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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, is another subzero cold winter month in Rockdale, Illinois, with an average temperature fluctuating between 17.4°F (-8.1°C) and 29.3°F (-1.5°C). Rockdale's coldest weather arrives in January, when temperatures average a high of 29.3°F (-1.5°C) and a low of 17.4°F (-8.1°C). Weather in January »
Weather in February
February, the last month of the winter in Rockdale, is an icy month, with an average temperature fluctuating between 33.4°F (0.8°C) and 20.7°F (-6.3°C). In February, the average high-temperature registers at a wintry 33.4°F (0.8°C), nearly identical to January's 29.3°F (-1.5°C). Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Rockdale, Illinois, with an average temperature fluctuating between 31.8°F (-0.1°C) and 46.2°F (7.9°C). Rockdale's weather in March presents a rise in the average high-temperature, moving from an icy 33.4°F (0.8°C) in February to a chilly 46.2°F (7.9°C). Weather in March »
Weather in April
April is a mild spring month in Rockdale, Illinois, with temperature in the range of an average low of 41.7°F (5.4°C) and an average high of 58.1°F (14.5°C). An increase in the average high-temperature marks April, moving from March's frosty 46.2°F (7.9°C) to a refreshing 58.1°F (14.5°C). Weather in April »
Weather in May
May, the last month of the spring in Rockdale, is an agreeable month, with an average temperature varying between 52.3°F (11.3°C) and 70.3°F (21.3°C). In May, the meteorological conditions change with the average high-temperature moving from a refreshing 58.1°F (14.5°C) in April to an agreeable 70.3°F (21.3°C). Weather in May »
Weather in June
June, the first month of the summer in Rockdale, is a moderately hot month, with temperature in the range of an average low of 61.3°F (16.3°C) and an average high of 79.2°F (26.2°C). As June arrives, Rockdale's weather shows a minor increase in high-temperatures, edging from May's pleasant 70.3°F (21.3°C) to a warm 79.2°F (26.2°C). Weather in June »
Weather in July
July, like June, in Rockdale, Illinois, is another warm summer month, with temperature in the range of an average high of 81.3°F (27.4°C) and an average low of 64.8°F (18.2°C). Rockdale's warmest temperatures are experienced in July, with average high temperatures of 81.3°F (27.4°C) and lows of 64.8°F (18.2°C). July's heat index is computed to be a hot 87.8°F (31°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Rockdale, Illinois, with temperature in the range of an average low of 62.8°F (17.1°C) and an average high of 80.1°F (26.7°C). With August's arrival, Rockdale notes an average high-temperature of a still moderately hot 80.1°F (26.7°C), closely following the trend of the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Rockdale, is still a warm month, with temperature in the range of an average high of 74.7°F (23.7°C) and an average low of 56.7°F (13.7°C). Rockdale records a mild change in average high-temperature during September, easing from 80.1°F (26.7°C) in August to a still moderately hot 74.7°F (23.7°C). Weather in September »
Weather in October
October, like September, in Rockdale, Illinois, is another comfortable autumn month, with an average temperature varying between 61.3°F (16.3°C) and 45.5°F (7.5°C). Transition from September to October is accompanied by a temperature drop, with average high-temperatures decreasing from a warm 74.7°F (23.7°C) to an enjoyable 61.3°F (16.3°C). Weather in October »
Weather in November
November, the last month of the autumn in Rockdale, is also a frosty month, with an average temperature varying between 47.1°F (8.4°C) and 33.4°F (0.8°C). November implies a gentle temperature shift, with average high-temperatures reducing from October's refreshing 61.3°F (16.3°C) to a chilly 47.1°F (8.4°C). Weather in November »
Weather in December
December, the first month of the winter in Rockdale, is still a cold month, with temperature in the range of an average high of 35.1°F (1.7°C) and an average low of 25°F (-3.9°C). The move into December indicates a reduction in the average high-temperature, down from November's frosty 47.1°F (8.4°C) to a wintry 35.1°F (1.7°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest month in Rockdale?
The coldest month in Rockdale, Illinois, is January, with an average high-temperature of 29.3°F (-1.5°C) and an average low-temperature of 17.4°F (-8.1°C).
How much does it rain in Rockdale?
In Rockdale, during the entire year, the rain falls for 153.6 days and collects up to 32.72" (831mm) of precipitation.
When does it snow in Rockdale?
Months with snowfall in Rockdale are January through April, November and December.
When does it snow the most in Rockdale?
January is the month with the most snowfall in Rockdale. Snow falls for 11.9 days and accumulates 4.33" (110mm) of snow.
How many days does it snow in Rockdale?
Throughout the year, there are 38.2 snowfall days, and 14.61" (371mm) of snow is accumulated.
What is the month with the least sunshine in Rockdale?
With an average of 3.7h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index in Rockdale?
The months with the lowest UV index in Rockdale are January and December, with an average maximum UV index of 1.
What is the most humid month in Rockdale?
The most humid month in Rockdale, Illinois, is February, with an average relative humidity of 83%.
What is the driest month in Rockdale?
February is the month with the least rainfall in Rockdale, Illinois. Rain falls for 5.7 days and accumulates 1.61" (41mm) of precipitation.
When is Daylight Saving Time (DST) in Rockdale?
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 wettest month in Rockdale?
The month with the most rainfall in Rockdale, Illinois, is May, when the rain falls for 17.8 days and typically aggregates up to 4.41" (112mm) of precipitation.
When it does not snow in Rockdale?
In Rockdale, snow does not fall in May through October.
When are the longest days in Rockdale?
The month with the longest days in Rockdale is June, with an average of 15h and 6min of daylight.
What is the month with the highest UV index in Rockdale?
The months with the highest UV index in Rockdale, Illinois, are June and July, with an average maximum UV index of 6.
What is the warmest month in Rockdale?
Rockdale's July weather, with an average high temperature of 81.3°F (27.4°C) and an average low temperature of 64.8°F (18.2°C), tends to be the warmest of the year.
What month has the most sunshine in Rockdale?
The month with the most sunshine is August, with an average of 9.7h of sunshine.
What is the least humid month in Rockdale?
With an average relative humidity of 73%, October is the least humid month.
What is the month with the shortest days in Rockdale?
December has the shortest days of the year in Rockdale, Illinois, with an average of 9h and 12min of daylight.
Average temperature
Rockdale, IL
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (29.3°F).
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure
Rockdale, IL
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.1"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:
29.92"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:
30.01"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Rockdale, IL
- Average wind speed in January:
9.5mph - Average wind speed in February:
9.4mph - Average wind speed in March:
9.3mph - Average wind speed in April:
9.7mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7.2mph
- Average wind speed in July:
6.2mph - Average wind speed in August:
5.9mph - Average wind speed in September:
6.9mph - Average wind speed in October:
8.5mph - Average wind speed in November:
9.1mph - Average wind speed in December:
8.9mph
The windiest month (with the highest average wind speed) is April (9.7mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity
Rockdale, IL
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Rockdale, IL
- Average rainfall in January:
1.85" - Average rainfall in February:
1.61" - Average rainfall in March:
2.09" - Average rainfall in April:
3.62" - Average rainfall in May:
4.41" - Average rainfall in June:
4.02"
- Average rainfall in July:
3.46" - Average rainfall in August:
2.83" - Average rainfall in September:
2.48" - Average rainfall in October:
2.95" - Average rainfall in November:
1.69" - Average rainfall in December:
1.69"
The wettest month (with the highest rainfall) is May (4.41").
The driest month (with the least rainfall) is February (1.61").
Average rainfall days
Rockdale, IL
- Average rainfall days in January:
6.8 days - Average rainfall days in February:
5.7 days - Average rainfall days in March:
12.6 days - Average rainfall days in April:
16.3 days - Average rainfall days in May:
17.8 days - Average rainfall days in June:
17.8 days
- Average rainfall days in July:
17.9 days - Average rainfall days in August:
15.8 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
12.9 days - Average rainfall days in November:
9.4 days - Average rainfall days in December:
8.1 days
The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is February (5.7 days).
Average snowfall
Rockdale, IL
The month with the highest snowfall is January (4.33").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Rockdale, IL
- Average snowfall days in January:
11.9 days - Average snowfall days in February:
9.5 days - Average snowfall days in March:
5 days - Average snowfall days in April:
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:
0.2 days - Average snowfall days in November:
2.6 days - Average snowfall days in December:
8 days
The month with the highest number of snowfall days is January (11.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Rockdale, 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 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 4min - Average sunshine in August:
9h and 4min - Average sunshine in September:
8h and 3min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 1min
The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Rockdale, IL
- Average sunshine days in January:
14.4 days - Average sunshine days in February:
13.8 days - Average sunshine days in March:
14.6 days - Average sunshine days in April:
11.1 days - Average sunshine days in May:
11.6 days - Average sunshine days in June:
10.4 days
- Average sunshine days in July:
10.8 days - Average sunshine days in August:
11.8 days - Average sunshine days in September:
15 days - Average sunshine days in October:
16.5 days - Average sunshine days in November:
18.1 days - Average sunshine days in December:
15.9 days
The month with the most sunshine days is November (18.1 days).
The month with the least sunshine days is June (10.4 days).
Average UV index
Rockdale, IL
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Rockdale, IL
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility
Rockdale, IL
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
Rockdale, Illinois, USA
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