Ontario, Oregon Weather
Thunderheads build by noon. Day 89 of spring. Read this microseason across nine climate regions →
Ontario weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Overcast——92°60°—
- TuesdayJun 16Overcast——98°64°+6°
- WednesdayJun 17Clear——90°62°-8°
- ThursdayJun 18Overcast——90°55°0°
- FridayJun 19Overcast——100°63°+10°
- SaturdayJun 20Drizzle—0.03″82°69°-18°
- SundayJun 21Partly Cloudy——89°55°+7°
AQI 69 (Moderate), driven by Ozone. AQI up 23 in the last 6 hours — air quality is degrading. Ozone at AQI 48 now. With UV 0.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 12 around 1 PM.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 48 now. With UV 0.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 12 around 1 PM.
- Present
- AQI 48
- UV peak
- 0.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 12
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
Cut your thistles before St. John, you will have two instead of one.
- Moonrise
- 7:20 AM
- Moonset
- 10:58 PM
- In sign
- ♋︎ Cancer
Thunderheads build by noon
Ontario at a glance
- Today vs. normal: 7°F above the seasonal normal for this latitude
- Last frost: May 10 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Ontario
- Mon92°60°0%
- Tue98°65°0%
- Wed90°62°0%
- Thu90°55°0%
- Fri100°63°0%
- Sat82°69°3%
- Sun89°55°1%
- Mon91°58°0%
- Tue98°59°0%
- Wed91°65°0%
- Thu91°57°0%
- Fri94°60°1%
- Sat93°62°0%
- Sun99°63°0%
- Mon103°63°2%
- Tue96°66°6%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Warm-season window is open
As of June 16, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.
ZIP codes in Ontario
- 97914