Climate and monthly weather forecastRockwell City, IA
Climate and monthly weather forecast
The climate of Rockwell City
Rockwell City, located in Iowa, USA, falls under the Dfa classification according to the Köppen climate system. This classification represents a humid continental climate with no dry season and hot summers. The characteristics of this climate play out in various ways throughout the year, influencing the city's relative humidity, rain and snowfall patterns, temperature ranges, and daylight hours.Detailed analysis of the climate data reveals that Rockwell City experiences temperatures ranging from 12.7°F (-10.7°C) in the coldest month to 81.1°F (27.3°C) in the warmest. A fluctuation in relative humidity is also apparent, with the highest rates in winter (85%) and the lowest during spring and autumn (around 68%). The city receives the majority of precipitation during spring, peaking at 3.9" (99mm) in May. Interestingly, in terms of snowfall, the winter season records an average of 4.41" (112mm) to 5.31" (135mm) while absolutely no snowfall is observed from June to October.
Daylight varies between 9.5 hours per day in December, the shortest day of the year, to a robust 15.2 hours towards the end of June, giving the city long, pleasant days in summer. Additionally, wind speed is relatively consistent, with an average speed ranging from 7.2mph (11.6km/h) in July to 10.9mph (17.5km/h) in January and April.
The best time to visit Rockwell City
Selecting the ultimate time to visit Rockwell City largely relies on the weather conditions that each visitor finds the most comfortable. For those who prefer moderate temperatures, longer daylight hours, and ample sunshine, May to July would make the excellent choice. These months, falling during summer, provide up to 15.2 hours of daylight, temperatures that go up to 81.1°F (27.3°C), and a UV index of 6, which is relatively high compared to other months.The worst time to visit Rockwell City
In contrast, the winter period from December to February might not be the most favorable time to visit Rockwell City. During these harsh months, the city experiences its lowest temperatures, averaging from 12.7°F (-10.7°C) to 30.7°F (-0.7°C). Additionally, daylight hours are limited to a minimum of 9.1 hours per day in December. The snowfall also peaks during this period with January recording 5.31" (135mm).Spring weather in Rockwell City
Spring in Rockwell City is characterized by gradually rising temperatures and increased rainfall. From borderline freezing temperatures of 30.6°F (-0.8°C) in March, spring heralds warmer days with temperatures shooting up to 69.3°F (20.7°C) by May. This season also witnesses a surge in rainfall with May averaging at 3.9" (99mm). Meanwhile, spring offers more hours of sunshine providing the residents with 6-8.6 hours of sunshine per day.Summer weather in Rockwell City
Summers in Rockwell City, falling between June and August, are warm and inviting with temperatures hitting the peak at 81.1°F (27.3°C) in July. Despite being the hottest month, it has relatively better wind speed at 7.2mph (11.6km/h). The long summer weeks provide 14.6 to 15.2 hours of daylight and an average of up to 10.3 hours of sunshine, permitting residents to make the most of the good weather.Autumn weather in Rockwell City
The transition between the heated summer and chilly winter plays out through the autumn season in Rockwell City. The temperatures, during this phase, steadily drop from a comfortable 74.3°F (23.5°C) in September to a chillier 45°F (7.2°C) by November. The additional factors contributing to the weather conditions during this time are the slight decrease in rainfall, hovering around 2.13" (54mm), and the reduction in daylight to about 9.8 hours by November.Winter weather in Rockwell City
Winter in Rockwell City is truly a cold season owing to the significant drop in temperature. The city records its lowest temperatures during these months, falling to a biting 12.7°F (-10.7°C) in January. Snowfall adds to the winter charm with the city observing 4.41" (112mm) to 5.31" (135mm) of snow during December and January respectively. Despite these cold conditions, the city receives about 4.7 to 5.5 hours of sunshine each day.Weather in January
Extremes define the January climate in Rockwell City, Iowa, with a broad temperature range and considerable snow and rainfall. The mercury fluctuates dramatically, reaching a crisp high of 25.2°F (-3.8°C), while plunging to a chilling 12.7°F (-10.7°C) at the other end of the scale. Weather in January »Weather in February
In Rockwell City, February is highlighted by an increase in temperature and daylight hours compared to January. The more pleasant conditions invite a slight return to outdoor activities as the frigid grip of winter begins to loosen. Weather in February »Weather in March
Rockwell City strides towards spring fully in March, with temperatures rising on both ends, the daylight stretching to 12 hours, and snowfall dwindling down to 2.4" (61mm). March's weather, however, remains unpredictable with a balance of lingering winter chill and teasing warmth of the approaching spring. Weather in March »Weather in April
The weather in Rockwell City takes a warmer turn in April, bringing sunny afternoons and blooming flowers. With a significant decrease in snowfall to just 1.06" (27mm), the ground finally shakes off its winter blanket. However, the longer daylight hours of 13.4 and increased rainfall, reaching a high of 2.87" (73mm), prevents the city from becoming arid. Weather in April »Weather in May
May witnesses a significant boost in temperature levels from April, with the mercury peaking close to the 70°F (21.1°C) mark. The weather in Rockwell City is comparably balmy, perfect for picnics or strolling through the parks. With humidity hovering around 71%, the air becomes noticeably thicker. Weather in May »Weather in June
Rockwell City in June experiences an upgraded summer with sunny days glowing more vividly and temperatures reaching 79.2°F (26.2°C). The city starts emulating an ideal summer setting as rainfall eases to 3.98" (101mm) from May's high and snowfall completely retreating. Weather in June »Weather in July
The peak of summer arrives in Rockwell City in July, boasting the highest temperatures, with the mercury rising up to 81.1°F (27.3°C). Along with the amplified heat, humidity rises more than in June, rendering the atmosphere thick and sultry. Weather in July »Weather in August
Much like July, August in Rockwell City is well into the summer groove but with temperatures gently dipping. The city, lush from the summer growth and energized by the warm weather, exhibits an idyllic summer setting. The rainfall also sees a slight increase from 2.13" (54mm) to 2.68" (68mm). Weather in August »Weather in September
September in Rockwell City is a transition from summer into fall, with temperatures cooling and leaf colors changing. The summer heat slowly subsides, making way for cooler afternoons and crisp evenings. Rainfall persists at 2.56" (65mm), enough to keep parks and gardens lush before autumn fully takes over. Weather in September »Weather in October
In Rockwell City, October is all about witness the full explosion of fall, as leaves shift from vibrant greens to shades of crimson and gold. Temperature continues to cool, adding an increasing charm to the ambiance. A chill in the air is palpable, especially during the evenings. Weather in October »Weather in November
November in Rockwell City marks the transition from autumn to winter, with temperature and daylight hours both taking a deep plunge into cold. The leaves' glow fades into a barren ruggedness, a stark contrast to October's color burst. Weather in November »Weather in December
Rockwell City in December enters the heart of winter, characterized by cold temperatures, short days, and more frequent snowfall. With temperature plummeting down to 19.6°F (-6.9°C), December is a full-fledged winter month. Heaters stay active to combat the cold and snow piles up to 2.52" (64mm). Weather in December »Updated: Feb 12, 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
Rockwell City, Iowa, records the coldest temperatures in January, averaging a high of 25.2°F (-3.8°C) and a low of 12.7°F (-10.7°C).
With an average relative humidity of 85%, January is the most humid month in Rockwell City, Iowa.
The month with the least rainfall in Rockwell City is January, when the rain falls for 4 days and typically collects 0.91" (23mm) of precipitation.
Throughout the year, in Rockwell City, Iowa, there are 128 rainfall days, and 26.18" (665mm) of precipitation is accumulated.
January through May, October through December are months with snowfall in Rockwell City, Iowa.
In Rockwell City, Iowa, during the entire year, snow falls for 39.2 days and aggregates up to 17.64" (448mm) of snow.
The month with the least sunshine is January, with an average of 4.1h of sunshine.
The month with the most snowfall in Rockwell City, Iowa, is February, when snow falls for 9.7 days and typically aggregates up to 5.31" (135mm) of snow.
February is the month with the lowest UV index in Rockwell City, with an average maximum UV index of 1.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Rockwell City, Iowa, 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.
The months with the lowest humidity are April and October, with an average relative humidity of 68%.
June is the month with the most rainfall in Rockwell City, Iowa. Rain falls for 17.6 days and accumulates 3.98" (101mm) of precipitation.
In Rockwell City, Iowa, snow does not fall in June through September.
With an average of 15h and 12min of daylight, June has the longest days of the year in Rockwell City.
The months with the highest UV index are June and July, with an average maximum UV index of 6.
In Rockwell City, Iowa, the peak temperatures are generally noted in July, averaging a high of 81.1°F (27.3°C) and a low of 64°F (17.8°C).
With an average of 10.3h of sunshine, July has the most sunshine of the year in Rockwell City.
With an average of 9h and 6min of daylight, December has the shortest days of the year.
Average temperature
Rockwell City, IA
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (25.2°F).
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).
Average pressure
Rockwell City, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.15"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:
29.88"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed
Rockwell City, IA
- Average wind speed in January:
10.9mph - Average wind speed in February:
10.7mph - Average wind speed in March:
10.6mph - Average wind speed in April:
10.9mph - Average wind speed in May:
9.4mph - Average wind speed in June:
8.5mph
- Average wind speed in July:
7.2mph - Average wind speed in August:
7.3mph - Average wind speed in September:
8.5mph - Average wind speed in October:
9.9mph - Average wind speed in November:
10.5mph - Average wind speed in December:
10.4mph
The windiest months (with the highest average wind speed) are January and April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity
Rockwell City, IA
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are April and October (68%).
Average rainfall
Rockwell City, IA
- Average rainfall in January:
0.91" - Average rainfall in February:
1.18" - Average rainfall in March:
1.42" - Average rainfall in April:
2.87" - Average rainfall in May:
3.9" - Average rainfall in June:
3.98"
- Average rainfall in July:
2.13" - Average rainfall in August:
2.68" - Average rainfall in September:
2.56" - Average rainfall in October:
2.13" - Average rainfall in November:
1.06" - Average rainfall in December:
1.38"
The wettest month (with the highest rainfall) is June (3.98").
The driest month (with the least rainfall) is January (0.91").
Average rainfall days
Rockwell City, IA
- Average rainfall days in January:
4 days - Average rainfall days in February:
3 days - Average rainfall days in March:
10.3 days - Average rainfall days in April:
14.4 days - Average rainfall days in May:
17.1 days - Average rainfall days in June:
17.6 days
- Average rainfall days in July:
14.9 days - Average rainfall days in August:
14.3 days - Average rainfall days in September:
12.2 days - Average rainfall days in October:
9.8 days - Average rainfall days in November:
5.9 days - Average rainfall days in December:
4.5 days
The month with the highest number of rainy days is June (17.6 days).
The month with the least rainy days is February (3 days).
Average snowfall
Rockwell City, IA
- Average snowfall in January:
4.41" - Average snowfall in February:
5.31" - Average snowfall in March:
2.4" - Average snowfall in April:
1.06" - Average snowfall in May:
0.24" - Average snowfall in June:
0"
The month with the highest snowfall is February (5.31").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Rockwell City, IA
- Average snowfall days in January:
9.3 days - Average snowfall days in February:
9.7 days - Average snowfall days in March:
6.2 days - Average snowfall days in April:
1.4 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:
0.7 days - Average snowfall days in November:
3.1 days - Average snowfall days in December:
8.5 days
The month with the highest number of snowfall days is February (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Rockwell City, IA
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 6min
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 6min).
- Average sunshine in January:
4h and 6min - Average sunshine in February:
4h and 54min - Average sunshine in March:
6h and 0min - Average sunshine in April:
8h and 6min - Average sunshine in May:
8h and 36min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
10h and 18min - Average sunshine in August:
9h and 36min - Average sunshine in September:
9h and 12min - Average sunshine in October:
5h and 42min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 42min
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 6min).
Average sunshine days
Rockwell City, IA
- Average sunshine days in January:
19 days - Average sunshine days in February:
15.6 days - Average sunshine days in March:
15.8 days - Average sunshine days in April:
12.6 days - Average sunshine days in May:
11.9 days - Average sunshine days in June:
9.9 days
- Average sunshine days in July:
12.8 days - Average sunshine days in August:
14.3 days - Average sunshine days in September:
16.6 days - Average sunshine days in October:
18.5 days - Average sunshine days in November:
19.9 days - Average sunshine days in December:
19.5 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is June (9.9 days).
Average UV index
Rockwell City, 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
Rockwell City, 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
Rockwell City, 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).
