Climate and monthly weather forecastDecatur City, IA
Climate and monthly weather forecast
Weather in January
January, like December, is another subzero cold winter month in Decatur City, Iowa, with temperature in the range of an average high of 30.6°F (-0.8°C) and an average low of 16.9°F (-8.4°C). January is the coldest month of the year, registering average temperatures as high as 30.6°F (-0.8°C) and as low as 16.9°F (-8.4°C). Weather in January »Weather in February
The last month of the winter, February, is a wintry month in Decatur City, Iowa, with an average temperature varying between 34.3°F (1.3°C) and 19.8°F (-6.8°C). February's arrival brings an average high-temperature of an icy 34.3°F (1.3°C), slightly deviating from January's 30.6°F (-0.8°C). Weather in February »Weather in March
The first month of the spring, March, is a frosty month in Decatur City, Iowa, with an average temperature fluctuating between 48.9°F (9.4°C) and 33.4°F (0.8°C). Decatur City's transition into March is marked by a distinct rise in the average high-temperature, advancing from an icy 34.3°F (1.3°C) in February to a frosty 48.9°F (9.4°C). Weather in March »Weather in April
April in Decatur City, Iowa, is a moderate spring month, with an average temperature fluctuating between 43°F (6.1°C) and 60.4°F (15.8°C). The beginning of April signals a rise in the average high-temperature, moving from a chilly 48.9°F (9.4°C) in March to a refreshing 60.4°F (15.8°C). Weather in April »Weather in May
The last month of the spring, May, is an agreeable month in Decatur City, Iowa, with an average temperature fluctuating between 69.4°F (20.8°C) and 53.1°F (11.7°C). As Decatur City welcomes May, the average high-temperature sees a rise, transitioning from a moderate 60.4°F (15.8°C) in April to a pleasant 69.4°F (20.8°C). Weather in May »Weather in June
June, the first month of the summer in Decatur City, is a warm month, with an average temperature fluctuating between 79.9°F (26.6°C) and 63.1°F (17.3°C). A rise in the average high-temperature is observed during June, moving from an agreeable 69.4°F (20.8°C) in May to a moderately hot 79.9°F (26.6°C). Weather in June »Weather in July
July, like June, in Decatur City, Iowa, is another warm summer month, with an average temperature ranging between min 66°F (18.9°C) and max 83.5°F (28.6°C). Decatur City experiences its highest average temperatures in July, reaching a peak of 83.5°F (28.6°C) and a minimum of 66°F (18.9°C). For July, the heat index is calculated to be a tropical 93.2°F (34°C). Weather in July »Weather in August
August, the last month of the summer in Decatur City, is another warm month, with an average temperature varying between 63.5°F (17.5°C) and 81.9°F (27.7°C). The advent of August reveals an average high-temperature of a still warm 81.9°F (27.7°C), showing minimal difference from the prior month. Weather in August »Weather in September
September, the first month of the autumn in Decatur City, is also a moderately hot month, with temperature in the range of an average low of 56.3°F (13.5°C) and an average high of 76.1°F (24.5°C). September marks a gentle change in average high-temperature, declining from August's 81.9°F (27.7°C) to a still moderately hot 76.1°F (24.5°C). Weather in September »Weather in October
October, like September, in Decatur City, Iowa, is another refreshing autumn month, with an average temperature ranging between min 44.4°F (6.9°C) and max 61.7°F (16.5°C). The beginning of October signals a clear reduction in the average high-temperature, falling from a warm 76.1°F (24.5°C) in September to a refreshing 61.7°F (16.5°C). Weather in October »Weather in November
The last month of the autumn, November, is also a frosty month in Decatur City, Iowa, with temperature in the range of an average low of 33.1°F (0.6°C) and an average high of 48.6°F (9.2°C). The commencement of November indicates a shift in the average high-temperature, receding from October's comfortable 61.7°F (16.5°C) to a chilly 48.6°F (9.2°C). Weather in November »Weather in December
December, the first month of the winter in Decatur City, is still a cold month, with an average temperature ranging between min 23.4°F (-4.8°C) and max 35.6°F (2°C). The transition into December involves a decrease in the average high-temperature, falling from a chilly 48.6°F (9.2°C) in November to an icy 35.6°F (2°C). Weather in December »Updated: Aug 25, 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
Decatur City witnesses the coldest weather in January, with temperatures averaging a high of 30.6°F (-0.8°C) and a low of 16.9°F (-8.4°C).
January and December are months with the least rain when the rain falls for 4.8 days and typically aggregates up to 0.67" (17mm) of rain.
In Decatur City, during the entire year, the rain falls for 132.4 days and collects up to 20.24" (514mm) of precipitation.
Months with snowfall in Decatur City are January through May, October through December.
The month with the most snowfall is January, when snow falls for 8.6 days and typically aggregates up to 2.72" (69mm) of snow.
In Decatur City, during the entire year, snow falls for 30.2 days and aggregates up to 10.16" (258mm) of snow.
With an average of 4.4h of sunshine, January has the least sunshine of the year.
The month with the lowest UV index is January, with an average maximum UV index of 1.
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.
With an average relative humidity of 83%, June is the most humid month.
The month with the most rainfall in Decatur City is June, when the rain falls for 17.3 days and typically aggregates up to 3.43" (87mm) of precipitation.
June through September are months without snowfall.
With an average of 15h and 0min of daylight, June has the longest days of the year.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
July is the warmest month, exhibiting average temperatures of 83.5°F (28.6°C) at the peak and 66°F (18.9°C) at the base.
July has the most sunshine of the year, with an average of 10.4h of sunshine.
October is the least humid month, with an average relative humidity of 72%.
The month with the shortest days is December, with an average of 9h and 18min of daylight.
Average temperature
Decatur City, IA
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (30.6°F).
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).
Average pressure
Decatur City, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.92"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.89"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed
Decatur City, IA
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.6mph - Average wind speed in June:
8mph
- Average wind speed in July:
6.9mph - Average wind speed in August:
6.9mph - Average wind speed in September:
7.9mph - Average wind speed in October:
9.3mph - Average wind speed in November:
10.2mph - Average wind speed in December:
9.9mph
The windiest months (with the highest average wind speed) are January, February and March (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).
Average humidity
Decatur City, IA
The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Decatur City, IA
- Average rainfall in January:
0.67" - Average rainfall in February:
0.71" - Average rainfall in March:
1.5" - Average rainfall in April:
1.81" - Average rainfall in May:
2.8" - Average rainfall in June:
3.43"
- Average rainfall in July:
1.89" - Average rainfall in August:
1.93" - Average rainfall in September:
2.24" - Average rainfall in October:
1.54" - Average rainfall in November:
1.06" - Average rainfall in December:
0.67"
The wettest month (with the highest rainfall) is June (3.43").
The driest months (with the least rainfall) are January and December (0.67").
Average rainfall days
Decatur City, IA
- Average rainfall days in January:
4.8 days - Average rainfall days in February:
5 days - Average rainfall days in March:
11.6 days - Average rainfall days in April:
14.1 days - Average rainfall days in May:
17.2 days - Average rainfall days in June:
17.3 days
- Average rainfall days in July:
15.1 days - Average rainfall days in August:
13.3 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
9.9 days - Average rainfall days in November:
6.9 days - Average rainfall days in December:
5.7 days
The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is January (4.8 days).
Average snowfall
Decatur City, IA
The month with the highest snowfall is January (2.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Decatur City, IA
- Average snowfall days in January:
8.6 days - Average snowfall days in February:
8.2 days - Average snowfall days in March:
3.7 days - Average snowfall days in April:
1.3 days - Average snowfall days in May:
0.2 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:
1.8 days - Average snowfall days in December:
5.9 days
The month with the highest number of snowfall days is January (8.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Decatur City, IA
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 18min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
4h and 24min - Average sunshine in February:
5h and 6min - Average sunshine in March:
6h and 6min - Average sunshine in April:
8h and 12min - Average sunshine in May:
8h and 36min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
10h and 24min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 24min - Average sunshine in October:
5h and 42min - Average sunshine in November:
5h and 42min - Average sunshine in December:
4h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days
Decatur City, IA
- Average sunshine days in January:
19.1 days - Average sunshine days in February:
15.9 days - Average sunshine days in March:
15 days - Average sunshine days in April:
13.6 days - Average sunshine days in May:
10.8 days - Average sunshine days in June:
8.9 days
- Average sunshine days in July:
11.6 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
16 days - Average sunshine days in October:
18.6 days - Average sunshine days in November:
20.1 days - Average sunshine days in December:
20.3 days
The month with the most sunshine days is December (20.3 days).
The month with the least sunshine days is June (8.9 days).
Average UV index
Decatur City, IA
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Decatur City, IA
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility
Decatur City, 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).
