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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, the same as December, in Stillman Valley, Illinois, is a freezing cold winter month, with an average temperature varying between 26.2°F (-3.2°C) and 14°F (-10°C). The coldest time of the year is January, with temperatures averaging a high of 26.2°F (-3.2°C) and a low of 14°F (-10°C). Weather in January »
Weather in February
February, the last month of the winter in Stillman Valley, is another freezing cold month, with temperature in the range of an average low of 17.4°F (-8.1°C) and an average high of 30.4°F (-0.9°C). Stillman Valley's entry into February measures an average high-temperature of a still subzero cold 30.4°F (-0.9°C), closely parallel to the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Stillman Valley, is a chilly month, with an average temperature ranging between min 29.8°F (-1.2°C) and max 44.2°F (6.8°C). A rise in the average high-temperature is observed during March, moving from a freezing cold 30.4°F (-0.9°C) in February to a frosty 44.2°F (6.8°C). Weather in March »
Weather in April
April is a refreshing spring month in Stillman Valley, Illinois, with temperature in the range of an average high of 56.3°F (13.5°C) and an average low of 39.7°F (4.3°C). April sees a rise in the average high-temperature, climbing from a chilly 44.2°F (6.8°C) in March to a mild 56.3°F (13.5°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Stillman Valley, Illinois, with an average temperature varying between 51.3°F (10.7°C) and 68.5°F (20.3°C). May's onset is marked by a temperature increase, moving from a refreshing 56.3°F (13.5°C) in April to a pleasant 68.5°F (20.3°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Stillman Valley, Illinois, with an average temperature fluctuating between 77.2°F (25.1°C) and 60.1°F (15.6°C). With the onset of June, Stillman Valley's average high-temperature sees a modest rise, moving from May's pleasant 68.5°F (20.3°C) to a moderately hot 77.2°F (25.1°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Stillman Valley, Illinois, with temperature in the range of an average low of 63.1°F (17.3°C) and an average high of 79.9°F (26.6°C). Stillman Valley's warmest month, July, generally records average temperatures ranging from a high of 79.9°F (26.6°C) to a low of 63.1°F (17.3°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Stillman Valley, Illinois, with temperature in the range of an average high of 78.1°F (25.6°C) and an average low of 60.6°F (15.9°C). Stillman Valley registers an average high-temperature of a still moderately hot 78.1°F (25.6°C) with the arrival of August, showing minor deviation from the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Stillman Valley, Illinois, with an average temperature fluctuating between 54.3°F (12.4°C) and 72.7°F (22.6°C). A subtle shift in Stillman Valley's weather is observed as August turns into September, with the average high temperature reducing from a moderately hot 78.1°F (25.6°C) to an agreeable 72.7°F (22.6°C). Weather in September »
Weather in October
October, the same as September, in Stillman Valley, Illinois, is a moderate autumn month, with an average temperature varying between 59.5°F (15.3°C) and 43.7°F (6.5°C). Onset of October comes with a temperature decline, the average high falling from an agreeable 72.7°F (22.6°C) in September to a refreshing 59.5°F (15.3°C). Weather in October »
Weather in November
November, the last month of the autumn in Stillman Valley, is also a frosty month, with an average temperature varying between 31.8°F (-0.1°C) and 44.8°F (7.1°C). With the transition into November, Stillman Valley experiences a significant decrease in average high-temperatures, moving down from a mild 59.5°F (15.3°C) in October to a chilly 44.8°F (7.1°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Stillman Valley, Illinois, with an average temperature varying between 32.5°F (0.3°C) and 22.5°F (-5.3°C). December brings a drop in Stillman Valley's average high-temperature, falling from a chilly 44.8°F (7.1°C) in November to a cold 32.5°F (0.3°C). Weather in December »
Updated: Feb 12, 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
What time of the year is the coldest in Stillman Valley?
With an average high-temperature of 26.2°F (-3.2°C) and an average low-temperature of 14°F (-10°C), January is the coldest month.
What is the most humid month in Stillman Valley?
The most humid month in Stillman Valley, Illinois, is January, with an average relative humidity of 86%.
What is the driest month in Stillman Valley?
January and February are months with the least rain in Stillman Valley when the rain falls for 3.2 days and typically aggregates up to 0.35" (9mm) of rain.
How much does it rain in Stillman Valley?
Throughout the year, in Stillman Valley, Illinois, there are 100.6 rainfall days, and 7.99" (203mm) of precipitation is accumulated.
When does it snow in Stillman Valley?
January through April, October through December are months with snowfall in Stillman Valley, Illinois.
When does it snow the most in Stillman Valley?
January is the month with the most snowfall. Snow falls for 8.1 days and accumulates 1.42" (36mm) of snow.
How much does it snow in Stillman Valley?
Throughout the year, there are 29.5 snowfall days, and 3.66" (93mm) of snow is accumulated.
What is the month with the least sunshine in Stillman Valley?
With an average of 3.7h of sunshine, January has the least sunshine of the year in Stillman Valley.
What are the months with the lowest UV index in Stillman Valley?
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Stillman Valley.
When is Daylight Saving Time (DST) in Stillman Valley?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Stillman Valley, 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.
What are the least humid months in Stillman Valley?
April and October, with an average relative humidity of 75%, are the least humid months in Stillman Valley.
What is the rainiest month in Stillman Valley?
May is the month with the most rainfall. Rain falls for 13.8 days and accumulates 1.18" (30mm) of precipitation.
When it does not snow in Stillman Valley?
May through September are months without snowfall.
When are the longest days in Stillman Valley?
With an average of 15h and 12min of daylight, June has the longest days of the year.
What time of the year is the hottest in Stillman Valley?
The warmest time of the year in Stillman Valley is July, with temperatures averaging a high of 79.9°F (26.6°C) and a low of 63.1°F (17.3°C).
What month has the most sunshine in Stillman Valley?
The month with the most sunshine in Stillman Valley, Illinois, is July, with an average of 9.8h of sunshine.
When is the highest UV index in Stillman Valley?
With an average maximum UV index of 6, July is the month with the highest UV index.
What is the month with the shortest days in Stillman Valley?
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
Stillman Valley, IL
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (26.2°F).
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14°F).
Average pressure
Stillman Valley, IL
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Stillman Valley, IL
- Average wind speed in January:
9.8mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.7mph - Average wind speed in April:
10.2mph - Average wind speed in May:
8.6mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.3mph - Average wind speed in September:
7.4mph - Average wind speed in October:
8.9mph - Average wind speed in November:
9.7mph - Average wind speed in December:
9.4mph
The windiest month (with the highest average wind speed) is April (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity
Stillman Valley, IL
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall
Stillman Valley, IL
- Average rainfall in January:
0.35" - Average rainfall in February:
0.35" - Average rainfall in March:
0.47" - Average rainfall in April:
0.91" - Average rainfall in May:
1.18" - Average rainfall in June:
1.02"
- Average rainfall in July:
1.02" - Average rainfall in August:
0.59" - Average rainfall in September:
0.63" - Average rainfall in October:
0.67" - Average rainfall in November:
0.39" - Average rainfall in December:
0.39"
The wettest month (with the highest rainfall) is May (1.18").
The driest months (with the least rainfall) are January and February (0.35").
Average rainfall days
Stillman Valley, IL
- Average rainfall days in January:
3.2 days - Average rainfall days in February:
3.5 days - Average rainfall days in March:
8.9 days - Average rainfall days in April:
11.1 days - Average rainfall days in May:
13.8 days - Average rainfall days in June:
13.5 days
- Average rainfall days in July:
10.8 days - Average rainfall days in August:
10.3 days - Average rainfall days in September:
7.7 days - Average rainfall days in October:
7.7 days - Average rainfall days in November:
5.5 days - Average rainfall days in December:
4.6 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is January (3.2 days).
Average snowfall
Stillman Valley, IL
The month with the highest snowfall is January (1.42").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Stillman Valley, IL
- Average snowfall days in January:
8.1 days - Average snowfall days in February:
7.2 days - Average snowfall days in March:
4 days - Average snowfall days in April:
1.1 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:
0.4 days - Average snowfall days in November:
2.1 days - Average snowfall days in December:
6.6 days
The month with the highest number of snowfall days is January (8.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Stillman Valley, IL
- Average daylight in January:
9h and 3min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
3h and 5min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 3min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 4min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 2min - Average sunshine in November:
5h and 1min - Average sunshine in December:
3h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Stillman Valley, IL
- Average sunshine days in January:
21.9 days - Average sunshine days in February:
19.2 days - Average sunshine days in March:
20.3 days - Average sunshine days in April:
16.8 days - Average sunshine days in May:
15.4 days - Average sunshine days in June:
12.8 days
- Average sunshine days in July:
16.3 days - Average sunshine days in August:
18 days - Average sunshine days in September:
20 days - Average sunshine days in October:
21.7 days - Average sunshine days in November:
22.3 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 (12.8 days).
Average UV index
Stillman Valley, IL
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Stillman Valley, IL
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility
Stillman Valley, IL
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Stillman Valley, Illinois, USA
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