Expand
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 Walnut, Illinois, is another subzero cold winter month, with an average temperature fluctuating between 27.5°F (-2.5°C) and 15.6°F (-9.1°C). Walnut experiences its lowest temperatures in January, with an average peak of 27.5°F (-2.5°C) and a low of 15.6°F (-9.1°C). Weather in January »
Weather in February
The last month of the winter, February, is a cold month in Walnut, Illinois, with an average temperature fluctuating between 32°F (0°C) and 19.2°F (-7.1°C). The commencement of February records an average high-temperature of a cold 32°F (0°C), barely varying from January's 27.5°F (-2.5°C). Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Walnut, Illinois, with an average temperature fluctuating between 31.6°F (-0.2°C) and 46°F (7.8°C). An escalation in the average high-temperature is seen with the onset of March, moving from a wintry 32°F (0°C) in February to a frosty 46°F (7.8°C). Weather in March »
Weather in April
April is a mild spring month in Walnut, Illinois, with an average temperature varying between 58.1°F (14.5°C) and 41.9°F (5.5°C). The shift from March to April is marked by an increase in the average high-temperature, moving from a frosty 46°F (7.8°C) to a refreshing 58.1°F (14.5°C). Weather in April »
Weather in May
May, the last month of the spring in Walnut, is a pleasant month, with an average temperature fluctuating between 53.1°F (11.7°C) and 70°F (21.1°C). Walnut experiences a temperature shift with the start of May, with average high-temperatures moving from a mild 58.1°F (14.5°C) in April to a pleasant 70°F (21.1°C). Weather in May »
Weather in June
June, the first month of the summer in Walnut, is a warm month, with an average temperature varying between 78.4°F (25.8°C) and 61.3°F (16.3°C). A gentle upsurge in temperatures occurs as May gives way to June, with average highs shifting from an agreeable 70°F (21.1°C) to a moderately hot 78.4°F (25.8°C). Weather in June »
Weather in July
July, like June, in Walnut, Illinois, is another warm summer month, with an average temperature ranging between max 80.2°F (26.8°C) and min 64.2°F (17.9°C). Walnut witnesses the warmest weather in July, with temperatures averaging a high of 80.2°F (26.8°C) and a low of 64.2°F (17.9°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Walnut, Illinois, with an average temperature varying between 79.5°F (26.4°C) and 62.1°F (16.7°C). August's onset records a minor alteration in the average high-temperature to a still moderately hot 79.5°F (26.4°C) from July's 80.2°F (26.8°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Walnut, Illinois, with temperature in the range of an average high of 74.3°F (23.5°C) and an average low of 55.8°F (13.2°C). The transition from August to September sees average high-temperatures adjusting to a still warm 74.3°F (23.5°C), from a not significantly different 79.5°F (26.4°C). Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Walnut, Illinois, with an average temperature varying between 61°F (16.1°C) and 45°F (7.2°C). October comes with a drop in the average high-temperature, falling from September's moderately hot 74.3°F (23.5°C) to an enjoyable 61°F (16.1°C). Weather in October »
Weather in November
November, the last month of the autumn in Walnut, is also a frosty month, with an average temperature fluctuating between 32.9°F (0.5°C) and 46.2°F (7.9°C). November's arrival signals a significant decrease in average high-temperatures, falling from October's enjoyable 61°F (16.1°C) to a frosty 46.2°F (7.9°C). Weather in November »
Weather in December
December, the first month of the winter in Walnut, is also a wintry month, with an average temperature ranging between min 23.9°F (-4.5°C) and max 34°F (1.1°C). Transition into December marks a drop in the average high-temperature, moving from a frosty 46.2°F (7.9°C) in November to an icy 34°F (1.1°C). Weather in December »
Updated: Jul 24, 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 are the coldest months?
January, with average temperatures reaching a high of 27.5°F (-2.5°C) and a low of 15.6°F (-9.1°C), is the coldest month.
What is the driest month?
January is the month with the least rainfall. Rain falls for 3.8 days and accumulates 0.55" (14mm) of precipitation.
How much does it rain?
In Walnut, during the entire year, the rain falls for 114.5 days and collects up to 12.72" (323mm) of precipitation.
When does it snow?
January through April, October through December are months with snowfall.
What is the snowiest month?
The month with the most snowfall is January, when snow falls for 10.1 days and typically aggregates up to 1.57" (40mm) of snow.
How many days does it snow?
In Walnut, during the entire year, snow falls for 31.5 days and aggregates up to 5.2" (132mm) of snow.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 3.7h of sunshine.
When is the lowest UV index?
January and December, with an average maximum UV index of 1, are months with the lowest UV index.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Walnut, 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.
What is the wettest month?
The month with the most rainfall in Walnut is May, when the rain falls for 15.3 days and typically aggregates up to 2.01" (51mm) of precipitation.
When it does not snow?
In Walnut, snow does not fall in May through September.
When are the longest days?
With an average of 15h and 6min of daylight, June has the longest days of the year.
What are the months with the most sunshine?
The months with the most sunshine are June through August, with an average of 9.6h of sunshine.
What is the hottest time of year?
With an average high-temperature of 80.2°F (26.8°C) and an average low-temperature of 64.2°F (17.9°C), July is the warmest month.
What is the most humid month?
With an average relative humidity of 85%, July is the most humid month.
What is the month with the highest UV index?
With an average maximum UV index of 6, July is the month with the highest UV index.
What is the least humid month in Walnut?
October is the least humid month, with an average relative humidity of 73%.
What is the month with the shortest days?
The month with the shortest days in Walnut is December, with an average of 9h and 12min of daylight.
Average temperature
Walnut, IL
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (27.5°F).
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).
Average pressure
Walnut, IL
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.11"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:
29.97"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Walnut, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10.1mph - Average wind speed in April:
10.5mph - Average wind speed in May:
8.9mph - Average wind speed in June:
7.7mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.5mph - Average wind speed in September:
7.6mph - Average wind speed in October:
9.3mph - Average wind speed in November:
9.9mph - Average wind speed in December:
9.6mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity
Walnut, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Walnut, IL
- Average rainfall in January:
0.55" - Average rainfall in February:
0.63" - Average rainfall in March:
0.87" - Average rainfall in April:
1.46" - Average rainfall in May:
2.01" - Average rainfall in June:
1.42"
- Average rainfall in July:
1.34" - Average rainfall in August:
1.02" - Average rainfall in September:
0.94" - Average rainfall in October:
1.14" - Average rainfall in November:
0.71" - Average rainfall in December:
0.63"
The wettest month (with the highest rainfall) is May (2.01").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days
Walnut, IL
- Average rainfall days in January:
3.8 days - Average rainfall days in February:
4 days - Average rainfall days in March:
9.6 days - Average rainfall days in April:
12.8 days - Average rainfall days in May:
15.3 days - Average rainfall days in June:
13.8 days
- Average rainfall days in July:
13.2 days - Average rainfall days in August:
11.5 days - Average rainfall days in September:
9.1 days - Average rainfall days in October:
9.5 days - Average rainfall days in November:
7.1 days - Average rainfall days in December:
4.8 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (3.8 days).
Average snowfall
Walnut, IL
The month with the highest snowfall is January (1.57").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Walnut, IL
- Average snowfall days in January:
10.1 days - Average snowfall days in February:
8.1 days - Average snowfall days in March:
3.6 days - Average snowfall days in April:
0.9 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:
0.5 days - Average snowfall days in November:
1.8 days - Average snowfall days in December:
6.5 days
The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Walnut, IL
- Average daylight in January:
9h and 4min - 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 3min - 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 6min).
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 2min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
9h and 4min - Average sunshine in August:
9h and 4min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 0min
The months with the most sunshine are June, July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Walnut, IL
- Average sunshine days in January:
19.2 days - Average sunshine days in February:
17.3 days - Average sunshine days in March:
18.4 days - Average sunshine days in April:
15.1 days - Average sunshine days in May:
13.6 days - Average sunshine days in June:
13.5 days
- Average sunshine days in July:
14.3 days - Average sunshine days in August:
16.1 days - Average sunshine days in September:
19.4 days - Average sunshine days in October:
19.7 days - Average sunshine days in November:
20.7 days - Average sunshine days in December:
20.8 days
The month with the most sunshine days is December (20.8 days).
The month with the least sunshine days is June (13.5 days).
Average UV index
Walnut, 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
Walnut, IL
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility
Walnut, 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).
Walnut, Illinois, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location