Climate and monthly weather forecastJacob, IL
Climate and monthly weather forecast
Weather in January
January, like December, in Jacob, Illinois, is another cold winter month, with an average temperature varying between 26.2°F (-3.2°C) and 39.6°F (4.2°C). January stands out as Jacob's coldest month, with temperatures ranging between an average high of 39.6°F (4.2°C) and a low of 26.2°F (-3.2°C). Weather in January »Weather in February
The last month of the winter, February, is a chilly month in Jacob, Illinois, with temperature in the range of an average low of 30°F (-1.1°C) and an average high of 43.7°F (6.5°C). A minimal variation is noted in Jacob's average high-temperature at the onset of February, reaching a frosty 43.7°F (6.5°C) from January's 39.6°F (4.2°C). Weather in February »Weather in March
March, the first month of the spring in Jacob, is a fresh month, with an average temperature ranging between min 38.8°F (3.8°C) and max 55.2°F (12.9°C). In March, the meteorological conditions change with the average high-temperature moving from a chilly 43.7°F (6.5°C) in February to a cool 55.2°F (12.9°C). Weather in March »Weather in April
April is an enjoyable spring month in Jacob, Illinois, with temperature in the range of an average low of 48.6°F (9.2°C) and an average high of 66.2°F (19°C). As Jacob transitions into April, the average high-temperature is observed to rise from a fresh 55.2°F (12.9°C) in March to an enjoyable 66.2°F (19°C). Weather in April »Weather in May
May, the last month of the spring in Jacob, is a moderately hot month, with an average temperature varying between 58.3°F (14.6°C) and 75.7°F (24.3°C). May marks a rise in the average high-temperature, moving from April's enjoyable 66.2°F (19°C) to a warm 75.7°F (24.3°C). Weather in May »Weather in June
June, the first month of the summer in Jacob, is still a warm month, with an average temperature fluctuating between 84.7°F (29.3°C) and 66.4°F (19.1°C). The average high-temperature increases in June, moving from 75.7°F (24.3°C) in May to a still warm 84.7°F (29.3°C). Weather in June »Weather in July
July in Jacob, Illinois, is a hot summer month, with an average temperature ranging between min 68.7°F (20.4°C) and max 87.4°F (30.8°C). July, with an average high of 87.4°F (30.8°C) and a low of 68.7°F (20.4°C), signifies the warmest month of the year. The heat index in July is evaluated at a torrid 102.2°F (39°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Jacob, Illinois, with an average temperature ranging between max 85.8°F (29.9°C) and min 66.4°F (19.1°C). August's weather records an average high-temperature of a moderately hot 85.8°F (29.9°C), showing little deviation from July. Weather in August »Weather in September
September, the first month of the autumn in Jacob, is still a warm month, with an average temperature varying between 60.3°F (15.7°C) and 80.4°F (26.9°C). September's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from August's moderately hot 85.8°F (29.9°C) to a still warm 80.4°F (26.9°C). Weather in September »Weather in October
October, the same as September, is another refreshing autumn month in Jacob, Illinois, with temperature in the range of an average low of 49.3°F (9.6°C) and an average high of 67.5°F (19.7°C). Jacob in October experiences a subtle temperature decline, with average high-temperatures reducing from a warm 80.4°F (26.9°C) in September to a comfortable 67.5°F (19.7°C). Weather in October »Weather in November
November, the last month of the autumn in Jacob, is another cool month, with an average temperature fluctuating between 38.7°F (3.7°C) and 54°F (12.2°C). November's arrival coincides with a drop in the average high-temperature, decreasing from October's enjoyable 67.5°F (19.7°C) to a cool 54°F (12.2°C). Weather in November »Weather in December
December, the first month of the winter in Jacob, is still a chilly month, with an average temperature varying between 43.7°F (6.5°C) and 31.8°F (-0.1°C). December indicates a shift in the average high-temperature, from November's cool 54°F (12.2°C) to a chilly 43.7°F (6.5°C). Weather in December »Updated: Feb 12, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
With average temperatures fluctuating between a high of 39.6°F (4.2°C) and a low of 26.2°F (-3.2°C), January stands out as the coldest month in Jacob.
Throughout the year, in Jacob, there are 158.6 rainfall days, and 34.69" (881mm) of precipitation is accumulated.
January through April, October through December are months with snowfall in Jacob.
In Jacob, Illinois, during the entire year, snow falls for 15.9 days and aggregates up to 5.71" (145mm) of snow.
The month with the least sunshine in Jacob is January, with an average of 4.7h of sunshine.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Jacob.
The month with the most snowfall in Jacob, Illinois, is February, when snow falls for 4.8 days and typically aggregates up to 1.73" (44mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Jacob, 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.
The month with the most rainfall in Jacob is April, when the rain falls for 15.5 days and typically aggregates up to 4.49" (114mm) of precipitation.
With an average relative humidity of 79%, May is the most humid month in Jacob.
May through September are months without snowfall in Jacob.
The months with the highest UV index in Jacob, Illinois, are May through August, with an average maximum UV index of 6.
With an average of 14h and 42min of daylight, June has the longest days of the year in Jacob.
The month with the most sunshine is June, with an average of 10.6h of sunshine.
With average high and low temperatures of 87.4°F (30.8°C) and 68.7°F (20.4°C) respectively, July is Jacob's warmest month.
September is the month with the least rainfall. Rain falls for 12.7 days and accumulates 1.85" (47mm) of precipitation.
October is the least humid month in Jacob, with an average relative humidity of 71%.
With an average of 9h and 36min of daylight, December has the shortest days of the year.
Average temperature
Jacob, IL
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.6°F).
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure
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:
29.95"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Jacob, IL
- Average wind speed in January:
9.4mph - Average wind speed in February:
9.3mph - Average wind speed in March:
9.1mph - Average wind speed in April:
8.9mph - Average wind speed in May:
7.5mph - Average wind speed in June:
6.5mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.6mph - Average wind speed in September:
6.2mph - Average wind speed in October:
7.8mph - Average wind speed in November:
8.5mph - Average wind speed in December:
8.6mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity
Jacob, IL
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Jacob, IL
- Average rainfall in January:
2.17" - Average rainfall in February:
2.36" - Average rainfall in March:
3.11" - Average rainfall in April:
4.49" - Average rainfall in May:
3.82" - Average rainfall in June:
3.43"
The wettest month (with the highest rainfall) is April (4.49").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days
Jacob, IL
- Average rainfall days in January:
9.4 days - Average rainfall days in February:
10.3 days - Average rainfall days in March:
15.2 days - Average rainfall days in April:
15.5 days - Average rainfall days in May:
17.1 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
16.8 days - Average rainfall days in August:
13.9 days - Average rainfall days in September:
12.7 days - Average rainfall days in October:
10.8 days - Average rainfall days in November:
10.6 days - Average rainfall days in December:
10.3 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (9.4 days).
Average snowfall
Jacob, IL
The month with the highest snowfall is February (1.73").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Jacob, IL
- Average snowfall days in January:
4.8 days - Average snowfall days in February:
4.8 days - Average snowfall days in March:
1.8 days - Average snowfall days in April:
0.4 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 days - Average snowfall days in December:
3 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
Jacob, IL
- Average daylight in January:
9h and 54min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 12min - Average daylight in June:
14h and 42min
- Average daylight in July:
14h and 30min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 6min - Average daylight in December:
9h and 36min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
4h and 42min - Average sunshine in February:
4h and 48min - Average sunshine in March:
6h and 30min - Average sunshine in April:
8h and 42min - Average sunshine in May:
9h and 18min - Average sunshine in June:
10h and 36min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
10h and 18min - Average sunshine in September:
9h and 30min - Average sunshine in October:
6h and 30min - Average sunshine in November:
5h and 36min - Average sunshine in December:
4h and 48min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days
Jacob, IL
- Average sunshine days in January:
17.7 days - Average sunshine days in February:
13.6 days - Average sunshine days in March:
13.4 days - Average sunshine days in April:
12.3 days - Average sunshine days in May:
11.3 days - Average sunshine days in June:
12.2 days
- Average sunshine days in July:
11.7 days - Average sunshine days in August:
14.2 days - Average sunshine days in September:
16 days - Average sunshine days in October:
18.5 days - Average sunshine days in November:
17.9 days - Average sunshine days in December:
18.4 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (11.3 days).
Average UV index
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
Jacob, IL
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June and August (Cloud cover 27).
Average visibility
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).
