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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
Climate and monthly weather forecast
Weather in January
January, the same as December, in Rockdale, Iowa, is another subzero cold winter month, with an average temperature varying between 12.4°F (-10.9°C) and 25°F (-3.9°C). Rockdale's January weather, with an average high temperature of 25°F (-3.9°C) and an average low temperature of 12.4°F (-10.9°C), tends to be the coldest of the year. Weather in January »
Weather in February
February, the last month of the winter in Rockdale, is another freezing cold month, with temperature in the range of an average high of 28.6°F (-1.9°C) and an average low of 15.3°F (-9.3°C). Rockdale marks the arrival of February with an average high-temperature of a still freezing cold 28.6°F (-1.9°C), hardly different from January's 25°F (-3.9°C). Weather in February »
Weather in March
March, the first month of the spring in Rockdale, is a chilly month, with an average temperature ranging between max 43.3°F (6.3°C) and min 28.4°F (-2°C). Rockdale's transition into March is marked by a distinct rise in the average high-temperature, advancing from a subzero cold 28.6°F (-1.9°C) in February to a chilly 43.3°F (6.3°C). Weather in March »
Weather in April
April is a moderate spring month in Rockdale, Iowa, with an average temperature ranging between min 38.8°F (3.8°C) and max 55.9°F (13.3°C). Rockdale's April weather brings a rise in high-temperatures, moving from a chilly 43.3°F (6.3°C) in March to a refreshing 55.9°F (13.3°C). Weather in April »
Weather in May
May, the last month of the spring in Rockdale, is a comfortable month, with an average temperature ranging between min 50.2°F (10.1°C) and max 66.9°F (19.4°C). The arrival of May signals an increase in the average high-temperature, moving from 55.9°F (13.3°C) in April to a still refreshing 66.9°F (19.4°C). Weather in May »
Weather in June
June, the first month of the summer in Rockdale, is a warm month, with an average temperature fluctuating between 59.4°F (15.2°C) and 76.3°F (24.6°C). As Rockdale welcomes June, the average high-temperature sees a rise, transitioning from an enjoyable 66.9°F (19.4°C) in May to a warm 76.3°F (24.6°C). Weather in June »
Weather in July
July, like June, in Rockdale, Iowa, is another warm summer month, with an average temperature fluctuating between 79.7°F (26.5°C) and 62.8°F (17.1°C). July is the month when Rockdale sees the highest average temperatures, with a high of 79.7°F (26.5°C) and a low of 62.8°F (17.1°C). Weather in July »
Weather in August
August, the last month of the summer in Rockdale, is another warm month, with an average temperature ranging between max 78.6°F (25.9°C) and min 60.4°F (15.8°C). Transitioning into August, Rockdale experiences an average high-temperature of a still warm 78.6°F (25.9°C), marking a minor shift from the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Rockdale, Iowa, with an average temperature fluctuating between 72.5°F (22.5°C) and 53.2°F (11.8°C). In Rockdale, the average high-temperature in September slightly decreases from a warm 78.6°F (25.9°C) in August to an agreeable 72.5°F (22.5°C). Weather in September »
Weather in October
October, like September, is another refreshing autumn month in Rockdale, Iowa, with an average temperature ranging between max 58.1°F (14.5°C) and min 41.9°F (5.5°C). October's arrival sees a clear drop in the average high-temperature, decreasing from September's agreeable 72.5°F (22.5°C) to a mild 58.1°F (14.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Rockdale, is another chilly month, with an average temperature varying between 43.9°F (6.6°C) and 30.6°F (-0.8°C). The shift from October to November involves a decrease in the average high-temperature, dropping from a moderate 58.1°F (14.5°C) to a chilly 43.9°F (6.6°C). Weather in November »
Weather in December
The first month of the winter, December, is also a subzero cold month in Rockdale, Iowa, with an average temperature ranging between max 31.5°F (-0.3°C) and min 21°F (-6.1°C). December brings a decrease in the average high-temperature, shifting from a frosty 43.9°F (6.6°C) in November to a subzero cold 31.5°F (-0.3°C). Weather in December »
Updated: Jun 8, 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 Rockdale, January records the average lowest temperatures, peaking at 25°F (-3.9°C) and reaching a low of 12.4°F (-10.9°C).
What are the most humid months in Rockdale?
The months with the highest humidity are January and February, with an average relative humidity of 87%.
What is the driest month?
January and February are months with the least rain when the rain falls for 4.8 days and typically aggregates up to 1.14" (29mm) of rain.
How many days does it rain?
In Rockdale, during the entire year, the rain falls for 135.3 days and collects up to 27.4" (696mm) of precipitation.
When does it snow?
Months with snowfall are January through April, October through December.
When does it snow the most?
The month with the most snowfall in Rockdale is January, when snow falls for 12.8 days and typically aggregates up to 4.88" (124mm) of snow.
How many days does it snow?
In Rockdale, during the entire year, snow falls for 43.9 days and aggregates up to 17.09" (434mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 3.5h of sunshine.
What are the months with the lowest UV index?
The months with the lowest UV index are January, November and December, with an average maximum UV index of 1.
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 wettest months are May and June, with an average 3.7" (94mm) of rainfall.
When it does not snow?
May through September are months without snowfall.
When are the longest days?
With an average of 15h and 12min of daylight, June has the longest days of the year.
When is the highest UV index?
June is the month with the highest UV index, with an average maximum UV index of 6.
What time of the year is the hottest?
In Rockdale, the average temperatures in July are the highest, with a peak at 79.7°F (26.5°C) and a low of 62.8°F (17.1°C).
What are the months with the most sunshine?
The months with the most sunshine are July and August, with an average of 9.7h of sunshine.
What is the least humid month?
With an average relative humidity of 76%, October is the least humid month.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 6min of daylight.
Average temperature
Rockdale, IA
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (25°F).
The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (12.4°F).
Average pressure
Rockdale, IA
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.12"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:
29.9"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"Hg - Average pressure in November:
30.08"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 (29.9"Hg).
Average wind speed
Rockdale, IA
- Average wind speed in January:
10.2mph - Average wind speed in February:
10.1mph - Average wind speed in March:
10.1mph - Average wind speed in April:
10.4mph - Average wind speed in May:
8.9mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.8mph - Average wind speed in September:
7.8mph - Average wind speed in October:
9.4mph - Average wind speed in November:
10.1mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity
Rockdale, IA
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is October (76%).
Average rainfall
Rockdale, IA
- Average rainfall in January:
1.14" - Average rainfall in February:
1.14" - Average rainfall in March:
1.61" - Average rainfall in April:
2.91" - Average rainfall in May:
3.7" - Average rainfall in June:
3.7"
- Average rainfall in July:
3.27" - Average rainfall in August:
1.73" - Average rainfall in September:
2.6" - Average rainfall in October:
2.56" - Average rainfall in November:
1.65" - Average rainfall in December:
1.38"
The wettest months (with the highest rainfall) are May and June (3.7").
The driest months (with the least rainfall) are January and February (1.14").
Average rainfall days
Rockdale, IA
- Average rainfall days in January:
4.8 days - Average rainfall days in February:
4.4 days - Average rainfall days in March:
11.1 days - Average rainfall days in April:
15.1 days - Average rainfall days in May:
17.7 days - Average rainfall days in June:
17.3 days
- Average rainfall days in July:
15 days - Average rainfall days in August:
12.1 days - Average rainfall days in September:
11.4 days - Average rainfall days in October:
11.7 days - Average rainfall days in November:
8.4 days - Average rainfall days in December:
6.3 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (4.4 days).
Average snowfall
Rockdale, IA
The month with the highest snowfall is January (4.88").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Rockdale, IA
- Average snowfall days in January:
12.8 days - Average snowfall days in February:
10 days - Average snowfall days in March:
5.8 days - Average snowfall days in April:
2 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:
0.6 days - Average snowfall days in November:
3.7 days - Average snowfall days in December:
9 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Rockdale, IA
- 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 0min - 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 6min).
- Average sunshine in January:
3h and 3min - Average sunshine in February:
3h and 4min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 1min - Average sunshine in May:
8h and 1min - Average sunshine in June:
9h and 2min
- 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 1min - Average sunshine in November:
4h and 5min - Average sunshine in December:
4h and 0min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days
Rockdale, IA
- Average sunshine days in January:
15.7 days - Average sunshine days in February:
14.7 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
11.8 days - Average sunshine days in May:
12.1 days - Average sunshine days in June:
10.3 days
- Average sunshine days in July:
13.8 days - Average sunshine days in August:
17.4 days - Average sunshine days in September:
17.2 days - Average sunshine days in October:
17 days - Average sunshine days in November:
17.5 days - Average sunshine days in December:
17.5 days
The months with the most sunshine days are November and December (17.5 days).
The month with the least sunshine days is June (10.3 days).
Average UV index
Rockdale, IA
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover
Rockdale, IA
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility
Rockdale, IA
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).