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Savanna, IL Weather
Current conditions
Forecast for this hour (no station report in the last two hours)
Forecast
10-day-
Tonight
Partly cloudy, with a low around 51. Southeast wind around 5 mph.
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Saturday
Partly sunny. High near 74, with temperatures falling to around 72 in the afternoon. South wind 5 to 10 mph.
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Saturday Night
Partly cloudy. Low around 50, with temperatures rising to around 52 overnight. South wind 0 to 5 mph.
National Weather Service forecast updated 7 hrs ago.
Hourly
Hourly forecast- Now55°
- 2 AM55°
- 3 AM54°
- 4 AM53°
- 5 AM52°
- 6 AM52°
- 7 AM51°
- 8 AM52°
- 9 AM55°
- 10 AM60°
- 11 AM64°
- 12 PM68°
- 1 PM71°
- 2 PM72°
- 3 PM72°
- 4 PM74°
- 5 PM72°
- 6 PM70°
- 7 PM66°
- 8 PM62°
- 9 PM60°
- 10 PM59°
- 11 PM57°
- Sun12 AM56°
10-day forecast
Details- TonightOct 23Partly Cloudy51°
- TodayOct 24Partly Sunny50°74°
- SunOct 25Mostly Sunny50°75°
- MonOct 26Mostly Cloudy46°68°
- TueOct 27Slight Chance Rain Showers16%48°66°
- WedOct 28Partly Sunny18%47°71°
- ThuOct 29Slight Chance Rain Showers18%42°66°
- FriOct 30Chance Rain Showers25%63°
- SatOct 31Cloudy58°73°
- SunNov 1Heavy rain1.50 in53°67°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
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Almanac
MonthlyMount Carroll, records since 1897. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
Forecasters' discussion
From the National Weather Service office in DVN, issued 7 hrs ago
Key Messages
- Above normal temperatures and mostly dry conditions are forecast into early next week, with slightly cooler temperatures possible toward the middle to end of the week.
Short Term
Issued at 215 PM CDT Fri Oct 23 2026
The pleasant late October weather will continue into Saturday with well above normal temperatures and dry conditions.
A 500mb ridge axis will remain situated over the Southern Plains to Mid/Upper Mississippi Valley region, bringing partly sunny skies (passing mid to high clouds) and warm temperatures with highs in the 70s; lows tonight and Sat. night will be in the 50s. Otherwise, expect steady south-southeast winds 5-15 mph, with higher gusts at times during the afternoon hours.
Long Term
Issued at 215 PM CDT Fri Oct 23 2026
By Sunday, a strong low over Hudson Bay will dislodge high pressure from the Great Lakes, pushing it eastward. A diffuse frontal boundary from this system will sag southeastward from the northern Plains, eventually reaching the CWA by Monday and bringing a cooldown to at least part of the CWA. However, model timing still remains quite poor with regard to the front, resulting in a near 10 degree spread across the northwestern half. With this slight cooldown, highs are expected to fall into the mid 60s to mid 70s but remain above the normal highs for late October.
Looking ahead to next week, while guidance has a wide spread regarding that pattern aloft, an eventual return to a more active pattern is expected. Some models, such as the ECMWF, favor a west CONUS trough and eastern CONUS ridge, while the GFS favors a more shallow, near- zonal flow with embedded waves. While the pattern aloft remains unclear this far out, a continuation of our above-normal temperature streak appears likely through the end of October with highs generally in the 60s to 70s.
Additionally, while guidance continues to trend drier along the boundary on Monday, precipitation chances trend higher toward the end of the week. However, there is plenty of uncertainty on placement and timing of systems this far out and the transition to an active pattern may hold off until next weekend. What will favor more widespread precipitation, in addition to a more active pattern, is an increasingly moist airmass with PWATs near 0.8-1.0 inches, or around the 75-90th percentiles.
Aviation
Issued at 604 PM CDT Fri Oct 23 2026
Winds under 10 knots and from the east southeast to southeast through 14z/24. After 14z/24 deeper mixing will begin turnings winds more southerly around 10 knots with gusts up to 20 knots.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.