Climate and monthly weather forecastMonticello, IA
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Monticello, Iowa, with an average temperature ranging between max 25.2°F (-3.8°C) and min 13.3°F (-10.4°C). Monticello's January weather, with an average high temperature of 25.2°F (-3.8°C) and an average low temperature of 13.3°F (-10.4°C), tends to be the coldest of the year. Weather in January »Weather in February
The last month of the winter, February, is also a subzero cold month in Monticello, Iowa, with an average temperature ranging between min 16°F (-8.9°C) and max 28.9°F (-1.7°C). February's beginning signals an average high-temperature of a still subzero cold 28.9°F (-1.7°C), barely different from January's 25.2°F (-3.8°C). Weather in February »Weather in March
The first month of the spring, March, is a chilly month in Monticello, Iowa, with an average temperature ranging between max 44.2°F (6.8°C) and min 29.5°F (-1.4°C). A notable increase in the average high-temperature is observed during March, soaring from a freezing cold 28.9°F (-1.7°C) in February to a chilly 44.2°F (6.8°C). Weather in March »Weather in April
April is a refreshing spring month in Monticello, Iowa, with an average temperature fluctuating between 39.9°F (4.4°C) and 56.1°F (13.4°C). April's arrival sees a rise in the average high-temperature, jumping from March's chilly 44.2°F (6.8°C) to a refreshing 56.1°F (13.4°C). Weather in April »Weather in May
May, the last month of the spring in Monticello, is a pleasant month, with an average temperature varying between 51.1°F (10.6°C) and 68.4°F (20.2°C). May's arrival sees a rise in the average high-temperature, jumping from April's refreshing 56.1°F (13.4°C) to a pleasant 68.4°F (20.2°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Monticello, Iowa, with an average temperature fluctuating between 77°F (25°C) and 60.4°F (15.8°C). Monticello's transition into June is noticed by a slight rise in the average high-temperature, advancing from a pleasant 68.4°F (20.2°C) in May to a warm 77°F (25°C). Weather in June »Weather in July
July, like June, in Monticello, Iowa, is another warm summer month, with an average temperature fluctuating between 63.3°F (17.4°C) and 80.1°F (26.7°C). The warmest period tends to be July, when average temperatures fluctuate between a high of 80.1°F (26.7°C) and a low of 63.3°F (17.4°C). Weather in July »Weather in August
August, the last month of the summer in Monticello, is another warm month, with an average temperature varying between 78.6°F (25.9°C) and 60.6°F (15.9°C). Monticello records an average high-temperature of a still moderately hot 78.6°F (25.9°C) in August, closely mirroring the climate of the previous month. Weather in August »Weather in September
The first month of the autumn, September, is still a pleasant month in Monticello, Iowa, with an average temperature ranging between max 73°F (22.8°C) and min 54.3°F (12.4°C). The start of September signals a gentle decrease in the average high-temperature, transitioning from a moderately hot 78.6°F (25.9°C) in August to an agreeable 73°F (22.8°C). Weather in September »Weather in October
October, like September, is another refreshing autumn month in Monticello, Iowa, with an average temperature varying between 43.2°F (6.2°C) and 58.6°F (14.8°C). The onset of October brings a distinct decrease in the average high-temperature, receding from a pleasant 73°F (22.8°C) in September to a moderate 58.6°F (14.8°C). Weather in October »Weather in November
November, the last month of the autumn in Monticello, is another chilly month, with an average temperature fluctuating between 44.6°F (7°C) and 31.3°F (-0.4°C). The start of November comes with a reduction in the average high-temperature, receding from a moderate 58.6°F (14.8°C) in October to a chilly 44.6°F (7°C). Weather in November »Weather in December
The first month of the winter, December, is still a freezing cold month in Monticello, Iowa, with an average temperature ranging between min 21.4°F (-5.9°C) and max 31.8°F (-0.1°C). The onset of December brings a small change in high-temperatures, falling from a frosty 44.6°F (7°C) in November to a freezing cold 31.8°F (-0.1°C). Weather in December »Updated: Aug 27, 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
January, with an average high of 25.2°F (-3.8°C) and a low of 13.3°F (-10.4°C), signifies the coldest month of the year.
The months with the highest humidity are January and February, with an average relative humidity of 86%.
The months with the least rainfall are January and February Rain falls for 5.2 days and accumulates 1.26" (32mm) of rain.
Throughout the year, there are 142.5 rainfall days, and 28.27" (718mm) of precipitation is accumulated.
January through April, October through December are months with snowfall.
January is the month with the most snowfall in Monticello. Snow falls for 12.1 days and accumulates 5.04" (128mm) of snow.
Throughout the year, there are 43.2 snowfall days, and 17.17" (436mm) of snow is accumulated.
With an average of 3.8h of sunshine, January has the least sunshine of the year.
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Monticello.
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 18.6 days and typically aggregates up to 4.25" (108mm) of precipitation.
In Monticello, snow does not fall in May through September.
The month with the longest days is June, with an average of 15h and 12min of daylight.
June and July, with an average maximum UV index of 6, are months with the highest UV index.
The month of July, characterized by an average high of 80.1°F (26.7°C) and a low of 63.3°F (17.4°C), is recognized as the warmest.
July and August, with an average of 9.9h of sunshine, are months with the most sunshine.
October is the least humid month, with an average relative humidity of 74%.
December has the shortest days of the year, with an average of 9h and 12min of daylight.
Average temperature
Monticello, IA
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (25.2°F).
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).
Average pressure
Monticello, 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:
29.94"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:
30.09"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
Monticello, IA
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9.1mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
7mph - Average wind speed in August:
6.9mph - Average wind speed in September:
8mph - Average wind speed in October:
9.5mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity
Monticello, IA
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Monticello, IA
- Average rainfall in January:
1.26" - Average rainfall in February:
1.26" - Average rainfall in March:
1.85" - Average rainfall in April:
3.15" - Average rainfall in May:
4.25" - Average rainfall in June:
3.78"
- Average rainfall in July:
2.83" - Average rainfall in August:
1.77" - Average rainfall in September:
2.52" - Average rainfall in October:
2.52" - Average rainfall in November:
1.65" - Average rainfall in December:
1.42"
The wettest month (with the highest rainfall) is May (4.25").
The driest months (with the least rainfall) are January and February (1.26").
Average rainfall days
Monticello, IA
- Average rainfall days in January:
5.2 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
11.9 days - Average rainfall days in April:
16 days - Average rainfall days in May:
18.6 days - Average rainfall days in June:
17.3 days
- Average rainfall days in July:
15.8 days - Average rainfall days in August:
12.5 days - Average rainfall days in September:
11.4 days - Average rainfall days in October:
11.9 days - Average rainfall days in November:
8.9 days - Average rainfall days in December:
7.7 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is January (5.2 days).
Average snowfall
Monticello, IA
The month with the highest snowfall is January (5.04").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Monticello, IA
- Average snowfall days in January:
12.1 days - Average snowfall days in February:
9.5 days - Average snowfall days in March:
6 days - Average snowfall days in April:
1.6 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:
4 days - Average snowfall days in December:
9.4 days
The month with the highest number of snowfall days is January (12.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Monticello, IA
- Average daylight in January:
9h and 30min - 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 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - 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 48min - Average daylight in December:
9h and 12min
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:
3h and 48min - Average sunshine in February:
4h and 0min - Average sunshine in March:
6h and 18min - Average sunshine in April:
7h and 30min - Average sunshine in May:
8h and 24min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
9h and 54min - Average sunshine in August:
9h and 54min - Average sunshine in September:
9h and 6min - Average sunshine in October:
5h and 18min - Average sunshine in November:
5h and 18min - Average sunshine in December:
4h and 12min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Monticello, IA
- Average sunshine days in January:
15.8 days - Average sunshine days in February:
15.3 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
11.1 days - Average sunshine days in May:
10.6 days - Average sunshine days in June:
10.5 days
- Average sunshine days in July:
12.3 days - Average sunshine days in August:
16.7 days - Average sunshine days in September:
17 days - Average sunshine days in October:
16.9 days - Average sunshine days in November:
16.8 days - Average sunshine days in December:
16.7 days
The month with the most sunshine days is September (17 days).
The month with the least sunshine days is June (10.5 days).
Average UV index
Monticello, IA
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
Monticello, IA
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Monticello, 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).
