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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 Defiance, Iowa, is another subzero cold winter month, with an average temperature fluctuating between 27°F (-2.8°C) and 14°F (-10°C). Defiance's January weather, with an average high temperature of 27°F (-2.8°C) and an average low temperature of 14°F (-10°C), tends to be the coldest of the year. Weather in January »
Weather in February
February, the last month of the winter in Defiance, is another freezing cold month, with an average temperature varying between 17.6°F (-8°C) and 30.7°F (-0.7°C). February brings an average high-temperature of a still freezing cold 30.7°F (-0.7°C), nearly identical to the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Defiance, Iowa, with an average temperature ranging between min 31.1°F (-0.5°C) and max 46.4°F (8°C). March is marked by a significant increase, with the average high-temperature advancing from a subzero cold 30.7°F (-0.7°C) in February to a frosty 46.4°F (8°C). Weather in March »
Weather in April
April in Defiance, Iowa, is a mild spring month, with an average temperature fluctuating between 41.7°F (5.4°C) and 58.5°F (14.7°C). As March transitions into April, a change in temperatures is observed, with average highs moving from a frosty 46.4°F (8°C) to a moderate 58.5°F (14.7°C). Weather in April »
Weather in May
May, the last month of the spring in Defiance, is a pleasant month, with an average temperature fluctuating between 69.4°F (20.8°C) and 52.7°F (11.5°C). The rise of average high-temperatures is seen in May, with an increase from a mild 58.5°F (14.7°C) in April to a pleasant 69.4°F (20.8°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Defiance, Iowa, with an average temperature varying between 62.8°F (17.1°C) and 79.3°F (26.3°C). The start of June signals an increase in the average high-temperature, moving from an agreeable 69.4°F (20.8°C) in May to a warm 79.3°F (26.3°C). Weather in June »
Weather in July
July, like June, in Defiance, Iowa, is a moderately hot summer month, with an average temperature varying between 64.8°F (18.2°C) and 81.7°F (27.6°C). The month of July sees the highest average temperatures, reaching 81.7°F (27.6°C) at the peak and 64.8°F (18.2°C) at the low. The heat index value for July is appraised at a hot 87.8°F (31°C). Weather in July »
Weather in August
August, the last month of the summer in Defiance, is also a moderately hot month, with temperature in the range of an average low of 61.7°F (16.5°C) and an average high of 79.7°F (26.5°C). August experiences an average high-temperature of a still moderately hot 79.7°F (26.5°C), barely different from July's 81.7°F (27.6°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Defiance, Iowa, with temperature in the range of an average high of 74.5°F (23.6°C) and an average low of 55.6°F (13.1°C). The arrival of September is marked by an average high-temperature of a still warm 74.5°F (23.6°C), bearing a close resemblance to August. Weather in September »
Weather in October
October, like September, is another mild autumn month in Defiance, Iowa, with temperature in the range of an average high of 59.2°F (15.1°C) and an average low of 43.7°F (6.5°C). The shift into October is marked by a noticeable reduction in the average high-temperature, decreasing from September's warm 74.5°F (23.6°C) to a moderate 59.2°F (15.1°C). Weather in October »
Weather in November
November, the last month of the autumn in Defiance, is also a frosty month, with an average temperature varying between 45.9°F (7.7°C) and 32°F (0°C). The onset of November introduces a moderate change in Defiance's weather, with average high-temperatures falling from October's refreshing 59.2°F (15.1°C) to a chilly 45.9°F (7.7°C). Weather in November »
Weather in December
The first month of the winter, December, is still a freezing cold month in Defiance, Iowa, with an average temperature ranging between min 20.3°F (-6.5°C) and max 31.8°F (-0.1°C). Stepping into December, Defiance observes a temperature decline, with the average high falling from November's frosty 45.9°F (7.7°C) to a subzero cold 31.8°F (-0.1°C). Weather in December »
Updated: Aug 28, 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 is the coldest month?
Defiance records the coldest temperatures in January, averaging a high of 27°F (-2.8°C) and a low of 14°F (-10°C).
What is the most humid month in Defiance?
The most humid month is January, with an average relative humidity of 83%.
What is the driest month?
January is the month with the least rainfall. Rain falls for 3.6 days and accumulates 0.71" (18mm) of precipitation.
How many days does it rain?
Throughout the year, there are 123 rainfall days, and 24.72" (628mm) of precipitation is accumulated.
When does it snow in Defiance?
Months with snowfall are January through May, October through December.
How many days does it snow?
Throughout the year, there are 36.8 snowfall days, and 14.53" (369mm) of snow is accumulated.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 4.2h of sunshine.
When does it snow the most?
The month with the most snowfall in Defiance is February, when snow falls for 8.3 days and typically aggregates up to 3.43" (87mm) of snow.
What is the month with the lowest UV index?
With an average maximum UV index of 1, February is the month with the lowest UV index.
When is Daylight Saving Time (DST)?
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.
What is the least humid month?
The months with the lowest humidity are April and October, with an average relative humidity of 68%.
What is the rainiest month?
The month with the most rainfall in Defiance is May, when the rain falls for 16 days and typically aggregates up to 3.82" (97mm) of precipitation.
When it does not snow?
In Defiance, snow does not fall in June through September.
When are the longest days?
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?
June and July, with an average maximum UV index of 6, are months with the highest UV index.
What is the hottest time of year?
July is the month that records the highest temperatures, with averages ranging from a high of 81.7°F (27.6°C) to a low of 64.8°F (18.2°C).
What month has the most sunshine?
With an average of 10.3h of sunshine, July has the most sunshine of the year in Defiance.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 12min of daylight.
Average temperature
Defiance, 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 (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°F).
Average pressure
Defiance, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.15"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:
29.87"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed
Defiance, IA
- Average wind speed in January:
10.9mph - Average wind speed in February:
10.8mph - Average wind speed in March:
10.9mph - Average wind speed in April:
11.1mph - Average wind speed in May:
9.4mph - Average wind speed in June:
8.8mph
- Average wind speed in July:
7.4mph - Average wind speed in August:
7.6mph - Average wind speed in September:
8.7mph - Average wind speed in October:
9.9mph - Average wind speed in November:
10.6mph - Average wind speed in December:
10.4mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).
Average humidity
Defiance, IA
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are April and October (68%).
Average rainfall
Defiance, IA
- Average rainfall in January:
0.71" - Average rainfall in February:
0.91" - Average rainfall in March:
1.61" - Average rainfall in April:
2.36" - Average rainfall in May:
3.82" - Average rainfall in June:
3.5"
The wettest month (with the highest rainfall) is May (3.82").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days
Defiance, IA
- Average rainfall days in January:
3.6 days - Average rainfall days in February:
3 days - Average rainfall days in March:
9.4 days - Average rainfall days in April:
13.7 days - Average rainfall days in May:
16 days - Average rainfall days in June:
16.5 days
- Average rainfall days in July:
14 days - Average rainfall days in August:
13.7 days - Average rainfall days in September:
11.8 days - Average rainfall days in October:
10.4 days - Average rainfall days in November:
6.4 days - Average rainfall days in December:
4.5 days
The month with the highest number of rainy days is June (16.5 days).
The month with the least rainy days is February (3 days).
Average snowfall
Defiance, IA
- Average snowfall in January:
3.35" - Average snowfall in February:
3.43" - Average snowfall in March:
2.68" - Average snowfall in April:
0.94" - Average snowfall in May:
0.12" - Average snowfall in June:
0"
The month with the highest snowfall is February (3.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Defiance, IA
- Average snowfall days in January:
10.2 days - Average snowfall days in February:
8.3 days - Average snowfall days in March:
5.1 days - Average snowfall days in April:
1.4 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:
0.8 days - Average snowfall days in November:
2.9 days - Average snowfall days in December:
8 days
The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Defiance, 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:
5h and 0min - Average sunshine in March:
6h and 0min - 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:
10h and 2min - Average sunshine in August:
9h and 3min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days
Defiance, IA
- Average sunshine days in January:
18 days - Average sunshine days in February:
16.9 days - Average sunshine days in March:
16.4 days - Average sunshine days in April:
13.3 days - Average sunshine days in May:
13.2 days - Average sunshine days in June:
11.9 days
- Average sunshine days in July:
14.8 days - Average sunshine days in August:
15 days - Average sunshine days in September:
16.1 days - Average sunshine days in October:
18.8 days - Average sunshine days in November:
20.4 days - Average sunshine days in December:
19.7 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is June (11.9 days).
Average UV index
Defiance, IA
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover
Defiance, IA
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility
Defiance, IA
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Defiance, Iowa, USA
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