Washington: Today - Cloudy, high in the upper 70s, low in the mid 60s. The chance of rain is 20 percent through tonight. Winds will be light and variable. Tuesday - Partly cloudy, high in the mid 80s.

Maryland and Virginia: Today - Cloudy, high in the upper 70s, low in the mid 60s. Tuesday - Cloudy, high in the mid 80s.

Lower Potomac and Chesapeake Bay: Today - Fair, visibility of more than five miles. Winds will be from the south, at 10 knots. Waves in uprotected waters will be 1 to 2 feet.

Atlantic Ocean Beaches from New Jersey to North Carolina: Today - Cloudy with morning fog and brief periods of afternoon sunshine. Highs will be in the upper 60s, with water temperatures in the mid 50s in the north, to the low 60s in the south. Tuesday - partly cloudy, high near 80.

Extended Area Outlook for Wednesday through Friday: Partly cloudy with a chance of rain during the period. Highs will range from the low to mid 80s, lows from 60 to the mid 60s. Normal Washington temperatures for the period are a high of 81 and a low of 61.

The National Weather Forecast for today - Showers and thunderstorms will be quite numerous over the Mississippi Valley, the upper Great Lakes region, the lower Ohio Valley and the eastern Gulf Coast states. Skies will be mostly sunny in other sections of the nation, except for a few showers along the mid-Atlantic Coast.Warm temperatures will prevail from the Mississippi River to the Atlantic Coast, as well as over the desert southwest and much of California. It will be mild over the remainder of the western U.S. and the Great Plains.

Almanac Data for today: The sun rises 5:46 a.m., sets 8:25 p.m.; moon rises 12:42 a.m., sets 12:29 p.m. Tides: high 2:37 a.m. and 2:59 p.m. low 9:25 a.m. and 9:51 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). Local Temps., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)68(COLUMN)84 1 a.m.(COLUMN)67(COLUMN)84 2 a.m.(COLUMN)67(COLUMN)84 3 a.m.(COLUMN)67(COLUMN)84 4 a.m.(COLUMN)67(COLUMN)81 5 a.m.(COLUMN)67(COLUMN)81 6 a.m.(COLUMN)67(COLUMN)81 7 a.m.(COLUMN)67(COLUMN)81 8 a.m.(COLUMN)68(COLUMN)84 9 a.m.(COLUMN)69(COLUMN)79 10 a.m.(COLUMN)63(COLUMN)79 11 a.m.(COLUMN)70(COLUMN)79 12 noon(COLUMN)70(COLUMN)79 1 p.m.(COLUMN)72(COLUMN)76 2 p.m.(COLUMN)75(COLUMN)71 2 p.m.(COLUMN)75(COLUMN)71 3 p.m.(COLUMN)76(COLUMN)69 4 p.m.(COLUMN)79(COLUMN)63 5 p.m.(COLUMN)79(COLUMN)60 6 p.m.$79(COLUMN)60 7 p.m.(COLUMN)77(COLUMN)64(END TABLE)

The Council of Governments' Air Quality index for yesterday showed the high reading in the Washington area during the 12 p.m. to 1 p.m. p eriod was 15 for the pollutant photochemical oxidants. Index values between 0 and 25 indicate good 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. Temperatures ending 8 a.m. (EDT) yesterday: (TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)84(COLUMN)59 Albuquerque(COLUMN)80(COLUMN)43 Amarillo(COLUMN)68(COLUMN)58 Anchorage(COLUMN)58(COLUMN)41 Asheville(COLUMN)82(COLUMN)63 Atlanta(COLUMN)85(COLUMN)68 Atlantic City(COLUMN)54(COLUMN)52 Austin(COLUMN)90(COLUMN)73 Baltimore(COLUMN)74(COLUMN)64 Billings(COLUMN)77(COLUMN)48 Birmingham(COLUMN)86(COLUMN)67 Bismar ck(COLUMN)74(COLUMN)73 Boise(COLUMN)72(COLUMN)46 Boston(COLUMN)59(COLUMN)55 Brownsville(COLUMN)95(COLUMN)73 Buffalo(COLUMN)89(COLUMN)63 Burington(COLUMN)90(COLUMN)68 Casper(COLUMN)63(COLUMN)44 Charleston,S.C.(COLUMN)86(COLUMN)70 Charleston,W.Va.(COLUMN)88(COLUMN)62 Charlotte(COLUMN)85(COLUMN)6 Cheyenne(COLUMN)60(COLUMN)44 Chicago(COLUMN)87(COLUMN)65 Cincinnati(COLUMN)88(COLUMN)63 Cleveland(COLUMN)84(COLUMN)63 Columbia,S.C.(COLUMN)88(COLUMN)60 Dal.Ft.Worth(COLUMN)91(COLUMN)66 Dayton(COLUMN)88(COLUMN)63 Denver(COLUMN)62(COLUMN)44 Des Maines(COLUMN)86(COLUMN)64 Detroit(COLUMN)87(COLUMN)57 Duluth(COLUMN)74(COLUMN)60 El Paso(COLUMN)88(COLUMN)50 Fairbanks(COLUMN)53(COLUMN)32 Fargo(COLUMN)72(COLUMN)49 Flagstaff(COLUMN)71(COLUMN)35 Great Falls(COLUMN)69(COLUMN)47 Hartford(COLUMN)82(COLUMN)61 Helena(COLUMN)72(COLUMN)46 Honolulu(COLUMN)82(COLUMN)74 Houston(COLUMN)84(COLUMN)74 Indianapolis(COLUMN)90(COLUMN)65 Jackson,Miss.(COLUMN)93(COLUMN)69 Jacksonville(COLUMN)85(COLUMN)63 Juneau(COLUMN)60(COLUMN)45 Kansas City(COLUMN)79(COLUMN)65 Las Vegas(COLUMN)93(COLUMN)64 Little Rock(COLUMN)93(COLUMN)72 Los Angeles(COLUMN)79(COLUMN)63 Louisville(COLUMN)83(COLUMN)61 Memphis(COLUMN)93(COLUMN)72 Mlami Beach(COLUMN)81(COLUMN)73 Midland-Odessa(COLUMN)88(COLUMN)63 Milwaukee(COLUMN)88(COLUMN)59 Mpls-St.Paul(COLUMN)83(COLUMN)66 Nashville(COLUMN)91(COLUMN)65 New Orleans(COLUMN)94(COLUMN)72 New York(COLUMN)73(COLUMN)61 Norfolk(COLUMN)68(COLUMN)60 North Platte(COLUMN)71(COLUMN)46 Oklahoma City(COLUMN)75(COLUMN)61 Omaha(COLUMN)74(COLUMN)62 Orlando(COLUMN)89(COLUMN)66 Philadelphia(COLUMN)69(COLUMN)61 Phoenix(COLUMN)92(COLUMN)64 Pittsburgh(COLUMN)88(COLUMN)63 Portland,Maine(COLUMN)64(COLUMN)49 Portland,Ore.(COLUMN)67(COLUMN)49 Providence(COLUMN)73(COLUMN)57 Raleigh(COLUMN)81(COLUMN)62 Rapid City(COLUMN)64(COLUMN)53 Reno(COLUMN)78(COLUMN)59 Richmond(COLUMN)74(COLUMN)65 St. Louis(COLUMN)90(COLUMN)68 St.Prog-Tampa(COLUMN)87(COLUMN)69 Salt Lake City(COLUMN)71(COLUMN)45 San Antonio(COLUMN)90(COLUMN)46 San Diego(COLUMN)74(COLUMN)55 San Fracisco(COLUMN)69(COLUMN)54 San Juan(COLUMN)89(COLUMN)74 St. Ste. Marie(COLUMN)86(COLUMN)56 Seattle(COLUMN)63(COLUMN)48 Shreveport(COLUMN)91(COLUMN)70 Sioux Falls(COLUMN)75(COLUMN)62 Spokane(COLUMN)60(COLUMN)46 Syacuse(COLUMN)88(COLUMN)58 Topeida(COLUMN)88(COLUMN)64 Tucson(COLUMN)87(COLUMN)47 Tulsa(COLUMN)79(COLUMN)64 Washington(COLUMN)77(COLUMN)67 Wichita(COLUMN)76(COLUMN)59(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)T. Aberdeen(COLUMN)Cloudy(COLUMN)1 p.M.(COLUMN)70 Amsterdam(COLUMN)clear(COLUMN)1 p.m.(COLUMN)70 Ankara(COLUMN)pt. Cldy.(COLUMN)3 p.m.(COLUMN)75 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)79 Auckland(COLUMN)clear(COLUMN)12 a.m.(COLUMN)43 Berlin(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)72 Birmingham(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)68 Bonn(COLUMN)pt.cldy(COLUMN) 1 p.m.(COLUMN)75 Brussels(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)72 Cairo(COLUMN)pt. cldy.(COLUMN) 2 p.m.(COLUMN)97 Casablanca(COLUMN)claear(COLUMN)12 p.m.(COLUMN)68 Copenhagen(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)68 Dubin(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)68 Geneva(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)64 Hong Kong(COLUMN)pt. cldy(COLUMN) 8 p.m.(COLUMN)81 Jerusalem(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)84 Lisbon(COLUMN)clear(COLUMN)12 p.m.(COLUMN)72 Madrid(COLUMN)pt. cldy.(COLUMN) 1 p.m.(COLUMN)70 Malta(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)72 Manila(COLUMN)cloudy(COLUMN) 8 p.m.(COLUMN)79 Moscow(COLUMN)pt. cldy(COLUMN) 3 p.m.(COLUMN)72 New Delhi(COLUMN)clear(COLUMN) 5 p.m.(COLUMN)106 Nice(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)70 Oslo(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)72 Paris(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)73 Peking(COLUMN)rain(COLUMN)8 p.m.(COLUMN)61 Rome(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)72 Saigon(COLUMN)rain(COLUMN) 8 p.m.(COLUMN)77 Sofia(COLUMN)cloudy(COLUMN) 2 p.m.(COLUMN)57 Stockholm(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)70 Sydney(COLUMN)pt.cldy(COLUMN)10 p.m.(COLUMN)66 Tokyo(COLUMN)cloudy(COLUMN) 9 p.m.(COLUMN)72 Tunis(COLUMN)pt.cldy(COLUMN) 1 p.m.(COLUMN)72 Vienna(COLUMN)pt.cldy(COLUMN) 1 p.m.(COLUMN)70 Warsaw(COLUMN)pt.cldy.(COLUMN) 1 p.m.(COLUMN)72(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)pt.cldy(COLUMN)94(COLUMN)77 Barbados(COLUMN)fair(COLUMN)88(COLUMN)77 Bermuda(COLUMN)haze(COLUMN)76(COLUMN)72 Bogota(COLUMN)cloudy(COLUMN)65(COLUMN)50 Culiacan(COLUMN)pt. cldy.(COLUMN)102(COLUMN)66 Edmonton(COLUMN)clear(COLUMN)70(COLUMN)46 Havana(COLUMN)cloudy(COLUMN)82(COLUMN)72 Montego Bay(COLUMN)cloudy(COLUMN)88(COLUMN)73 Monterrey(COLUMN)pt.cldy(COLUMN)94(COLUMN)73 Montreal(COLUMN)clear(COLUMN)86(COLUMN)64 Nassau(COLUMN)cloudy(COLUMN)82(COLUMN)70 Ottawa(COLUMN)clear(COLUMN)90(COLUMN)61 Regina(COLUMN)clear(COLUMN)73(COLUMN)45 St. Kitts(COLUMN)fair(COLUMN)88(COLUMN)78 St. Thomas(COLUMN)Pt. Cldy.(COLUMN)88(COLUMN)76 Toronto(COLUMN)haze(COLUMN)86(COLUMN)55 Vancouver(COLUMN)cloudy(COLUMN)63(COLUMN)48 Veracrutz(COLUMN)clear(COLUMN)88(COLUMN)75 Winnipeg(COLUMN)clear(COLUMN)75(COLUMN)54(END TABLE)