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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 Walnut, Iowa, is a freezing cold winter month, with an average temperature varying between 28.8°F (-1.8°C) and 15.4°F (-9.2°C). With average high and low temperatures of 28.8°F (-1.8°C) and 15.4°F (-9.2°C) respectively, January is Walnut's coldest month. Weather in January »
Weather in February
The last month of the winter, February, is an icy month in Walnut, Iowa, with an average temperature varying between 32.4°F (0.2°C) and 18.5°F (-7.5°C). The start of February sees the average high-temperature at a cold 32.4°F (0.2°C), showing little difference from January's 28.8°F (-1.8°C). Weather in February »
Weather in March
March, the first month of the spring in Walnut, is a chilly month, with an average temperature ranging between min 32.5°F (0.3°C) and max 48.2°F (9°C). In Walnut, stepping into March signifies a significant temperature increment, moving up from February's cold 32.4°F (0.2°C) to a frosty 48.2°F (9°C). Weather in March »
Weather in April
April is a moderate spring month in Walnut, Iowa, with temperature in the range of an average high of 59.9°F (15.5°C) and an average low of 42.4°F (5.8°C). April's arrival sees a rise in the average high-temperature, jumping from March's chilly 48.2°F (9°C) to a moderate 59.9°F (15.5°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Walnut, Iowa, with an average temperature varying between 70.3°F (21.3°C) and 53.4°F (11.9°C). The beginning of May signals a rise in the average high-temperature, moving from a moderate 59.9°F (15.5°C) in April to a pleasant 70.3°F (21.3°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Walnut, Iowa, with an average temperature ranging between max 80.1°F (26.7°C) and min 63.3°F (17.4°C). The arrival of June brings an increase in high-temperatures, moving from a pleasant 70.3°F (21.3°C) in May to a warm 80.1°F (26.7°C). Weather in June »
Weather in July
July, like June, in Walnut, Iowa, is another warm summer month, with an average temperature varying between 65.1°F (18.4°C) and 82.9°F (28.3°C). In Walnut, the month of July is known for its highest average temperatures, reaching a high of 82.9°F (28.3°C) and a low of 65.1°F (18.4°C). July's average heat index is appraised at a tropical 91.4°F (33°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Walnut, Iowa, with an average temperature ranging between max 81.1°F (27.3°C) and min 62.2°F (16.8°C). In August, the average high-temperature registers at a still moderately hot 81.1°F (27.3°C), nearly identical to July's 82.9°F (28.3°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Walnut, Iowa, with an average temperature fluctuating between 75.6°F (24.2°C) and 55.9°F (13.3°C). The shift from August to September includes a small decrease in the average high-temperature, from 81.1°F (27.3°C) to a still moderately hot 75.6°F (24.2°C). Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Walnut, Iowa, with an average temperature fluctuating between 44.8°F (7.1°C) and 61°F (16.1°C). As October begins, there is a noticeable decrease in the average high-temperature, falling from a warm 75.6°F (24.2°C) in September to an enjoyable 61°F (16.1°C). Weather in October »
Weather in November
November, the last month of the autumn in Walnut, is also a frosty month, with an average temperature fluctuating between 32.9°F (0.5°C) and 47.3°F (8.5°C). November's onset brings a slight change in high-temperatures, falling from a comfortable 61°F (16.1°C) in October to a chilly 47.3°F (8.5°C). Weather in November »
Weather in December
December, the first month of the winter in Walnut, is also a wintry month, with an average temperature fluctuating between 33.4°F (0.8°C) and 21.4°F (-5.9°C). December brings a minor decrease, with the average high-temperature reducing from a chilly 47.3°F (8.5°C) in November to a wintry 33.4°F (0.8°C). Weather in December »
Updated: Aug 3, 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?
The coldest temperatures occur during January, when averages reach a peak of 28.8°F (-1.8°C) and a low of 15.4°F (-9.2°C).
What is the most humid month?
With an average relative humidity of 82%, January is the most humid month.
What is the driest month?
January is the month with the least rainfall. Rain falls for 5.1 days and accumulates 0.87" (22mm) of precipitation.
How much does it rain?
Throughout the year, there are 127.7 rainfall days, and 26.57" (675mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through May, October through December.
How many days does it snow?
Throughout the year, there are 35.8 snowfall days, and 13.82" (351mm) 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 in Walnut.
What are the months 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.
What is the snowiest month?
February is the month with the most snowfall. Snow falls for 8.3 days and accumulates 3.7" (94mm) of snow.
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 rainiest month?
June is the month with the most rainfall. Rain falls for 16.9 days and accumulates 4.37" (111mm) of precipitation.
When it does not snow?
In Walnut, 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 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 are the warmest months?
July, characterized by an average high temperature of 82.9°F (28.3°C) and a low temperature of 65.1°F (18.4°C), is generally the warmest month.
What month has the most sunshine?
July has the most sunshine of the year in Walnut, with an average of 10.4h 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?
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
Walnut, IA
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (28.8°F).
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure
Walnut, 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:
29.96"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
Walnut, IA
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.6mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9.1mph - Average wind speed in June:
8.4mph
- Average wind speed in July:
7mph - Average wind speed in August:
7.3mph - Average wind speed in September:
8.4mph - Average wind speed in October:
9.5mph - Average wind speed in November:
10.3mph - Average wind speed in December:
9.9mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity
Walnut, IA
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (68%).
Average rainfall
Walnut, IA
- Average rainfall in January:
0.87" - Average rainfall in February:
0.98" - Average rainfall in March:
1.73" - Average rainfall in April:
2.4" - Average rainfall in May:
4.06" - Average rainfall in June:
4.37"
The wettest month (with the highest rainfall) is June (4.37").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days
Walnut, IA
- Average rainfall days in January:
5.1 days - Average rainfall days in February:
3.6 days - Average rainfall days in March:
10.2 days - Average rainfall days in April:
14.2 days - Average rainfall days in May:
17.1 days - Average rainfall days in June:
16.9 days
- Average rainfall days in July:
13.5 days - Average rainfall days in August:
13.7 days - Average rainfall days in September:
11.8 days - Average rainfall days in October:
10 days - Average rainfall days in November:
6.4 days - Average rainfall days in December:
5.2 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is February (3.6 days).
Average snowfall
Walnut, IA
- Average snowfall in January:
3.62" - Average snowfall in February:
3.7" - Average snowfall in March:
1.93" - Average snowfall in April:
0.91" - Average snowfall in May:
0.16" - Average snowfall in June:
0"
The month with the highest snowfall is February (3.7").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Walnut, IA
- Average snowfall days in January:
9.8 days - Average snowfall days in February:
8.3 days - Average snowfall days in March:
4.5 days - Average snowfall days in April:
1.3 days - Average snowfall days in May:
0.3 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:
2.5 days - Average snowfall days in December:
8.5 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Walnut, 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 1min
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 12min).
- 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 5min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
9h and 4min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 5min - 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 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days
Walnut, IA
- Average sunshine days in January:
17.8 days - Average sunshine days in February:
15.7 days - Average sunshine days in March:
16.4 days - Average sunshine days in April:
13.3 days - Average sunshine days in May:
11.7 days - Average sunshine days in June:
11 days
- Average sunshine days in July:
13.9 days - Average sunshine days in August:
14.8 days - Average sunshine days in September:
16.3 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
20.5 days - Average sunshine days in December:
18.7 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is June (11 days).
Average UV index
Walnut, 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
Walnut, IA
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility
Walnut, 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).
Walnut, Iowa, USA
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