Rosemont, California Weather
Bay laurel fragrance sweetens shade. Day 90 of spring. Read this microseason across nine climate regions →
Rosemont weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 17Overcast——88°59°—
- ThursdayJun 18Mostly Clear——82°58°-6°
- FridayJun 19Overcast——84°57°+2°
- SaturdayJun 20Overcast——89°59°+5°
- SundayJun 21Clear——95°58°+6°
- MondayJun 22Clear——96°59°+1°
- TuesdayJun 23Clear——98°62°+2°
AQI 55 (Moderate), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 80 — 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 80 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 80
- UV peak
- 4.7 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 80
PM × Wind × Precip
PM2.5 at 16.4 µg/m³, PM10 at 22.4 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.73
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 8:17 AM
- Moonset
- 10:42 PM
- In sign
- ♌︎ Leo
Bay laurel fragrance sweetens shade
Rosemont at a glance
- Today vs. normal: 12°F above the seasonal normal for this latitude
- Last frost: April 7 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Rosemont
- Wed88°59°0%
- Thu82°58°2%
- Fri84°57°2%
- Sat89°59°0%
- Sun95°58°0%
- Mon96°59°0%
- Tue98°62°0%
- Wed100°61°0%
- Thu103°64°2%
- Fri108°67°0%
- Sat112°73°0%
- Sun110°73°0%
- Mon107°70°0%
- Tue106°67°0%
- Wed106°67°0%
- Thu92°63°0%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 17, 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.
ZIP codes in Rosemont
- 95827
- 95826