Forecast by NWS Central Illinois · grid 22,109

40.9880, -90.3180

The day

NWS forecast grid, daily figures derived from the hourly
High
75°
Low
63°
Chance
42%
Amount
0.07 in
Wind
10 mph
gusts 17 mph
Sky cover
55%
Thunder
19%
  1. Tuesday

    A slight chance of rain showers after 1pm. Partly sunny, with a high near 75. South southeast wind 5 to 10 mph, with gusts as high as 17 mph. New rainfall amounts less than a tenth of an inch possible.

  2. Tuesday Night

    A slight chance of rain showers before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.

Hour by hour

NWS forecast grid

Scroll sideways for more hours. Pick an hour for every number.

Every hour as a table24 hours
TimeWeatherTemperatureFeels likeDew pointHumidityChanceAmountSnowDirWindGustSky coverThunderPressureVisibilityCeiling
Tue 12 AM58°58°55°90%0%ESE2 mph7 mph18%——
Tue 1 AM58°58°55°90%0%SE2 mph7 mph18%——
Tue 2 AM58°58°55°90%0%SE2 mph8 mph20%——
Tue 3 AM57°57°55°93%0%SE3 mph8 mph21%——
Tue 4 AM57°57°55°93%0%SE3 mph9 mph23%——
Tue 5 AM57°57°55°93%0%SE3 mph9 mph27%——
Tue 6 AM57°57°55°93%0%SE5 mph10 mph31%——
Tue 7 AM57°57°55°93%1%SE5 mph10 mph35%1%——
Tue 8 AM59°59°56°90%1%SSE5 mph12 mph42%1%——
Tue 9 AM61°61°57°87%1%SSE6 mph13 mph48%1%——
Tue 10 AM64°64°58°81%1%SSE7 mph14 mph55%1%——
Tue 11 AM67°67°59°75%1%SSE8 mph15 mph61%1%——
Tue 12 PM69°69°59°70%1%S9 mph16 mph68%1%——
Tue 1 PMSlight chance of light rain showers72°72°60°66%19%0.01 inS10 mph17 mph74%5%——
Tue 2 PMSlight chance of light rain showers73°73°60°64%19%0.01 inS10 mph17 mph72%5%——
Tue 3 PMSlight chance of light rain showers74°74°61°64%19%0.01 inS10 mph17 mph71%5%——
Tue 4 PMSlight chance of light rain showers74°74°61°64%19%0.01 inS9 mph16 mph69%5%——
Tue 5 PMSlight chance of light rain showers73°73°61°66%19%0.01 inSSE8 mph15 mph73%5%——
Tue 6 PMSlight chance of light rain showers71°71°61°71%19%0.01 inSSE8 mph14 mph77%5%——
Tue 7 PMChance of light rain showers and slight chance of thunderstorms68°68°61°78%42%0.01 inSSE8 mph14 mph81%19%——
Tue 8 PMChance of light rain showers and slight chance of thunderstorms67°67°60°78%42%0.01 inSSE8 mph15 mph81%19%——
Tue 9 PMChance of light rain showers and slight chance of thunderstorms66°66°59°78%42%0.01 inSSE9 mph16 mph81%19%——
Tue 10 PMChance of light rain showers and slight chance of thunderstorms65°65°59°81%42%0.01 inSSE9 mph17 mph81%19%——
Tue 11 PMChance of light rain showers and slight chance of thunderstorms64°64°59°84%42%0.01 inSSE9 mph17 mph81%19%——

Against the record

NOAA GHCN · Galesburg (GBG) · 6.8 mi away

Each forecast day against the same calendar date at the nearest long-record station: the 1991 to 2020 normal, and the record high and low with the year they were set.

DayForecastNormalRecord highRecord low
Tue Sep 2975° / 63°71° / 48°97° (1953)27° (1899)

Sun and moon

DayCivil twilightSunriseSunsetCivil twilightDaylightMoon
Tue6:29 AM6:56 AM6:46 PM7:14 PM11 h 50 min Waning gibbous · 90% lit

Forecast from the National Weather Service forecast grid at api.weather.gov, updated by the local office through the day; the written periods and hourly digest are the NWS’s own. Outlooks from the Storm Prediction Center, the Weather Prediction Center and the Climate Prediction Center via NOAA’s map services. Records and normals from NOAA’s Global Historical Climatology Network. Sun and moon computed here. Place names from GeoNames (CC BY 4.0).

What is here

Seven days
The high, the low, the chance and amount of rain and snow, the wind and the forecaster’s words for each day and night, from the National Weather Service grid for the exact cell your town sits in.
Hour by hour
Temperature, what it feels like, dew point, humidity, chance and amount of precipitation, wind and gusts, sky cover, the chance of thunder, pressure, visibility and ceiling, as a chart and as a table, with nights shaded.
Everything else on the grid
The office edits about sixty fields for every cell. The ones the mainstream forecast pages leave out are here as a daily table: HeatRisk, wet bulb globe temperature, lightning activity, mixing height, transport wind, the fire weather indices, and at the coast the waves and swell.
The discussion
The Area Forecast Discussion the forecaster wrote to explain the forecast, in their own words, with the specialist annexes folded away. Also the office’s hazardous weather outlook.
Beyond the week
The Storm Prediction Center’s severe weather category for each of the next eight days, the Weather Prediction Center’s rainfall forecast to day seven and its winter storm severity, and the Climate Prediction Center’s odds for days six to fourteen, all read at your coordinate.
Against the record
Each forecast day beside the same date at the nearest long-record station: the thirty-year normal and the record high and low with their years, so a forecast high that would break a record says so.
The next 90 days
The forecast as far as the grid, the National Blend and the global models reach, and the calendar after that: the normal and the record for every date, with the Climate Prediction Center’s lean for the weeks, the month and the season drawn over them. No made-up highs for a date three months out.

Common questions

Where does this forecast come from?

From the National Weather Service forecast grid published at api.weather.gov, the same grid the local forecast office edits through the day and the source of every forecast on weather.gov. The written periods, the hourly digest and the forecaster’s discussion are the NWS’s own products, shown as issued. Nothing here is a blend a website made.

How far ahead does it go?

The grid runs seven days ahead, hour by hour for the first days and in three to six hour steps after that. The National Blend of Models carries the days to eleven and the global models to sixteen. Beyond that the page carries the national centers’ outlooks, severe weather to day eight, rainfall to day seven, and the Climate Prediction Center’s odds for the coming weeks, month and season, over a ninety-day calendar of the normal and the record for each date. No forecast has skill day by day past about two weeks, and this page does not print one.

Why is this different from the app on my phone?

Most forecast apps show a blend of models chosen by the company that makes the app. This page shows the forecast the local National Weather Service office issues, edited by the forecasters who will also issue the warnings, and it shows all of it rather than the six numbers that fit on a phone. The discussion explains the reasoning, which no app carries.

What is a place’s address here?

Every town has its own page, such as /forecast/us/oklahoma/oklahoma-city/, and every day at a town has one too. A ZIP code typed into the search goes to the town it belongs to. Any coordinate at all can be looked up, and the page names the nearest town.

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