
Peru, IL
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 2min
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).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
4h and 0min - Average sunshine in March:
6h and 2min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
9h and 4min - Average sunshine in August:
9h and 4min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 1min
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).
Average sunshine days
Peru, IL
- Average sunshine days in January:
13.8 days - Average sunshine days in February:
12.9 days - Average sunshine days in March:
13.2 days - Average sunshine days in April:
10.8 days - Average sunshine days in May:
10.4 days - Average sunshine days in June:
10.7 days
- Average sunshine days in July:
11.3 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
15.2 days - Average sunshine days in October:
16.1 days - Average sunshine days in November:
17.4 days - Average sunshine days in December:
16.3 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is May (10.4 days).
Average UV index
Peru, IL
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Peru, IL
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).
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).
Peru, Illinois, USA
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