Ontario, Oregon Weather
Monsoon storms drench the south. Day 14 of summer. Read this microseason across nine climate regions →
Ontario weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Clear——97°55°—
- SundayJul 5Overcast——99°66°+2°
- MondayJul 6Overcast——99°73°0°
- TuesdayJul 7Drizzle——101°66°+2°
- WednesdayJul 8Partly Cloudy——99°68°-2°
- ThursdayJul 9Clear——93°60°-6°
- FridayJul 10Clear——103°63°+10°
AQI 35 (Good), driven by Ozone. AQI up 24 in the last 6 hours — air quality is degrading. Ozone at AQI 61 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
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 61 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 61
- UV peak
- 8.4 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 61
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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:50 PM
- Moonset
- 10:55 AM
- In sign
- ♓︎ Pisces
Monsoon storms drench the south
Ontario at a glance
- Today vs. normal: 27°F above the seasonal normal for this latitude
- Last frost: May 10 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 97914
16-Day Forecast — Ontario
- Sat97°55°1%
- Sun99°66°1%
- Mon99°73°6%
- Tue101°66°6%
- Wed99°68°6%
- Thu93°60°0%
- Fri103°63°1%
- Sat109°71°1%
- Sun109°73°1%
- Mon114°81°4%
- Tue114°79°4%
- Wed111°79°4%
- Thu113°77°3%
- Fri115°79°6%
- Sat117°81°10%
- Sun120°82°6%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Ontario
SPC includes Ontario in the general thunderstorm area tomorrow — no severe risk, but storms are possible.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Ontario
- 97914