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Contents
- The climate of Mason City
- The best time to visit Mason City
- The worst time to visit Mason City
- Spring weather in Mason City
- Summer weather in Mason City
- Autumn weather in Mason City
- Winter weather in Mason City
- 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 Mason City
Mason City's main weather characteristic falls under the Dfa classification according to Köppen climate system, defining a humid continental climate, devoid of a dry season, presenting hot summers. Lying in the heartland of the United States, Iowa's geographical position contributes to this diverse climate.
Navigating through the climate data measurements, extreme temperature fluctuations are evident across the year with the highest average seeing 79.3°F (26.3°C) in July while dropping to a chilling 9.9°F (-12.3°C) as the lowest average in January. Relative humidity also shows seasonal variation moving from a high of 89% in January to a low of 71% in October.
Rainfall in Mason City is fairly well-distributed throughout the year, achieving its peaks in May at 4.65" (118mm). Exception to this lies in January and February with relatively lower levels of 1.06 and 1.42" (36mm) respectively. Similarly, snowfall utilizes its share on the winter months, from 5.67" (144mm) in January to 4.17" (106mm) in December, leaving little room for snow throughout the rest of the year.
The wind speed averages between 6.4mph (10.3km/h) to 11.6mph (18.7km/h); December experiencing the windiest conditions. Cloud coverage varies from 33% in September to 63% in January depicting a predominantly cloudier outlook for the city.
Navigating through the climate data measurements, extreme temperature fluctuations are evident across the year with the highest average seeing 79.3°F (26.3°C) in July while dropping to a chilling 9.9°F (-12.3°C) as the lowest average in January. Relative humidity also shows seasonal variation moving from a high of 89% in January to a low of 71% in October.
Rainfall in Mason City is fairly well-distributed throughout the year, achieving its peaks in May at 4.65" (118mm). Exception to this lies in January and February with relatively lower levels of 1.06 and 1.42" (36mm) respectively. Similarly, snowfall utilizes its share on the winter months, from 5.67" (144mm) in January to 4.17" (106mm) in December, leaving little room for snow throughout the rest of the year.
The wind speed averages between 6.4mph (10.3km/h) to 11.6mph (18.7km/h); December experiencing the windiest conditions. Cloud coverage varies from 33% in September to 63% in January depicting a predominantly cloudier outlook for the city.
The best time to visit Mason City
Visitors seeking the best weather conditions should plan their trip between May to September. Temperatures during this period range from 67.3°F (19.6°C) to the high 79.3°F (26.3°C), offering a comfortable and warm atmosphere for outdoor activities. The sunshine duration amplifies from 8.4 hours in May to a peak of 9.8 hours in July, making these months the most agreeable for travel enthusiasts.
The worst time to visit Mason City
Travelers considering a winter trip should brace for frigid temperatures and heavy snowfall. From December to February, temperatures plummet, accompanied by considerable snowfall ranging between 4.17" (106mm) in December to 7.48" (190mm) in February. The reduced sunlight hours certainly makes it more challenging for adventurous explorers.
Spring weather in Mason City
Spring in Mason City is signaled by the transition from chilly to mild temperatures. From March to May, daily highs rise gradually from an average of 41.4°F (5.2°C) to 67.3°F (19.6°C). A notable volume of rainfall begins to set in, escalating from 1.69" (43mm) in March to its annual peak of 4.65" (118mm) in May.
Summer weather in Mason City
Summers (June to August) in Mason City unfold under the spell of warm temperatures fluctuating between 72.3°F (22.4°C) to 79.3°F (26.3°C). While these months also experience a moderate amount of rainfall, the city basks in abundant sunshine ranging from 9.4 hours in June to 9.8 hours in July.
Autumn weather in Mason City
In autumn (September to November), the city sees a steady decrease in temperatures from 72.3°F (22.4°C) in September to 42.6°F (5.9°C) by November. While the rainfall experiences a slowdown, the sunlight hours diminish, signaling the upcoming chills of winter.
Winter weather in Mason City
Winter in Mason City (December to February) is characterized by severe cold, with average daily temperatures dropping from 28.2°F (-2.1°C) in December to 9.9°F (-12.3°C) in January. With snowfall disrupting regular activities, this challenging travel period is best suited for winter sports enthusiasts.
Weather in January
The flourishing year engulfs in the cold embrace of January as Mason City, Iowa encounters heavy snowfall. This snowy shuffle is accompanied by a chilling range of temperatures, dipping as low as 9.9°F (-12.3°C) and hardly crossing the freezing point with highs only reaching 22.3°F (-5.4°C). Weather in January »
Weather in February
As February advances, the cold gradually releases its icy grip, with temperatures rising slightly compared to January. The city becomes a silent viewer of the retreat of snowfall, even though snow still covers the ground, it's less abundant. Weather in February »
Weather in March
March marks a transition from the harsh winter to early spring in Mason City, giving way to warmer temperatures, lesser snow, and an increased daylight span. The increased mercury readings, from 27.9°F (-2.3°C) to 41.4°F (5.2°C), bring a resurgence of life after the dormant winter months. Weather in March »
Weather in April
April in Mason City brings a refreshing climatic transformation, ringing in proper springtime weather. Temperatures continue on an upward trajectory, yielding considerable relief from the winter's shivering cold. The blooming flowers and breezy winds envelop the city in a joyful spring spirit. Weather in April »
Weather in May
May in Mason City welcomes longer daylight and warmth as temperatures continue their ascent. The city gets to experience the joy of spring fully with the blossoming flowers and lush green landscapes. The daylight hours reach 14.7 hours, contributing to a significant spike in outdoor activities. Weather in May »
Weather in June
As the warmest month, June brings the summer season in full swing in Mason City. Temperatures crescendo, hitting highs of 76.8°F (24.9°C) and lows not going beneath 60.8°F (16°C). The extended daylight hours enhance outdoor activities bringing more people to parks and recreational areas. Weather in June »
Weather in July
July continues to bask in summer glory, maintaining the high temperatures seen in June. The highest average temperature of 79.3°F (26.3°C) marks this month as the peak of summer in Mason City. The outdoor activities continue in their stride as the sunshine duration reaches the year's maximum. Weather in July »
Weather in August
The transition of weather from July to August in Mason City includes a drop in temperature and more rainfall. The skies often exhibit cloud formations, obstructing sunlight and slightly dimming the summer vibrancy. The wind speed remains steady, offering a refreshing breather from the summer heat. Weather in August »
Weather in September
As Mason City moves into September, the city sees a prominent shift in weather patterns, signaling the arrival of autumn. The temperatures begin to dwindle, and the daylight hours decrease, pointing towards the approaching winter season. Weather in September »
Weather in October
October ushers in cooler temperatures and shorter days in Mason City, epitomizing the typical fall weather. The pleasant weather conditions invite locals and visitors to indulge in outdoor activities and enjoy the city's autumn attractions. Weather in October »
Weather in November
November marks the gradual transition from fall to winter in Mason City, with temperatures dropping to a chilly falling range from 30.2°F (-1°C) to 42.6°F (5.9°C) and a slight increase in rainfall. As the daylight hours recede, residents prepare for indoor activities and festivities. Weather in November »
Weather in December
As the final month of the year, December in Mason City is a blend of holiday cheer and winter fury. Temperatures plunge as the winter season settles in, making warm clothing an absolute necessity. The reduced daylight hours juxtapose with the festive lights illuminating the city, adding to the holiday spirit. Weather in December »
Updated: Aug 25, 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 time of the year is the coldest?
January stands out as Mason City's coldest month, with temperatures ranging between an average high of 22.3°F (-5.4°C) and a low of 9.9°F (-12.3°C).
What is the most humid month?
January is the most humid month, with an average relative humidity of 89%.
What is the driest month?
The month with the least rainfall is January, when the rain falls for 4.5 days and typically collects 1.06" (27mm) of precipitation.
How many days does it rain?
Throughout the year, there are 145.9 rainfall days, and 28.82" (732mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through May, October through December.
How many days does it snow?
In Mason City, during the entire year, snow falls for 60.2 days and aggregates up to 26.26" (667mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 3.5h of sunshine.
What is the month with the lowest UV index?
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
What is the snowiest month in Mason City?
February is the month with the most snowfall in Mason City. Snow falls for 12.9 days and accumulates 7.48" (190mm) 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?
The month with the most rainfall is June, when the rain falls for 19.8 days and typically aggregates up to 4.65" (118mm) 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 18min of daylight.
When is the highest UV index?
With an average maximum UV index of 6, June is the month with the highest UV index.
What is the warmest month in Mason City?
The warmest period is July, when temperatures fluctuate between an average high of 79.3°F (26.3°C) and a low of 62.6°F (17°C).
What month has the most sunshine?
With an average of 9.8h of sunshine, July has the most sunshine of the year.
What is the least humid month?
The least humid month is October, with an average relative humidity of 71%.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 6min of daylight.
Average temperature
Mason City, IA
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (22.3°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 (9.9°F).
Average pressure
Mason City, IA
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.14"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:
29.88"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:
29.99"Hg - Average pressure in November:
30.07"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 (29.88"Hg).
Average wind speed
Mason City, IA
- Average wind speed in January:
10.9mph - Average wind speed in February:
10.8mph - 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:
8.4mph
- Average wind speed in July:
7.3mph - Average wind speed in August:
7.3mph - Average wind speed in September:
8.5mph - Average wind speed in October:
10.1mph - Average wind speed in November:
10.8mph - Average wind speed in December:
10.4mph
The windiest months (with the highest average wind speed) are January and April (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.3mph).
Average humidity
Mason City, IA
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Mason City, IA
- Average rainfall in January:
1.06" - Average rainfall in February:
1.42" - Average rainfall in March:
1.69" - Average rainfall in April:
3.07" - Average rainfall in May:
3.78" - Average rainfall in June:
4.65"
The wettest month (with the highest rainfall) is June (4.65").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days
Mason City, IA
- Average rainfall days in January:
4.5 days - Average rainfall days in February:
3.8 days - Average rainfall days in March:
10.9 days - Average rainfall days in April:
16.3 days - Average rainfall days in May:
19.1 days - Average rainfall days in June:
19.8 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
15.8 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
11.6 days - Average rainfall days in November:
8 days - Average rainfall days in December:
5.8 days
The month with the highest number of rainy days is June (19.8 days).
The month with the least rainy days is February (3.8 days).
Average snowfall
Mason City, IA
- Average snowfall in January:
5.67" - Average snowfall in February:
7.48" - Average snowfall in March:
3.66" - Average snowfall in April:
2.48" - Average snowfall in May:
0.63" - Average snowfall in June:
0"
The month with the highest snowfall is February (7.48").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Mason City, IA
- Average snowfall days in January:
14.6 days - Average snowfall days in February:
12.9 days - Average snowfall days in March:
8.6 days - Average snowfall days in April:
2.9 days - Average snowfall days in May:
0.4 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:
5.6 days - Average snowfall days in December:
13.3 days
The month with the highest number of snowfall days is January (14.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Mason City, IA
- Average daylight in January:
9h and 2min - 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 2min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 4min - Average daylight in December:
9h and 1min
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 3min - Average sunshine in February:
4h and 0min - Average sunshine in March:
5h and 5min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 2min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 4min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days
Mason City, IA
- Average sunshine days in January:
14.2 days - Average sunshine days in February:
12.4 days - Average sunshine days in March:
13.4 days - Average sunshine days in April:
11 days - Average sunshine days in May:
9.7 days - Average sunshine days in June:
8 days
- Average sunshine days in July:
9.6 days - Average sunshine days in August:
13 days - Average sunshine days in September:
15.1 days - Average sunshine days in October:
15.5 days - Average sunshine days in November:
17.2 days - Average sunshine days in December:
14.5 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (8 days).
Average UV index
Mason City, IA
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Mason 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
Mason City, IA
The months with the highest visibility are March, April, May, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, July and December (5mi).
Mason City, Iowa, USA
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