Blue Island, Illinois Weather
Honeysuckle sweetens the night. Day 89 of spring. Read this microseason across nine climate regions →
Blue Island weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 16Thunderstorm49%0.01″76°60°—
- WednesdayJun 17Heavy Rain99%8.4″66°55°-10°
- ThursdayJun 18Light Drizzle58%0.01″70°57°+4°
- FridayJun 19Overcast——75°58°+5°
- SaturdayJun 20Light Drizzle13%0.01″77°59°+2°
- SundayJun 21Drizzle51%0.17″64°57°-13°
- MondayJun 22Overcast51%—70°57°+6°
AQI 28 (Good), driven by Ozone. AQI down 9 over the last 6 hours (gradual decline).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 6 PM.
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
- 6:27 AM
- Moonset
- 9:45 PM
- In sign
- ♋︎ Cancer
Honeysuckle sweetens the night
Blue Island at a glance
- Today vs. normal: 9°F below the seasonal normal for this latitude
- Last frost: April 26 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Blue Island
- Tue76°60°49%
- Wed66°55°99%
- Thu70°57°58%
- Fri75°58°2%
- Sat77°59°13%
- Sun64°57°51%
- Mon70°57°51%
- Tue78°59°10%
- Wed81°64°13%
- Thu84°66°17%
- Fri84°70°23%
- Sat92°71°31%
- Sun93°75°31%
- Mon94°78°39%
- Tue95°78°39%
- Wed96°77°42%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 16, 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 — Blue Island
SPC has placed Blue Island in the Enhanced Risk category for severe thunderstorms tomorrow.
- TODAYMRGLMarginal Risk
- TOMORROWENHEnhanced Risk
- DAY 3NONENo severe 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.
Microseason · June 16–20
Honeysuckle sweetens the night
Japanese honeysuckle perfumes parks after dark.
Day 167 of 365 · Wedge 34 of 72
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
Blue Island peaks at about 76°F in July and bottoms near 24°F in January; May brings the heaviest rain (4.2 inches) and January the least (2.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 24° | 2.0″ | 16 |
| February | 27° | 2.1″ | 14 |
| March | 37° | 3.0″ | 16 |
| April | 50° | 3.8″ | 17 |
| May | 59° | 4.2″ | 18 |
| June | 70° | 4.0″ | 17 |
| July | 76° | 2.9″ | 15 |
| August | 75° | 3.0″ | 14 |
| September | 68° | 3.1″ | 14 |
| October | 55° | 3.0″ | 13 |
| November | 40° | 3.2″ | 16 |
| December | 28° | 2.5″ | 15 |
Regional context
Drawing on NOAA NCEI 1991-2020 normals, Blue Island's January averages 24°F and July 76°F — 53°F apart — while precipitation totals roughly 36.8 inches over some 184 days.
Rainfall in Blue Island stays even across the calendar: May tops out at 4.2 inches over 18.2 rainy days, and January still logs 2.0 inches across 15.7 — a narrow range for Blue Island. That lines Blue Island up with places like Calumet Park, IL, Robbins, IL and Dixmoor, IL, fed by overlapping storm tracks.
The cool-season window in Blue Island starts at mid-April, when nights stop freezing — think kale, peas, spinach, and parsnips. Warm-soil crops in Blue Island wait about two weeks past Blue Island's last frost, once the soil warms. Blue Island's window closes around mid-November as overnight lows return below freezing. Within Blue Island, cold-air pooling chills low spots by 5-10°F, shifting Blue Island's local frost dates.
Similar climates: Calumet Park, IL, Robbins, IL, Dixmoor, IL, Merrionette Park, IL, Posen, IL.
Frequently asked
- When does it freeze in Blue Island?
- In Blue Island, expect the last spring frost near mid-April; Blue Island's first autumn frost comes around mid-November.
- What is the rainy season in Blue Island?
- Blue Island sees its heaviest rain in May (around 4.2 inches), part of roughly 37 inches a year.
- What is the warmest month in Blue Island?
- July is Blue Island's warmest month, averaging about 76°F.
- What is the coldest month in Blue Island?
- Blue Island bottoms out in January, with a mean near 24°F.
- When can I start a vegetable garden in Blue Island?
- Blue Island's last frost (mid-April) cues hardy greens; in Blue Island, hold heat-lovers two weeks past.
- How many rainy days does Blue Island get?
- Blue Island averages about 184 days with measurable rain or snow each year.
- What hardiness zone is Blue Island?
- Blue Island's USDA zone comes from its January mean (24°F); enter the ZIP on the USDA lookup for the number.
- What is the 10-day forecast for Blue Island?
- Blue Island's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Blue Island?
- See this week's day-by-day rain chances for Blue Island in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Blue Island?
- Current conditions for Blue Island and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Blue Island forecast updated?
- The Blue Island forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Blue Island?
- Day length in Blue Island peaks around the June solstice — earliest sunrise and latest sunset — and is shortest near the December solstice.
- How accurate is the weather forecast for Blue Island?
- The next few days in Blue Island's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Climate
Blue Island, Illinois has a warm-summer humid continental climate: January averages roughly 24°F, July about 76°F, 52°F between them.
Yearly precipitation in Blue Island totals around 37 inches, spread over about 184 days of rain or snow.
Latitude 41.7°N gives Blue Island its 52°F swing, and with it the rhythm of Blue Island's growing season.
ZIP codes in Blue Island
- 60406