Ottumwa weather in July: Ottumwa, Iowa: normal highs, lows, rain and records for July
Ottumwa in July has a normal high of 86°F and a normal low of 65°F, a daily mean of 75°F, holding near 86°F all month. Measurable precipitation falls on 9 days in a normal July, 3.87 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 18°C, 98 mm of precipitation in July.
- NOAA stationOttumwa Industrial Airport
- Station IDUSW00014950
- Location41.11°N 92.45°W
- Elevation842 ft (257 m)
- From the center6 miles
- Population25,648
- Jan 32° 14°
- Feb 37° 18°
- Mar 50° 29°
- Apr 63° 39°
- May 73° 51°
- Jun 82° 61°
- Jul 86° 65°
- Aug 84° 62°
- Sep 77° 53°
- Oct 64° 42°
- Nov 50° 30°
- Dec 37° 20°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Ottumwa in July?
The normal high is 86°F and the normal low 65°F, for a daily mean of 75.1°F. July is 3.5°F warmer than June and 2.1°F warmer than August. July is the warmest month of the year in Ottumwa and the 4th wettest. Across the month the normal high rises 1°F, from 85°F on July 1 to 86°F on July 31. From one year to the next July's mean temperature typically moves about 2.8°F either way (NOAA's standard deviation), so roughly two Julys in three average between 72°F and 78°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 32%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 85°F | 64°F | 32% | 22% |
| July 8 | 86°F | 65°F | 31% | 22% |
| July 15 | 86°F | 65°F | 30% | 21% |
| July 22 | 86°F | 65°F | 30% | 21% |
| July 31 | 86°F | 64°F | 30% | 21% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 12, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 85°F | 64°F | 32% | 22% | 15 h 10 min |
| July 2 | 85°F | 64°F | 32% | 22% | 15 h 10 min |
| July 3 | 85°F | 64°F | 32% | 22% | 15 h |
| July 4 | 85°F | 64°F | 32% | 22% | 15 h |
| July 5 | 86°F | 64°F | 32% | 22% | 15 h |
| July 6 | 86°F | 64°F | 31% | 22% | 15 h |
| July 7 | 86°F | 64°F | 31% | 22% | 15 h |
| July 8 | 86°F | 65°F | 31% | 22% | 15 h |
| July 9 | 86°F | 65°F | 31% | 21% | 15 h |
| July 10 | 86°F | 65°F | 31% | 21% | 15 h |
| July 11 | 86°F | 65°F | 31% | 21% | 15 h |
| July 12 | 86°F | 65°F | 31% | 21% | 15 h |
| July 13 | 86°F | 65°F | 30% | 21% | 15 h |
| July 14 | 86°F | 65°F | 30% | 21% | 14 h 50 min |
| July 15 | 86°F | 65°F | 30% | 21% | 14 h 50 min |
| July 16 | 86°F | 65°F | 30% | 21% | 14 h 50 min |
| July 17 | 86°F | 65°F | 30% | 21% | 14 h 50 min |
| July 18 | 86°F | 65°F | 30% | 21% | 14 h 50 min |
| July 19 | 86°F | 65°F | 30% | 21% | 14 h 50 min |
| July 20 | 86°F | 65°F | 30% | 21% | 14 h 50 min |
| July 21 | 86°F | 65°F | 30% | 21% | 14 h 40 min |
| July 22 | 86°F | 65°F | 30% | 21% | 14 h 40 min |
| July 23 | 86°F | 65°F | 30% | 21% | 14 h 40 min |
| July 24 | 86°F | 65°F | 30% | 21% | 14 h 40 min |
| July 25 | 86°F | 65°F | 30% | 21% | 14 h 40 min |
| July 26 | 86°F | 65°F | 30% | 21% | 14 h 30 min |
| July 27 | 86°F | 65°F | 30% | 21% | 14 h 30 min |
| July 28 | 86°F | 64°F | 30% | 21% | 14 h 30 min |
| July 29 | 86°F | 64°F | 30% | 21% | 14 h 30 min |
| July 30 | 86°F | 64°F | 30% | 21% | 14 h 30 min |
| July 31 | 86°F | 64°F | 30% | 21% | 14 h 30 min |
- Normal high
- 86°FJuly average
- Normal low
- 65°FJuly average
- Precipitation
- 3.87 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 8
- Daylight
- 15 h 10 min to 14 h 30 minJuly 1 to July 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 25
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014950; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Ottumwa in July?
On a given July day the chance of 0.01 inch or more is 31% on average, highest around July 1 (32%). In all, 3.87 in falls on 9 days of a normal July, 1 of them with an inch or more.
In a normal July in Ottumwa, 8 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014950.
How humid and windy is Ottumwa in July?
At 3 p.m. the normal temperature is 83°F with 54% relative humidity and a dew point of 65°F; at 6 a.m. it is 66°F with 89% 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. | 66°F | 63°F | 89% | 6.4 mph | 67% |
| 9 a.m. | 75°F | 65°F | 72% | 8.0 mph | 71% |
| noon | 81°F | 65°F | 59% | 9.3 mph | 62% |
| 3 p.m. | 83°F | 65°F | 54% | 9.9 mph | 66% |
| 6 p.m. | 81°F | 66°F | 61% | 8.2 mph | 72% |
| 9 p.m. | 72°F | 65°F | 79% | 6.6 mph | 80% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014950. 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 Ottumwa?
The warmest July temperature on this station's record (since 1948) is 106°F, on July 23, 2012; the coldest is 48°F, on July 30, 1971. The wettest July brought 11.18 in (1992).
The July mean against the 1991-2020 normal of 75.1°F: 2021 74.3°F (−0.8), 2022 74.7°F (−0.4), 2023 72.9°F (−2.2), 2024 73.2°F (−1.9), 2025 76.0°F (+0.9), 2026 76.7°F (+1.6). 2 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 74.3°F | −0.8°F | 6.53 in |
| 2022 | 74.7°F | −0.4°F | 2.03 in |
| 2023 | 72.9°F | −2.2°F | 2.53 in |
| 2024 | 73.2°F | −1.9°F | 7.00 in |
| 2025 | 76.0°F | +0.9°F | 4.97 in |
| 2026 | 76.7°F | +1.6°F | 2.07 in |
Source: records: ACIS, station USW00014950; recent months: ACIS, station USW00014950. Records and recent months use complete months only.
How does July in Ottumwa 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; Ottumwa's is 86°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.