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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, like December, is a freezing cold winter month in Union, Iowa, with temperature in the range of an average high of 24.4°F (-4.2°C) and an average low of 12.2°F (-11°C). In Union, Iowa, the lowest temperatures are generally noted in January, averaging a high of 24.4°F (-4.2°C) and a low of 12.2°F (-11°C). Weather in January »
Weather in February
The last month of the winter, February, is another freezing cold month in Union, Iowa, with an average temperature varying between 28.9°F (-1.7°C) and 15.8°F (-9°C). February experiences an average high-temperature of a still freezing cold 28.9°F (-1.7°C), barely different from January's 24.4°F (-4.2°C). Weather in February »
Weather in March
March, the first month of the spring in Union, is a chilly month, with an average temperature varying between 29.7°F (-1.3°C) and 44.1°F (6.7°C). As Union transitions into March, the average high-temperature shows a marked escalation, increasing from a subzero cold 28.9°F (-1.7°C) in February to a frosty 44.1°F (6.7°C). Weather in March »
Weather in April
April is a refreshing spring month in Union, Iowa, with an average temperature varying between 40.8°F (4.9°C) and 56.8°F (13.8°C). In Union, the onset of April comes with an increased average high-temperature, moving from March's chilly 44.1°F (6.7°C) to a refreshing 56.8°F (13.8°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Union, Iowa, with temperature in the range of an average high of 68.4°F (20.2°C) and an average low of 52.2°F (11.2°C). May indicates a change in the average high-temperature, moving up from a moderate 56.8°F (13.8°C) in April to an agreeable 68.4°F (20.2°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Union, Iowa, with an average temperature fluctuating between 61.7°F (16.5°C) and 77.5°F (25.3°C). June's arrival signals an increase in average high-temperatures, moving from May's pleasant 68.4°F (20.2°C) to a moderately hot 77.5°F (25.3°C). Weather in June »
Weather in July
July, like June, in Union, Iowa, is another warm summer month, with temperature in the range of an average low of 63.9°F (17.7°C) and an average high of 79.9°F (26.6°C). July, with average temperatures reaching a high of 79.9°F (26.6°C) and a low of 63.9°F (17.7°C), is the warmest month. Weather in July »
Weather in August
August, the last month of the summer in Union, is another warm month, with an average temperature ranging between min 60.8°F (16°C) and max 78.4°F (25.8°C). Union's weather, upon August's arrival, documents an average high-temperature of a still warm 78.4°F (25.8°C), nearly identical to the prior month. Weather in August »
Weather in September
September, the first month of the autumn in Union, is still a warm month, with an average temperature varying between 73.8°F (23.2°C) and 54.5°F (12.5°C). The shift from August to September is characterized by an average high-temperature of a still moderately hot 73.8°F (23.2°C), not significantly different from the 78.4°F (25.8°C) of August. Weather in September »
Weather in October
October, the same as September, in Union, Iowa, is another refreshing autumn month, with an average temperature fluctuating between 58.5°F (14.7°C) and 43.7°F (6.5°C). October's arrival signals a significant decrease in average high-temperatures, falling from September's moderately hot 73.8°F (23.2°C) to a refreshing 58.5°F (14.7°C). Weather in October »
Weather in November
November, the last month of the autumn in Union, is another chilly month, with an average temperature fluctuating between 31.3°F (-0.4°C) and 44.4°F (6.9°C). In Union, entering November brings a temperature decrement, reducing from October's mild 58.5°F (14.7°C) to a chilly 44.4°F (6.9°C). Weather in November »
Weather in December
December, the first month of the winter in Union, is also a subzero cold month, with an average temperature varying between 20.1°F (-6.6°C) and 30.9°F (-0.6°C). In Union, the beginning of December is marked by a lowered average high-temperature, shifting from November's frosty 44.4°F (6.9°C) to a subzero cold 30.9°F (-0.6°C). Weather in December »
[Resources]Frequently asked questions
What are the coldest months in Union?
With average high and low temperatures of 24.4°F (-4.2°C) and 12.2°F (-11°C) respectively, January is Union's coldest month.
What is the most humid month in Union?
January is the most humid month in Union, with an average relative humidity of 87%.
What is the driest month in Union?
The months with the least rainfall in Union, Iowa, are January and February Rain falls for 2 days and accumulates 0.24" (6mm) of rain.
How many days does it rain in Union?
Throughout the year, there are 83.5 rainfall days, and 6.5" (165mm) of precipitation is accumulated.
When does it snow in Union?
Months with snowfall in Union are January through April, October through December.
How many days does it snow in Union?
In Union, Iowa, during the entire year, snow falls for 26.6 days and aggregates up to 3.03" (77mm) of snow.
What is the month with the least sunshine in Union?
With an average of 3.9h of sunshine, January has the least sunshine of the year in Union.
What is the month with the lowest UV index in Union?
January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index.
When does it snow the most in Union?
February is the month with the most snowfall in Union, Iowa. Snow falls for 6.3 days and accumulates 0.79" (20mm) of snow.
When is Daylight Saving Time (DST) in Union?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Union, 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 Union?
May is the month with the most rainfall in Union, Iowa. Rain falls for 11.6 days and accumulates 1.06" (27mm) of precipitation.
When it does not snow in Union?
In Union, Iowa, snow does not fall in May through September.
When are the longest days in Union?
The month with the longest days is June, with an average of 15h and 12min of daylight.
What is the month with the highest UV index in Union?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What are the warmest months in Union?
July, marked by an average high-temperature of 79.9°F (26.6°C) and a low-temperature of 63.9°F (17.7°C), is the warmest month.
What month has the most sunshine in Union?
The month with the most sunshine in Union, Iowa, is July, with an average of 10h of sunshine.
What is the least humid month in Union?
October is the least humid month in Union, with an average relative humidity of 71%.
What is the month with the shortest days in Union?
December has the shortest days of the year in Union, with an average of 9h and 12min of daylight.
Average temperature
Union, IA
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (24.4°F).
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).
Average pressure
Union, IA
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.93"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:
29.97"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:
30.11"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed
Union, IA
- Average wind speed in January:
10.8mph - Average wind speed in February:
10.7mph - Average wind speed in March:
10.6mph - Average wind speed in April:
10.9mph - Average wind speed in May:
9.3mph - Average wind speed in June:
8.3mph
- Average wind speed in July:
7.1mph - Average wind speed in August:
7.1mph - Average wind speed in September:
8.4mph - Average wind speed in October:
9.9mph - Average wind speed in November:
10.6mph - Average wind speed in December:
10.3mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity
Union, IA
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Union, IA
- Average rainfall in January:
0.24" - Average rainfall in February:
0.24" - Average rainfall in March:
0.35" - Average rainfall in April:
0.67" - Average rainfall in May:
1.06" - Average rainfall in June:
0.91"
- Average rainfall in July:
0.75" - Average rainfall in August:
0.51" - Average rainfall in September:
0.51" - Average rainfall in October:
0.63" - Average rainfall in November:
0.35" - Average rainfall in December:
0.28"
The wettest month (with the highest rainfall) is May (1.06").
The driest months (with the least rainfall) are January and February (0.24").
Average rainfall days
Union, IA
- Average rainfall days in January:
2 days - Average rainfall days in February:
2 days - Average rainfall days in March:
7.8 days - Average rainfall days in April:
9.5 days - Average rainfall days in May:
11.6 days - Average rainfall days in June:
10.4 days
- Average rainfall days in July:
11.3 days - Average rainfall days in August:
8.3 days - Average rainfall days in September:
8.1 days - Average rainfall days in October:
5.5 days - Average rainfall days in November:
4 days - Average rainfall days in December:
3 days
The month with the highest number of rainy days is May (11.6 days).
The months with the least rainy days are January and February (2 days).
Average snowfall
Union, IA
The month with the highest snowfall is February (0.79").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Union, IA
- Average snowfall days in January:
7 days - Average snowfall days in February:
6.3 days - Average snowfall days in March:
3.8 days - Average snowfall days in April:
0.8 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:
1 days - Average snowfall days in November:
2.6 days - Average snowfall days in December:
4.9 days
The month with the highest number of snowfall days is January (7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Union, 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 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:
3h and 5min - Average sunshine in February:
4h and 2min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days
Union, IA
- Average sunshine days in January:
25.2 days - Average sunshine days in February:
21.5 days - Average sunshine days in March:
21.1 days - Average sunshine days in April:
17.8 days - Average sunshine days in May:
16.3 days - Average sunshine days in June:
15.8 days
- Average sunshine days in July:
16.4 days - Average sunshine days in August:
19.6 days - Average sunshine days in September:
20.3 days - Average sunshine days in October:
23.5 days - Average sunshine days in November:
23 days - Average sunshine days in December:
24.6 days
The month with the most sunshine days is January (25.2 days).
The month with the least sunshine days is June (15.8 days).
Average UV index
Union, IA
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover
Union, IA
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility
Union, IA
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Union, Iowa, USA
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