Mason City in December
4.2out of 10
Not the best time
Cold: highs around -1°C. Some rain: about 7 rainy days.
-1°CAvg high
-9°CAvg low
7Rainy days (37 mm)
8:49 hDaylight
07:44Sunrise · 16:34 Sunset
Why this score
- Cold: highs around -1°C
- Some rain: about 7 rainy days
- Nights fall to about -9°C
What to wear and pack
- Winter coat, hat and scarf
- Gloves for freezing mornings
How reliable is the forecast?
Rainfall in December is fairly consistent from year to year (3.0 days). Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | -4°C | -12°C | 29 mm | 7 | – | – | 4.2 |
| February | -1°C | -10°C | 32 mm | 6 | – | – | 4.3 |
| March | 6°C | -3°C | 61 mm | 8 | – | – | 5.1 |
| April | 15°C | 3°C | 101 mm | 11 | – | – | 6.3 |
| May | 21°C | 10°C | 130 mm | 14 | – | – | 6.9 |
| June | 26°C | 16°C | 137 mm | 12 | – | – | 7.2 |
| July | 27°C | 18°C | 102 mm | 10 | – | – | 7.7 |
| August | 26°C | 16°C | 100 mm | 10 | – | – | 7.6 |
| September | 23°C | 12°C | 90 mm | 9 | – | – | 7.9 |
| October | 16°C | 5°C | 68 mm | 8 | – | – | 7.0 |
| November | 7°C | -2°C | 49 mm | 7 | – | – | 5.4 |
| December | -1°C | -9°C | 37 mm | 7 | – | – | 4.2 |
Frequently asked questions
How hot is Mason City in December?
Daytime highs average -1°C and nights about -9°C.
When is the best time to visit Mason City?
The best months are September, July, August.