Washington: Today - Partly cloudy, high in upper 80s, low in upper 60s. Chance of rain 20 percent, 10 percent tonight. Winds will be southwesterly at 15 mph. Saturday - Sunny, high 82 to 86.

Maryland and Virginia: Today - Partly cloudy, high in mid 80s, low in mid 60s. Saturday - Sunny high in mid 80s.

Lower Potomac and Chesapeake Bay: Today - Fair with a chance of early morning thundershowers, visibility more than five miles. Winds will be from the northwest at 30 knots. Waves in unprotected waters will be 3 feet.

Atlantic Ocean Beaches from New Jersey to North Carolina: Partly cloudy with a chance of thundershowers in the south, highs in the mid 80s. Saturday - Sunny, highs in the low to mid 80s. Water temperatures will be 79 in the north to near 80 in the south.

Extended Area Outlook for Sunday through Tuesday: Variable cloudiness with a chance of showers of thunderstorms Sunday and Monday. Highs will be in the 80s and low in mid 60s to low 70s. It will be fair and pleasant on Tuesday with highs in the mid 80s and low in the upper 60s. Normal Washington temperatures for the period will be a high of 88 and a low of 68.

West Virginia: Today - Partly cloudy, highs from mid 70s to mid 80s, lows from mid 50s to low 60s. Saturday - Mostly Sunny, highs in mid 70s to low 80s.

The National Weather Forecast for today - Showers will be scattered from northern New England into northeastern New York. Showers will also be scattered over the western end of Lake Superior and widely scattered over eastern portions of the southern Plateau region. Showers and thunderstorms will extend from the Virginia coast through Florida, across the lower Appalachians and Gulf Coast states into eastern Texas. Temperatures will be hot from the upper two thirds of the Missouri Valley into the Texas Panhandle. Mild temperatures will extend along the Great Lakes into western New England. Elsewhere, temperatures over the nation will be seasonably warm.

Almanac Data for today: The sun rises 6:05 a.m., sets 8:23 p.m.; moon rises 1:14 a.m., sets 3:14 p.m. Tides: high 3:10 a.m. and 3:42 p.m., low 8:55 a.m. and 10:30 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 3/4), Point Lookout (7).

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 2 to 3 p.m. period was 50 for the pollutant, photochemical toxicants. Index values between 50 and 99 indicate unhealthy air quality. When the inches 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.

Local Temps., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnight(COLUMN)73(COLUMN)91 1 a.m.(COLUMN)77(COLUMN)97 2 a.m.(COLUMN)77(COLUMN)94 3 a.m.(COLUMN)77(COLUMN)97 4 a.m.(COLUMN)77(COLUMN)97 5 a.m.(COLUMN)77(COLUMN)97 6 a.m.(COLUMN)76(COLUMN)100 7 a.m.(COLUMN)77(COLUMN)97 8 a.m.(COLUMN)78(COLUMN)94 9 a.m.(COLUMN)81(COLUMN)85 10 a.m.(COLUMN)84(COLUMN)77 11 a.m.(COLUMN)88(COLUMN)70 12 noon(COLUMN)90(COLUMN)64 1 p.m.(COLUMN)91(COLUMN)62 2 p.m.(COLUMN)93(COLUMN)58 3 p.m.(COLUMN)94(COLUMN)56 4 p.m.(COLUMN)96(COLUMN)50 6 p.m.(COLUMN)93(COLUMN)56 7 p.m.(COLUMN)89(COLUMN)64(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)80(COLUMN)65 Albuquerque(COLUMN)100(COLUMN)70 Amarillo(COLUMN)97(COLUMN)65 Anchorage(COLUMN)67(COLUMN)58 Asheville(COLUMN)88(COLUMN)64 Atlanta(COLUMN)85(COLUMN)64 Atlantic City(COLUMN)78(COLUMN)68 Austin(COLUMN)97(COLUMN)78 Baltimore(COLUMN)83(COLUMN)73 Billings(COLUMN)90(COLUMN)60 Birmingham(COLUMN)90(COLUMN)73 Bismarck(COLUMN)82(COLUMN)65 Boise(COLUMN)105(COLUMN)64 Boston(COLUMN)77(COLUMN)64 Brownsville(COLUMN)97(COLUMN)77 Buffalo(COLUMN)86(COLUMN)66 Burlington(COLUMN)80(COLUMN)68 Casper(COLUMN)89(COLUMN)54 Charleston, S.C.(COLUMN)91(COLUMN)74 Charleston, W.Va.(COLUMN)84(COLUMN)67 Charlotte(COLUMN)91(COLUMN)72 Cheyenne(COLUMN)85(COLUMN)53 Chicago(COLUMN)88(COLUMN)66 Cincinnati(COLUMN)88(COLUMN)66 Cleveland(COLUMN)92(COLUMN)72 Columbia, S.C.(COLUMN)90(COLUMN)70 Columbus(COLUMN)89(COLUMN)70 Dal.-Ft. Worth(COLUMN)101(COLUMN)75 Dayton(COLUMN)89(COLUMN)64 Denver(COLUMN)92(COLUMN)98 Des Moines(COLUMN)87(COLUMN)64 Detroit(COLUMN)96(COLUMN)65 Duluth(COLUMN)80(COLUMN)56 El Paso(COLUMN)100(COLUMN)66 Fairbanks(COLUMN)70(COLUMN)57 Fargo(COLUMN)82(COLUMN)53 Flagstaff(COLUMN)83(COLUMN)55 Great Falls(COLUMN)96(COLUMN)66 Hartford(COLUMN)82(COLUMN)64 Helena(COLUMN)93(COLUMN)65 Honolulu(COLUMN)88(COLUMN)74 Houston(COLUMN)93(COLUMN)78 Indianapolis(COLUMN)91(COLUMN)67 Jackson, Miss.(COLUMN)93(COLUMN)68 Jacksonville(COLUMN)92(COLUMN)67 Juneau(COLUMN)56(COLUMN)46 Kansas City(COLUMN)92(COLUMN)63 Las Vegas(COLUMN)98(COLUMN)82 Little Rock(COLUMN)97(COLUMN)67 Los Angeles(COLUMN)86(COLUMN)67 Louisville(COLUMN)92(COLUMN)69 Memphis(COLUMN)95(COLUMN)69 Miami Beach(COLUMN)84(COLUMN)78 Midland-Odessa(COLUMN)94(COLUMN)69 Milwaukee(COLUMN)82(COLUMN)66 Mpls.-St. Paul(COLUMN)85(COLUMN)61 Nashville(COLUMN)91(COLUMN)72 New Orleans(COLUMN)88(COLUMN)73 New York(COLUMN)77(COLUMN)69 Norfolk(COLUMN)84(COLUMN)72 North Platte(COLUMN)89(COLUMN)65 Oklahoma City(COLUMN)106(COLUMN)73 Omaha(COLUMN)84(COLUMN)65 Orlando(COLUMN)91(COLUMN)72 Philadelphia(COLUMN)85(COLUMN)72 Phoenix(COLUMN)100(COLUMN)82 Pittsburgh(COLUMN)86(COLUMN)71 Portland, Me.(COLUMN)75(COLUMN)57 Portland, Ore.(COLUMN)85(COLUMN)57 Providence(COLUMN)74(COLUMN)62 Raleigh(COLUMN)89(COLUMN)72 Rapid City(COLUMN)88(COLUMN)57 Reno(COLUMN)91(COLUMN)56 Richmond(COLUMN)93(COLUMN)72 St. Louis(COLUMN)94(COLUMN)66 St. Pbg.-Tampa(COLUMN)68(COLUMN)72 Salt Lake City(COLUMN)101(COLUMN)66 San Antonio(COLUMN)97(COLUMN)77 San Diego(COLUMN)79(COLUMN)70 San Francisco(COLUMN)65(COLUMN)54 San Juan(COLUMN)89(COLUMN)77 St. Ste. Marie(COLUMN)81(COLUMN)55 Seattle(COLUMN)72(COLUMN)58 Shreveport(COLUMN)99(COLUMN)68 Sioux Falls(COLUMN)86(COLUMN)56 Spokane(COLUMN)86(COLUMN)57 Topeka(COLUMN)89(COLUMN)59 Tucson(COLUMN)95(COLUMN)74 Tulsa(COLUMN)106(COLUMN)68 Washington(COLUMN)87(COLUMN)76 Wichita(COLUMN)102(COLUMN)62(END TABLE) Temperatures Aboard Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Amsterdam(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)68 Ankara(COLUMN)clear(COLUMN)3 p.m.(COLUMN)75 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)86 Auckland(COLUMN)clear(COLUMN)12 p.m.(COLUMN)68 Berlin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)73 Birmingham(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)73 Bonn(COLUMN)pt cldy(COLUMN)1 p.m.(COLUMN)73 Brussels(COLUMN)pt cldy(COLUMN)1 p.m.(COLUMN)68 Casablanca(COLUMN)clear(COLUMN)12 p.m.(COLUMN)75 Copenhagen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)7o Dublin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)66 Geneva(COLUMN)clear(COLUMN)1 p.m.(COLUMN)73 Hong Kong(COLUMN)rain(COLUMN)8 p.m.(COLUMN)79 Jerusalem(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)77 Lisbon(COLUMN)clear(COLUMN)12 p.m.(COLUMN)79 London(COLUMN)clear(COLUMN)1 p.m.(COLUMN)73 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)91 Malta(COLUMN)pt cldy(COLUMN)1 p.m.(COLUMN)82 Manila(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)81 Moscow(COLUMN)pt cldy(COLUMN)3 p.m.(COLUMN)68 New Delhi(COLUMN)rain(COLUMN)5 p.m.(COLUMN)81 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)77 Oslo(COLUMN)rain(COLUMN)1 p.m.(COLUMN)59 Paris(COLUMN)clear(COLUMN)1 p.m.(COLUMN)72 Peking(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)79 Rome(COLUMN)pt cldy(COLUMN)1 p.m.(COLUMN)82 Saigon(COLUMN)pt cldy(COLUMN)8 p.m.(COLUMN)82 Sofia(COLUMN)pt cldy(COLUMN)2 p.m.(COLUMN)75 Stockholm(COLUMN)clear(COLUMN)1 p.m.(COLUMN)72 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)52 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)81 Tunis(COLUMN)pt cldy(COLUMN)1 p.m.(COLUMN)90 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)79 Warsaw(COLUMN)clear(COLUMN)1 p.m.(COLUMN)79(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)pt. cldy(COLUMN)90(COLUMN)79 Barbados(COLUMN)cloudy(COLUMN)84(COLUMN)76 Bermuda(COLUMN)pt. cldy(COLUMN)83(COLUMN)76 Calgary(COLUMN)clear(COLUMN)86(COLUMN)63 Culiacan(COLUMN)cloudy(COLUMN)95(COLUMN)79 Edmontan(COLUMN)storm(COLUMN)88(COLUMN)61 Havana(COLUMN)pt. cldy(COLUMN)88(COLUMN)74 Kingston(COLUMN)pt. cldy(COLUMN)57(COLUMN)74 Montego Bay(COLUMN)cloudy(COLUMN)50(COLUMN)76 Mexico City(COLUMN)cloudy(COLUMN)75(COLUMN)56 Monterrey(COLUMN)pt. cldy(COLUMN)99(COLUMN)76 Montreal(COLUMN)pt. cldy(COLUMN)79(COLUMN)73 Nassau(COLUMN)cloudy(COLUMN)86(COLUMN)76 Ottawa(COLUMN)cloudy(COLUMN)79(COLUMN)68 Regina(COLUMN)cloudy(COLUMN)79(COLUMN)65 St. Kitts(COLUMN)fair(COLUMN)98(COLUMN)78 St. Thomas(COLUMN)fair(COLUMN)89(COLUMN)79 Toronto(COLUMN)cloudy(COLUMN)86(COLUMN)64 Vancouver(COLUMN)cloudy(COLUMN)73(COLUMN)61 Veracruz(COLUMN)pt. cldy(COLUMN)88(COLUMN)77 Winnipeg(COLUMN)clear(COLUMN)72(COLUMN)43(END TABLE)