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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, the same as December, in Marengo, Iowa, is another subzero cold winter month, with an average temperature ranging between max 27°F (-2.8°C) and min 14.4°F (-9.8°C). Marengo's January weather reaches an average high of 27°F (-2.8°C) and an average low of 14.4°F (-9.8°C), making it the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Marengo, Iowa, with temperature in the range of an average high of 30.9°F (-0.6°C) and an average low of 18°F (-7.8°C). The onset of February marks an average high-temperature of a still subzero cold 30.9°F (-0.6°C), hardly differing from January's 27°F (-2.8°C). Weather in February »
Weather in March
March, the first month of the spring in Marengo, is a frosty month, with temperature in the range of an average low of 31.5°F (-0.3°C) and an average high of 45.9°F (7.7°C). The onset of March brings a clear temperature shift, with the average high-temperature escalating from a subzero cold 30.9°F (-0.6°C) in February to a frosty 45.9°F (7.7°C). Weather in March »
Weather in April
April in Marengo, Iowa, is a mild spring month, with an average temperature ranging between max 58.1°F (14.5°C) and min 41.4°F (5.2°C). Marengo, Iowa, in April shows a temperature shift, moving from an average high of a frosty 45.9°F (7.7°C) in March to a moderate 58.1°F (14.5°C). Weather in April »
Weather in May
May, the last month of the spring in Marengo, is an agreeable month, with an average temperature ranging between min 52.3°F (11.3°C) and max 69.1°F (20.6°C). In Marengo, the onset of May comes with an increased average high-temperature, moving from April's mild 58.1°F (14.5°C) to an agreeable 69.1°F (20.6°C). Weather in May »
Weather in June
June, the first month of the summer in Marengo, is a warm month, with an average temperature ranging between max 78.1°F (25.6°C) and min 61.9°F (16.6°C). June's arrival coincides with a temperature rise, moving from May's agreeable 69.1°F (20.6°C) to a moderately hot 78.1°F (25.6°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Marengo, Iowa, with temperature in the range of an average low of 64.8°F (18.2°C) and an average high of 81°F (27.2°C). The warmest period tends to be July, when average temperatures fluctuate between a high of 81°F (27.2°C) and a low of 64.8°F (18.2°C). The heat index value during July is evaluated at a tropical 87.8°F (31°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Marengo, Iowa, with an average temperature varying between 62.1°F (16.7°C) and 79.7°F (26.5°C). August's average high-temperature is a still warm 79.7°F (26.5°C), maintaining a close comparison with July's 81°F (27.2°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Marengo, Iowa, with an average temperature ranging between max 74.8°F (23.8°C) and min 55.2°F (12.9°C). Marengo observes an average high-temperature of a still moderately hot 74.8°F (23.8°C) in September, barely different from 79.7°F (26.5°C) in August. Weather in September »
Weather in October
October, the same as September, in Marengo, Iowa, is another mild autumn month, with an average temperature varying between 44.4°F (6.9°C) and 60.1°F (15.6°C). A distinct shift in the average high-temperature is signaled in October, moving down from a warm 74.8°F (23.8°C) in September to a refreshing 60.1°F (15.6°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Marengo, Iowa, with temperature in the range of an average high of 46°F (7.8°C) and an average low of 32.2°F (0.1°C). During Marengo's transition into November, the average high-temperature lessens, moving from a mild 60.1°F (15.6°C) in October to a chilly 46°F (7.8°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Marengo, Iowa, with an average temperature ranging between min 22.5°F (-5.3°C) and max 33.4°F (0.8°C). December's onset corresponds with a shift in the average high-temperature, moving from a frosty 46°F (7.8°C) in November to a wintry 33.4°F (0.8°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
What part of the year is the coldest in Marengo?
Marengo notes the coldest temperatures in January, with a average high of 27°F (-2.8°C) and a low of 14.4°F (-9.8°C).
What are the most humid months in Marengo?
January, February and July, with an average relative humidity of 84%, are most humid months in Marengo.
What is the driest month in Marengo?
The month with the least rainfall in Marengo is January, when the rain falls for 4.9 days and typically collects 1.14" (29mm) of precipitation.
How many days does it rain in Marengo?
Throughout the year, there are 141.8 rainfall days, and 29.61" (752mm) of precipitation is accumulated.
When does it snow in Marengo?
January through May, October through December are months with snowfall.
What is the snowiest month in Marengo?
The month with the most snowfall in Marengo, Iowa, is January, when snow falls for 9.4 days and typically aggregates up to 5" (127mm) of snow.
How much does it snow in Marengo?
Throughout the year, in Marengo, there are 36.9 snowfall days, and 15.91" (404mm) of snow is accumulated.
What is the month with the least sunshine in Marengo?
With an average of 4.1h of sunshine, January has the least sunshine of the year in Marengo, Iowa.
What is the month with the lowest UV index in Marengo?
The month with the lowest UV index in Marengo is January, with an average maximum UV index of 1.
When is Daylight Saving Time (DST) in Marengo?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Marengo, Iowa, 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 Marengo?
May is the month with the most rainfall. Rain falls for 18.6 days and accumulates 4.33" (110mm) of precipitation.
When it does not snow in Marengo?
June through September are months without snowfall.
When are the longest days in Marengo?
With an average of 15h and 12min of daylight, June has the longest days of the year.
When is the highest UV index in Marengo?
The months with the highest UV index in Marengo are June and July, with an average maximum UV index of 6.
What is the hottest time of year in Marengo?
Marengo records the warmest temperatures in July, averaging a high of 81°F (27.2°C) and a low of 64.8°F (18.2°C).
What month has the most sunshine in Marengo?
July has the most sunshine of the year, with an average of 9.9h of sunshine.
What is the least humid month in Marengo?
October is the least humid month in Marengo, Iowa, with an average relative humidity of 72%.
What is the month with the shortest days in Marengo?
December has the shortest days of the year in Marengo, Iowa, with an average of 9h and 12min of daylight.
Average temperature
Marengo, IA
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (27°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 (14.4°F).
Average pressure
Marengo, IA
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.13"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.89"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:
30.09"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed
Marengo, IA
- Average wind speed in January:
10.7mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.5mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9.1mph - Average wind speed in June:
8mph
- Average wind speed in July:
7mph - Average wind speed in August:
7mph - Average wind speed in September:
8mph - Average wind speed in October:
9.7mph - Average wind speed in November:
10.4mph - Average wind speed in December:
10.1mph
The windiest months (with the highest average wind speed) are January and April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity
Marengo, IA
The months with the highest relative humidity are January, February and July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Marengo, IA
- Average rainfall in January:
1.14" - Average rainfall in February:
1.26" - Average rainfall in March:
1.97" - Average rainfall in April:
3.19" - Average rainfall in May:
4.33" - Average rainfall in June:
4.17"
- Average rainfall in July:
3.23" - Average rainfall in August:
2.28" - Average rainfall in September:
2.76" - Average rainfall in October:
2.24" - Average rainfall in November:
1.57" - Average rainfall in December:
1.46"
The wettest month (with the highest rainfall) is May (4.33").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days
Marengo, IA
- Average rainfall days in January:
4.9 days - Average rainfall days in February:
4.3 days - Average rainfall days in March:
10.7 days - Average rainfall days in April:
15.3 days - Average rainfall days in May:
18.6 days - Average rainfall days in June:
18.8 days
- Average rainfall days in July:
16.5 days - Average rainfall days in August:
14.1 days - Average rainfall days in September:
12.4 days - Average rainfall days in October:
11.2 days - Average rainfall days in November:
8.6 days - Average rainfall days in December:
6.4 days
The month with the highest number of rainy days is June (18.8 days).
The month with the least rainy days is February (4.3 days).
Average snowfall
Marengo, IA
The month with the highest snowfall is January (5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Marengo, IA
- Average snowfall days in January:
9.4 days - Average snowfall days in February:
9.7 days - Average snowfall days in March:
5.5 days - Average snowfall days in April:
1.5 days - Average snowfall days in May:
0.1 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:
2.5 days - Average snowfall days in December:
7.7 days
The month with the highest number of snowfall days is February (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Marengo, IA
- 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 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 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 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
4h and 1min - Average sunshine in February:
4h and 1min - Average sunshine in March:
6h and 2min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 2min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 3min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days
Marengo, IA
- Average sunshine days in January:
18.3 days - Average sunshine days in February:
15.4 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
12 days - Average sunshine days in May:
9.9 days - Average sunshine days in June:
9.6 days
- Average sunshine days in July:
10.4 days - Average sunshine days in August:
13.7 days - Average sunshine days in September:
15.8 days - Average sunshine days in October:
18 days - Average sunshine days in November:
18 days - Average sunshine days in December:
17.8 days
The month with the most sunshine days is January (18.3 days).
The month with the least sunshine days is June (9.6 days).
Average UV index
Marengo, IA
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Marengo, IA
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility
Marengo, IA
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Marengo, Iowa, USA
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