Climate and monthly weather forecast
Perry, IL

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Weather in January

January, like December, in Perry, Illinois, is an icy winter month, with an average temperature fluctuating between 33.8°F (1°C) and 21.6°F (-5.8°C). Perry's temperature records reveal January as the coldest month, marked by average highs of 33.8°F (1°C) and lows of 21.6°F (-5.8°C). Weather in January »

Weather in February

February, the last month of the winter in Perry, is also an icy month, with an average temperature fluctuating between 38.8°F (3.8°C) and 25°F (-3.9°C). The advent of February observes an average high-temperature of a still icy 38.8°F (3.8°C), nearly identical to January's 33.8°F (1°C). Weather in February »

Weather in March

March, the first month of the spring in Perry, is a cool month, with an average temperature ranging between min 36°F (2.2°C) and max 51.4°F (10.8°C). Entering March, Perry sees a temperature rise, with the average high-temperature advancing from February's cold 38.8°F (3.8°C) to a cool 51.4°F (10.8°C). Weather in March »

Weather in April

April is a refreshing spring month in Perry, Illinois, with temperature in the range of an average high of 63.5°F (17.5°C) and an average low of 46°F (7.8°C). Perry sees an increase in average high-temperatures during April, moving from a cool 51.4°F (10.8°C) in March to an enjoyable 63.5°F (17.5°C). Weather in April »

Weather in May

May, the last month of the spring in Perry, is a pleasant month, with an average temperature fluctuating between 72.3°F (22.4°C) and 55.8°F (13.2°C). Perry's May weather indicates a minor increase in high-temperatures, edging from April's enjoyable 63.5°F (17.5°C) to a pleasant 72.3°F (22.4°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Perry, Illinois, with temperature in the range of an average high of 82°F (27.8°C) and an average low of 64.6°F (18.1°C). Perry sees a rise in temperature during June, with average high-temperatures transitioning from a pleasant 72.3°F (22.4°C) in May to a moderately hot 82°F (27.8°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Perry, Illinois, with an average temperature fluctuating between 66.7°F (19.3°C) and 84.4°F (29.1°C). The warmest month is July, with an average high-temperature of 84.4°F (29.1°C) and an average low-temperature of 66.7°F (19.3°C). July's average heat index is estimated at a very hot 95°F (35°C). Weather in July »

Weather in August

August, the last month of the summer in Perry, is another warm month, with an average temperature fluctuating between 83.5°F (28.6°C) and 65.5°F (18.6°C). With the transition into August, Perry notes an average high-temperature of a still warm 83.5°F (28.6°C), closely resembling July. Weather in August »

Weather in September

September, the first month of the autumn in Perry, is also a moderately hot month, with an average temperature ranging between min 58.6°F (14.8°C) and max 78.3°F (25.7°C). The advent of September brings an average high-temperature of a still moderately hot 78.3°F (25.7°C), exhibiting minor difference from the previous month. Weather in September »

Weather in October

October, like September, in Perry, Illinois, is another comfortable autumn month, with an average temperature fluctuating between 47.3°F (8.5°C) and 64.2°F (17.9°C). In Perry, the average high-temperature in October drops from a warm 78.3°F (25.7°C) in September to a refreshing 64.2°F (17.9°C). Weather in October »

Weather in November

November, the last month of the autumn in Perry, is also a fresh month, with an average temperature ranging between max 50.9°F (10.5°C) and min 36.3°F (2.4°C). As November begins, there is a decrease in the average high-temperature, falling from a comfortable 64.2°F (17.9°C) in October to a fresh 50.9°F (10.5°C). Weather in November »

Weather in December

December, the first month of the winter in Perry, is also an icy month, with temperature in the range of an average low of 27.9°F (-2.3°C) and an average high of 39°F (3.9°C). As November shifts into December, a slight alteration in temperatures is observed, with average highs reducing from a cool 50.9°F (10.5°C) to an icy 39°F (3.9°C). Weather in December »
Updated: Aug 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest?

January tends to be the coldest month, with temperatures averaging a daily high of 33.8°F (1°C) and a low of 21.6°F (-5.8°C).

How much does it rain?

Throughout the year, there are 128.8 rainfall days, and 18.35" (466mm) of precipitation is accumulated.

When does it snow?

January through April, November and December are months with snowfall.

When does it snow the most?

The month with the most snowfall is January, when snow falls for 6.3 days and typically aggregates up to 2.05" (52mm) of snow.

How much does it snow?

In Perry, during the entire year, snow falls for 21.9 days and aggregates up to 5.67" (144mm) of snow.

What is the month with the least sunshine?

January has the least sunshine of the year, with an average of 4.4h of sunshine.

What are the months with the lowest UV index?

The months with the lowest UV index in Perry are January, February, November and December, with an average maximum UV index of 2.

What is the driest month?

The month with the least rainfall is February, when the rain falls for 5.8 days and typically collects 0.75" (19mm) of precipitation.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Perry, Illinois, 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 wettest month?

The month with the most rainfall is May, when the rain falls for 16.8 days and typically aggregates up to 2.44" (62mm) of precipitation.

When it does not snow?

In Perry, snow does not fall in May through October.

What are the most humid months?

The months with the highest humidity are June and July, with an average relative humidity of 81%.

When are the longest days?

The month with the longest days is June, with an average of 14h and 54min of daylight.

What are the months with the most sunshine?

June and July, with an average of 10.3h of sunshine, are months with the most sunshine.

What are the months with the highest UV index?

The months with the highest UV index are June through August, with an average maximum UV index of 6.

What are the warmest months in Perry?

In Perry, July records the average highest temperatures, peaking at 84.4°F (29.1°C) and reaching a low of 66.7°F (19.3°C).

What is the least humid month in Perry?

The least humid month is October, with an average relative humidity of 71%.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 24min of daylight.

Average temperature
Perry, IL

Average temperature - Perry, IL

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (33.8°F).

The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

Average pressure
Perry, IL

Average pressure - Perry, IL

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed
Perry, IL

Average wind speed - Perry, IL

The windiest months (with the highest average wind speed) are January, February and April (9.8mph).
The calmest month (with the lowest average wind speed) is July (6mph).

Average humidity
Perry, IL

Average humidity - Perry, IL

The months with the highest relative humidity are June and July (81%).
The month with the lowest relative humidity is October (71%).

Average rainfall
Perry, IL

Average rainfall - Perry, IL

The wettest month (with the highest rainfall) is May (2.44").
The driest month (with the least rainfall) is February (0.75").

Average rainfall days
Perry, IL

Average rainfall days - Perry, IL

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (4.5 days).

Average snowfall
Perry, IL

Average snowfall - Perry, IL

The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days
Perry, IL

Average snowfall days - Perry, IL

The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine
Perry, IL

Average daylight / Average sunshine - Perry, IL

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

The months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

Average sunshine days
Perry, IL

Average sunshine days - Perry, IL

The month with the most sunshine days is December (20.7 days).
The month with the least sunshine days is June (12.3 days).

Average UV index
Perry, IL

Average UV index - Perry, IL

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover
Perry, IL

Average cloud cover - Perry, IL

The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are June, July, August and September (Cloud cover 29).

Average visibility
Perry, IL

Average visibility - Perry, IL

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

Perry, Illinois, USA

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