Hot-summer humid continental climate
Climate Mason City - Iowa
Annual high56ºF
Annual low35ºF
Precipitation35.2 inch
| Month | HighºF | LowºF | Precipinch | Snowinch |
|---|---|---|---|---|
| Jan | 25 | 7 | 0.82 | 11 |
| Feb | 29 | 12 | 1.00 | 8 |
| Mar | 42 | 24 | 2.23 | 6 |
| Apr | 58 | 35 | 3.75 | 3 |
| May | 70 | 47 | 4.68 | 0 |
| Jun | 80 | 57 | 5.14 | 0 |
| Jul | 83 | 61 | 4.70 | 0 |
| Aug | 81 | 58 | 4.04 | 0 |
| Sep | 73 | 49 | 3.27 | 0 |
| Oct | 60 | 37 | 2.45 | 0 |
| Nov | 43 | 24 | 1.88 | 4 |
| Dec | 28 | 11 | 1.24 | 9 |
- JanHigh 25ºFLow 7ºFPrecip 0.82 inch
- FebHigh 29ºFLow 12ºFPrecip 1.00 inch
- MarHigh 42ºFLow 24ºFPrecip 2.23 inch
- AprHigh 58ºFLow 35ºFPrecip 3.75 inch
- MayHigh 70ºFLow 47ºFPrecip 4.68 inch
- JunHigh 80ºFLow 57ºFPrecip 5.14 inch
- JulHigh 83ºFLow 61ºFPrecip 4.70 inch
- AugHigh 81ºFLow 58ºFPrecip 4.04 inch
- SepHigh 73ºFLow 49ºFPrecip 3.27 inch
- OctHigh 60ºFLow 37ºFPrecip 2.45 inch
- NovHigh 43ºFLow 24ºFPrecip 1.88 inch
- DecHigh 28ºFLow 11ºFPrecip 1.24 inch
Climate summary
What is the average weather in Mason City, Iowa?
Mason City experiences a humid continental climate, marked by very large seasonal temperature contrasts. Summers are warm and fairly wet, with June being the wettest month. Winters are cold and snowy, bringing significant snowfall, while January is the driest month. Precipitation is spread relatively evenly through the year, with winter moisture often arriving as snow.
Mason City weather averages
Annual high56ºF
Annual low35ºF
Precipitation35.2 inch
Snowfall41 inch
Daily normals Mason City - Iowa - January
| Day | HighºF | LowºF | Prec/ | Prec/ | Snow/ | Snow/ |
|---|---|---|---|---|---|---|
| Jan 1 | 25.1 | 9.2 | 0.03 | 0.03 | 0.30 | 0.30 |
| Jan 2 | 25.0 | 9.0 | 0.06 | 0.06 | 0.70 | 0.70 |
| Jan 3 | 24.8 | 8.7 | 0.09 | 0.09 | 1.00 | 1.00 |
| Jan 4 | 24.7 | 8.5 | 0.12 | 0.12 | 1.30 | 1.30 |
| Jan 5 | 24.6 | 8.3 | 0.15 | 0.15 | 1.70 | 1.70 |
| Jan 6 | 24.4 | 8.1 | 0.18 | 0.18 | 2.00 | 2.00 |
| Jan 7 | 24.3 | 7.9 | 0.21 | 0.21 | 2.40 | 2.40 |
| Jan 8 | 24.2 | 7.8 | 0.24 | 0.24 | 2.70 | 2.70 |
| Jan 9 | 24.1 | 7.6 | 0.27 | 0.27 | 3.00 | 3.00 |
| Jan 10 | 24.1 | 7.4 | 0.30 | 0.30 | 3.40 | 3.40 |
| Jan 11 | 24.0 | 7.3 | 0.32 | 0.32 | 3.70 | 3.70 |
| Jan 12 | 23.9 | 7.1 | 0.35 | 0.35 | 4.10 | 4.10 |
| Jan 13 | 23.9 | 7.0 | 0.38 | 0.38 | 4.50 | 4.50 |
| Jan 14 | 23.8 | 6.9 | 0.41 | 0.41 | 4.90 | 4.90 |
| Jan 15 | 23.8 | 6.8 | 0.44 | 0.44 | 5.20 | 5.20 |
| Jan 16 | 23.8 | 6.7 | 0.46 | 0.46 | 5.60 | 5.60 |
| Jan 17 | 23.8 | 6.6 | 0.49 | 0.49 | 6.00 | 6.00 |
| Jan 18 | 23.8 | 6.5 | 0.52 | 0.52 | 6.30 | 6.30 |
| Jan 19 | 23.8 | 6.5 | 0.54 | 0.54 | 6.70 | 6.70 |
| Jan 20 | 23.8 | 6.4 | 0.57 | 0.57 | 7.10 | 7.10 |
| Jan 21 | 23.9 | 6.4 | 0.60 | 0.60 | 7.50 | 7.50 |
| Jan 22 | 23.9 | 6.4 | 0.62 | 0.62 | 7.90 | 7.90 |
| Jan 23 | 23.9 | 6.4 | 0.65 | 0.65 | 8.30 | 8.30 |
| Jan 24 | 24.0 | 6.4 | 0.68 | 0.68 | 8.60 | 8.60 |
| Jan 25 | 24.1 | 6.5 | 0.71 | 0.71 | 9.00 | 9.00 |
| Jan 26 | 24.2 | 6.5 | 0.74 | 0.74 | 9.40 | 9.40 |
| Jan 27 | 24.3 | 6.6 | 0.77 | 0.77 | 9.80 | 9.80 |
| Jan 28 | 24.4 | 6.7 | 0.80 | 0.80 | 10.20 | 10.20 |
| Jan 29 | 24.5 | 6.8 | 0.83 | 0.83 | 10.60 | 10.60 |
| Jan 30 | 24.6 | 6.9 | 0.86 | 0.86 | 10.90 | 10.90 |
| Jan 31 | 24.7 | 7.1 | 0.89 | 0.89 | 11.30 | 11.30 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Mason City - October 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Oct 1 | 66.9 | 43.0 | 0.22 |
| Oct 2 | 66.0 | 37.9 | 0.00 |
| Oct 3 | 73.0 | 43.0 | T |
| Oct 4 | – | – | – |
| Oct 5 | – | – | – |
| Oct 6 | – | – | – |
| Oct 7 | 75.9 | 46.9 | 0.00 |
| Oct 8 | 73.0 | 43.0 | 0.00 |
| Oct 9 | 79.0 | 48.0 | 0.00 |
| Oct 10 | 86.0 | 55.0 | 0.00 |
| Oct 11 | 89.1 | 55.9 | 0.00 |
| Oct 12 | 87.1 | 59.0 | 0.00 |
| Oct 13 | 66.9 | 46.9 | 0.00 |
| Oct 14 | 55.9 | 43.0 | 0.00 |
| Oct 15 | 55.0 | 43.0 | 0.84 |
| Oct 16 | 54.0 | 33.1 | 0.03 |
| Oct 17 | – | – | – |
| Oct 18 | 68.0 | 37.9 | 0.00 |
| Oct 19 | – | – | – |
| Oct 20 | – | – | – |
| Oct 21 | 75.0 | 41.0 | 0.00 |
| Oct 22 | 78.1 | 43.0 | 0.00 |
| Oct 23 | 68.0 | 48.9 | T |
| Oct 24 | 78.1 | 51.1 | 0.00 |
| Oct 25 | 64.9 | 46.0 | 0.00 |
| Oct 26 | 60.1 | 46.9 | T |
| Oct 27 | 60.1 | 50.0 | 0.14 |
| Oct 28 | 73.0 | 51.1 | 0.15 |
| Oct 29 | – | – | – |
| Oct 30 | – | – | – |
| Oct 31 | – | – | – |
The data for October 2026 is incomplete: some days or values are missing.
- –No data
- –Not yet observed or received
- TTrace, too small to measure
Observed extremes
- Highest max temperature89.1ºF · Oct 11
- Lowest max temperature54.0ºF · Oct 16
- Highest min temperature59.0ºF · Oct 12
- Lowest min temperature33.1ºF · Oct 16
Geo Mason City - Iowa
Location
- Country
- United States
- State
- Iowa
- County
- Cerro Gordo
- City
- Mason City
- Zip Code
- 50401
- Elevation
- 1138 ft
- Longitude
- -93.20
- Latitude
- 43.15
- ICAO
- –
- IATA
- –