Keystone, Indiana Weather
Sun climbs to its northern throne. Day 88 of spring. Read this microseason across nine climate regions →
Keystone weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Partly Cloudy——73°51°—
- TuesdayJun 16Rain51%0.17″78°54°+5°
- WednesdayJun 17T-storm w/ Hail93%1.6″76°53°-2°
- ThursdayJun 18Thunderstorm93%0.01″72°58°-4°
- FridayJun 19Drizzle——72°54°0°
- SaturdayJun 20Overcast10%—71°50°-1°
- SundayJun 21Showers45%0.64″75°59°+4°
AQI 30 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 45 — peak already passed at 1 PM under clear 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 45 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 45
- UV peak
- 5.3 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 45
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
- 6:10 AM
- Moonset
- 9:29 PM
- In sign
- ♋︎ Cancer
Sun climbs to its northern throne
Keystone at a glance
- Today vs. normal: 3°F below the seasonal normal for this latitude
- Last frost: April 20 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Keystone
- Mon73°51°0%
- Tue78°54°51%
- Wed76°53°93%
- Thu72°58°93%
- Fri72°54°7%
- Sat71°50°10%
- Sun75°59°45%
- Mon69°61°45%
- Tue65°62°25%
- Wed78°61°11%
- Thu77°61°12%
- Fri76°58°19%
- Sat76°56°35%
- Sun87°66°32%
- Mon75°65°46%
- Tue70°62°39%
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.
SPC Convective Outlook
Storm Prediction Center — Keystone
SPC has placed Keystone in the Enhanced Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWMRGLMarginal Risk
- DAY 3ENHEnhanced Risk
Numerous severe storms likely. Tornadoes, large hail, and damaging wind gusts possible across the area. Track NWS warnings if storms develop.
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 Keystone
- 46759