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Contents
- The climate of Newton
- The best time to visit Newton
- The worst time to visit Newton
- Spring weather in Newton
- Summer weather in Newton
- Autumn weather in Newton
- Winter weather in Newton
- 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
The climate of Newton
Newton, Iowa, USA, falls into the Köppen climate classification of Dfa, indicating a Humid continental climate, with no dry season and hot summers. Geographically, Newton is situated in the Midwest region of the United States.
The climatological parameters display clear changes across the year. High temperature values oscillate from a cold 27.1°F (-2.7°C) in January to a peak of 81.5°F (27.5°C) in July. During the same period, low temperatures vary from a frigid 14.4°F (-9.8°C) in January to a balmy 64.8°F (18.2°C) in July. Thus, the annual temperature range in Newton is quite significant.
Humidity and rainfall also vary significantly as the season progresses, with relative humidity levels fluctuating from 71% to 84%. On average, rainfall amounts change from 0.39" (10mm) in January and February to 2.13" (54mm) in May, the wettest month of the year. In contrast, December is the driest month with only 0.39" (10mm) of precipitation. Averages of snowfall are present from November to April with the heaviest amount of 1.73" (44mm) falling in January.
Wind speeds generally maintain an annual average of around 10mph (16.1km/h), with maximum speeds peaking at 11.1mph (17.9km/h) during the colder months of January, March, and November. Sunshine duration reaches its highest at 10.3 hours in July and contracts to 4.2 hours in January.
The climatological parameters display clear changes across the year. High temperature values oscillate from a cold 27.1°F (-2.7°C) in January to a peak of 81.5°F (27.5°C) in July. During the same period, low temperatures vary from a frigid 14.4°F (-9.8°C) in January to a balmy 64.8°F (18.2°C) in July. Thus, the annual temperature range in Newton is quite significant.
Humidity and rainfall also vary significantly as the season progresses, with relative humidity levels fluctuating from 71% to 84%. On average, rainfall amounts change from 0.39" (10mm) in January and February to 2.13" (54mm) in May, the wettest month of the year. In contrast, December is the driest month with only 0.39" (10mm) of precipitation. Averages of snowfall are present from November to April with the heaviest amount of 1.73" (44mm) falling in January.
Wind speeds generally maintain an annual average of around 10mph (16.1km/h), with maximum speeds peaking at 11.1mph (17.9km/h) during the colder months of January, March, and November. Sunshine duration reaches its highest at 10.3 hours in July and contracts to 4.2 hours in January.
The best time to visit Newton
The ideal time to visit Newton is between May and September when weather conditions are most favorable. During this period, average high temperatures maintain between 69.3°F (20.7°C) and 81.5°F (27.5°C), creating an optimum climate for outdoor activities. Also, these months receive the most extended duration of sunlight, from 14.6 hours in May to 15.2 hours in June, suitable for sightseeing and exploring.
The worst time to visit Newton
January and February are considered the least comfortable months due to harsh winter conditions. During these months, temperatures can plummet to as low as 14.4°F (-9.8°C) to 17.4°F (-8.1°C). Furthermore, the amount of daylight is also at its lowest, with only 9.6 to 10.6 hours of daylight in January and February respectively.
Spring weather in Newton
Spring in Newton, encompassing March through May, is a period of warming and increased rainfall. Temperatures gradually rise from 46.4°F (8°C) to 69.3°F (20.7°C), while the average amount of rainfall peaks at 2.13" (54mm) in May. The length of daylight also starts to increase significantly, from 12 hours in March to 14.6 hours in May.
Summer weather in Newton
The summer months, June through August, are the warmest in Newton with temperatures peaking at 81.5°F (27.5°C) in July. The nights remain comfortable, with low temperatures fluctuating between 62.4°F (16.9°C) and 64.8°F (18.2°C). Humidity and rainfall are also at their highest during this time, reaching 82% and 1.85" (47mm) in June.
Autumn weather in Newton
Autumn, covering September through November, sees a gradual cooling of the weather in Newton. High temperatures fall from 74.7°F (23.7°C) in September to 46.9°F (8.3°C) in November, while the nights become colder with lows reaching 32.4°F (0.2°C) in November. Rainfall averages decrease to 0.67" (17mm) from 1.3" (33mm) as the season progresses, and the duration of daylight reduces to 9.8 hours by November.
Winter weather in Newton
Winters in Newton, from December to February, are characterized by cold temperatures and significant snowfall. High temperatures fall to as low as 27.1°F (-2.7°C) in January, while lows reach a freezing point of 14.4°F (-9.8°C). There are around 8.4 snowfall days in January, with an average of 1.73" (44mm) of snow. The daily sunlight duration is also at its shortest, with only 9.6 hours in December.
Weather in January
In Newton, Iowa, the beginning of the year greets residents with winter's chill. As the coldest month of the year, temperatures can drop as low as 14.4°F (-9.8°C), making it important to wrap up warm. The consistently low temperatures combined with short daylight hours of 9.6 hours promote a heavy reliance on indoor heating. Weather in January »
Weather in February
Moving into February, Newton experiences a slight uptick in temperature, though winter's hold remains firm. The increase in snowfall days from 8.4 to 7.3 suggests slightly milder conditions. With only 10.6 daylight hours and a UV index of 2, February retains its wintery character. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Newton, Iowa, with an average temperature fluctuating between 46.4°F (8°C) and 31.5°F (-0.3°C). March's arrival signals a significant increase in average high-temperatures, soaring from February's subzero cold 31.5°F (-0.3°C) to a frosty 46.4°F (8°C). Weather in March »
Weather in April
April is a refreshing spring month in Newton, Iowa, with an average temperature varying between 41.9°F (5.5°C) and 58.8°F (14.9°C). As April begins, there is an increase in the average high-temperature, moving from a chilly 46.4°F (8°C) in March to a refreshing 58.8°F (14.9°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Newton, Iowa, with temperature in the range of an average low of 52.5°F (11.4°C) and an average high of 69.3°F (20.7°C). In Newton, the average high-temperature in May rises, from a mild 58.8°F (14.9°C) in April, to a pleasant 69.3°F (20.7°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Newton, Iowa, with an average temperature fluctuating between 62.4°F (16.9°C) and 79.3°F (26.3°C). The start of June is characterized by an increase in the average high-temperature, transitioning from a pleasant 69.3°F (20.7°C) in May to a moderately hot 79.3°F (26.3°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Newton, Iowa, with an average temperature varying between 81.5°F (27.5°C) and 64.8°F (18.2°C). July is the month when Newton sees the highest average temperatures, with a high of 81.5°F (27.5°C) and a low of 64.8°F (18.2°C). Throughout July, the heat index is estimated at a tropical 87.8°F (31°C). Weather in July »
Weather in August
August, the last month of the summer in Newton, is also a moderately hot month, with an average temperature ranging between min 62.2°F (16.8°C) and max 80.6°F (27°C). Newton ushers in August with an average high-temperature of a still warm 80.6°F (27°C), showing a close resemblance to the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Newton, Iowa, with temperature in the range of an average high of 74.7°F (23.7°C) and an average low of 55.8°F (13.2°C). During the shift to September, Newton records a mild decrease in average high-temperature, moving from 80.6°F (27°C) in August to a still moderately hot 74.7°F (23.7°C). Weather in September »
Weather in October
October, the same as September, in Newton, Iowa, is another mild autumn month, with an average temperature ranging between min 44.2°F (6.8°C) and max 59.9°F (15.5°C). October is characterized by a clear drop in the average high-temperature, falling from September's moderately hot 74.7°F (23.7°C) to a moderate 59.9°F (15.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Newton, Iowa, with an average temperature ranging between min 32.4°F (0.2°C) and max 46.9°F (8.3°C). In November, the average high-temperature decreases from a moderate 59.9°F (15.5°C) in October 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 Newton, Iowa, with an average temperature fluctuating between 33.8°F (1°C) and 22.1°F (-5.5°C). The transition into December involves a decrease in the average high-temperature, falling from a frosty 46.9°F (8.3°C) in November to a cold 33.8°F (1°C). Weather in December »
Updated: Jun 18, 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?
Newton's coldest month, January, generally records average temperatures ranging from a high of 27.1°F (-2.7°C) to a low of 14.4°F (-9.8°C).
What is the most humid month?
January is the most humid month, with an average relative humidity of 84%.
What is the driest month?
The months with the least rainfall are January, February and December Rain falls for 3.8 days and accumulates 0.39" (10mm) of rain.
How many days does it rain?
In Newton, during the entire year, the rain falls for 106.7 days and collects up to 11.77" (299mm) of precipitation.
When does it snow?
January through May, October through December are months with snowfall.
When does it snow the most?
The month with the most snowfall is January, when snow falls for 8.4 days and typically aggregates up to 1.73" (44mm) of snow.
How many days does it snow in Newton?
In Newton, during the entire year, snow falls for 28.8 days and aggregates up to 5.28" (134mm) of snow.
What is the month with the least sunshine?
With an average of 4.2h of sunshine, January has the least sunshine of the year in Newton.
When is the lowest UV index?
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
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?
May is the month with the most rainfall. Rain falls for 14.7 days and accumulates 2.13" (54mm) of precipitation.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
June has the longest days of the year, with an average of 15h and 12min of daylight.
What is the month with the highest UV index?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What part of the year is the hottest?
Newton's temperature records reveal July as the warmest month, marked by average highs of 81.5°F (27.5°C) and lows 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.
What is the least humid month?
October is the least humid month in Newton, Iowa, with an average relative humidity of 71%.
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
Newton, IA
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (27.1°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 (14.4°F).
Average pressure
Newton, IA
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.07"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:
30.01"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
Newton, IA
- Average wind speed in January:
10.5mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.6mph - Average wind speed in May:
9mph - Average wind speed in June:
8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity
Newton, IA
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Newton, IA
- Average rainfall in January:
0.39" - Average rainfall in February:
0.39" - Average rainfall in March:
0.75" - Average rainfall in April:
1.02" - Average rainfall in May:
2.13" - Average rainfall in June:
1.85"
The wettest month (with the highest rainfall) is May (2.13").
The driest months (with the least rainfall) are January, February and December (0.39").
Average rainfall days
Newton, IA
- Average rainfall days in January:
3.8 days - Average rainfall days in February:
3.4 days - Average rainfall days in March:
8.8 days - Average rainfall days in April:
11.1 days - Average rainfall days in May:
14.7 days - Average rainfall days in June:
14.5 days
- Average rainfall days in July:
12.9 days - Average rainfall days in August:
10.7 days - Average rainfall days in September:
9.6 days - Average rainfall days in October:
7 days - Average rainfall days in November:
5.9 days - Average rainfall days in December:
4.3 days
The month with the highest number of rainy days is May (14.7 days).
The month with the least rainy days is February (3.4 days).
Average snowfall
Newton, IA
- Average snowfall in January:
1.73" - Average snowfall in February:
1.54" - Average snowfall in March:
0.79" - Average snowfall in April:
0.24" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is January (1.73").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Newton, IA
- Average snowfall days in January:
8.4 days - Average snowfall days in February:
7.3 days - Average snowfall days in March:
4.9 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:
0.5 days - Average snowfall days in November:
1.7 days - Average snowfall days in December:
5 days
The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Newton, 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:
4h and 3min - Average sunshine in March:
6h and 1min - Average sunshine in April:
8h and 0min - 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 5min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 3min - 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
Newton, IA
- Average sunshine days in January:
21.8 days - Average sunshine days in February:
19.1 days - Average sunshine days in March:
18.3 days - Average sunshine days in April:
16.5 days - Average sunshine days in May:
13.6 days - Average sunshine days in June:
12.2 days
- Average sunshine days in July:
14.8 days - Average sunshine days in August:
17.2 days - Average sunshine days in September:
18.1 days - Average sunshine days in October:
21.6 days - Average sunshine days in November:
22.2 days - Average sunshine days in December:
22.9 days
The month with the most sunshine days is December (22.9 days).
The month with the least sunshine days is June (12.2 days).
Average UV index
Newton, IA
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Newton, IA
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July and September (Cloud cover 30).
Average visibility
Newton, 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).
Newton, Iowa, USA
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