Mason City weather in July: Mason City, Iowa: normal highs, lows, rain and records for July
Mason City in July has a normal high of 83°F and a normal low of 61°F, a daily mean of 72°F, holding near 83°F all month. Measurable precipitation falls on 10 days in a normal July, 4.43 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 16°C, 113 mm of precipitation in July.
- 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 July?
The normal high is 83°F and the normal low 61°F, for a daily mean of 71.5°F. July is 3.0°F warmer than June and 2.6°F warmer than August. July is the warmest month of the year in Mason City and the 3rd wettest. Across the month the normal high falls 1°F, from 83°F on July 1 to 82°F on July 31. From one year to the next July's mean temperature typically moves about 2.7°F either way (NOAA's standard deviation), so roughly two Julys in three average between 69°F and 74°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 35%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 83°F | 60°F | 35% | 24% |
| July 8 | 83°F | 61°F | 33% | 22% |
| July 15 | 83°F | 61°F | 32% | 21% |
| July 22 | 82°F | 61°F | 31% | 20% |
| July 31 | 82°F | 60°F | 31% | 20% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 6, coldest night July 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 83°F | 60°F | 35% | 24% | 15 h 20 min |
| July 2 | 83°F | 60°F | 35% | 24% | 15 h 20 min |
| July 3 | 83°F | 60°F | 34% | 23% | 15 h 20 min |
| July 4 | 83°F | 61°F | 34% | 23% | 15 h 20 min |
| July 5 | 83°F | 61°F | 34% | 23% | 15 h 20 min |
| July 6 | 83°F | 61°F | 34% | 23% | 15 h 20 min |
| July 7 | 83°F | 61°F | 34% | 23% | 15 h 20 min |
| July 8 | 83°F | 61°F | 33% | 22% | 15 h 10 min |
| July 9 | 83°F | 61°F | 33% | 22% | 15 h 10 min |
| July 10 | 83°F | 61°F | 33% | 22% | 15 h 10 min |
| July 11 | 83°F | 61°F | 33% | 22% | 15 h 10 min |
| July 12 | 83°F | 61°F | 32% | 22% | 15 h 10 min |
| July 13 | 83°F | 61°F | 32% | 22% | 15 h 10 min |
| July 14 | 83°F | 61°F | 32% | 21% | 15 h 10 min |
| July 15 | 83°F | 61°F | 32% | 21% | 15 h 10 min |
| July 16 | 83°F | 61°F | 32% | 21% | 15 h |
| July 17 | 83°F | 61°F | 32% | 21% | 15 h |
| July 18 | 83°F | 61°F | 32% | 21% | 15 h |
| July 19 | 83°F | 61°F | 31% | 21% | 15 h |
| July 20 | 83°F | 61°F | 31% | 21% | 15 h |
| July 21 | 82°F | 61°F | 31% | 21% | 15 h |
| July 22 | 82°F | 61°F | 31% | 20% | 14 h 50 min |
| July 23 | 82°F | 61°F | 31% | 20% | 14 h 50 min |
| July 24 | 82°F | 60°F | 31% | 20% | 14 h 50 min |
| July 25 | 82°F | 60°F | 31% | 20% | 14 h 50 min |
| July 26 | 82°F | 60°F | 31% | 20% | 14 h 50 min |
| July 27 | 82°F | 60°F | 31% | 20% | 14 h 40 min |
| July 28 | 82°F | 60°F | 31% | 20% | 14 h 40 min |
| July 29 | 82°F | 60°F | 31% | 20% | 14 h 40 min |
| July 30 | 82°F | 60°F | 31% | 20% | 14 h 40 min |
| July 31 | 82°F | 60°F | 31% | 20% | 14 h 40 min |
- Normal high
- 83°FJuly average
- Normal low
- 61°FJuly average
- Precipitation
- 4.43 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 4
- Daylight
- 15 h 20 min to 14 h 40 minJuly 1 to July 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 22
- Sunshine
- 82%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 in Mason City in July?
On a given July day the chance of 0.01 inch or more is 32% on average, highest around July 1 (35%). In all, 4.43 in falls on 10 days of a normal July, 1 of them with an inch or more.
In a normal July in Mason City, 4 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014940.
How humid and windy is Mason City in July?
At 3 p.m. the normal temperature is 80°F with 57% relative humidity and a dew point of 63°F; at 6 a.m. it is 63°F with 92% humidity. The wind averages 7.7 mph, most often from the southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 63°F | 61°F | 92% | 5.7 mph | 63% |
| 9 a.m. | 73°F | 63°F | 73% | 9.1 mph | 64% |
| noon | 78°F | 63°F | 60% | 10.3 mph | 52% |
| 3 p.m. | 80°F | 63°F | 57% | 10.7 mph | 54% |
| 6 p.m. | 77°F | 64°F | 63% | 8.6 mph | 69% |
| 9 p.m. | 68°F | 64°F | 87% | 5.7 mph | 72% |
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 July in Mason City?
The warmest July temperature on this station's record (since 1948) is 104°F, on July 7, 1980; the coldest is 42°F, on July 5, 1967. The wettest July brought 12.20 in (1990).
The July mean against the 1991-2020 normal of 71.5°F: 2021 71.5°F (at normal), 2022 72.2°F (+0.7), 2023 69.7°F (−1.8), 2024 70.7°F (−0.8), 2025 72.8°F (+1.3), 2026 73.8°F (+2.3). 3 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 71.5°F | at normal | 3.35 in |
| 2022 | 72.2°F | +0.7°F | 1.77 in |
| 2023 | 69.7°F | −1.8°F | 1.85 in |
| 2024 | 70.7°F | −0.8°F | 5.17 in |
| 2025 | 72.8°F | +1.3°F | 7.96 in |
| 2026 | 73.8°F | +2.3°F | 7.53 in |
Source: records: ACIS, station USW00014940; recent months: ACIS, station USW00014940. Records and recent months use complete months only.
How does July in Mason City compare across Iowa?
Across the 132 places PlainClimate covers in Iowa, July normal highs run from 79°F in Northwood to 87°F in Glenwood; Mason City's is 83°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.