Climate and monthly weather forecastCharles City, IA
Climate and monthly weather forecast
The climate of Charles City
Charles City, located in the US state of Iowa, experiences a variety of weather conditions throughout the year, reflecting the Dfa Köppen climate classification - a humid continental climate, with a hot summer and no dry season. Geographically situated away from the mitigating influences of large bodies of water, the city sees palpable shifts in weather parameters with each changing season.Throughout the year, temperatures in Charles City display a wide range, peaking at an average high of 79.2°F (26.2°C) in July, and plunging to a chilly average low of 10.6°F (-11.9°C) in January. The relative humidity varies less dramatically, oscillating between 72% in October and a slightly sticky 88% in January. The city is no stranger to precipitation, with rainfall between 1.14" (29mm) in January and a substantial 4.17" (106mm) in June, while snowfall can reach up to 6.5" (165mm) in February.
Charles City sees a noteworthy change in daylight hours between 9.1 in December to a generous 15.3 in June. Sunshine hours also follow a similar pattern, stretching from 3.5 hours in January to a maximum of 9.7 in July and August. The wind picks up speed starting from 7.1mph (11.4km/h) in July and August, reaching a maximum of 10.7mph (17.2km/h) in April, adding a nippy breeze to the air during these months.
The best time to visit Charles City
Considering the range in weather conditions, the optimal time to visit Charles City would be between May and August. These months promise charming warmth, with average high temperatures oscillating between 66.7°F (19.3°C) and 79.2°F (26.2°C). The city comes to life during these sunny months, offering up to 15.3 hours of daylight and plentiful sunshine, reaching up to 9.7 hours per day. The relative humidity stays comfortably below 84%, and the rainfall is fairly manageable, with averages ranging from 2.48" (63mm) to 4.17" (106mm).The worst time to visit Charles City
Conversely, the least friendly months in terms of weather in Charles City occur from November to March. These months bear the brunt of the freezing winter, with temperatures nose-diving to an average low between 10.6°F (-11.9°C) to 30.2°F (-1°C). Combined with a heightened relative humidity of up to 88% in January, the chill is likely to feel more pronounced. The reduction in daylight hours, dropping to as low as 9.1 hours in December, and a high likelihood of snowfall with maximum reaches of up to 6.5" (165mm) in February, may also prove uninviting to visitors.Spring weather in Charles City
Spring in Charles City, covering March to May, ushers in a gradual warming trend. Temperatures gradually rise with an average high from 41.5°F (5.3°C) in March to 66.7°F (19.3°C) in May while the average low temperature ranges between 27.7°F (-2.4°C) and 50.5°F (10.3°C). Rainfall begins to pick up, especially in May when it reaches 3.82" (97mm). Sunshine hours also see an increase, rising to 8.3 hours daily in May, allowing for more outdoor activities.Summer weather in Charles City
Summer brings increased warmth to Charles City, with average high temperatures from 76.6°F (24.8°C) to 79.2°F (26.2°C) between June and August. Humidity peaks at 84% in July, though it is moderated by the summer breeze, averaging around 7.1mph (11.4km/h). Despite the escalating temperatures, rain doesn't shy away, peaking at 4.17" (106mm) in June. This period also welcomes the most amount of daylight, with up to 15.3 hours in June, along with a healthy serving of sunshine, embracing the city with up to 9.7 hours of golden rays in July and August.Autumn weather in Charles City
Autumn signals a downturn in Charles City's weather. Temperatures take a dip, with average highs from 72.1°F (22.3°C) in September to 42.8°F (6°C) in November. The average low extends from 53.4°F (11.9°C) down to 30.2°F (-1°C). October experiences the least humidity at 72%. Rainfall levels decrease as well, hovering between 2.09" (53mm) to 1.46" (37mm). Daylight hours begin their steady decline to 9.7 hours in November, shadowed by a decrease in sunshine hours to 5.1 hours in the same month.Winter weather in Charles City
Winter in Charles City brings a surge in chilly weather, with December to February featuring average highs between 28.4°F (-2°C) and 41.5°F (5.3°C) while the average low plunges to a freezing range of 10.6°F (-11.9°C) to 27.7°F (-2.4°C). Rainfall recedes significantly, with averages around 1.14" (29mm) to 1.77" (45mm). Concurrently, the city sees an uptick in snowfall, soaring to as high as 6.5" (165mm) in February. The shorter daylight hours spanning from 9.1 hours to 10.6 hours, and sunshine hours dwindling to between 3.5 hours and 5.9 hours add a chill to the wintery air. This period brings the highest relative humidity readings, at 88% in January, further intensifying the cold.Weather in January
January weather in Charles City, Iowa is typified by cold and snowy conditions, making it the deepest winter month. There’s an evident shift from the previous December as both the maximum and minimum temperatures register notable drops to 22.6°F (-5.2°C) and 10.6°F (-11.9°C) respectively. Weather in January »Weather in February
As the calendar flips to February, Charles City experiences a slight improvement in the chilly conditions of January, welcoming a bit warmer weather. The rise in temperatures is palpable, albeit, it is still a coat-and-scarf time of the year. Weather in February »Weather in March
The imminent arrival of spring is felt in Charles City with the March weather showing definitive signs of warming. The shift from the biting temperatures of February is profound, accelerating the melting of the snow that beautifully mantles the city. Weather in March »Weather in April
April meaningfully pushes the weather transition in Charles City, as the bleak remnants of winter are displaced with the invigorating ambiance of spring. A significant rise in temperature provides a pleasant atmosphere, hinting at the easing out of the biting cold of March. Weather in April »Weather in May
May introduces a sunnier disposition to Charles City, Iowa, with the weather now firmly inside the domain of spring. The departure from the April showers and chill is significant, providing ample opportunities for outdoor pursuits. Weather in May »Weather in June
June in Charles City offers a delightful weather scenario, solidly charting the transition from the pleasant spring of May to the anticipated heat of summer. Temperatures rise substantially, nudging people to trade their spring attire for more comfortable summer wear. Weather in June »Weather in July
July showcases the epitome of summer in Charles City, Iowa, with temperatures soaring to the warmest of the year. The weather contrasts significantly with June, as both the mercury and humidity levels see a substantial increase. A decrease in rainfall to 2.48" (63mm) assures that the city witnesses drier days, inviting residents to relish the outdoors. Weather in July »Weather in August
August characterises the tail end of summer in Charles City, with the weather slightly dialing back from July's heat. While temperatures remain high, a noticeable decrease suggests an impending transition. A further drop to 2.2" (56mm) in rain signifies drier days, ideal for packing out picnic baskets. Weather in August »Weather in September
September welcomes a remarkable change in weather in Charles City as the heat of August gives way to the mildness of fall. Temperatures start dipping, alluding to the forthcoming fall season. The precipitation levels continue to stay low at 2.09" (53mm), paving the way for outdoor autumn activities. Weather in September »Weather in October
October in Charles City brings with it a definitive shift in weather, highlighting the heart of the fall season. As the warmth of September gradually depletes, residents start reaching for their layers again. Although rain persists in equal measure from September to October at 2.2" (56mm), snowflakes start to make their appearance with an average of 0.2" (5mm) of snowfall. Weather in October »Weather in November
The transition to winter begins earnestly in Charles City with November weather showing a clear drop in temperatures from the previous month. The pleasant fall of October is replaced by a chill that begins to bite, and it becomes increasingly harder to ignore the winter's imminent arrival. Weather in November »Weather in December
December in Charles City, Iowa, displays a robust winter scene, as the milder weather of November stands replaced by colder temperatures. Residents embrace the harshest month of winter, adorned in their warmest attire. The snowfall inches its way up to 4.84" (123mm), creating a winter wonderland across the city. Weather in December »Updated: Aug 2, 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
January is the month when Charles City, Iowa, experiences its coldest temperatures, averaging a high of 22.6°F (-5.2°C) and a low of 10.6°F (-11.9°C).
January is the most humid month, with an average relative humidity of 88%.
The month with the least rainfall is January, when the rain falls for 4.8 days and typically collects 1.14" (29mm) of precipitation.
In Charles City, during the entire year, the rain falls for 136.1 days and collects up to 27.32" (694mm) of precipitation.
January through May, October through December are months with snowfall.
Throughout the year, there are 59.5 snowfall days, and 25.04" (636mm) of snow is accumulated.
With an average of 3.5h of sunshine, January has the least sunshine of the year.
The months with the lowest UV index are January, February and December, with an average maximum UV index of 1.
The month with the most snowfall in Charles City is February, when snow falls for 12.5 days and typically aggregates up to 6.5" (165mm) of snow.
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.
The month with the most rainfall is June, when the rain falls for 18.6 days and typically aggregates up to 4.17" (106mm) of precipitation.
In Charles City, snow does not fall in June through September.
The month with the longest days is June, with an average of 15h and 18min of daylight.
June is the month with the highest UV index, with an average maximum UV index of 6.
In Charles City, July records the average highest temperatures, peaking at 79.2°F (26.2°C) and reaching a low of 62.6°F (17°C).
July and August, with an average of 9.7h of sunshine, are months with the most sunshine.
With an average relative humidity of 72%, October is the least humid month.
December has the shortest days of the year, with an average of 9h and 6min of daylight.
Average temperature
Charles City, IA
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (22.6°F).
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure
Charles City, IA
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.13"Hg - Average pressure in March:
30.08"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:
29.96"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed
Charles City, IA
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9.3mph - Average wind speed in June:
8.2mph
- Average wind speed in July:
7.1mph - Average wind speed in August:
7.1mph - Average wind speed in September:
8.3mph - Average wind speed in October:
9.9mph - Average wind speed in November:
10.4mph - Average wind speed in December:
10.1mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity
Charles City, IA
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Charles City, IA
- Average rainfall in January:
1.14" - Average rainfall in February:
1.34" - Average rainfall in March:
1.77" - Average rainfall in April:
2.95" - Average rainfall in May:
3.82" - Average rainfall in June:
4.17"
The wettest month (with the highest rainfall) is June (4.17").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days
Charles City, IA
- Average rainfall days in January:
4.8 days - Average rainfall days in February:
4.3 days - Average rainfall days in March:
10 days - Average rainfall days in April:
15 days - Average rainfall days in May:
19.2 days - Average rainfall days in June:
18.6 days
- Average rainfall days in July:
15.3 days - Average rainfall days in August:
13.2 days - Average rainfall days in September:
11.2 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
5.5 days
The month with the highest number of rainy days is May (19.2 days).
The month with the least rainy days is February (4.3 days).
Average snowfall
Charles City, IA
- Average snowfall in January:
5.55" - Average snowfall in February:
6.5" - Average snowfall in March:
3.07" - Average snowfall in April:
2.24" - Average snowfall in May:
0.47" - Average snowfall in June:
0"
The month with the highest snowfall is February (6.5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Charles City, IA
- Average snowfall days in January:
14.3 days - Average snowfall days in February:
12.5 days - Average snowfall days in March:
8.7 days - Average snowfall days in April:
2.8 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:
1.9 days - Average snowfall days in November:
5.2 days - Average snowfall days in December:
13.8 days
The month with the highest number of snowfall days is January (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Charles City, IA
- Average daylight in January:
9h and 24min - 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 42min - Average daylight in June:
15h and 18min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - Average daylight in December:
9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January:
3h and 30min - Average sunshine in February:
3h and 54min - Average sunshine in March:
5h and 54min - Average sunshine in April:
7h and 24min - Average sunshine in May:
8h and 18min - Average sunshine in June:
9h and 24min
- Average sunshine in July:
9h and 42min - Average sunshine in August:
9h and 42min - Average sunshine in September:
8h and 54min - Average sunshine in October:
5h and 18min - Average sunshine in November:
5h and 6min - Average sunshine in December:
4h and 6min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days
Charles City, IA
- Average sunshine days in January:
13.8 days - Average sunshine days in February:
12.7 days - Average sunshine days in March:
13.5 days - Average sunshine days in April:
10.7 days - Average sunshine days in May:
9.6 days - Average sunshine days in June:
9.3 days
- Average sunshine days in July:
12.6 days - Average sunshine days in August:
15.2 days - Average sunshine days in September:
16.8 days - Average sunshine days in October:
17.5 days - Average sunshine days in November:
17.3 days - Average sunshine days in December:
14.3 days
The month with the most sunshine days is October (17.5 days).
The month with the least sunshine days is June (9.3 days).
Average UV index
Charles City, IA
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover
Charles City, IA
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility
Charles City, IA
The months with the highest visibility are March, April, May, June, September, October and November (6mi).
The months with the lowest visibility are January, February, July, August and December (5mi).
