Johnstown, New York Weather
Honeysuckle sweetens the night. Day 91 of spring. Read this microseason across nine climate regions →
Johnstown weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 18Heavy Rain71%0.87″78°62°—
- FridayJun 19Overcast——71°58°-7°
- SaturdayJun 20Overcast——71°56°0°
- SundayJun 21Overcast——72°48°+1°
- MondayJun 22Overcast43%—63°52°-9°
- TuesdayJun 23Partly Cloudy23%—78°50°+15°
- WednesdayJun 24Overcast15%—79°53°+1°
AQI 39 (Good), driven by PM2.5. AQI down 7 over the last 6 hours (gradual decline). PM scrubbed by 4 hours of recent rain — PM2.5 down to 10.8 µg/m³, PM10 to 11.6 µg/m³.
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 37. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 37
- UV peak
- 3.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 8
PM × Wind × Precip
PM scrubbed by 4 hours of recent rain — PM2.5 down to 10.8 µg/m³, PM10 to 11.6 µg/m³.
- PM2.5/PM10
- 0.93
- Wind
- light
- Recent rain
- 4h in last 6h
- Pattern
- washed out
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
- 9:02 AM
- Moonset
- 11:21 PM
- In sign
- ♌︎ Leo
Honeysuckle sweetens the night
Johnstown at a glance
- Today vs. normal: 9°F below the seasonal normal for this latitude
- Last frost: May 4 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
15-Day Forecast — Johnstown
- Thu79°62°71%
- Fri71°58°5%
- Sat71°56°4%
- Sun72°48°8%
- Mon63°52°43%
- Tue78°50°23%
- Wed79°53°15%
- Thu68°56°41%
- Fri70°51°55%
- Sat79°54°31%
- Sun69°62°31%
- Mon78°57°37%
- Tue80°56°52%
- Wed70°59°36%
- Thu77°57°43%
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 — Johnstown
SPC has placed Johnstown 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 Johnstown
- 12095