By Sam Nelson

CHICAGO (Reuters) - Midday weather updates on Friday indicated little shift from earlier outlooks for dry weather to return to the drought-stricken U.S. Midwest crop region, agricultural meteorologists said.

They said the showers this week as corn and soybeans neared the end of their growing season were too little too late to greatly revive crop prospects.

"There were some decent rains in central Illinois and west central Indiana yesterday, but it's too late for corn and too late for most of the bean crop," said Don Keeney, meteorologist for MDA EarthSat Weather.

The worst drought in more than 50 years through the heart of the summer growing season severely hurt the corn and soybean crops, slashing production and driving prices to record highs.

Rains now will help some of the later-maturing soybeans, mainly in the Northwest, but showers arrived too late to revive any of the corn crop, Keeney said.

From 1.0 to 1.5 inches of rain fell in the central Midwest on Thursday, with up to 2.5 inches in west central Indiana.

There has not been enough rain to end the historic drought, and now it appeared there would be a return to drier weather.

"It looks like a dry weekend and dry next week, there could be some rain in the last week of August," he said.

Cooler temperatures, with highs in the 70s to 80s degrees Fahrenheit, were forecast for most of the Midwest crop region.

The oppressive heat and dryness kept a tight grip on top farm states over the past week. Although there were a few improvements, some areas experienced more serious degradation, according to a weekly report from climate experts released on Thursday.

Rain provided some relief to parched farmland stretching from Iowa through Ohio, but other areas including the Southern and Central Plains remained scorched.

"This week we saw a decline in drought in the lower 48 states for the third week in a row, but the overall decline was small," said Brian Fuchs, a climatologist for the National Drought Mitigation Center at the University of Nebraska.

"Last week drought covered 62.46 percent of the area, and this week 61.77 percent was in drought," he said.

Fuchs said the weekly Drought Monitor released on Thursday showed a one-in-50-year drought was under way in the United States, and no significant letup was in sight from the devastating impact on crops and livestock.

The U.S. Department of Agriculture (USDA) already has made deep cuts for this year's corn and soybean output as the drought spread through America's bread basket.

(Reporting by Sam Nelson; Editing by Marguerita Choy)