Johnson, Indiana Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Johnson weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast22%—92°71°—
- SundayJul 5Overcast21%—86°73°-6°
- MondayJul 6Overcast21%—86°71°0°
- TuesdayJul 7Overcast10%—83°68°-3°
- WednesdayJul 8Clear——86°66°+3°
- ThursdayJul 9Thunderstorm34%—88°70°+2°
- FridayJul 10Thunderstorm45%0.02″84°73°-4°
AQI 47 (Good), driven by Ozone. AQI down 5 over the last 6 hours (gradual decline). Ozone at AQI 51. Overcast through the UV peak window (cloud cover ~68%) — afternoon ozone should stay flat.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 51. Overcast through the UV peak window (cloud cover ~68%) — afternoon ozone should stay flat.
- Present
- AQI 51
- UV peak
- 4.6 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 16
PM × Wind × Precip
PM2.5 at 8.1 µg/m³ (AQI 45) with a 0.93 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.93
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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
- 10:43 PM
- Moonset
- 9:59 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Johnson at a glance
- Today vs. normal: 11°F above the seasonal normal for this latitude
- Last frost: April 6 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — Johnson
- Sat92°71°22%
- Sun86°73°21%
- Mon86°71°21%
- Tue83°68°10%
- Wed86°66°8%
- Thu88°70°34%
- Fri84°73°45%
- Sat86°73°34%
- Sun76°63°17%
- Mon73°57°8%
- Tue78°61°12%
- Wed82°64°10%
- Thu82°66°19%
- Fri77°70°23%
- Sat85°70°26%
- Sun87°72°35%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 4, 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 — Johnson
SPC has placed Johnson in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
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 Johnson
- 47665