Mason City weather in October: Mason City, Iowa: normal highs, lows, rain and records for October
Mason City in October has a normal high of 60°F and a normal low of 37°F, a daily mean of 48°F, falling from 68°F on the 1st to 52°F by the 31st. Measurable precipitation falls on 9 days in a normal October, 2.53 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 16°C and low of 3°C, 64 mm of precipitation and 1 cm of snow in October.
- NOAA stationMason City Municipal Airport
- Station IDUSW00014940
- Location43.15°N 93.33°W
- Elevation1,225 ft (373 m)
- From the center6 miles
- Population26,948
- Jan 24° 7°
- Feb 29° 11°
- Mar 42° 24°
- Apr 58° 35°
- May 70° 47°
- Jun 80° 57°
- Jul 83° 61°
- Aug 80° 58°
- Sep 74° 49°
- Oct 60° 37°
- Nov 44° 24°
- Dec 30° 14°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Mason City in October?
The normal high is 60°F and the normal low 37°F, for a daily mean of 48.2°F. October is 13.2°F cooler than September and 14.3°F warmer than November. October is the 6th warmest month of the year in Mason City and the 7th wettest. Across the month the normal high falls 16°F, from 68°F on October 1 to 52°F on October 31. From one year to the next October's mean temperature typically moves about 2.9°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 45°F and 51°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 30%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 68°F | 43°F | 30% | 17% |
| October 8 | 64°F | 40°F | 29% | 16% |
| October 15 | 61°F | 37°F | 28% | 15% |
| October 22 | 57°F | 34°F | 27% | 14% |
| October 31 | 52°F | 31°F | 26% | 13% |
Every day of October: normal high, low and chance of precipitation (warmest afternoon October 1, coldest night October 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| October 1 | 68°F | 43°F | 30% | 17% | 11 h 50 min |
| October 2 | 67°F | 42°F | 30% | 17% | 11 h 40 min |
| October 3 | 67°F | 42°F | 30% | 17% | 11 h 40 min |
| October 4 | 66°F | 41°F | 30% | 17% | 11 h 40 min |
| October 5 | 66°F | 41°F | 29% | 17% | 11 h 40 min |
| October 6 | 65°F | 41°F | 29% | 17% | 11 h 30 min |
| October 7 | 65°F | 40°F | 29% | 16% | 11 h 30 min |
| October 8 | 64°F | 40°F | 29% | 16% | 11 h 30 min |
| October 9 | 64°F | 39°F | 29% | 16% | 11 h 20 min |
| October 10 | 63°F | 39°F | 29% | 16% | 11 h 20 min |
| October 11 | 63°F | 39°F | 29% | 16% | 11 h 20 min |
| October 12 | 62°F | 38°F | 29% | 15% | 11 h 20 min |
| October 13 | 62°F | 38°F | 29% | 15% | 11 h 10 min |
| October 14 | 61°F | 37°F | 28% | 15% | 11 h 10 min |
| October 15 | 61°F | 37°F | 28% | 15% | 11 h 10 min |
| October 16 | 60°F | 37°F | 28% | 15% | 11 h |
| October 17 | 59°F | 36°F | 28% | 14% | 11 h |
| October 18 | 59°F | 36°F | 28% | 14% | 11 h |
| October 19 | 58°F | 35°F | 27% | 14% | 11 h |
| October 20 | 58°F | 35°F | 27% | 14% | 10 h 50 min |
| October 21 | 57°F | 35°F | 27% | 14% | 10 h 50 min |
| October 22 | 57°F | 34°F | 27% | 14% | 10 h 50 min |
| October 23 | 56°F | 34°F | 27% | 14% | 10 h 40 min |
| October 24 | 56°F | 33°F | 27% | 14% | 10 h 40 min |
| October 25 | 55°F | 33°F | 27% | 14% | 10 h 40 min |
| October 26 | 55°F | 33°F | 27% | 14% | 10 h 40 min |
| October 27 | 54°F | 32°F | 27% | 13% | 10 h 30 min |
| October 28 | 53°F | 32°F | 26% | 13% | 10 h 30 min |
| October 29 | 53°F | 31°F | 26% | 13% | 10 h 30 min |
| October 30 | 52°F | 31°F | 26% | 13% | 10 h 30 min |
| October 31 | 52°F | 31°F | 26% | 13% | 10 h 20 min |
- Normal high
- 60°FOctober average
- Normal low
- 37°FOctober average
- Precipitation
- 2.53 inmonth total
- Days with precipitation
- 90.01 inch or more
- Snowfall
- 0.4 inmonth total
- Nights at 32°F or colder
- 11
- Daylight
- 11 h 50 min to 10 h 20 minOctober 1 to October 31
- Days at 70°F or more
- 7
- Days at 80°F or more
- 2
- Sunshine
- 70%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014940; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Mason City in October?
On a given October day the chance of 0.01 inch or more is 28% on average, highest around October 1 (30%). In all, 2.53 in falls on 9 days of a normal October, 1 of them with an inch or more.
In a normal October in Mason City, 11 nights fall to freezing and snowfall averages 0.4 inches.
Snow falls on 1 day in a normal October.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014940.
How humid and windy is Mason City in October?
At 3 p.m. the normal temperature is 50°F with 53% relative humidity and a dew point of 33°F; at 6 a.m. it is 35°F with 84% humidity. The wind averages 11.5 mph, most often from the west in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 35°F | 31°F | 84% | 9.9 mph | 55% |
| 9 a.m. | 40°F | 33°F | 76% | 12.4 mph | 50% |
| noon | 48°F | 34°F | 58% | 14.3 mph | 49% |
| 3 p.m. | 50°F | 33°F | 53% | 14.5 mph | 52% |
| 6 p.m. | 43°F | 33°F | 68% | 10.2 mph | 54% |
| 9 p.m. | 39°F | 32°F | 76% | 10.3 mph | 59% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014940. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for October in Mason City?
The warmest October temperature on this station's record (since 1948) is 95°F, on October 5, 1963; the coldest is 12°F, on October 28, 1967. The wettest October brought 6.71 in (2009); the snowiest, 7.0 inches (1976).
The October mean against the 1991-2020 normal of 48.2°F: 2021 53.3°F (+5.1), 2022 47.9°F (−0.3), 2023 50.6°F (+2.4), 2024 54.8°F (+6.6), 2025 53.7°F (+5.5). 4 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 53.3°F | +5.1°F | 2.55 in |
| 2022 | 47.9°F | −0.3°F | 0.42 in |
| 2023 | 50.6°F | +2.4°F | 3.40 in |
| 2024 | 54.8°F | +6.6°F | 1.10 in |
| 2025 | 53.7°F | +5.5°F | 1.77 in |
Source: records: ACIS, station USW00014940; recent months: ACIS, station USW00014940. Records and recent months use complete months only.
How does October in Mason City compare across Iowa?
Across the 132 places PlainClimate covers in Iowa, October normal highs run from 57°F in Northwood to 67°F in Glenwood; Mason City's is 60°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.