Climate and monthly weather forecast
Naples, IL

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Weather in January

January, the same as December, is another cold winter month in Naples, Illinois, with an average temperature fluctuating between 33.8°F (1°C) and 21.6°F (-5.8°C). January, on average, is the coldest month, registering a high temperature of 33.8°F (1°C) and a low of 21.6°F (-5.8°C). Weather in January »

Weather in February

The last month of the winter, February, is also an icy month in Naples, Illinois, with an average temperature varying between 25.2°F (-3.8°C) and 38.8°F (3.8°C). Naples's shift from January to February is accompanied by an average high-temperature of a still cold 38.8°F (3.8°C), a slight deviation from 33.8°F (1°C). Weather in February »

Weather in March

March, the first month of the spring in Naples, is a cool month, with an average temperature varying between 51.8°F (11°C) and 36.1°F (2.3°C). March brings a rise in Naples's average high-temperature, moving from a wintry 38.8°F (3.8°C) in February to a cool 51.8°F (11°C). Weather in March »

Weather in April

April in Naples, Illinois, is a comfortable spring month, with temperature in the range of an average low of 46°F (7.8°C) and an average high of 63.5°F (17.5°C). With the onset of April, Naples experiences a temperature shift, with the average high-temperature moving from a cool 51.8°F (11°C) in March to a comfortable 63.5°F (17.5°C). Weather in April »

Weather in May

May, the last month of the spring in Naples, is an agreeable month, with an average temperature fluctuating between 73°F (22.8°C) and 55.9°F (13.3°C). Naples's weather in May shows a rise in the average high-temperature, moving up from April's enjoyable 63.5°F (17.5°C) to a pleasant 73°F (22.8°C). Weather in May »

Weather in June

June, the first month of the summer in Naples, is a moderately hot month, with an average temperature fluctuating between 81.9°F (27.7°C) and 64.4°F (18°C). As Naples welcomes June, the average high-temperature sees a modest rise, transitioning from a pleasant 73°F (22.8°C) in May to a moderately hot 81.9°F (27.7°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Naples, Illinois, with an average temperature varying between 66.7°F (19.3°C) and 84°F (28.9°C). In Naples, the highest average temperatures are observed in July, with a high of 84°F (28.9°C) and a low of 66.7°F (19.3°C). The heat index value for July is appraised at a fiery hot 95°F (35°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Naples, Illinois, with an average temperature fluctuating between 64.9°F (18.3°C) and 83.5°F (28.6°C). In August, Naples notes an average high-temperature of a still moderately hot 83.5°F (28.6°C), hardly different from the preceding month. Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Naples, Illinois, with an average temperature varying between 78.1°F (25.6°C) and 58.8°F (14.9°C). Naples's weather subtly changes with the onset of September, barely falling from 83.5°F (28.6°C) in August to a still moderately hot 78.1°F (25.6°C). Weather in September »

Weather in October

October, like September, in Naples, Illinois, is another enjoyable autumn month, with an average temperature varying between 64.2°F (17.9°C) and 47.3°F (8.5°C). Naples in October experiences a subtle temperature decline, with average high-temperatures reducing from a moderately hot 78.1°F (25.6°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 Naples, is also a fresh month, with an average temperature varying between 51.1°F (10.6°C) and 36.3°F (2.4°C). The shift from October to November involves a decrease in the average high-temperature, from a refreshing 64.2°F (17.9°C) to a fresh 51.1°F (10.6°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Naples, Illinois, with an average temperature varying between 27.9°F (-2.3°C) and 39.2°F (4°C). As November transitions to December, the average high-temperature falls from a fresh 51.1°F (10.6°C) to a wintry 39.2°F (4°C). Weather in December »
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the coldest in Naples?

During the coldest month in Naples, January, temperatures average a high of 33.8°F (1°C) and a low of 21.6°F (-5.8°C).

What is the driest month in Naples?

The months with the least rainfall in Naples are January, February and December Rain falls for 7.5 days and accumulates 1.73" (44mm) of rain.

How much does it rain in Naples?

In Naples, during the entire year, the rain falls for 155.4 days and collects up to 31.69" (805mm) of precipitation.

When does it snow in Naples?

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

What is the snowiest month in Naples?

January is the month with the most snowfall. Snow falls for 9.8 days and accumulates 3.46" (88mm) of snow.

How many days does it snow in Naples?

Throughout the year, in Naples, Illinois, there are 30.2 snowfall days, and 10.75" (273mm) of snow is accumulated.

What is the month with the least sunshine in Naples?

January has the least sunshine of the year in Naples, Illinois, with an average of 4.3h of sunshine.

What is the month with the lowest UV index in Naples?

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

When is Daylight Saving Time (DST) in Naples?

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 wettest month in Naples?

May is the month with the most rainfall in Naples, Illinois. Rain falls for 18.8 days and accumulates 4.02" (102mm) of precipitation.

When it does not snow in Naples?

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

When are the longest days in Naples?

With an average of 14h and 54min of daylight, June has the longest days of the year.

What month has the most sunshine in Naples?

June has the most sunshine of the year in Naples, with an average of 10.3h of sunshine.

What are the months with the highest UV index in Naples?

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

What are the warmest months in Naples?

In Naples, temperatures reach their average annual highs in July, measuring 84°F (28.9°C) and a minimum average of 66.7°F (19.3°C).

What is the most humid month in Naples?

July is the most humid month, with an average relative humidity of 82%.

What is the least humid month in Naples?

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

What is the month with the shortest days in Naples?

The month with the shortest days is December, with an average of 9h and 24min of daylight.

Average temperature
Naples, IL

Average temperature - Naples, IL

The warmest month (with the highest average high temperature) is July (84°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
Naples, IL

Average pressure - Naples, 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
Naples, IL

Average wind speed - Naples, IL

The windiest months (with the highest average wind speed) are January and April (9.9mph).
The calmest month (with the lowest average wind speed) is July (6mph).

Average rainfall
Naples, IL

Average rainfall - Naples, IL

The wettest month (with the highest rainfall) is May (4.02").
The driest months (with the least rainfall) are January, February and December (1.73").

Average rainfall days
Naples, IL

Average rainfall days - Naples, IL

The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (7.2 days).

Average snowfall
Naples, IL

Average snowfall - Naples, IL

The month with the highest snowfall is January (3.46").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days
Naples, IL

Average snowfall days - Naples, IL

The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine
Naples, IL

Average daylight / Average sunshine - Naples, 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 month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

Average sunshine days
Naples, IL

Average sunshine days - Naples, IL

The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is June (8.6 days).

Average UV index
Naples, IL

Average UV index - Naples, 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
Naples, IL

Average cloud cover - Naples, 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 30).

Average visibility
Naples, IL

Average visibility - Naples, IL

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

Naples, Illinois, USA

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