Waterloo weather in June: Waterloo, Iowa: normal highs, lows, rain and records for June
Waterloo in June has a normal high of 82°F and a normal low of 61°F, a daily mean of 72°F, rising from 79°F on the 1st to 85°F by the 30th. Measurable precipitation falls on 12 days in a normal June, 5.72 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 16°C, 145 mm of precipitation in June.
- NOAA stationWaterloo Municipal Airport
- Station IDUSW00094910
- Location42.55°N 92.40°W
- Elevation868 ft (265 m)
- Population67,477
- Jan 28° 11°
- Feb 33° 15°
- Mar 47° 27°
- Apr 61° 38°
- May 73° 50°
- Jun 82° 61°
- Jul 85° 64°
- Aug 83° 61°
- Sep 77° 52°
- Oct 63° 40°
- Nov 47° 28°
- Dec 34° 17°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Waterloo in June?
The normal high is 82°F and the normal low 61°F, for a daily mean of 71.5°F. June is 10.0°F warmer than May and 3.0°F cooler than July. June is the 3rd warmest month of the year in Waterloo and the wettest. Across the month the normal high rises 6°F, from 79°F on June 1 to 85°F on June 30. From one year to the next June's mean temperature typically moves about 1.8°F either way (NOAA's standard deviation), so roughly two Junes in three average between 70°F and 73°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 42%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| June 1 | 79°F | 57°F | 42% | 28% |
| June 8 | 81°F | 59°F | 41% | 28% |
| June 15 | 82°F | 61°F | 39% | 27% |
| June 22 | 84°F | 63°F | 37% | 26% |
| June 30 | 85°F | 64°F | 34% | 24% |
Every day of June: normal high, low and chance of precipitation (warmest afternoon June 30, coldest night June 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| June 1 | 79°F | 57°F | 42% | 28% | 15 h |
| June 2 | 79°F | 57°F | 42% | 28% | 15 h 10 min |
| June 3 | 79°F | 57°F | 41% | 28% | 15 h 10 min |
| June 4 | 80°F | 58°F | 41% | 28% | 15 h 10 min |
| June 5 | 80°F | 58°F | 41% | 28% | 15 h 10 min |
| June 6 | 80°F | 58°F | 41% | 28% | 15 h 10 min |
| June 7 | 80°F | 59°F | 41% | 28% | 15 h 10 min |
| June 8 | 81°F | 59°F | 41% | 28% | 15 h 10 min |
| June 9 | 81°F | 59°F | 40% | 28% | 15 h 10 min |
| June 10 | 81°F | 60°F | 40% | 28% | 15 h 10 min |
| June 11 | 81°F | 60°F | 40% | 27% | 15 h 10 min |
| June 12 | 82°F | 60°F | 40% | 27% | 15 h 20 min |
| June 13 | 82°F | 61°F | 40% | 27% | 15 h 20 min |
| June 14 | 82°F | 61°F | 40% | 27% | 15 h 20 min |
| June 15 | 82°F | 61°F | 39% | 27% | 15 h 20 min |
| June 16 | 83°F | 61°F | 39% | 27% | 15 h 20 min |
| June 17 | 83°F | 62°F | 39% | 27% | 15 h 20 min |
| June 18 | 83°F | 62°F | 39% | 27% | 15 h 20 min |
| June 19 | 83°F | 62°F | 38% | 27% | 15 h 20 min |
| June 20 | 83°F | 62°F | 38% | 26% | 15 h 20 min |
| June 21 | 84°F | 62°F | 38% | 26% | 15 h 20 min |
| June 22 | 84°F | 63°F | 37% | 26% | 15 h 20 min |
| June 23 | 84°F | 63°F | 37% | 26% | 15 h 20 min |
| June 24 | 84°F | 63°F | 37% | 25% | 15 h 20 min |
| June 25 | 84°F | 63°F | 36% | 25% | 15 h 20 min |
| June 26 | 84°F | 63°F | 36% | 25% | 15 h 20 min |
| June 27 | 84°F | 63°F | 35% | 25% | 15 h 20 min |
| June 28 | 85°F | 64°F | 35% | 24% | 15 h 20 min |
| June 29 | 85°F | 64°F | 35% | 24% | 15 h 20 min |
| June 30 | 85°F | 64°F | 34% | 24% | 15 h 20 min |
- Normal high
- 82°FJune average
- Normal low
- 61°FJune average
- Precipitation
- 5.72 inmonth total
- Days with precipitation
- 120.01 inch or more
- Days at 90°F or more
- 4
- Daylight
- 15 h to 15 h 20 minJune 1 to June 30
- Days at 70°F or more
- 28
- Days at 80°F or more
- 18
- Sunshine
- 76%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094910; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Waterloo in June?
On a given June day the chance of 0.01 inch or more is 39% on average, highest around June 1 (42%). In all, 5.72 in falls on 12 days of a normal June, 2 of them with an inch or more.
In a normal June in Waterloo, 4 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094910.
How humid and windy is Waterloo in June?
At 3 p.m. the normal temperature is 81°F with 54% relative humidity and a dew point of 63°F; at 6 a.m. it is 66°F with 86% humidity. The wind averages 8.1 mph, most often from the southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 66°F | 62°F | 86% | 5.9 mph | 65% |
| 9 a.m. | 74°F | 63°F | 68% | 9.6 mph | 72% |
| noon | 79°F | 63°F | 57% | 10.9 mph | 60% |
| 3 p.m. | 81°F | 63°F | 54% | 11.4 mph | 62% |
| 6 p.m. | 79°F | 63°F | 57% | 9.7 mph | 70% |
| 9 p.m. | 71°F | 64°F | 77% | 6.3 mph | 77% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00094910. 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 June in Waterloo?
The warmest June temperature on Waterloo's official record (since 1895) is 107°F, on June 28, 1934; the coldest is 33°F, on June 1, 1897. The wettest June brought 12.43 in (1947).
The June mean against the 1991-2020 normal of 71.5°F: 2021 75.5°F (+4.0), 2022 72.0°F (+0.5), 2023 72.5°F (+1.0), 2024 73.3°F (+1.8), 2025 72.8°F (+1.3), 2026 70.1°F (−1.4). 5 of 6 ran warmer than normal.
| June | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 75.5°F | +4.0°F | 0.87 in |
| 2022 | 72.0°F | +0.5°F | 6.00 in |
| 2023 | 72.5°F | +1.0°F | 2.20 in |
| 2024 | 73.3°F | +1.8°F | 7.24 in |
| 2025 | 72.8°F | +1.3°F | 6.54 in |
| 2026 | 70.1°F | −1.4°F | 5.91 in |
Source: records: ACIS, NWS threaded record ALOthr; recent months: ACIS, station USW00094910. Records and recent months use complete months only.
How does June in Waterloo compare across Iowa?
Across the 132 places PlainClimate covers in Iowa, June normal highs run from 76°F in Northwood to 84°F in Harlan; Waterloo's is 82°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.