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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, in Saint Jacob, Illinois, is a wintry winter month, 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, marked by an average high-temperature of 36.9°F (2.7°C) and a low-temperature of 23.7°F (-4.6°C), is the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Saint Jacob, is also an icy month, with temperature in the range of an average high of 41.5°F (5.3°C) and an average low of 27.3°F (-2.6°C). The initiation of February sees an average high-temperature of a still wintry 41.5°F (5.3°C), showing minor variations from the previous month. Weather in February »
Weather in March
The first month of the spring, March, is a fresh month in Saint Jacob, Illinois, with an average temperature varying between 37.2°F (2.9°C) and 53.4°F (11.9°C). The start of March signals an increase in the average high-temperature, moving from a wintry 41.5°F (5.3°C) in February to a fresh 53.4°F (11.9°C). Weather in March »
Weather in April
April in Saint Jacob, Illinois, is a refreshing spring month, with an average temperature fluctuating between 47.3°F (8.5°C) and 64.2°F (17.9°C). Observing a rise in April, the average high-temperature goes from March's fresh 53.4°F (11.9°C) to an enjoyable 64.2°F (17.9°C). Weather in April »
Weather in May
The last month of the spring, May, is a moderately hot month in Saint Jacob, Illinois, with an average temperature varying between 74.3°F (23.5°C) and 57.4°F (14.1°C). An upsurge in temperatures occurs as April gives way to May, with average highs shifting from an enjoyable 64.2°F (17.9°C) to a warm 74.3°F (23.5°C). Weather in May »
Weather in June
The first month of the summer, June, is also a moderately hot month in Saint Jacob, Illinois, with an average temperature varying between 66.2°F (19°C) and 83.1°F (28.4°C). Saint Jacob's June weather indicates a minor ascent in high-temperatures, adjusting from a moderately hot 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 temperature in the range of an average high of 84.9°F (29.4°C) and an average low of 67.6°F (19.8°C). Saint Jacob's warmest weather arrives in July, when temperatures average a high of 84.9°F (29.4°C) and a low of 67.6°F (19.8°C). The heat index for July is evaluated at a very hot 96.8°F (36°C). Weather in July »
Weather in August
August, the last month of the summer in Saint Jacob, is another warm month, with an average temperature varying between 65.8°F (18.8°C) and 83.7°F (28.7°C). The advent of August sees the average high-temperature at a still moderately hot 83.7°F (28.7°C), subtly shifted from July's 84.9°F (29.4°C). Weather in August »
Weather in September
September, the first month of the autumn in Saint Jacob, is still a warm month, with temperature in the range of an average low of 59.7°F (15.4°C) and an average high of 78.1°F (25.6°C). September brings a slight decrease in temperature, down from a moderately hot 83.7°F (28.7°C) in August to a still warm 78.1°F (25.6°C). Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Saint Jacob, Illinois, with an average temperature ranging between min 48.9°F (9.4°C) and max 65.7°F (18.7°C). October comes with a decrease in the average high-temperature, falling from a warm 78.1°F (25.6°C) in September to a refreshing 65.7°F (18.7°C). Weather in October »
Weather in November
November, the last month of the autumn in Saint Jacob, is another cool month, with an average temperature fluctuating between 37.4°F (3°C) and 52.3°F (11.3°C). With the onset of November, Saint Jacob's average high-temperature adjusts, receding from October's enjoyable 65.7°F (18.7°C) to a fresh 52.3°F (11.3°C). Weather in November »
Weather in December
December, the first month of the winter in Saint Jacob, is also an icy month, with an average temperature ranging between min 30°F (-1.1°C) and max 41.5°F (5.3°C). December's onset corresponds with a shift in the average high-temperature, moving from a cool 52.3°F (11.3°C) in November to an icy 41.5°F (5.3°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest time of year in Saint Jacob?
The coldest period in Saint Jacob, Illinois, is January, when temperatures fluctuate between an average high of 36.9°F (2.7°C) and a low of 23.7°F (-4.6°C).
How many days does it rain in Saint Jacob?
In Saint Jacob, Illinois, 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 much does it snow in Saint Jacob?
In Saint Jacob, Illinois, during the entire year, snow falls for 15.9 days and aggregates up to 2.32" (59mm) of snow.
What are the months with the least sunshine in Saint Jacob?
January and February, with an average of 4.6h of sunshine, are months with the least sunshine.
What are the months with the lowest UV index in Saint Jacob?
The months with the lowest UV index in Saint Jacob, Illinois, are January, February, November and December, with an average maximum UV index of 2.
What is the driest month in Saint Jacob?
February is the month with the least rainfall in Saint Jacob. Rain falls for 6.1 days and accumulates 0.55" (14mm) of precipitation.
When is Daylight Saving Time (DST) in Saint Jacob?
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.
When it does not snow in Saint Jacob?
In Saint Jacob, Illinois, snow does not fall in April through September.
What is the wettest month in Saint Jacob?
May is the month with the most rainfall. 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?
The months with the highest UV index in Saint Jacob, Illinois, are May through August, with an average maximum UV index of 6.
When are the longest days in Saint Jacob?
The month with the longest days in Saint Jacob, Illinois, is June, with an average of 14h and 48min of daylight.
What month has the most sunshine in Saint Jacob?
June has the most sunshine of the year, with an average of 10.6h of sunshine.
What is the hottest time of year in Saint Jacob?
In Saint Jacob, July is known for its average highest temperatures, reaching a high of 84.9°F (29.4°C) and a low of 67.6°F (19.8°C).
What are the most humid months in Saint Jacob?
The months with the highest humidity in Saint Jacob, Illinois, are July and August, with an average relative humidity of 80%.
What is the least humid month in Saint Jacob?
The least humid month is October, with an average relative humidity of 71%.
What is the snowiest month in Saint Jacob?
The month with the most snowfall in Saint Jacob, Illinois, is December, when snow falls for 3.1 days and typically aggregates up to 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 30min of daylight.
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).
Average pressure
Saint Jacob, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"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:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Saint Jacob, IL
- Average wind speed in January:
9.8mph - Average wind speed in February:
9.6mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.3mph - Average wind speed in May:
7.7mph - Average wind speed in June:
6.7mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.7mph - Average wind speed in September:
6.2mph - Average wind speed in October:
8.2mph - Average wind speed in November:
8.9mph - Average wind speed in December:
8.9mph
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).
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%).
Average rainfall
Saint Jacob, IL
- Average rainfall in January:
0.91" - Average rainfall in February:
0.55" - Average rainfall in March:
0.91" - Average rainfall in April:
1.3" - Average rainfall in May:
1.46" - Average rainfall in June:
1.3"
- Average rainfall in July:
1.34" - Average rainfall in August:
1.14" - Average rainfall in September:
0.59" - Average rainfall in October:
1.02" - Average rainfall in November:
0.71" - Average rainfall in December:
0.79"
The wettest month (with the highest rainfall) is May (1.46").
The driest month (with the least rainfall) is February (0.55").
Average rainfall days
Saint Jacob, IL
- Average rainfall days in January:
5.9 days - Average rainfall days in February:
6.1 days - Average rainfall days in March:
10.2 days - Average rainfall days in April:
12 days - Average rainfall days in May:
13.1 days - Average rainfall days in June:
11.1 days
- Average rainfall days in July:
12.9 days - Average rainfall days in August:
9.7 days - Average rainfall days in September:
9.5 days - Average rainfall days in October:
7.3 days - Average rainfall days in November:
6.9 days - Average rainfall days in December:
5.9 days
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).
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").
Average snowfall days
Saint Jacob, IL
- Average snowfall days in January:
4.8 days - Average snowfall days in February:
4.8 days - Average snowfall days in March:
1.7 days - Average snowfall days in April:
0.2 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:
0.1 days - Average snowfall days in November:
1.2 days - Average snowfall days in December:
3.1 days
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).
Average daylight / Average sunshine
Saint Jacob, IL
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 3min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 4min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 1min - Average sunshine in September:
9h and 3min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 5min
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).
Average sunshine days
Saint Jacob, IL
- Average sunshine days in January:
21.3 days - Average sunshine days in February:
18.3 days - Average sunshine days in March:
17.4 days - Average sunshine days in April:
16.2 days - Average sunshine days in May:
14.8 days - Average sunshine days in June:
15.6 days
- Average sunshine days in July:
14.5 days - Average sunshine days in August:
17.3 days - Average sunshine days in September:
18.3 days - Average sunshine days in October:
21.5 days - Average sunshine days in November:
20.9 days - Average sunshine days in December:
21.8 days
The month with the most sunshine days is December (21.8 days).
The month with the least sunshine days is July (14.5 days).
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).
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).
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).
Saint Jacob, Illinois, USA
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