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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 Henderson, Iowa, is another subzero cold winter month, with an average temperature fluctuating between 30°F (-1.1°C) and 16.7°F (-8.5°C). During the coldest month, January, temperatures average a high of 30°F (-1.1°C) and a low of 16.7°F (-8.5°C). Weather in January »
Weather in February
February, the last month of the winter in Henderson, is a cold month, with an average temperature varying between 34.3°F (1.3°C) and 19.6°F (-6.9°C). The shift into February finds Henderson, Iowa, at an average high-temperature of an icy 34.3°F (1.3°C), closely comparable to January's conditions. Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Henderson, Iowa, with an average temperature ranging between min 33.3°F (0.7°C) and max 49.5°F (9.7°C). Henderson's March weather is characterized by a distinct upsurge in high-temperatures, soaring from February's icy 34.3°F (1.3°C) to a frosty 49.5°F (9.7°C). Weather in March »
Weather in April
April is a refreshing spring month in Henderson, Iowa, with an average temperature fluctuating between 61.3°F (16.3°C) and 42.8°F (6°C). With the onset of April, Henderson sees a temperature rise, with the average high-temperature moving from March's chilly 49.5°F (9.7°C) to a comfortable 61.3°F (16.3°C). Weather in April »
Weather in May
May, the last month of the spring in Henderson, is a pleasant month, with an average temperature fluctuating between 54°F (12.2°C) and 70.7°F (21.5°C). May sees a rise in the average high-temperature, climbing from a refreshing 61.3°F (16.3°C) in April to an agreeable 70.7°F (21.5°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Henderson, Iowa, with temperature in the range of an average high of 81°F (27.2°C) and an average low of 64°F (17.8°C). The arrival of June brings a change in Henderson's weather, with average high-temperatures moving from May's pleasant 70.7°F (21.5°C) to a warm 81°F (27.2°C). Weather in June »
Weather in July
July, like June, in Henderson, Iowa, is a moderately hot summer month, with an average temperature ranging between min 65.8°F (18.8°C) and max 83.7°F (28.7°C). Henderson experiences its highest average temperatures in July, reaching a peak of 83.7°F (28.7°C) and a minimum of 65.8°F (18.8°C). The heat index value during July is calculated to be a hot 93.2°F (34°C). Weather in July »
Weather in August
August, the last month of the summer in Henderson, is another warm month, with an average temperature ranging between max 81.9°F (27.7°C) and min 63.1°F (17.3°C). As August takes hold, the average high-temperature is a still warm 81.9°F (27.7°C), nearly mirroring that of the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Henderson, Iowa, with an average temperature fluctuating between 76.6°F (24.8°C) and 56.5°F (13.6°C). With the onset of September, the average high-temperature registers at a still moderately hot 76.6°F (24.8°C), subtly different from August's 81.9°F (27.7°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Henderson, Iowa, with temperature in the range of an average low of 45°F (7.2°C) and an average high of 61.5°F (16.4°C). October signals a clear decrease in the average high-temperature, dropping from September's warm 76.6°F (24.8°C) to an enjoyable 61.5°F (16.4°C). Weather in October »
Weather in November
November, the last month of the autumn in Henderson, is also a frosty month, with temperature in the range of an average high of 48.6°F (9.2°C) and an average low of 33.3°F (0.7°C). The commencement of November involves a temperature shift, with the average high-temperature dropping from a refreshing 61.5°F (16.4°C) in October to a chilly 48.6°F (9.2°C). Weather in November »
Weather in December
December, the first month of the winter in Henderson, is also an icy month, with an average temperature ranging between min 22.1°F (-5.5°C) and max 34.7°F (1.5°C). The onset of December brings a small change in high-temperatures, falling from a frosty 48.6°F (9.2°C) in November to a cold 34.7°F (1.5°C). Weather in December »
Updated: Jul 30, 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?
Henderson reaches its average lowest temperatures in January, measuring 30°F (-1.1°C) at the peak and 16.7°F (-8.5°C) at the lowest.
What is the most humid month?
January is the most humid month, with an average relative humidity of 81%.
What is the driest month?
The months with the least rainfall are January and February Rain falls for 3.6 days and accumulates 0.63" (16mm) of rain.
How much does it rain?
In Henderson, during the entire year, the rain falls for 117.2 days and collects up to 21.77" (553mm) of precipitation.
When does it snow?
Months with snowfall are January through April, October through December.
What is the snowiest month in Henderson?
January is the month with the most snowfall. Snow falls for 7.9 days and accumulates 2.68" (68mm) of snow.
How many days does it snow in Henderson?
Throughout the year, there are 26.7 snowfall days, and 9.76" (248mm) of snow is accumulated.
What is the month with the least sunshine?
With an average of 4.6h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index?
January, February, October through December, with an average maximum UV index of 2, are months 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.
When it does not snow?
In Henderson, snow does not fall in May through September.
What is the wettest month?
The month with the most rainfall is June, when the rain falls for 14.9 days and typically aggregates up to 4.06" (103mm) of precipitation.
When are the longest days?
June has the longest days of the year in Henderson, with an average of 15h and 6min of daylight.
When is the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What month is the hottest?
July, on average, is the warmest month, registering a high temperature of 83.7°F (28.7°C) and a low of 65.8°F (18.8°C).
What month has the most sunshine?
July has the most sunshine of the year, with an average of 10.3h of sunshine.
What is the least humid month?
With an average relative humidity of 68%, October is the least humid month.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 18min of daylight.
Average temperature
Henderson, IA
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (30°F).
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure
Henderson, 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:
29.92"Hg - Average pressure in June:
29.87"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.95"Hg - Average pressure in September:
30"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"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
Henderson, IA
- Average wind speed in January:
10mph - Average wind speed in February:
10.1mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.4mph - Average wind speed in May:
8.8mph - Average wind speed in June:
8.2mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
7mph - Average wind speed in September:
8.1mph - Average wind speed in October:
9.3mph - Average wind speed in November:
9.9mph - Average wind speed in December:
9.6mph
The windiest months (with the highest average wind speed) are March and April (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity
Henderson, IA
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is October (68%).
Average rainfall
Henderson, IA
- Average rainfall in January:
0.63" - Average rainfall in February:
0.63" - Average rainfall in March:
1.18" - Average rainfall in April:
1.73" - Average rainfall in May:
3.5" - Average rainfall in June:
4.06"
- Average rainfall in July:
2.32" - Average rainfall in August:
2.56" - Average rainfall in September:
1.77" - Average rainfall in October:
1.57" - Average rainfall in November:
0.83" - Average rainfall in December:
0.98"
The wettest month (with the highest rainfall) is June (4.06").
The driest months (with the least rainfall) are January and February (0.63").
Average rainfall days
Henderson, IA
- Average rainfall days in January:
3.6 days - Average rainfall days in February:
2.9 days - Average rainfall days in March:
9.8 days - Average rainfall days in April:
12.8 days - Average rainfall days in May:
16.8 days - Average rainfall days in June:
14.9 days
- Average rainfall days in July:
13.7 days - Average rainfall days in August:
13 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
8.7 days - Average rainfall days in November:
5.3 days - Average rainfall days in December:
4.2 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (2.9 days).
Average snowfall
Henderson, IA
The month with the highest snowfall is January (2.68").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Henderson, IA
- Average snowfall days in January:
7.9 days - Average snowfall days in February:
7.3 days - Average snowfall days in March:
3.8 days - Average snowfall days in April:
0.8 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:
0.7 days - Average snowfall days in November:
1.4 days - Average snowfall days in December:
4.8 days
The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Henderson, 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 3min - 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 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
5h and 2min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 1min - Average sunshine in October:
6h and 0min - Average sunshine in November:
5h and 5min - Average sunshine in December:
4h and 5min
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 36min).
Average sunshine days
Henderson, IA
- Average sunshine days in January:
20.4 days - Average sunshine days in February:
18.8 days - Average sunshine days in March:
17.4 days - Average sunshine days in April:
14.9 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
12.7 days
- Average sunshine days in July:
14.3 days - Average sunshine days in August:
15.4 days - Average sunshine days in September:
16.9 days - Average sunshine days in October:
20 days - Average sunshine days in November:
22.5 days - Average sunshine days in December:
23.1 days
The month with the most sunshine days is December (23.1 days).
The month with the least sunshine days is May (12.3 days).
Average UV index
Henderson, IA
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover
Henderson, IA
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility
Henderson, 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).
Henderson, Iowa, USA
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