Algonquin, Maryland Weather
Honeysuckle sweetens the night. Day 91 of spring. Read this microseason across nine climate regions →
Algonquin weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 18Heavy Rain24%0.48″98°72°—
- FridayJun 19Light Rain50%0.24″77°65°-21°
- SaturdayJun 20Overcast——83°63°+6°
- SundayJun 21Overcast14%—86°64°+3°
- MondayJun 22Heavy Showers65%0.40″78°65°-8°
- TuesdayJun 23Overcast50%—80°60°+2°
- WednesdayJun 24Overcast——85°62°+5°
AQI 63 (Moderate), driven by Ozone. AQI down 21 over the last 6 hours — air quality is improving sharply. Ozone at AQI 40. Overcast through the UV peak window (cloud cover ~100%) — 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 40. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 40
- UV peak
- 3.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 9
PM × Wind × Precip
PM2.5 at 7.0 µg/m³, PM10 at 7.3 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.96
- 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).
Cut your thistles before St. John, you will have two instead of one.
- Moonrise
- 9:22 AM
- Moonset
- 11:15 PM
- In sign
- ♌︎ Leo
Honeysuckle sweetens the night
Algonquin at a glance
- Today vs. normal: 4°F below the seasonal normal for this latitude
- Last frost: April 8 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
15-Day Forecast — Algonquin
- Thu98°72°24%
- Fri77°65°50%
- Sat83°63°0%
- Sun86°64°14%
- Mon78°65°65%
- Tue80°60°50%
- Wed85°62°4%
- Thu84°67°17%
- Fri85°64°22%
- Sat78°66°22%
- Sun90°65°20%
- Mon89°68°46%
- Tue90°70°41%
- Wed96°72°38%
- Thu88°71°47%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 18, 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 — Algonquin
SPC has placed Algonquin in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWNONENo severe risk
- DAY 3NONENo severe risk
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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 Algonquin
- 21613