Cohasset, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Cohasset weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——87°69°—
- MondayJul 6Clear——88°68°+1°
- TuesdayJul 7Clear——92°59°+4°
- WednesdayJul 8Clear——95°61°+3°
- ThursdayJul 9Clear——97°65°+2°
- FridayJul 10Overcast——100°67°+3°
- SaturdayJul 11Overcast——101°70°+1°
AQI 34 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 50. Overcast through the UV peak window (cloud cover ~71%) — afternoon ozone should stay flat.
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 50. Overcast through the UV peak window (cloud cover ~71%) — afternoon ozone should stay flat.
- Present
- AQI 50
- UV peak
- 7.4 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 25
PM × Wind × Precip
PM2.5 at 6.9 µg/m³ (AQI 38), ratio 0.64 with 7 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.64
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:27 PM
- Moonset
- 11:25 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Cohasset at a glance
- Today vs. normal: 11°F above the seasonal normal for this latitude
- Last frost: April 15 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — Cohasset
- Sun87°69°0%
- Mon88°68°1%
- Tue92°59°0%
- Wed95°61°0%
- Thu97°65°0%
- Fri100°67°0%
- Sat101°70°1%
- Sun88°63°1%
- Mon96°62°2%
- Tue103°69°3%
- Wed102°69°2%
- Thu103°69°2%
- Fri104°73°6%
- Sat103°73°6%
- Sun99°69°6%
- Mon98°64°5%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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 Cohasset
- 95973