Annual mean 9°C · wettest around May · prevailing wind SW
Warmest
26.3 °C
Coldest
-7.3 °C
Wettest
71%
Windiest
7.2 m/s
Prevailing
SW
5.4 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Mason City over the whole year is 9°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -9°C. Mason City has no sharply defined rainy season: the chance of rain on a given day runs from 60% in February, the driest month, to 66% in May, the wettest. Winds in Mason City are highest in April, averaging 5.4 m/s (19 km/h), and lightest in August, at 2.8 m/s (10 km/h). The prevailing wind is from the SW. The clearest skies in Mason City come in July, when the sky is typically 28% covered; January is the cloudiest month, at 55%.
Month by month Mason City climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
-6°C
-9°C
-13°C
62%
55%
4.7 m/s
0
0
0
February
-4°C
-9°C
-10°C
60%
43%
4.8 m/s
0
0
3
March
4°C
-2°C
-2°C
64%
49%
5.0 m/s
1
0
13
April
11°C
4°C
5°C
65%
48%
5.4 m/s
12
0
36
May
19°C
11°C
15°C
66%
43%
4.3 m/s
47
8
63
June
25°C
18°C
24°C
66%
31%
3.9 m/s
62
40
38
July
26°C
19°C
26°C
65%
28%
2.9 m/s
55
57
22
August
25°C
17°C
25°C
64%
32%
2.8 m/s
64
44
34
September
22°C
13°C
20°C
65%
32%
3.3 m/s
65
24
56
October
14°C
6°C
9°C
65%
40%
4.1 m/s
25
1
51
November
5°C
-1°C
-1°C
63%
44%
4.7 m/s
5
0
17
December
-2°C
-6°C
-8°C
62%
52%
4.6 m/s
0
0
2
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Mason City weather by season
Year round, Mason City has days of about -6°C at their warmest in January, its coolest month, and 26°C in July, its warmest; the coolest hours of the day run from -9°C to 19°C through the year, and the average temperature over the year is 9°C around the clock. Rain is most likely around May and least likely around February. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Mason City weather in winterDecember to February
High -4°CLow -8°CRain 61%
Winter in Mason City has typical daily highs of about -4°C and lows of about -8°C, with a 61% chance of rain on a given day.
Mason City weather in springMarch to May
High 11°CLow 4°CRain 65%
Spring in Mason City has typical daily highs of about 11°C and lows of about 4°C, with a 65% chance of rain on a given day.
Mason City weather in summerJune to August
High 25°CLow 18°CRain 65%
Summer in Mason City has typical daily highs of about 25°C and lows of about 18°C, with a 65% chance of rain on a given day.
Mason City weather in autumnSeptember to November
High 14°CLow 6°CRain 64%
Autumn in Mason City has typical daily highs of about 14°C and lows of about 6°C, with a 64% chance of rain on a given day.
When is the rainy season in Mason City?
Mason City has no sharply defined rainy season: the chance of rain on a given day runs from 60% in February, the driest month, to 66% in May, the wettest.
What time of year is Mason City windiest?
Winds in Mason City are highest in April, averaging 5.4 m/s (19 km/h), and lightest in August, at 2.8 m/s (10 km/h). The prevailing wind is from the SW.
What is the average temperature in Mason City year round?
The average temperature in Mason City over the whole year is 9°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -9°C.