Springfield, Illinois Weather
Thunder quiets the land. Day 93 of summer. Read this microseason across nine climate regions →
Springfield weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 12:10 AM CDT · Open-Meteo
- TodaySep 21Rain later53%0.29″68°61°—
- TuesdaySep 22Overcast17%—63°58°-5°
- WednesdaySep 23Overcast——75°52°+12°
- ThursdaySep 24Overcast——74°53°-1°
- FridaySep 25Overcast——74°62°0°
- SaturdaySep 26Light Drizzle—0.01″74°60°0°
- SundaySep 27Overcast——79°54°+5°
Air quality now AQI 37 · Good
AQI 37 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
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).
September dries up ditches or breaks down bridges.
- Moonrise
- 4:31 PM
- Moonset
- 1:20 AM
- In sign
- ♑︎ Capricorn
Thunder quiets the land
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Springfield at a glance
- Today vs. normal: Today averages 65°F (high 68°F, low 61°F), 3°F below the 68°F normal for Sep 21
- Last frost: April 15 (1991–2020 median, NOAA station 4 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, winter squash
15-Day Forecast — Springfield
- Mon68°61°53%
- Tue63°58°17%
- Wed75°52°0%
- Thu74°53°0%
- Fri74°62°1%
- Sat74°60°5%
- Sun79°54°9%
- Mon79°57°11%
- Tue83°57°27%
- Wed90°62°19%
- Thu93°67°10%
- Fri96°65°26%
- Sat88°66°19%
- Sun65°52°12%
- Mon63°43°20%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Springfield
Interactive wind and temperature map centered on Springfield — it loads in your browser. Open the full weather map.
Right now in the garden
Fall planting + final harvests
As of September 21, the season's first frost (typically October 22) is approaching. Pick what frost-tender plants still carry before the next cold front. This city's planting calendar for September: plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, and winter squash.
SPC Convective Outlook
Storm Prediction Center — Springfield
SPC includes Springfield in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook.
Sun & seasons in Springfield
Springfield sits in Sangamon County, where the year’s longest day runs 14h 59m of daylight and its shortest just 9h 21m — a swing of +5h 39m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Chicago, the state’s largest city, lies about 176 miles to the NE. The nearest town Springfield tracks is Bloomington, roughly 61 miles to the NE.
Air quality in Springfield
Air quality in Springfield’s county has held roughly steady since 2020; its cleanest year on record was 2024 (median AQI 41). See the full air-quality history for Springfield.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| March | lettuce, peas, spinach, radishes | — |
| April | lettuce, peas, spinach, radishes | radishes |
| May | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, spinach, summer squash |
| July | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, garlic |
| August | beans, squash, fall brassicas, carrots | tomatoes, peppers, beans, summer squash, winter squash |
| September | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| October | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| November | — | fall brassicas, carrots |
A year in weather
Springfield's warmest month is July (~78°F mean) and its coldest is January (~27°F). Rainfall peaks in May (4.5 inches) and bottoms out in January (1.9 inches).
| Month | Mean temp | Precip |
|---|---|---|
| January | 27° | 1.9″ |
| February | 31° | 2.1″ |
| March | 42° | 3.4″ |
| April | 54° | 4.1″ |
| May | 64° | 4.5″ |
| June | 73° | 4.3″ |
| July | 78° | 2.9″ |
| August | 78° | 2.5″ |
| September | 71° | 2.9″ |
| October | 58° | 3.0″ |
| November | 43° | 3.4″ |
| December | 31° | 2.7″ |
Regional context
Similar climates Southern View, IL, Jerome, IL, Leland Grove, IL
By modelled 1991-2020 normals (EC_Earth3P_HR model via Open-Meteo), Springfield sees 27°F Januarys and 78°F Julys, a 51°F range, plus around 37.7 inches of precipitation.
Rainfall in Springfield splits evenly between the seasons: May tops out at 4.5 inches, and January logs 1.9 inches — neither half of Springfield's year dominates. That lines Springfield up with places like Southern View, IL, Jerome, IL and Leland Grove, IL, fed by overlapping storm tracks.
The cool-season window in Springfield starts at April 15, when nights stop freezing — think kale, peas, spinach, and parsnips. Hold Springfield's tender crops — tomatoes, peppers, basil — until 10-14 days past Springfield's last frost. Springfield's window closes around October 22 as Springfield's overnight lows return below freezing. Sheltered Springfield yards can escape a light frost.
Similar climates: Southern View, IL, Jerome, IL, Leland Grove, IL, Grandview, IL, Rochester, IL.
Frequently asked
- When does it freeze in Springfield?
- In Springfield, expect the last spring frost near April 15; Springfield's first autumn frost comes around October 22.
- What is the rainy season in Springfield?
- Springfield sees its heaviest rain in May (around 4.5 inches), part of roughly 38 inches a year.
- What is the warmest month in Springfield?
- The warmest stretch in Springfield comes in July, around 78°F on average.
- What is the coldest month in Springfield?
- On average January is the chilliest month in Springfield, about 27°F.
- When can I start a vegetable garden in Springfield?
- Springfield's last frost (April 15) cues hardy greens; in Springfield, hold heat-lovers two weeks past.
- What hardiness zone is Springfield?
- Springfield sits in the USDA zone set by January lows near 27°F; the USDA ZIP tool gives the band.
- What is the 10-day forecast for Springfield?
- Springfield'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 Springfield?
- See this week's day-by-day rain chances for Springfield in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Springfield?
- Current conditions for Springfield and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Springfield forecast updated?
- The Springfield forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Springfield?
- Today's sunrise and sunset times for Springfield are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Springfield?
- The next few days in Springfield's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Springfield sits at 39.8°N; its climate zone is humid subtropical (Köppen approximation).
ZIP codes in Springfield
- 62629
- 62701
- 62702
- 62703
- 62704
- 62705
- 62706
- 62707
- 62711
- 62712
- 62715
- 62716
- 62719
- 62722
- 62726
- 62736
- 62739
- 62756
- 62757
- 62761
- 62762
- 62763
- 62765
- 62766
- 62767
- 62769
- 62776
- 62777
- 62781
- 62786
- 62796