Climate and monthly weather forecastCastle Junction, IL
Climate and monthly weather forecast
Weather in January
January, like December, is another subzero cold winter month in Castle Junction, Illinois, with an average temperature ranging between max 28.2°F (-2.1°C) and min 16.2°F (-8.8°C). January stands out as Castle Junction's coldest month, with an average high-temperature of 28.2°F (-2.1°C) and a low-temperature of 16.2°F (-8.8°C). Weather in January »Weather in February
February, the last month of the winter in Castle Junction, is a cold month, with an average temperature ranging between min 20.1°F (-6.6°C) and max 33.1°F (0.6°C). In Castle Junction, February's average high-temperature stands at a wintry 33.1°F (0.6°C), closely related to the preceding month. Weather in February »Weather in March
The first month of the spring, March, is a frosty month in Castle Junction, Illinois, with temperature in the range of an average low of 32.2°F (0.1°C) and an average high of 46.9°F (8.3°C). The shift into March is accompanied by a temperature increase, with the average high-temperature rising from a wintry 33.1°F (0.6°C) in February to a chilly 46.9°F (8.3°C). Weather in March »Weather in April
April is a moderate spring month in Castle Junction, Illinois, with an average temperature varying between 59.2°F (15.1°C) and 42.4°F (5.8°C). The shift into April is characterized by a rise in the average high-temperature, transitioning from March's chilly 46.9°F (8.3°C) to a mild 59.2°F (15.1°C). Weather in April »Weather in May
May, the last month of the spring in Castle Junction, is a pleasant month, with an average temperature fluctuating between 53.6°F (12°C) and 70.3°F (21.3°C). May's onset brings a temperature rise, moving from a mild 59.2°F (15.1°C) in April to a pleasant 70.3°F (21.3°C). Weather in May »Weather in June
June, the first month of the summer in Castle Junction, is a warm month, with an average temperature ranging between min 62.4°F (16.9°C) and max 79°F (26.1°C). Castle Junction's transition into June sees a mild rise in the average high-temperature, edging from a pleasant 70.3°F (21.3°C) in May to a warm 79°F (26.1°C). Weather in June »Weather in July
July, like June, in Castle Junction, Illinois, is a moderately hot summer month, with an average temperature fluctuating between 81.7°F (27.6°C) and 65.1°F (18.4°C). In Castle Junction, Illinois, the month of July is known for its highest average temperatures, reaching a high of 81.7°F (27.6°C) and a low of 65.1°F (18.4°C). July's average heat index is computed to be a tropical 89.6°F (32°C). Weather in July »Weather in August
August, the last month of the summer in Castle Junction, is another warm month, with an average temperature fluctuating between 63.1°F (17.3°C) and 80.8°F (27.1°C). Castle Junction experiences a subtle adjustment in high-temperatures to a still moderately hot 80.8°F (27.1°C) with the onset of August, maintaining near parity with July's 81.7°F (27.6°C). Weather in August »Weather in September
September, the first month of the autumn in Castle Junction, is still a warm month, with an average temperature ranging between max 75.4°F (24.1°C) and min 56.3°F (13.5°C). During the shift to September, a minor reduction in average high-temperature is observed, shifting from 80.8°F (27.1°C) in August to a still moderately hot 75.4°F (24.1°C). Weather in September »Weather in October
October, like September, in Castle Junction, Illinois, is another enjoyable autumn month, with an average temperature fluctuating between 61.5°F (16.4°C) and 45.1°F (7.3°C). The onset of October comes with a shift in the average high-temperature, falling from a warm 75.4°F (24.1°C) in September to a comfortable 61.5°F (16.4°C). Weather in October »Weather in November
November, the last month of the autumn in Castle Junction, is another chilly month, with an average temperature varying between 47.1°F (8.4°C) and 33.3°F (0.7°C). In November, the average high-temperature goes from a comfortable 61.5°F (16.4°C) in October to a frosty 47.1°F (8.4°C). Weather in November »Weather in December
The first month of the winter, December, is still a cold month in Castle Junction, Illinois, with an average temperature ranging between min 24.1°F (-4.4°C) and max 34.5°F (1.4°C). Castle Junction's December weather features a mild decline in high-temperatures, reducing from a chilly 47.1°F (8.4°C) in November to a cold 34.5°F (1.4°C). Weather in December »Updated: Jul 11, 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
With average high and low temperatures of 28.2°F (-2.1°C) and 16.2°F (-8.8°C) respectively, January is Castle Junction's coldest month.
The months with the highest humidity are January and July, with an average relative humidity of 83%.
Throughout the year, in Castle Junction, there are 128 rainfall days, and 19.29" (490mm) of precipitation is accumulated.
Months with snowfall are January through April, October through December.
In Castle Junction, during the entire year, snow falls for 35.4 days and aggregates up to 8.35" (212mm) of snow.
The month with the least sunshine is January, with an average of 4h of sunshine.
January is the month with the lowest UV index, with an average maximum UV index of 1.
February is the month with the most snowfall. Snow falls for 8.8 days and accumulates 2.52" (64mm) 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 is the month with the most rainfall. Rain falls for 16.5 days and accumulates 3.31" (84mm) of precipitation.
In Castle Junction, snow does not fall in May through September.
June has the longest days of the year, with an average of 15h and 6min of daylight.
The months with the highest UV index are June and July, with an average maximum UV index of 6.
July is the month when Castle Junction sees the average highest temperatures, with a high of 81.7°F (27.6°C) and a low of 65.1°F (18.4°C).
The month with the most sunshine is July, with an average of 10.3h of sunshine.
The least humid month is October, with an average relative humidity of 71%.
December is the month with the least rainfall. Rain falls for 6.6 days and accumulates 0.75" (19mm) of precipitation.
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
Castle Junction, IL
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.2°F).
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure
Castle Junction, IL
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.9"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Castle Junction, IL
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.6mph - Average wind speed in May:
9mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.7mph - Average wind speed in September:
7.8mph - Average wind speed in October:
9.6mph - Average wind speed in November:
10.3mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity
Castle Junction, IL
The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Castle Junction, IL
- Average rainfall in January:
0.79" - Average rainfall in February:
0.79" - Average rainfall in March:
1.1" - Average rainfall in April:
2.01" - Average rainfall in May:
3.31" - Average rainfall in June:
2.8"
The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is December (0.75").
Average rainfall days
Castle Junction, IL
- Average rainfall days in January:
4.2 days - Average rainfall days in February:
4.3 days - Average rainfall days in March:
9.8 days - Average rainfall days in April:
14.3 days - Average rainfall days in May:
16.5 days - Average rainfall days in June:
17 days
- Average rainfall days in July:
15 days - Average rainfall days in August:
12.3 days - Average rainfall days in September:
9.5 days - Average rainfall days in October:
11.1 days - Average rainfall days in November:
7.4 days - Average rainfall days in December:
6.6 days
The month with the highest number of rainy days is June (17 days).
The month with the least rainy days is January (4.2 days).
Average snowfall
Castle Junction, IL
The month with the highest snowfall is February (2.52").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Castle Junction, IL
- Average snowfall days in January:
10.3 days - Average snowfall days in February:
8.8 days - Average snowfall days in March:
4.2 days - Average snowfall days in April:
1.4 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:
0.7 days - Average snowfall days in November:
2.2 days - Average snowfall days in December:
7.8 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Castle Junction, IL
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
4h and 0min - Average sunshine in February:
4h and 12min - Average sunshine in March:
6h and 30min - Average sunshine in April:
7h and 54min - Average sunshine in May:
8h and 48min - Average sunshine in June:
9h and 54min
- Average sunshine in July:
10h and 18min - Average sunshine in August:
9h and 54min - Average sunshine in September:
9h and 24min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
Castle Junction, IL
- Average sunshine days in January:
17.8 days - Average sunshine days in February:
15.5 days - Average sunshine days in March:
17.2 days - Average sunshine days in April:
13.4 days - Average sunshine days in May:
10.9 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
11.9 days - Average sunshine days in August:
15.5 days - Average sunshine days in September:
18.5 days - Average sunshine days in October:
17.5 days - Average sunshine days in November:
19.6 days - Average sunshine days in December:
18.6 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is June (10.8 days).
Average UV index
Castle Junction, IL
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Castle Junction, IL
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility
Castle Junction, 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).
