30 Day Long Range Weather for Springfield, Illinois. Weather Outlook for 30 Days From Today. (2024)

FAQs

How accurate is 28 day weather forecast? ›

The Short Answer: A seven-day forecast can accurately predict the weather about 80 percent of the time and a five-day forecast can accurately predict the weather approximately 90 percent of the time. However, a 10-day—or longer—forecast is only right about half the time.

With the most complete global real-time and historical data, most robust database of forecast models, most advanced forecast engine globally, proprietary patents, and comprehensive validation results, AccuWeather is the most accurate weather company worldwide.

The hottest month of the year in Springfield is July, with an average high of 86°F and low of 67°F.

The AccuWeather 30-Day Forecast is the result of many years of research, backed by great intellectual property and patents, a talented IT staff, and a team of more than 110 meteorologists. In its 50-year history, AccuWeather has consistently pushed the envelope in long-range forecasting.

AccuWeather outperformed ALL other weather services by providing most advance and most accurate forecasts for a major mid-Atlantic snowstorm on January 19, 2024.

ForecastWatch is the only globally recognized measure of forecast accuracy. Of all commercial weather providers, The Weather Company is the most open about what goes into our forecast, how we create it, and how that is measured.

May and June are typically the wettest months, and January and February are the driest. Each year, Illinois has rainstorms producing 40 or more flash-floods each with 4 to 8 inches of rainfall in a few hours in localized areas.

The highest temperature reported in Illinois was 117°F in East St. Louis on July 14, 1954. The lowest temperature reported in Illinois was -36°F in Congerville on January 5, 1999.

In a composite measure of accuracy, the Weather Channel and Weather Underground came top, AccuWeather fifth, MeteoGroup (the BBC's new provider) sixth and the BBC ninth (based on Met Office forecasts).

Who does the most accurate weather forecast? ›

July 29, 2021. IBM and its subsidiary The Weather Company continue to be the overall most accurate weather forecast providers worldwide, according to a new study. The Weather Company includes weather.com and other digital properties of The Weather Channel.

The accuracy of weather predictions tends to decrease as the forecast period extends. The success rate for one-day forecasts is about 96-98%. It drops to about 90% for three-day forecasts. The more days in advance the forecast, the more likely it is that the weather will change.

An assessment from the Post determined that the 45-day forecasts were not even able to predict trends accurately, and that, although the forecasts did not decrease in accuracy with time, the forecasts were so far off even in the short range as to be useless.

“A major goal of our work is to be able to say what the weather will be like a month ahead,” explains Rowan Sutton, climate scientist at the National Centre for Atmospheric Science and the University of Reading. “It will not be possible to predict one month ahead whether a particular day will be sunny or rainy.

July 29, 2021. IBM and its subsidiary The Weather Company continue to be the overall most accurate weather forecast providers worldwide, according to a new study. The Weather Company includes weather.com and other digital properties of The Weather Channel.