Ontario weather in June: Ontario, California: normal highs, lows, rain and records for June
Ontario in June has a normal high of 86°F and a normal low of 60°F, a daily mean of 73°F, rising from 82°F on the 1st to 91°F by the 30th. Measurable precipitation falls on 0 days in a normal June, 0.02 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 16°C, 1 mm of precipitation in June.
- NOAA stationOntario International Airport
- Station IDUSW00003102
- Location34.06°N 117.60°W
- Elevation949 ft (289 m)
- From the center1 miles
- Population185,285
- Jan 68° 45°
- Feb 68° 46°
- Mar 72° 49°
- Apr 76° 51°
- May 80° 56°
- Jun 86° 60°
- Jul 94° 65°
- Aug 95° 65°
- Sep 91° 64°
- Oct 83° 57°
- Nov 75° 49°
- Dec 67° 44°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Ontario in June?
The normal high is 86°F and the normal low 60°F, for a daily mean of 73.2°F. June is 5.5°F warmer than May and 6.0°F cooler than July. June is the 4th warmest month of the year in Ontario and the 12th wettest. Across the month the normal high rises 9°F, from 82°F on June 1 to 91°F on June 30. From one year to the next June's mean temperature typically moves about 2.6°F either way (NOAA's standard deviation), so roughly two Junes in three average between 71°F and 76°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 3%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| June 1 | 82°F | 58°F | 3% | 1% |
| June 8 | 84°F | 59°F | 2% | 1% |
| June 15 | 86°F | 60°F | 1% | 0% |
| June 22 | 89°F | 61°F | 1% | 0% |
| June 30 | 91°F | 63°F | 1% | 0% |
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 | 82°F | 58°F | 3% | 1% | 14 h 20 min |
| June 2 | 82°F | 58°F | 3% | 1% | 14 h 20 min |
| June 3 | 83°F | 58°F | 3% | 1% | 14 h 20 min |
| June 4 | 83°F | 58°F | 2% | 1% | 14 h 20 min |
| June 5 | 83°F | 58°F | 2% | 1% | 14 h 20 min |
| June 6 | 83°F | 58°F | 2% | 1% | 14 h 20 min |
| June 7 | 84°F | 58°F | 2% | 1% | 14 h 20 min |
| June 8 | 84°F | 59°F | 2% | 1% | 14 h 20 min |
| June 9 | 84°F | 59°F | 2% | 1% | 14 h 20 min |
| June 10 | 85°F | 59°F | 2% | 1% | 14 h 20 min |
| June 11 | 85°F | 59°F | 2% | 1% | 14 h 20 min |
| June 12 | 85°F | 59°F | 1% | 0% | 14 h 20 min |
| June 13 | 85°F | 59°F | 1% | 0% | 14 h 20 min |
| June 14 | 86°F | 60°F | 1% | 0% | 14 h 20 min |
| June 15 | 86°F | 60°F | 1% | 0% | 14 h 20 min |
| June 16 | 86°F | 60°F | 1% | 0% | 14 h 20 min |
| June 17 | 87°F | 60°F | 1% | 0% | 14 h 30 min |
| June 18 | 87°F | 60°F | 1% | 0% | 14 h 30 min |
| June 19 | 88°F | 61°F | 1% | 0% | 14 h 30 min |
| June 20 | 88°F | 61°F | 1% | 0% | 14 h 30 min |
| June 21 | 88°F | 61°F | 1% | 0% | 14 h 30 min |
| June 22 | 89°F | 61°F | 1% | 0% | 14 h 30 min |
| June 23 | 89°F | 62°F | 1% | 0% | 14 h 30 min |
| June 24 | 89°F | 62°F | 1% | 0% | 14 h 30 min |
| June 25 | 90°F | 62°F | 1% | 0% | 14 h 30 min |
| June 26 | 90°F | 62°F | 1% | 0% | 14 h 30 min |
| June 27 | 90°F | 62°F | 1% | 0% | 14 h 30 min |
| June 28 | 91°F | 63°F | 1% | 0% | 14 h 20 min |
| June 29 | 91°F | 63°F | 1% | 0% | 14 h 20 min |
| June 30 | 91°F | 63°F | 1% | 0% | 14 h 20 min |
- Normal high
- 86°FJune average
- Normal low
- 60°FJune average
- Precipitation
- 0.02 inmonth total
- Days with precipitation
- fewer than 10.01 inch or more
- Days at 90°F or more
- 11
- Daylight
- 14 h 20 min to 14 h 20 minJune 1 to June 30
- Days at 70°F or more
- 29
- Days at 80°F or more
- 24
- Sunshine
- 96%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00003102; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Ontario in June?
On a given June day the chance of 0.01 inch or more is 1% on average, highest around June 1 (3%). In all, 0.02 in falls on 0 days of a normal June.
In a normal June in Ontario, 11 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00003102.
What are the records for June in Ontario?
The warmest June temperature on this station's record (since 1998) is 112°F, on June 20, 2016; the coldest is 46°F, on June 5, 1999. The wettest June brought 0.25 in (1999).
The June mean against the 1991-2020 normal of 73.2°F: 2021 77.7°F (+4.5), 2022 77.3°F (+4.0), 2023 67.3°F (−5.9), 2024 74.1°F (+0.9), 2025 74.3°F (+1.1), 2026 73.5°F (+0.3). 5 of 6 ran warmer than normal.
| June | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 77.7°F | +4.5°F | 0.00 in |
| 2022 | 77.3°F | +4.0°F | 0.00 in |
| 2023 | 67.3°F | −5.9°F | 0.00 in |
| 2024 | 74.1°F | +0.9°F | 0.00 in |
| 2025 | 74.3°F | +1.1°F | 0.10 in |
| 2026 | 73.5°F | +0.3°F | 0.00 in |
Source: records: ACIS, station USW00003102; recent months: ACIS, station USW00003102. Records and recent months use complete months only.
How does June in Ontario compare across California?
Across the 219 places PlainClimate covers in California, June normal highs run from 61°F in Bodega to 106°F in Needles; Ontario's is 86°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.