Climate and monthly weather forecastJerome, IL
Climate and monthly weather forecast
Weather in January
January, like December, in Jerome, Illinois, is a wintry winter month, with an average temperature fluctuating between 21.4°F (-5.9°C) and 33.6°F (0.9°C). January is the month when Jerome sees the lowest average temperatures, with a high of 33.6°F (0.9°C) and a low of 21.4°F (-5.9°C). Weather in January »Weather in February
The last month of the winter, February, is also an icy month in Jerome, Illinois, with an average temperature fluctuating between 38.3°F (3.5°C) and 25.2°F (-3.8°C). The commencement of February records an average high-temperature of a still icy 38.3°F (3.5°C), barely varying from January's 33.6°F (0.9°C). Weather in February »Weather in March
The first month of the spring, March, is a fresh month in Jerome, Illinois, with temperature in the range of an average low of 36°F (2.2°C) and an average high of 51.4°F (10.8°C). With the arrival of March, the average high-temperature transitions from a cold 38.3°F (3.5°C) in February to a cool 51.4°F (10.8°C). Weather in March »Weather in April
April in Jerome, Illinois, is a refreshing spring month, with an average temperature ranging between max 63.3°F (17.4°C) and min 46.2°F (7.9°C). With the beginning of April, Jerome's average high-temperature sees an increase, transitioning from a cool 51.4°F (10.8°C) in March to a refreshing 63.3°F (17.4°C). Weather in April »Weather in May
The last month of the spring, May, is an agreeable month in Jerome, Illinois, with temperature in the range of an average low of 56.1°F (13.4°C) and an average high of 72.9°F (22.7°C). May's arrival signals an increase in average high-temperatures, moving from April's refreshing 63.3°F (17.4°C) to an agreeable 72.9°F (22.7°C). Weather in May »Weather in June
June, the first month of the summer in Jerome, is a moderately hot month, with an average temperature varying between 81.1°F (27.3°C) and 64.8°F (18.2°C). With the transition into June, Jerome experiences a subtle uplift in average high-temperatures, adjusting from an agreeable 72.9°F (22.7°C) in May to a moderately hot 81.1°F (27.3°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Jerome, Illinois, with an average temperature varying between 66.6°F (19.2°C) and 82.8°F (28.2°C). Jerome's warmest month, July, generally records average temperatures ranging from a high of 82.8°F (28.2°C) to a low of 66.6°F (19.2°C). The heat index in July is evaluated at a hot 91.4°F (33°C). Weather in July »Weather in August
August, the last month of the summer in Jerome, is also a moderately hot month, with temperature in the range of an average low of 64.8°F (18.2°C) and an average high of 81.9°F (27.7°C). An average high-temperature of a still moderately hot 81.9°F (27.7°C) marks August, exhibiting a close resemblance to the conditions in July. Weather in August »Weather in September
September, the first month of the autumn in Jerome, is still a warm month, with an average temperature ranging between max 77.5°F (25.3°C) and min 58.8°F (14.9°C). The introduction of September notes a subtle temperature variation to a still moderately hot 77.5°F (25.3°C) from August's 81.9°F (27.7°C). Weather in September »Weather in October
October, the same as September, is another enjoyable autumn month in Jerome, Illinois, with an average temperature varying between 64.2°F (17.9°C) and 48.2°F (9°C). The onset of October coincides with a reduction in the average high-temperature, falling from a moderately hot 77.5°F (25.3°C) in September to a comfortable 64.2°F (17.9°C). Weather in October »Weather in November
November, the last month of the autumn in Jerome, is another cool month, with temperature in the range of an average low of 36.3°F (2.4°C) and an average high of 50.2°F (10.1°C). In the transition to November, Jerome observes a drop in the average high-temperature, moving from an enjoyable 64.2°F (17.9°C) in October to a fresh 50.2°F (10.1°C). Weather in November »Weather in December
The first month of the winter, December, is still a cold month in Jerome, Illinois, with temperature in the range of an average low of 28.4°F (-2°C) and an average high of 38.8°F (3.8°C). The start of December comes with a reduction in the average high-temperature, receding from a cool 50.2°F (10.1°C) in November to a cold 38.8°F (3.8°C). Weather in December »Updated: Jun 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Jerome, the average lowest temperatures are observed in January, with a high of 33.6°F (0.9°C) and a low of 21.4°F (-5.9°C).
In Jerome, during the entire year, the rain falls for 104.2 days and collects up to 9.29" (236mm) of precipitation.
January through April, November and December are months with snowfall.
Throughout the year, in Jerome, Illinois, there are 18.6 snowfall days, and 2.68" (68mm) of snow is accumulated.
January has the least sunshine of the year, with an average of 4.2h of sunshine.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
The month with the most snowfall is February, when snow falls for 4.8 days and typically aggregates up to 0.91" (23mm) of snow.
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.
May through October are months without snowfall.
The month with the most rainfall is June, when the rain falls for 11.6 days and typically aggregates up to 1.22" (31mm) of precipitation.
With an average of 14h and 54min of daylight, June has the longest days of the year.
June has the most sunshine of the year, with an average of 10.4h of sunshine.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
In Jerome, July records the average highest temperatures, peaking at 82.8°F (28.2°C) and reaching a low of 66.6°F (19.2°C).
July is the most humid month, with an average relative humidity of 83%.
With an average relative humidity of 70%, October is the least humid month.
The month with the least rainfall is December, when the rain falls for 5.5 days and typically collects 0.43" (11mm) of precipitation.
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Jerome, IL
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (33.6°F).
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure
Jerome, IL
- Average pressure in January:
30.15"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:
29.95"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
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
Jerome, IL
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10mph - Average wind speed in April:
10.2mph - Average wind speed in May:
8.5mph - Average wind speed in June:
7.3mph
- Average wind speed in July:
6.1mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7mph - Average wind speed in October:
8.9mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity
Jerome, IL
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Jerome, IL
- Average rainfall in January:
0.63" - Average rainfall in February:
0.55" - Average rainfall in March:
0.71" - Average rainfall in April:
1.06" - Average rainfall in May:
1.06" - Average rainfall in June:
1.22"
- Average rainfall in July:
0.91" - Average rainfall in August:
0.83" - Average rainfall in September:
0.63" - Average rainfall in October:
0.79" - Average rainfall in November:
0.47" - Average rainfall in December:
0.43"
The wettest month (with the highest rainfall) is June (1.22").
The driest month (with the least rainfall) is December (0.43").
Average rainfall days
Jerome, IL
- Average rainfall days in January:
4.4 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
8.9 days - Average rainfall days in April:
11.3 days - Average rainfall days in May:
12.5 days - Average rainfall days in June:
11.6 days
- Average rainfall days in July:
10.8 days - Average rainfall days in August:
10.5 days - Average rainfall days in September:
9.1 days - Average rainfall days in October:
7.7 days - Average rainfall days in November:
6.6 days - Average rainfall days in December:
5.5 days
The month with the highest number of rainy days is May (12.5 days).
The month with the least rainy days is January (4.4 days).
Average snowfall
Jerome, IL
The month with the highest snowfall is February (0.91").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Jerome, IL
- Average snowfall days in January:
5.7 days - Average snowfall days in February:
4.8 days - Average snowfall days in March:
2.3 days - Average snowfall days in April:
0.3 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:
1.5 days - Average snowfall days in December:
3.9 days
The month with the highest number of snowfall days is January (5.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Jerome, IL
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
14h and 54min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
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).
- Average sunshine in January:
4h and 12min - Average sunshine in February:
4h and 30min - Average sunshine in March:
6h and 36min - Average sunshine in April:
8h and 18min - Average sunshine in May:
9h and 18min - Average sunshine in June:
10h and 24min
- Average sunshine in July:
10h and 12min - Average sunshine in August:
9h and 54min - Average sunshine in September:
9h and 18min - Average sunshine in October:
6h and 6min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 48min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days
Jerome, IL
- Average sunshine days in January:
22.2 days - Average sunshine days in February:
18.7 days - Average sunshine days in March:
18.6 days - Average sunshine days in April:
16.2 days - Average sunshine days in May:
14.8 days - Average sunshine days in June:
14 days
- Average sunshine days in July:
16 days - Average sunshine days in August:
16.2 days - Average sunshine days in September:
18.5 days - Average sunshine days in October:
21.8 days - Average sunshine days in November:
21.8 days - Average sunshine days in December:
22.6 days
The month with the most sunshine days is December (22.6 days).
The month with the least sunshine days is June (14 days).
Average UV index
Jerome, 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
Jerome, IL
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility
Jerome, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
