Monmouth, California Weather
Bay laurel fragrance sweetens shade. Day 90 of spring. Read this microseason across nine climate regions →
Monmouth weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 17Clear——99°67°—
- ThursdayJun 18Clear——97°66°-2°
- FridayJun 19Clear——97°63°0°
- SaturdayJun 20Clear——94°56°-3°
- SundayJun 21Clear——98°59°+4°
- MondayJun 22Clear——103°63°+5°
- TuesdayJun 23Clear——105°65°+2°
AQI 53 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 18.3 µg/m³ (AQI 68), ratio 0.47 with 5 mph wind — characteristic of long-range haze transport rather than a local source.
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 66 now. With UV 10 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 90 around 1 PM.
- Present
- AQI 66
- UV peak
- 10.2 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 90
PM × Wind × Precip
PM2.5 at 18.3 µg/m³ (AQI 68), ratio 0.47 with 5 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.47
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- transport
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
- 8:16 AM
- Moonset
- 10:28 PM
- In sign
- ♌︎ Leo
Bay laurel fragrance sweetens shade
Monmouth at a glance
- Today vs. normal: 18°F above the seasonal normal for this latitude
- Last frost: March 26 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Monmouth
- Wed99°67°1%
- Thu97°66°1%
- Fri97°63°0%
- Sat94°56°0%
- Sun98°59°0%
- Mon103°63°0%
- Tue105°65°0%
- Wed106°66°1%
- Thu108°68°1%
- Fri110°67°0%
- Sat113°73°0%
- Sun115°75°0%
- Mon112°72°0%
- Tue113°69°0%
- Wed112°69°3%
- Thu110°69°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 Monmouth
- 93725