Crestwood, Illinois Weather
Solstice approaches — longest light. Day 88 of spring. Read this microseason across nine climate regions →
Crestwood weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Overcast——76°53°—
- TuesdayJun 16Drizzle27%0.03″73°59°-3°
- WednesdayJun 17T-storm w/ Hvy Hail94%0.59″75°54°+2°
- ThursdayJun 18Overcast87%—69°59°-6°
- FridayJun 19Partly Cloudy——71°56°+2°
- SaturdayJun 20Light Drizzle13%0.07″67°56°-4°
- SundayJun 21Light Drizzle39%0.10″62°61°-5°
AQI 49 (Good), driven by Ozone. AQI up 7 over the last 6 hours (gradual rise). Ozone at AQI 41 now. With UV 6.8 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 37 around 1 PM.
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 41 now. With UV 6.8 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 37 around 1 PM.
- Present
- AQI 41
- UV peak
- 6.8 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 37
PM × Wind × Precip
PM2.5 at 6.4 µg/m³, PM10 at 6.7 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).








































A summer fog for fair, a winter fog for rain.
- Moonrise
- 5:16 AM
- Moonset
- 8:44 PM
- In sign
- ♋︎ Cancer
Solstice approaches — longest light
Crestwood at a glance
- Today vs. normal: 4°F below the seasonal normal for this latitude
- Last frost: April 26 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Crestwood
- Mon76°53°1%
- Tue73°59°27%
- Wed75°54°94%
- Thu69°59°87%
- Fri71°56°7%
- Sat67°56°13%
- Sun62°61°39%
- Mon70°60°39%
- Tue77°58°14%
- Wed78°61°8%
- Thu82°63°16%
- Fri87°69°26%
- Sat92°74°32%
- Sun92°76°21%
- Mon84°71°36%
- Tue85°68°40%
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 — Crestwood
SPC has placed Crestwood in the Slight Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWMRGLMarginal Risk
- DAY 3SLGTSlight 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.
Microseason · June 11–15
Solstice approaches — longest light
Sunrise before 5:30 AM; sunset nearly 8:30 PM.
Day 166 of 365 · Wedge 33 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
The year in Crestwood tops out in July (~76°F) and dips lowest in January (~24°F), with May wettest at 4.2 inches and January driest at 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
Per NOAA NCEI 1991-2020 normals, Crestwood runs from a 24°F January mean to 76°F in July, a 53°F seasonal spread, with near 36.8 inches of precipitation across about 184 wet days.
Rainfall in Crestwood 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 Crestwood. It is a balanced pattern Crestwood shares with places like Midlothian, IL, Robbins, IL and Alsip, IL.
Once Crestwood passes mid-April, overnight freezes fade and kale, peas, spinach, and parsnips can be sown. Heat-demanding starts go out a fortnight on in Crestwood, after the soil warms and cold snaps clear. By mid-November, frost is back in Crestwood — protect or harvest anything tender. A creek-bottom lot in Crestwood can lag Crestwood's last frost 7-10 days behind a south slope.
Similar climates: Midlothian, IL, Robbins, IL, Alsip, IL, Oak Forest, IL, Posen, IL.
Frequently asked
- When does it freeze in Crestwood?
- Crestwood's last spring frost lands near mid-April, and in Crestwood the first fall frost follows around mid-November.
- What is the rainy season in Crestwood?
- Crestwood sees its heaviest rain in May (around 4.2 inches), part of roughly 37 inches a year.
- What is the warmest month in Crestwood?
- Crestwood peaks in July, when the mean runs near 76°F.
- What is the coldest month in Crestwood?
- January is Crestwood's coldest month, averaging about 24°F.
- When can I start a vegetable garden in Crestwood?
- Around mid-April, start frost-hardy crops in Crestwood; tomatoes and basil belong a fortnight later.
- How many rainy days does Crestwood get?
- Crestwood averages about 184 days with measurable rain or snow each year.
- What hardiness zone is Crestwood?
- With January around 24°F, Crestwood's zone reflects that minimum — the USDA ZIP map confirms Crestwood's band.
- What is the 10-day forecast for Crestwood?
- Crestwood'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 Crestwood?
- See this week's day-by-day rain chances for Crestwood in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Crestwood?
- Current conditions for Crestwood and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Crestwood forecast updated?
- The Crestwood forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Crestwood?
- Day length in Crestwood peaks around the June solstice — earliest sunrise and latest sunset — and is shortest near the December solstice.
- How accurate is the weather forecast for Crestwood?
- The next few days in Crestwood's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Climate
Set in a warm-summer humid continental zone, Crestwood, Illinois swings from 24°F in the heart of winter to 76°F at midsummer — a 52°F arc.
Yearly precipitation in Crestwood totals around 37 inches, spread over about 184 days of rain or snow.
Crestwood's 52°F range, set by its 41.6°N position, drives frost timing and what thrives in Crestwood.
ZIP codes in Crestwood
- 60418