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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 Harper, Iowa, is a freezing cold winter month, with an average temperature varying between 28.6°F (-1.9°C) and 15.6°F (-9.1°C). In Harper, Iowa, the lowest temperatures are generally noted in January, averaging a high of 28.6°F (-1.9°C) and a low of 15.6°F (-9.1°C). Weather in January »
Weather in February
February, the last month of the winter in Harper, is an icy month, with temperature in the range of an average low of 19°F (-7.2°C) and an average high of 32.5°F (0.3°C). Harper experiences a subtle adjustment in high-temperatures to an icy 32.5°F (0.3°C) with the onset of February, maintaining near parity with January's 28.6°F (-1.9°C). Weather in February »
Weather in March
March, the first month of the spring in Harper, is a frosty month, with temperature in the range of an average high of 47.1°F (8.4°C) and an average low of 32.4°F (0.2°C). As Harper, Iowa, transitions into March, the average high-temperature shows a marked escalation, increasing from a cold 32.5°F (0.3°C) in February to a frosty 47.1°F (8.4°C). Weather in March »
Weather in April
April in Harper, Iowa, is a refreshing spring month, with an average temperature ranging between max 59.5°F (15.3°C) and min 42.4°F (5.8°C). Harper's weather in April presents a rise in the average high-temperature, moving from a frosty 47.1°F (8.4°C) in March to a mild 59.5°F (15.3°C). Weather in April »
Weather in May
May, the last month of the spring in Harper, is an agreeable month, with an average temperature ranging between max 70°F (21.1°C) and min 53.2°F (11.8°C). The transition to May introduces an increase in the average high-temperature, shifting from a refreshing 59.5°F (15.3°C) in April to a pleasant 70°F (21.1°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Harper, Iowa, with an average temperature ranging between max 79.3°F (26.3°C) and min 63.1°F (17.3°C). With the onset of June, Harper's weather sees a temperature rise, transitioning from a pleasant 70°F (21.1°C) in May to a warm 79.3°F (26.3°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Harper, Iowa, with an average temperature fluctuating between 65.1°F (18.4°C) and 82°F (27.8°C). With average temperatures fluctuating between a high of 82°F (27.8°C) and a low of 65.1°F (18.4°C), July stands out as the warmest month. In July, the heat index is evaluated at a tropical 89.6°F (32°C). Weather in July »
Weather in August
August, the last month of the summer in Harper, is also a moderately hot month, with an average temperature fluctuating between 62.8°F (17.1°C) and 81.1°F (27.3°C). With the advent of August, Harper experiences an average high-temperature of a still moderately hot 81.1°F (27.3°C), mirroring a close resemblance to the previous month. Weather in August »
Weather in September
September, the first month of the autumn in Harper, is still a warm month, with an average temperature ranging between min 56.3°F (13.5°C) and max 75.2°F (24°C). In Harper, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's moderately hot 81.1°F (27.3°C) to a still warm 75.2°F (24°C). Weather in September »
Weather in October
October, like September, in Harper, Iowa, is another comfortable autumn month, with an average temperature fluctuating between 61.3°F (16.3°C) and 44.8°F (7.1°C). Stepping into October, Harper observes a temperature decline, with the average high falling from September's warm 75.2°F (24°C) to an enjoyable 61.3°F (16.3°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Harper, Iowa, with an average temperature fluctuating between 33.4°F (0.8°C) and 46.9°F (8.3°C). November marks a distinct drop in the average high-temperature, descending from October's comfortable 61.3°F (16.3°C) to a chilly 46.9°F (8.3°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Harper, Iowa, with an average temperature ranging between min 23.4°F (-4.8°C) and max 34.7°F (1.5°C). A shift in Harper's weather is observed as November turns into December, with the average high temperature reducing from a frosty 46.9°F (8.3°C) to an icy 34.7°F (1.5°C). Weather in December »
[Resources]Frequently asked questions
What part of the year is the coldest in Harper?
January proves to be the coldest month in Harper, recording an average maximum temperature of 28.6°F (-1.9°C) and a minimum temperature of 15.6°F (-9.1°C).
How much does it rain in Harper?
Throughout the year, in Harper, there are 137.9 rainfall days, and 27.76" (705mm) of precipitation is accumulated.
When does it snow in Harper?
January through May, October through December are months with snowfall in Harper, Iowa.
When does it snow the most in Harper?
The month with the most snowfall in Harper is January, when snow falls for 9.5 days and typically aggregates up to 4.06" (103mm) of snow.
How many days does it snow in Harper?
In Harper, during the entire year, snow falls for 32.8 days and aggregates up to 12.56" (319mm) of snow.
What is the month with the least sunshine in Harper?
January has the least sunshine of the year, with an average of 4.2h of sunshine.
When is the lowest UV index in Harper?
January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Harper.
What is the driest month in Harper?
The month with the least rainfall is February, when the rain falls for 4.9 days and typically collects 0.98" (25mm) of precipitation.
When is Daylight Saving Time (DST) in Harper?
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 in Harper?
The month with the most rainfall in Harper, Iowa, is May, when the rain falls for 17.7 days and typically aggregates up to 4.17" (106mm) of precipitation.
When it does not snow in Harper?
June through September are months without snowfall in Harper.
When are the longest days in Harper?
June has the longest days of the year in Harper, Iowa, with an average of 15h and 6min of daylight.
What are the months with the highest UV index in Harper?
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 in Harper?
Temperature records mark July as the warmest month, with highs averaging 82°F (27.8°C) and lows at 65.1°F (18.4°C).
What is the most humid month in Harper?
The most humid month is July, with an average relative humidity of 83%.
What month has the most sunshine in Harper?
The month with the most sunshine in Harper, Iowa, is July, with an average of 10.3h of sunshine.
What is the least humid month in Harper?
With an average relative humidity of 72%, October is the least humid month in Harper, Iowa.
What is the month with the shortest days in Harper?
With an average of 9h and 12min of daylight, December has the shortest days of the year in Harper, Iowa.
Average temperature
Harper, IA
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (28.6°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 (15.6°F).
Average pressure
Harper, IA
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.13"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.94"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:
30.01"Hg - Average pressure in November:
30.09"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
Harper, IA
- Average wind speed in January:
10.7mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.5mph - Average wind speed in April:
10.6mph - Average wind speed in May:
8.9mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
7mph - Average wind speed in August:
6.9mph - Average wind speed in September:
8mph - Average wind speed in October:
9.6mph - Average wind speed in November:
10.4mph - Average wind speed in December:
10.1mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity
Harper, IA
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Harper, IA
- Average rainfall in January:
1.06" - Average rainfall in February:
0.98" - Average rainfall in March:
1.97" - Average rainfall in April:
2.87" - Average rainfall in May:
4.17" - Average rainfall in June:
4.02"
- Average rainfall in July:
2.76" - Average rainfall in August:
2.24" - Average rainfall in September:
2.76" - Average rainfall in October:
2.2" - Average rainfall in November:
1.54" - Average rainfall in December:
1.18"
The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days
Harper, IA
- Average rainfall days in January:
5.8 days - Average rainfall days in February:
4.9 days - Average rainfall days in March:
11 days - Average rainfall days in April:
14.7 days - Average rainfall days in May:
17.7 days - Average rainfall days in June:
17.2 days
- Average rainfall days in July:
15.8 days - Average rainfall days in August:
12.3 days - Average rainfall days in September:
12.1 days - Average rainfall days in October:
11.3 days - Average rainfall days in November:
8.3 days - Average rainfall days in December:
6.8 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (4.9 days).
Average snowfall
Harper, IA
- Average snowfall in January:
4.06" - Average snowfall in February:
3.66" - Average snowfall in March:
1.34" - Average snowfall in April:
0.79" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is January (4.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Harper, IA
- Average snowfall days in January:
9.5 days - Average snowfall days in February:
8.4 days - Average snowfall days in March:
4.6 days - Average snowfall days in April:
0.8 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:
0.5 days - Average snowfall days in November:
2.4 days - Average snowfall days in December:
6.5 days
The month with the highest number of snowfall days is January (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Harper, 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 1min - Average sunshine in February:
4h and 2min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 0min - 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 2min - Average sunshine in October:
5h and 4min - 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
Harper, IA
- Average sunshine days in January:
16.6 days - Average sunshine days in February:
15.6 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
12.5 days - Average sunshine days in May:
11 days - Average sunshine days in June:
10.3 days
- Average sunshine days in July:
11.9 days - Average sunshine days in August:
15.5 days - Average sunshine days in September:
15.9 days - Average sunshine days in October:
17.9 days - Average sunshine days in November:
18.7 days - Average sunshine days in December:
19.1 days
The month with the most sunshine days is December (19.1 days).
The month with the least sunshine days is June (10.3 days).
Average UV index
Harper, 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
Harper, IA
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility
Harper, IA
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Harper, Iowa, USA
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