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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, like December, in Herald, Illinois, is another cold winter month, with an average temperature varying between 26.1°F (-3.3°C) and 38.3°F (3.5°C). January, marked by an average high-temperature of 38.3°F (3.5°C) and a low-temperature of 26.1°F (-3.3°C), is the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Herald, is a chilly month, with an average temperature ranging between min 30°F (-1.1°C) and max 43.7°F (6.5°C). With the beginning of February, Herald's average high-temperature sees a minor increase, transitioning from a cold 38.3°F (3.5°C) in January to a chilly 43.7°F (6.5°C). Weather in February »
Weather in March
March, the first month of the spring in Herald, is a fresh month, with an average temperature ranging between max 54.5°F (12.5°C) and min 39°F (3.9°C). March's arrival brings a temperature shift, moving from a chilly 43.7°F (6.5°C) in February to a cool 54.5°F (12.5°C). Weather in March »
Weather in April
April in Herald, Illinois, is a refreshing spring month, with an average temperature ranging between min 48.7°F (9.3°C) and max 66°F (18.9°C). April's arrival signals an increase in average high-temperatures, moving from March's fresh 54.5°F (12.5°C) to a comfortable 66°F (18.9°C). Weather in April »
Weather in May
The last month of the spring, May, is a moderately hot month in Herald, Illinois, with an average temperature fluctuating between 58.3°F (14.6°C) and 75.2°F (24°C). The commencement of May sees a shift in the average high-temperature, moving from an enjoyable 66°F (18.9°C) in April to a warm 75.2°F (24°C). Weather in May »
Weather in June
June, the first month of the summer in Herald, is still a warm month, with an average temperature varying between 83.8°F (28.8°C) and 66.6°F (19.2°C). June signals a minor shift in the average high-temperature, moving from May's 75.2°F (24°C) to a still moderately hot 83.8°F (28.8°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Herald, Illinois, with an average temperature ranging between min 68.2°F (20.1°C) and max 85.6°F (29.8°C). Herald's July weather, marked by an average high temperature of 85.6°F (29.8°C) and an average low temperature of 68.2°F (20.1°C), is the warmest in the year. July's average heat index is estimated at a torrid 98.6°F (37°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Herald, Illinois, with temperature in the range of an average low of 65.8°F (18.8°C) and an average high of 84.4°F (29.1°C). August's arrival brings an average high-temperature of a still moderately hot 84.4°F (29.1°C), demonstrating subtle variation from the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Herald, Illinois, with an average temperature fluctuating between 60.8°F (16°C) and 79.5°F (26.4°C). The shift into September uncovers an average high-temperature of a still warm 79.5°F (26.4°C), subtly different from the previous month. Weather in September »
Weather in October
October, like September, in Herald, Illinois, is another comfortable autumn month, with an average temperature varying between 49.6°F (9.8°C) and 67.1°F (19.5°C). During Herald's transition into October, the average high-temperature lessens, moving from a moderately hot 79.5°F (26.4°C) in September to a refreshing 67.1°F (19.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Herald, Illinois, with an average temperature ranging between min 38.5°F (3.6°C) and max 53.6°F (12°C). The onset of November introduces a moderate change in Herald's weather, with average high-temperatures falling from October's comfortable 67.1°F (19.5°C) to a fresh 53.6°F (12°C). Weather in November »
Weather in December
December, the first month of the winter in Herald, is still a chilly month, with an average temperature varying between 43.5°F (6.4°C) and 32.2°F (0.1°C). The average high-temperature decreases in December, shifting from a fresh 53.6°F (12°C) in November to a chilly 43.5°F (6.4°C). Weather in December »
Updated: Aug 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 is the coldest time of year?
In Herald, January registers the lowest temperatures, averaging 38.3°F (3.5°C) at the peak and 26.1°F (-3.3°C) at the lowest.
How much does it rain?
Throughout the year, there are 100.2 rainfall days, and 8.7" (221mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through March, November and December.
What is the snowiest month?
The months with the most snowfall in Herald, Illinois, are January and February, with an average 0.28" (7mm) of accumulated snow.
How many days does it snow in Herald?
In Herald, during the entire year, snow falls for 10.1 days and aggregates up to 0.91" (23mm) of snow.
What is the month with the least sunshine?
With an average of 4.4h of sunshine, January has the least sunshine of the year.
When is the lowest UV index in Herald?
January, February, November and December, with an average maximum UV index of 2, 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, 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 rainiest month?
The month with the most rainfall is April, when the rain falls for 11.3 days and typically aggregates up to 1.06" (27mm) of precipitation.
When it does not snow?
In Herald, snow does not fall in April through October.
What is the most humid month?
May and July, with an average relative humidity of 79%, are most humid months.
What are the months with the highest UV index?
May through August, with an average maximum UV index of 6, are months with the highest UV index.
When are the longest days?
With an average of 14h and 48min of daylight, June has the longest days of the year.
What month has the most sunshine?
June has the most sunshine of the year, with an average of 10.6h of sunshine.
What part of the year is the hottest?
July, on average, is the warmest month, registering a high temperature of 85.6°F (29.8°C) and a low of 68.2°F (20.1°C).
What is the driest month?
The month with the least rainfall is September, when the rain falls for 7.3 days and typically collects 0.28" (7mm) of precipitation.
What is the least humid month in Herald?
October is the least humid month, with an average relative humidity of 69%.
What is the month with the shortest days?
With an average of 9h and 36min of daylight, December has the shortest days of the year.
Average temperature
Herald, IL
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (38.3°F).
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure
Herald, 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:
29.96"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"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 (29.94"Hg).
Average wind speed
Herald, IL
- Average wind speed in January:
10mph - Average wind speed in February:
10.1mph - Average wind speed in March:
9.9mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7mph
- Average wind speed in July:
6mph - Average wind speed in August:
6mph - Average wind speed in September:
6.7mph - Average wind speed in October:
8.5mph - Average wind speed in November:
9.1mph - Average wind speed in December:
9.3mph
The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity
Herald, IL
The months with the highest relative humidity are May and July (79%).
The month with the lowest relative humidity is October (69%).
Average rainfall
Herald, IL
- Average rainfall in January:
0.67" - Average rainfall in February:
0.63" - Average rainfall in March:
0.75" - Average rainfall in April:
1.06" - Average rainfall in May:
0.98" - Average rainfall in June:
0.94"
- Average rainfall in July:
0.79" - Average rainfall in August:
0.79" - Average rainfall in September:
0.28" - Average rainfall in October:
0.71" - Average rainfall in November:
0.51" - Average rainfall in December:
0.59"
The wettest month (with the highest rainfall) is April (1.06").
The driest month (with the least rainfall) is September (0.28").
Average rainfall days
Herald, IL
- Average rainfall days in January:
5 days - Average rainfall days in February:
6.2 days - Average rainfall days in March:
9.1 days - Average rainfall days in April:
11.3 days - Average rainfall days in May:
11.9 days - Average rainfall days in June:
10.4 days
- Average rainfall days in July:
11.3 days - Average rainfall days in August:
10.2 days - Average rainfall days in September:
7.3 days - Average rainfall days in October:
6 days - Average rainfall days in November:
5.3 days - Average rainfall days in December:
6.2 days
The month with the highest number of rainy days is May (11.9 days).
The month with the least rainy days is January (5 days).
Average snowfall
Herald, IL
The months with the highest snowfall are January and February (0.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Herald, IL
- Average snowfall days in January:
3.3 days - Average snowfall days in February:
2.8 days - Average snowfall days in March:
1.3 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 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
1.9 days
The month with the highest number of snowfall days is January (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Herald, IL
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 1min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 3min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 4min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 4min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 4min
- Average sunshine in July:
10h and 3min - Average sunshine in August:
10h and 3min - Average sunshine in September:
9h and 2min - Average sunshine in October:
6h and 5min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 4min
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 24min).
Average sunshine days
Herald, IL
- Average sunshine days in January:
23.3 days - Average sunshine days in February:
19.8 days - Average sunshine days in March:
19.9 days - Average sunshine days in April:
17.7 days - Average sunshine days in May:
15.8 days - Average sunshine days in June:
16.3 days
- Average sunshine days in July:
16.9 days - Average sunshine days in August:
17.8 days - Average sunshine days in September:
20.4 days - Average sunshine days in October:
23.4 days - Average sunshine days in November:
22.3 days - Average sunshine days in December:
22.5 days
The month with the most sunshine days is October (23.4 days).
The month with the least sunshine days is May (15.8 days).
Average UV index
Herald, 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
Herald, IL
The months with the most cloud cover are January and February (Cloud cover 51).
The months with the least cloud cover are June and August (Cloud cover 27).
Average visibility
Herald, 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).
Herald, Illinois, USA
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