Climate and monthly weather forecastRiverdale, IA
Climate and monthly weather forecast
Weather in January
January, the same as December, in Riverdale, Iowa, is another subzero cold winter month, with an average temperature varying between 15.4°F (-9.2°C) and 28.2°F (-2.1°C). Riverdale notes the coldest temperatures in January, with a high average of 28.2°F (-2.1°C) and a low of 15.4°F (-9.2°C). Weather in January »Weather in February
February, the last month of the winter in Riverdale, is a wintry month, with an average temperature ranging between max 32.7°F (0.4°C) and min 19.6°F (-6.9°C). In Riverdale, February's average high-temperature stands at a wintry 32.7°F (0.4°C), closely related to the preceding month. Weather in February »Weather in March
The first month of the spring, March, is a chilly month in Riverdale, Iowa, with an average temperature ranging between max 46.8°F (8.2°C) and min 32°F (0°C). Riverdale's weather in March presents a rise in the average high-temperature, moving from a cold 32.7°F (0.4°C) in February to a chilly 46.8°F (8.2°C). Weather in March »Weather in April
April in Riverdale, Iowa, is a refreshing spring month, with an average temperature ranging between max 59°F (15°C) and min 42.4°F (5.8°C). As Riverdale welcomes April, the average high-temperature sees a rise, transitioning from a chilly 46.8°F (8.2°C) in March to a mild 59°F (15°C). Weather in April »Weather in May
The last month of the spring, May, is an agreeable month in Riverdale, Iowa, with an average temperature varying between 70.3°F (21.3°C) and 53.4°F (11.9°C). With the onset of May, Riverdale's weather sees a temperature rise, transitioning from a refreshing 59°F (15°C) in April to an agreeable 70.3°F (21.3°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Riverdale, Iowa, with an average temperature ranging between min 61.9°F (16.6°C) and max 79°F (26.1°C). June brings a slight increase in the average high-temperature, progressing from an agreeable 70.3°F (21.3°C) in May to a moderately hot 79°F (26.1°C). Weather in June »Weather in July
July, like June, in Riverdale, Iowa, is a moderately hot summer month, with temperature in the range of an average high of 81.7°F (27.6°C) and an average low of 64.8°F (18.2°C). Riverdale's temperatures tend to reach their peak averages in July, with a high of 81.7°F (27.6°C) and a low of 64.8°F (18.2°C). During July, the heat index is evaluated at a tropical 89.6°F (32°C). Weather in July »Weather in August
August, the last month of the summer in Riverdale, is also a moderately hot month, with temperature in the range of an average low of 62.4°F (16.9°C) and an average high of 80.6°F (27°C). The shift to August signals an average high-temperature of a still moderately hot 80.6°F (27°C), subtly varied from July's 81.7°F (27.6°C). Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Riverdale, Iowa, with an average temperature fluctuating between 75.4°F (24.1°C) and 56.3°F (13.5°C). The advent of September signifies a minor shift to an average high-temperature of a still warm 75.4°F (24.1°C), aligning closely with August. Weather in September »Weather in October
October, the same as September, is another enjoyable autumn month in Riverdale, Iowa, with an average temperature fluctuating between 61.3°F (16.3°C) and 45°F (7.2°C). The shift from September to October involves a decrease in the average high-temperature, dropping from a moderately hot 75.4°F (24.1°C) to an enjoyable 61.3°F (16.3°C). Weather in October »Weather in November
The last month of the autumn, November, is also a frosty month in Riverdale, Iowa, with an average temperature ranging between max 46.9°F (8.3°C) and min 33.3°F (0.7°C). A decrease in the average high-temperature marks November, falling from October's enjoyable 61.3°F (16.3°C) to a frosty 46.9°F (8.3°C). Weather in November »Weather in December
The first month of the winter, December, is still a cold month in Riverdale, Iowa, with an average temperature varying between 34.5°F (1.4°C) and 23.9°F (-4.5°C). The shift from November to December corresponds with a decrease in the average high-temperature, down to a wintry 34.5°F (1.4°C) from a chilly 46.9°F (8.3°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
Riverdale witnesses the coldest weather in January, with temperatures averaging a high of 28.2°F (-2.1°C) and a low of 15.4°F (-9.2°C).
January and July, with an average relative humidity of 83%, are most humid months in Riverdale, Iowa.
Throughout the year, in Riverdale, Iowa, there are 99.4 rainfall days, and 9.57" (243mm) of precipitation is accumulated.
January through April, September through December are months with snowfall in Riverdale.
January is the month with the most snowfall in Riverdale. Snow falls for 7.2 days and accumulates 1.26" (32mm) of snow.
Throughout the year, in Riverdale, Iowa, there are 24.5 snowfall days, and 4.09" (104mm) of snow is accumulated.
January has the least sunshine of the year in Riverdale, with an average of 3.9h of sunshine.
With an average maximum UV index of 1, January is the month with the lowest UV index in Riverdale, Iowa.
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.
The month with the most rainfall is May, when the rain falls for 13.4 days and typically aggregates up to 1.61" (41mm) of precipitation.
In Riverdale, Iowa, snow does not fall in May through August.
June has the longest days of the year, with an average of 15h and 6min of daylight.
July stands out as Riverdale's warmest month, with an average high-temperature of 81.7°F (27.6°C) and a low-temperature of 64.8°F (18.2°C).
With an average of 10.1h of sunshine, July has the most sunshine of the year in Riverdale.
July is the month with the highest UV index in Riverdale, with an average maximum UV index of 6.
The least humid month in Riverdale is October, with an average relative humidity of 71%.
The month with the least rainfall is December, when the rain falls for 4.1 days and typically collects 0.35" (9mm) of precipitation.
December has the shortest days of the year, with an average of 9h and 12min of daylight.
Average temperature
Riverdale, IA
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.2°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 (15.4°F).
Average pressure
Riverdale, 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:
29.93"Hg - Average pressure in May:
29.95"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:
30.02"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.11"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
Riverdale, IA
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.6mph - Average wind speed in May:
9mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.7mph - Average wind speed in September:
7.8mph - Average wind speed in October:
9.5mph - Average wind speed in November:
10.3mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity
Riverdale, IA
The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Riverdale, IA
- Average rainfall in January:
0.43" - Average rainfall in February:
0.39" - Average rainfall in March:
0.63" - Average rainfall in April:
1.02" - Average rainfall in May:
1.61" - Average rainfall in June:
1.26"
- Average rainfall in July:
1.18" - Average rainfall in August:
0.71" - Average rainfall in September:
0.75" - Average rainfall in October:
0.71" - Average rainfall in November:
0.51" - Average rainfall in December:
0.35"
The wettest month (with the highest rainfall) is May (1.61").
The driest month (with the least rainfall) is December (0.35").
Average rainfall days
Riverdale, IA
- Average rainfall days in January:
3.2 days - Average rainfall days in February:
3.3 days - Average rainfall days in March:
8.2 days - Average rainfall days in April:
11.8 days - Average rainfall days in May:
13.4 days - Average rainfall days in June:
13.1 days
- Average rainfall days in July:
11.2 days - Average rainfall days in August:
10.7 days - Average rainfall days in September:
6.9 days - Average rainfall days in October:
8.4 days - Average rainfall days in November:
5.1 days - Average rainfall days in December:
4.1 days
The month with the highest number of rainy days is May (13.4 days).
The month with the least rainy days is January (3.2 days).
Average snowfall
Riverdale, IA
The month with the highest snowfall is January (1.26").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days
Riverdale, IA
- Average snowfall days in January:
7.2 days - Average snowfall days in February:
6.2 days - Average snowfall days in March:
3.1 days - Average snowfall days in April:
0.8 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:
0.1 days - Average snowfall days in October:
0.6 days - Average snowfall days in November:
1.5 days - Average snowfall days in December:
5 days
The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Riverdale, IA
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 12min
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 54min - Average sunshine in February:
4h and 6min - Average sunshine in March:
6h and 24min - Average sunshine in April:
7h and 36min - Average sunshine in May:
8h and 36min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
10h and 6min - Average sunshine in August:
9h and 54min - Average sunshine in September:
9h and 6min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 12min - Average sunshine in December:
4h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days
Riverdale, IA
- Average sunshine days in January:
22.2 days - Average sunshine days in February:
19.5 days - Average sunshine days in March:
19.8 days - Average sunshine days in April:
16.7 days - Average sunshine days in May:
14.6 days - Average sunshine days in June:
14.4 days
- Average sunshine days in July:
16.2 days - Average sunshine days in August:
17.4 days - Average sunshine days in September:
20.9 days - Average sunshine days in October:
21.3 days - Average sunshine days in November:
22.1 days - Average sunshine days in December:
22.4 days
The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is June (14.4 days).
Average UV index
Riverdale, IA
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Riverdale, IA
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Riverdale, IA
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).
