Washington: Today - Sunny and cooler, high near 80, low near 60. The chance of rain is near zero through tonight. Winds will be from the northwest at 10 to 15 mph. Wednesday - Sunny and pleasant, high near 85.

Maryland and Virginia: Today - Sunny and cooler, highs in the mid 70s to mid 80s, lows in the 50s to low 60s. Wednesday - Sunny and pleasant, high in the 80s.

Extended Area Forecast for Thursday through Saturday - Fair and pleasant Thursday, becoming partly cloudy and warmer Friday and Saturday. Highs will range from the upper 70s early in the period to the 80s Friday and Saturday, lows will be in the 50s and 60s. Normal Washington temperatures are a high of 88 and a low of 69.

Lower Potomac and Chesapeake Bay - Fair with visibility of 5 miles or more. Winds will be from the north at 18 knots diminishing to near 10 knots by nightfall. Waves will average 1 to 2 feet.

Atlantic Ocean Beaches from New Jersey to Virginia: Today - Sunny, cooler and less humid, high from the mid 70s to near 80. Wednesday - Sunny and pleasant, high near 80. Water temperatures will be in the upper 60s to the low 70s.

The National Weather forecast for today - There is a chance of morning showers in northern Vermont and northern Maine. Scattered thundershowers will spread from the lower Mississippi Valley across the eastern Gulf and south Atlantic Coast states. Afternoon and evening thundershowers will extend from Idaho and Montana over Utah, Arizona and into Nebraska and the Dakota. Isolated thundershowers will dot the south and central Rockies. Mostly sunny weather will continue elsewhere. It will be warmer over much of the Great Lakes region and the northern half of the Great Plains, but cooler from the upper Ohio Valley through the middle and north Atlantic Coastal states. Mild weather will continue from the Pacific Northwest and northern California across the northern half of the Rockies. The rest of the nation will be seasonably warm.

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m. period was 70 for the pollutant, photochemical oxidants. Index values between 50 and 99 indicate unhealthy air quality. When the index exceeds 100 the air is considered very unhealthy and individuals with lung, heart and eye ailments are urged to restrict their activity. The forecast for today indicates that the air quality will improve.

The National Weather Service forecasts the Potomac River Stage at Little Falls should fall to near 3.8 feet today.

Almanac Data for today: The sun rises 5:52 a.m., sets 8:35 p.m.; moon rises 11:42 a.m., sets 12:01 a.m. Tides: high 12:41 p.m., low 7:20 a.m., and 7:29 p.m. High and low tides at the following locations may be obtained by subtracting the hours indicated from the hours above: Annapolis (3 1/4), Bloody Point Lighthouse (4 1/2), Deale, Md. (4 1/2), Colonial Beach (5 1/4), Norfolk (1), Virginia Beach (3/4), Solomons Island (6 1/4), Point Lookout (7).

Pollen Count: 14 English Plaintain (a reading of more than 7 is considered to be undesirable). Local Temps., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)79(COLUMN)85 1 a.m.(COLUMN)78(COLUMN)88 2 a.m.(COLUMN)77(COLUMN)88 3 a.m.(COLUMN)77(COLUMN)88 4 a.m.(COLUMN)76(COLUMN)91 5 a.m.(COLUMN)76(COLUMN)91 6 a.m.(COLUMN)75(COLUMN)94 7 a.m.(COLUMN)76(COLUMN)91 8 a.m.(COLUMN)77(COLUMN)88 9 a.m.(COLUMN)80(COLUMN)82 10 a.m.(COLUMN)83(COLUMN)77 11 a.m.(COLUMN)85(COLUMN)66 12 noon(COLUMN)90(COLUMN)62 1 p.m.(COLUMN)93(COLUMN)54 2 p.m.(COLUMN)93(COLUMN)54 3 p.m.(COLUMN)92(COLUMN)58 4 p.m.(COLUMN)92(COLUMN)58 5 p.m.(COLUMN)94(COLUMN)53 6 p.m.(COLUMN)89(COLUMN)54 7 p.m.(COLUMN)75(COLUMN)85(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)86(COLUMN)62 Albuquerque(COLUMN)99(COLUMN)72 Amarillo(COLUMN)96(COLUMN)64 Anchorage(COLUMN)65(COLUMN)56 Asheville(COLUMN)89(COLUMN)63 Atlanta(COLUMN)95(COLUMN)68 Atlantic City(COLUMN)90(COLUMN)70 Austin(COLUMN)99(COLUMN)78 Baltimore(COLUMN)92(COLUMN)71 Billings(COLUMN)70(COLUMN)53 Birmingham(COLUMN)96(COLUMN)73 Bismarck(COLUMN)72(COLUMN)47 Boise(COLUMN)91(COLUMN)59 Boston(COLUMN)88(COLUMN)68 Brownsville(COLUMN)98(COLUMN)77 Buffalo(COLUMN)80(COLUMN)65 Burlington, Vt.(COLUMN)85(COLUMN)66 Casper(COLUMN)75(COLUMN)50 Charleston, S.C.(COLUMN)93(COLUMN)79 Charleston, W.V.(COLUMN)88(COLUMN)73 Charlotte(COLUMN)94(COLUMN)71 Cheyenne(COLUMN)70(COLUMN)50 Chicago(COLUMN)84(COLUMN)62 Cincinatti(COLUMN)87(COLUMN)71 Cleveland(COLUMN)85(COLUMN)68 Columbia, S.C.(COLUMN)95(COLUMN)67 Columbus(COLUMN)86(COLUMN)74 Dal.-Ft. Worth(COLUMN)104(COLUMN)79 Dayton(COLUMN)89(COLUMN)74 Denver(COLUMN)70(COLUMN)56 Des Moines(COLUMN)82(COLUMN)58 Detroit(COLUMN)83(COLUMN)64 Duluth(COLUMN)68(COLUMN)45 El Paso(COLUMN)101(COLUMN)68 Fairbanks(COLUMN)76(COLUMN)61 Fargo(COLUMN)71(COLUMN)48 Flagstaff(COLUMN)84(COLUMN)50 Great Falls(COLUMN)79(COLUMN)55 Hartford(COLUMN)90(COLUMN)67 Helena(COLUMN)78(COLUMN)56 Honolulu(COLUMN)85(COLUMN)74 Houston(COLUMN)95(COLUMN)79 Indianapolis(COLUMN)89(COLUMN)75 Jackson(COLUMN)97(COLUMN)76 Jacksonville(COLUMN)93(COLUMN)72 Juneau(COLUMN)58(COLUMN)47 Kansas City(COLUMN)85(COLUMN)61 Las Vegas(COLUMN)110(COLUMN)81 Little Rock(COLUMN)100(COLUMN)76 Los Angeles(COLUMN)81(COLUMN)59 Louisville(COLUMN)88(COLUMN)74 Memphis(COLUMN)96(COLUMN)77 Miami Beach(COLUMN)86(COLUMN)80 Midland(COLUMN)96(COLUMN)70 Milwaukee(COLUMN)81(COLUMN)55 Mpls.-St. Paul(COLUMN)74(COLUMN)52 Nashville(COLUMN)96(COLUMN)71 New Orleans(COLUMN)92(COLUMN)73 New York(COLUMN)88(COLUMN)75 Norfolk(COLUMN)93(COLUMN)75 North Platte(COLUMN)75(COLUMN)50 Oklahoma City(COLUMN)105(COLUMN)78 Omaha(COLUMN)75(COLUMN)56 Orlando(COLUMN)93(COLUMN)73 Philadelphia(COLUMN)91(COLUMN)73 Phoenix(COLUMN)110(COLUMN)81 Pittsburgh(COLUMN)84(COLUMN)70 Portland, Me.(COLUMN)82(COLUMN)61 Portland, Ore.(COLUMN)72(COLUMN)49 Raleigh(COLUMN)95(COLUMN)74 Rapid City(COLUMN)68(COLUMN)53 Reno(COLUMN)93(COLUMN)46 Richmond(COLUMN)96(COLUMN)73 St. Louis(COLUMN)87(COLUMN)73 St. Prbg.-Tampa(COLUMN)91(COLUMN)76 Salt Lake City(COLUMN)90(COLUMN)62 San Antonio(COLUMN)97(COLUMN)78 San Diego(COLUMN)74(COLUMN)66 San Francisco(COLUMN)61(COLUMN)53 San Juan(COLUMN)89(COLUMN)77 St. Ste. Marie(COLUMN)74(COLUMN)49 Seattle(COLUMN)69(COLUMN)52 Shreveport(COLUMN)101(COLUMN)77 Sioux Falls(COLUMN)70(COLUMN)46 Spokane(COLUMN)81(COLUMN)55 Syracuse(COLUMN)79(COLUMN)65 Topeka(COLUMN)85(COLUMN)61 Tucson(COLUMN)102(COLUMN)77 Tulsa(COLUMN)106(COLUMN)77 Washington(COLUMN)92(COLUMN)75 Wichita(COLUMN)105(COLUMN)69(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)55 Amsterdam(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)63 Ankara(COLUMN)clear(COLUMN)3 p.m.(COLUMN)90 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)84 Auckland(COLUMN)pt. cldy(COLUMN)m'night(COLUMN)50 Berlin(COLUMN)rain(COLUMN)1 p.m.(COLUMN)63 Birmingham(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)66 Bonn(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Cairo(COLUMN)clear(COLUMN)2 p.m.(COLUMN)95 Casablanca(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)73 Copenhagen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)66 Dublin(COLUMN)rain(COLUMN)1 p.m.(COLUMN)57 Geneva(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)68 Hong Kong(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)86 Jerusalem(COLUMN)clear(COLUMN)2 p.m.(COLUMN)90 Lisbon(COLUMN)clear(COLUMN)noon(COLUMN)70 London(COLUMN)clear(COLUMN)1 p.m.(COLUMN)64 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)86 Malta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)79 Manila(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)81 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)70 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)93 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)73 Oslo(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)75 Paris(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)64 Peking(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)79 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)79 Saigon(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)84 Sofia(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)77 Stockholm(COLUMN)rain(COLUMN)1 p.m.(COLUMN)63 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)46 Tokyo(COLUMN)pt. cldy.(COLUMN)9 p.m.(COLUMN)79 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)84 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Warsaw(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)57(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)pt. cldy.(COLUMN)89(COLUMN)75 Barbados(COLUMN)pt. cldy.(COLUMN)87(COLUMN)81 Bermuda(COLUMN)fair(COLUMN)84(COLUMN)80 Calgary(COLUMN)cloudy(COLUMN)72(COLUMN)54 Edmonton(COLUMN)cloudy(COLUMN)73(COLUMN)55 Havana(COLUMN)cloudy(COLUMN)89(COLUMN)73 Kingston(COLUMN)fair(COLUMN)89(COLUMN)79 Montego Bay(COLUMN)fair(COLUMN)89(COLUMN)74 Mexico City(COLUMN)haza(COLUMN)75(COLUMN)59 Monterrey(COLUMN)clear(COLUMN)100(COLUMN)73 Montreal(COLUMN)pt. cldy.(COLUMN)79(COLUMN)64 Ottawa(COLUMN)cloudy(COLUMN)77(COLUMN)63 Regina(COLUMN)clear(COLUMN)72(COLUMN)48 St. Kitts(COLUMN)cloudy(COLUMN)88(COLUMN)74 Toronto(COLUMN)clear(COLUMN)81(COLUMN)61 Vancouver(COLUMN)rain(COLUMN)68(COLUMN)52 Veracruz(COLUMN)cloudy(COLUMN)89(COLUMN)72 Winnipeg(COLUMN)clear(COLUMN)66(COLUMN)45(END TABLE)