30 Day Long Range Weather for Concord, California. Weather Outlook for 30 Days From Today. (2024)

FAQs

What is the extended range weather forecast? ›

For example, charts show if the average conditions over a week are predicted to be colder or warmer than normal for that time of year. The extended-range forecasts are produced daily and have a horizontal resolution of around 36 km.

Forecasters say most of the U.S. is set to have a hotter summer, and 2024 will be one of the five hottest years ever recorded. Meanwhile, hot water in the Atlantic means more fuel for hurricanes.

Even now five-day weather forecasts are about 90% accurate, but 10-day forecasts are more like 50%. Anything beyond that becomes speculative. The Met Office and others do now issue long-term forecasts, but these give probabilities rather than making exact predictions.

There have been tremendous improvements in the accuracy of longer range forecasts over the past several years. A forecast for the 7th day today is as accurate as it was for the 4th or 5th day 10 years ago. Further, there is now skill in forecasting out through 15 days, something that was not possible a few years ago.

The Met Office weather app gives you the most accurate world-leading global weather forecasts, with coverage from 1 hour to 7 days ahead.

The Weather Company, an IBM Business

The world's most accurate forecaster globally, the company reaches hundreds of enterprise clients and more than 400 million monthly active users via its digital properties from The Weather Channel (weather.com) and Weather Underground (wunderground.com).

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.