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Mason City, IA weather and climate

Cerro Gordo County, IA · population 27,135 · about 1,112 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Mason City's own coordinates.

The year at a glance

Sunny days
190
clear or partly cloudy, per year
Precipitation
37 in
per year
Wet days
121
rain or snow per year
Snowfall
44 in
per year
Hot days
9
above 90 °F
Freezing nights
158
at or below 32 °F
Humidity
72%
average relative
Average temperature
46 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
255075JanMarMayJulSepNovDaily high, Jan: 24 °FDaily high, Feb: 29 °FDaily high, Mar: 41 °FDaily high, Apr: 56 °FDaily high, May: 69 °FDaily high, Jun: 79 °FDaily high, Jul: 82 °FDaily high, Aug: 80 °FDaily high, Sep: 74 °FDaily high, Oct: 60 °FDaily high, Nov: 43 °FDaily high, Dec: 30 °FDaily low, Jan: 7 °FDaily low, Feb: 11 °FDaily low, Mar: 23 °FDaily low, Apr: 35 °FDaily low, May: 47 °FDaily low, Jun: 58 °FDaily low, Jul: 62 °FDaily low, Aug: 59 °FDaily low, Sep: 50 °FDaily low, Oct: 38 °FDaily low, Nov: 25 °FDaily low, Dec: 14 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high242941566979828074604330
Daily low71123354758625950382514

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.02.04.0JanMarMayJulSepNovMason City, Jan: 1.1 inMason City, Feb: 1.3 inMason City, Mar: 2.4 inMason City, Apr: 4.0 inMason City, May: 5.1 inMason City, Jun: 5.4 inMason City, Jul: 4.0 inMason City, Aug: 4.0 inMason City, Sep: 3.5 inMason City, Oct: 2.7 inMason City, Nov: 1.9 inMason City, Dec: 1.5 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Mason City1.11.32.44.05.15.44.04.03.52.71.91.5

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovMason City, Jan: 12 daysMason City, Feb: 12 daysMason City, Mar: 15 daysMason City, Apr: 14 daysMason City, May: 15 daysMason City, Jun: 16 daysMason City, Jul: 21 daysMason City, Aug: 21 daysMason City, Sep: 20 daysMason City, Oct: 17 daysMason City, Nov: 15 daysMason City, Dec: 12 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Mason City121215141516212120171512

Compare Mason City with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

See weather for every covered Iowa city

About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).