Cos Cob, Connecticut Weather
Solstice approaches — longest light. Day 88 of spring. Read this microseason across nine climate regions →
Cos Cob weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Rain83%0.26″76°61°—
- TuesdayJun 16Overcast——78°55°+2°
- WednesdayJun 17Overcast20%0.01″75°61°-3°
- ThursdayJun 18Light Drizzle39%—91°65°+16°
- FridayJun 19Overcast14%—79°66°-12°
- SaturdayJun 20Overcast——78°61°-1°
- SundayJun 21Overcast——79°59°+1°
AQI 33 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 35 — peak already passed at 1 PM under partly cloudy 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 35 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.
- Present
- AQI 35
- UV peak
- 2.0 at earlier today
- Sky at peak
- partly cloudy
- Projected peak
- AQI 35
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
- 5:20 AM
- Moonset
- 8:43 PM
- In sign
- ♋︎ Cancer
Solstice approaches — longest light
Cos Cob at a glance
- Today vs. normal: 74°F — typical for the season
- Last frost: April 22 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Cos Cob
- Mon76°61°83%
- Tue78°55°0%
- Wed75°61°20%
- Thu91°65°39%
- Fri79°66°14%
- Sat78°61°7%
- Sun79°59°9%
- Mon65°59°35%
- Tue75°56°35%
- Wed75°52°14%
- Thu76°60°14%
- Fri67°64°32%
- Sat85°63°39%
- Sun84°59°40%
- Mon91°70°20%
- Tue87°71°24%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 15, 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 Cos Cob
- 06807