Mason City, IA
Climate overview — based on NOAA 1991-2020 normals from MASON CITY #1, IA US.
Year-round temperatures (°F)
Avg high
Avg low
Best time to visit Mason City
Full guide →Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | °F | °F | °F | 0.92 in | — | 7 |
| February | °F | °F | °F | 1.30 in | — | 8 |
| March | °F | °F | °F | 2.21 in | — | 9 |
| April | °F | °F | °F | 4.30 in | — | 12 |
| May | °F | °F | °F | 5.47 in | — | 14 |
| June | °F | °F | °F | 5.72 in | — | 12 |
| July | °F | °F | °F | 4.69 in | — | 9 |
| August | °F | °F | °F | 3.74 in | — | 9 |
| September | °F | °F | °F | 3.32 in | — | 9 |
| October | °F | °F | °F | 2.74 in | — | 9 |
| November | °F | °F | °F | 1.88 in | — | 7 |
| December | °F | °F | °F | 1.42 in | — | 9 |
Last spring / first fall frost
All-time recordsHottest, coldest, wettest
Planting calendarWhat to plant, and when