Climate and monthly weather forecast
Saint Jacob, IL

Weather in January

January, the same as December, is a wintry winter month in Saint Jacob, Illinois, with temperature in the range of an average low of 23.7°F (-4.6°C) and an average high of 36.9°F (2.7°C). January is the coldest month, with an average high-temperature of 36.9°F (2.7°C) and an average low-temperature of 23.7°F (-4.6°C). Weather in January »

Weather in February

The last month of the winter, February, is another cold month in Saint Jacob, Illinois, with an average temperature varying between 41.5°F (5.3°C) and 27.3°F (-2.6°C). In February, the average high-temperature is almost the same as in January - a still cold 41.5°F (5.3°C). Weather in February »

Weather in March

March, the first month of the spring in Saint Jacob, is a cool month, with an average temperature ranging between min 37.2°F (2.9°C) and max 53.4°F (11.9°C). In Saint Jacob, the average high-temperature in March increases from a cold 41.5°F (5.3°C) in February to a cool 53.4°F (11.9°C). Weather in March »

Weather in April

April is an enjoyable spring month in Saint Jacob, Illinois, with an average temperature fluctuating between 47.3°F (8.5°C) and 64.2°F (17.9°C). In Saint Jacob, the average high-temperature in April increases from a cool 53.4°F (11.9°C) in March to a comfortable 64.2°F (17.9°C). Weather in April »

Weather in May

May, the last month of the spring in Saint Jacob, is a warm month, with an average temperature varying between 57.4°F (14.1°C) and 74.3°F (23.5°C). In Saint Jacob, the average high-temperature in May increases from a comfortable 64.2°F (17.9°C) in April to a warm 74.3°F (23.5°C). Weather in May »

Weather in June

June, the first month of the summer in Saint Jacob, is still a warm month, with temperature in the range of an average low of 66.2°F (19°C) and an average high of 83.1°F (28.4°C). In Saint Jacob, Illinois, the average high-temperature in June marginally rises from 74.3°F (23.5°C) in May to a still warm 83.1°F (28.4°C). Weather in June »

Weather in July

July, like June, in Saint Jacob, Illinois, is a moderately hot summer month, with an average temperature fluctuating between 67.6°F (19.8°C) and 84.9°F (29.4°C). With an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 67.6°F (19.8°C), July is the warmest month. In July, the average heat index is evaluated at a torrid 96.8°F (36°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Saint Jacob, Illinois, with an average temperature varying between 83.7°F (28.7°C) and 65.8°F (18.8°C). In August, the average high-temperature is practically the same as in July - a still warm 83.7°F (28.7°C). Weather in August »

Weather in September

September, the first month of the autumn in Saint Jacob, is also a moderately hot month, with temperature in the range of an average high of 78.1°F (25.6°C) and an average low of 59.7°F (15.4°C). In September, the average high-temperature slightly decreases from a warm 83.7°F (28.7°C) in August to a still moderately hot 78.1°F (25.6°C). Weather in September »

Weather in October

October, like September, in Saint Jacob, Illinois, is another comfortable autumn month, with an average temperature fluctuating between 65.7°F (18.7°C) and 48.9°F (9.4°C). In October, the average high-temperature drops from a warm 78.1°F (25.6°C) in September to an enjoyable 65.7°F (18.7°C). Weather in October »

Weather in November

November, the last month of the autumn in Saint Jacob, is also a fresh month, with an average temperature fluctuating between 52.3°F (11.3°C) and 37.4°F (3°C). In Saint Jacob, the average high-temperature in November decreases from a comfortable 65.7°F (18.7°C) in October to a cool 52.3°F (11.3°C). Weather in November »

Weather in December

December, the first month of the winter in Saint Jacob, is still a cold month, with an average temperature ranging between max 41.5°F (5.3°C) and min 30°F (-1.1°C). In December, the average high-temperature drops from a cool 52.3°F (11.3°C) in November to a cold 41.5°F (5.3°C). Weather in December »
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FAQ

What is the coldest month in Saint Jacob?

The coldest month in Saint Jacob is January, with an average high-temperature of 36.9°F (2.7°C) and an average low-temperature of 23.7°F (-4.6°C).

How much does it rain in Saint Jacob?

In Saint Jacob, during the entire year, the rain falls for 110.6 days and collects up to 12.01" (305mm) of precipitation.

When does it snow in Saint Jacob?

Months with snowfall in Saint Jacob are January through March, October through December.

How many days does it snow in Saint Jacob?

In Saint Jacob, during the entire year, snow falls for 15.9 days and aggregates up to 2.32" (59mm) of snow.

What is the month with the least sunshine in Saint Jacob?

The months with the least sunshine in Saint Jacob, Illinois, are January and February, with an average of 4.6h of sunshine.

What is the month with the lowest UV index in Saint Jacob?

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

What is the driest month in Saint Jacob?

The month with the least rainfall in Saint Jacob, Illinois, is February, when the rain falls for 6.1 days and typically collects 0.55" (14mm) of precipitation.

When is Daylight Saving Time (DST) in Saint Jacob?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Saint Jacob, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from CDT to CST.

When it does not snow in Saint Jacob?

April through September are months without snowfall in Saint Jacob.

What is the rainiest month in Saint Jacob?

May is the month with the most rainfall in Saint Jacob. Rain falls for 13.1 days and accumulates 1.46" (37mm) of precipitation.

What are the months with the highest UV index in Saint Jacob?

May through August, with an average maximum UV index of 6, are months with the highest UV index in Saint Jacob, Illinois.

When are the longest days in Saint Jacob?

June has the longest days of the year in Saint Jacob, with an average of 14h and 50min of daylight.

What month has the most sunshine in Saint Jacob?

The month with the most sunshine in Saint Jacob is June, with an average of 10.6h of sunshine.

What is the warmest month in Saint Jacob?

The warmest month in Saint Jacob, Illinois, is July, with an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 67.6°F (19.8°C).

What is the most humid month in Saint Jacob?

The months with the highest humidity in Saint Jacob are July and August, with an average relative humidity of 80%.

What is the least humid month in Saint Jacob?

With an average relative humidity of 71%, October is the least humid month in Saint Jacob, Illinois.

What is the snowiest month in Saint Jacob?

December is the month with the most snowfall in Saint Jacob. Snow falls for 3.1 days and accumulates 0.94" (24mm) of snow.

What is the month with the shortest days in Saint Jacob?

The month with the shortest days is December, with an average of 9h and 31min of daylight.

Average temperature
Saint Jacob, IL

Average temperature - Saint Jacob, IL

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (36.9°F).

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).

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Average pressure
Saint Jacob, IL

Average pressure - Saint Jacob, IL

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed
Saint Jacob, IL

Average wind speed - Saint Jacob, IL

The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

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Average humidity
Saint Jacob, IL

Average humidity - Saint Jacob, IL

The months with the highest relative humidity are July and August (80%).
The month with the lowest relative humidity is October (71%).

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Average rainfall
Saint Jacob, IL

Average rainfall - Saint Jacob, IL

The wettest month (with the highest rainfall) is May (1.46").
The driest month (with the least rainfall) is February (0.55").

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Average rainfall days
Saint Jacob, IL

Average rainfall days - Saint Jacob, IL

The month with the highest number of rainy days is May (13.1 days).
The months with the least rainy days are January and December (5.9 days).

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Average snowfall
Saint Jacob, IL

Average snowfall - Saint Jacob, IL

The month with the highest snowfall is December (0.94").
The months with the least snowfall are April, May, June, July, August and September (0").

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Average snowfall days
Saint Jacob, IL

Average snowfall days - Saint Jacob, IL

The months with the highest number of snowfall days are January and February (4.8 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
Saint Jacob, IL

Average daylight / Average sunshine - Saint Jacob, IL

The month with the longest days is June (Average daylight: 14h and 50min).
The month with the shortest days is December (Average daylight: 9h and 31min).

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).

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Average sunshine days
Saint Jacob, IL

Average sunshine days - Saint Jacob, IL

The month with the most sunshine days is December (21.8 days).
The month with the least sunshine days is July (14.5 days).

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Average UV index
Saint Jacob, IL

Average UV index - Saint Jacob, IL

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

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Average cloud cover
Saint Jacob, IL

Average cloud cover - Saint Jacob, IL

The months with the most cloud cover are January and February (Cloud cover 50).
The months with the least cloud cover are June, July, August and September (Cloud cover 28).

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Average visibility
Saint Jacob, IL

Average visibility - Saint Jacob, 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).

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