Climate and monthly weather forecast
Pecatonica, IL

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Weather in January

January, like December, is another subzero cold winter month in Pecatonica, Illinois, with an average temperature ranging between max 26.2°F (-3.2°C) and min 14°F (-10°C). January, having an average high-temperature of 26.2°F (-3.2°C) and an average low-temperature of 14°F (-10°C), is the coldest month. Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Pecatonica, Illinois, with temperature in the range of an average high of 30.4°F (-0.9°C) and an average low of 17.4°F (-8.1°C). Upon the onset of February, Pecatonica witnesses an average high-temperature of a still subzero cold 30.4°F (-0.9°C), showing a close resemblance to the prior month. Weather in February »

Weather in March

The first month of the spring, March, is a chilly month in Pecatonica, Illinois, with an average temperature ranging between max 44.2°F (6.8°C) and min 29.8°F (-1.2°C). With the onset of March, the average high-temperature slightly shifts from February's freezing cold 30.4°F (-0.9°C) to a frosty 44.2°F (6.8°C). Weather in March »

Weather in April

April is a moderate spring month in Pecatonica, Illinois, with an average temperature ranging between max 56.3°F (13.5°C) and min 39.7°F (4.3°C). April brings a temperature increase, with average high-temperatures moving from March's frosty 44.2°F (6.8°C) to a refreshing 56.3°F (13.5°C). Weather in April »

Weather in May

May, the last month of the spring in Pecatonica, is an agreeable month, with an average temperature fluctuating between 51.3°F (10.7°C) and 68.5°F (20.3°C). With the beginning of May, Pecatonica's average high-temperature sees an increase, transitioning from a mild 56.3°F (13.5°C) in April to a pleasant 68.5°F (20.3°C). Weather in May »

Weather in June

June, the first month of the summer in Pecatonica, is a warm month, with an average temperature varying between 60.1°F (15.6°C) and 77.2°F (25.1°C). June's arrival brings a slight change in high-temperatures, adjusting from a pleasant 68.5°F (20.3°C) in May to a moderately hot 77.2°F (25.1°C). Weather in June »

Weather in July

July, like June, in Pecatonica, Illinois, is another warm summer month, with an average temperature fluctuating between 79.9°F (26.6°C) and 63.1°F (17.3°C). July brings the highest temperatures, with an average high of 79.9°F (26.6°C) and an average low of 63.1°F (17.3°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Pecatonica, Illinois, with an average temperature fluctuating between 78.1°F (25.6°C) and 60.6°F (15.9°C). Pecatonica marks the start of August with an average high-temperature of a still warm 78.1°F (25.6°C), hinting at a slight fluctuation from July's 79.9°F (26.6°C). Weather in August »

Weather in September

September, the first month of the autumn in Pecatonica, is also an agreeable month, with an average temperature ranging between max 72.7°F (22.6°C) and min 54.3°F (12.4°C). The arrival of September suggests a slight decrease in the average high-temperature, moving from a moderately hot 78.1°F (25.6°C) in August to an agreeable 72.7°F (22.6°C). Weather in September »

Weather in October

October, like September, is another refreshing autumn month in Pecatonica, Illinois, with temperature in the range of an average low of 43.7°F (6.5°C) and an average high of 59.5°F (15.3°C). The onset of October results in a decrease in the average high-temperature, receding from an agreeable 72.7°F (22.6°C) in September to a refreshing 59.5°F (15.3°C). Weather in October »

Weather in November

November, the last month of the autumn in Pecatonica, is another chilly month, with an average temperature fluctuating between 31.8°F (-0.1°C) and 44.8°F (7.1°C). Pecatonica's weather undergoes a significant change with the arrival of November, as the average high-temperature drops from a mild 59.5°F (15.3°C) in October to a chilly 44.8°F (7.1°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Pecatonica, Illinois, with an average temperature ranging between max 32.5°F (0.3°C) and min 22.5°F (-5.3°C). With December's arrival, Pecatonica, Illinois, sees a decrease in average high-temperatures, moving from a chilly 44.8°F (7.1°C) in November to an icy 32.5°F (0.3°C). Weather in December »
Updated: Jul 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest time of year in Pecatonica?

January is the coldest month, with an average high-temperature of 26.2°F (-3.2°C) and an average low-temperature of 14°F (-10°C).

What is the most humid month?

The most humid month is January, with an average relative humidity of 86%.

What is the driest month?

The months with the least rainfall are January and February Rain falls for 3.2 days and accumulates 0.35" (9mm) of rain.

How much does it rain?

In Pecatonica, during the entire year, the rain falls for 100.6 days and collects up to 7.99" (203mm) of precipitation.

When does it snow?

Months with snowfall are January through April, October through December.

When does it snow the most?

The month with the most snowfall is January, when snow falls for 8.1 days and typically aggregates up to 1.42" (36mm) of snow.

How many days does it snow?

Throughout the year, there are 29.5 snowfall days, and 3.66" (93mm) of snow is accumulated.

What is the month with the least sunshine?

January has the least sunshine of the year, with an average of 3.7h of sunshine.

What is the month with the lowest UV index?

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

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 least humid month?

The months with the lowest humidity are April and October, with an average relative humidity of 75%.

What is the wettest month?

The month with the most rainfall is May, when the rain falls for 13.8 days and typically aggregates up to 1.18" (30mm) of precipitation.

When it does not snow?

May through September are months without snowfall.

When are the longest days in Pecatonica?

June has the longest days of the year, with an average of 15h and 12min of daylight.

What month is the hottest?

In Pecatonica, July is the month with the highest recorded average temperatures, measuring a high of 79.9°F (26.6°C) and a low of 63.1°F (17.3°C).

What month has the most sunshine?

July has the most sunshine of the year, with an average of 9.8h of sunshine.

What is the month with the highest UV index in Pecatonica?

July is the month with the highest UV index, with an average maximum UV index of 6.

What is the month with the shortest days?

With an average of 9h and 6min of daylight, December has the shortest days of the year.

Average temperature
Pecatonica, IL

Average temperature - Pecatonica, IL

The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (26.2°F).

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14°F).

Average pressure
Pecatonica, IL

Average pressure - Pecatonica, IL

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed
Pecatonica, IL

Average wind speed - Pecatonica, IL

The windiest month (with the highest average wind speed) is April (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

Average humidity
Pecatonica, IL

Average humidity - Pecatonica, IL

The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April and October (75%).

Average rainfall
Pecatonica, IL

Average rainfall - Pecatonica, IL

The wettest month (with the highest rainfall) is May (1.18").
The driest months (with the least rainfall) are January and February (0.35").

Average rainfall days
Pecatonica, IL

Average rainfall days - Pecatonica, IL

The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is January (3.2 days).

Average snowfall
Pecatonica, IL

Average snowfall - Pecatonica, IL

The month with the highest snowfall is January (1.42").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days
Pecatonica, IL

Average snowfall days - Pecatonica, IL

The month with the highest number of snowfall days is January (8.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine
Pecatonica, IL

Average daylight / Average sunshine - Pecatonica, IL

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days
Pecatonica, IL

Average sunshine days - Pecatonica, IL

The month with the most sunshine days is December (22.6 days).
The month with the least sunshine days is June (12.8 days).

Average visibility
Pecatonica, IL

Average visibility - Pecatonica, 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).

Pecatonica, Illinois, USA

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